./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix011_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix011_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix011_tso.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix011_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:56:40,379 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:56:40,445 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:56:40,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:56:40,450 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:56:40,472 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:56:40,472 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:56:40,473 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:56:40,473 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:56:40,477 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:56:40,477 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:56:40,478 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:56:40,479 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:56:40,480 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:56:40,480 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:56:40,480 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:56:40,480 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:56:40,481 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:56:40,481 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:56:40,481 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:56:40,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:56:40,482 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:56:40,482 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:56:40,482 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:56:40,482 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:56:40,483 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:56:40,483 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:56:40,483 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:56:40,484 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:56:40,484 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:56:40,485 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:56:40,485 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:56:40,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:56:40,485 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:56:40,485 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:56:40,486 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:56:40,486 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:56:40,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:56:40,486 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:56:40,486 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:56:40,486 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:56:40,487 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:56:40,487 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:56:40,487 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:56:40,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:56:40,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:56:40,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:56:40,742 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:56:40,743 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:56:40,744 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011_tso.oepc.i [2024-06-27 19:56:41,932 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:56:42,177 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:56:42,177 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011_tso.oepc.i [2024-06-27 19:56:42,191 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b0fbad1f/5f4a4b28440545459740e98c2c093825/FLAG08c9df0b0 [2024-06-27 19:56:42,206 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b0fbad1f/5f4a4b28440545459740e98c2c093825 [2024-06-27 19:56:42,208 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:56:42,209 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:56:42,209 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix011_tso.oepc.yml/witness.yml [2024-06-27 19:56:42,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:56:42,396 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:56:42,398 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:56:42,399 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:56:42,404 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:56:42,405 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:56:42" (1/2) ... [2024-06-27 19:56:42,406 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4973c514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:56:42, skipping insertion in model container [2024-06-27 19:56:42,406 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:56:42" (1/2) ... [2024-06-27 19:56:42,408 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@624925a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:56:42, skipping insertion in model container [2024-06-27 19:56:42,408 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:56:42" (2/2) ... [2024-06-27 19:56:42,409 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4973c514 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:56:42, skipping insertion in model container [2024-06-27 19:56:42,409 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:56:42" (2/2) ... [2024-06-27 19:56:42,409 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:56:42,510 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:56:42,511 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-27 19:56:42,511 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-27 19:56:42,512 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-27 19:56:42,512 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:56:42,512 INFO L106 edCorrectnessWitness]: ghost_update [L836-L836] multithreaded = 1; [2024-06-27 19:56:42,558 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:56:42,943 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:56:42,962 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:56:43,117 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:56:43,154 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:56:43,155 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:56:43 WrapperNode [2024-06-27 19:56:43,156 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:56:43,156 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:56:43,157 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:56:43,157 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:56:43,163 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 27.06 07:56:43" (1/1) ... [2024-06-27 19:56:43,187 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 27.06 07:56:43" (1/1) ... [2024-06-27 19:56:43,223 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 153 [2024-06-27 19:56:43,227 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:56:43,228 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:56:43,228 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:56:43,228 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:56:43,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:56:43" (1/1) ... [2024-06-27 19:56:43,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:56:43" (1/1) ... [2024-06-27 19:56:43,240 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:56:43" (1/1) ... [2024-06-27 19:56:43,263 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]. [2024-06-27 19:56:43,264 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:56:43" (1/1) ... [2024-06-27 19:56:43,264 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:56:43" (1/1) ... [2024-06-27 19:56:43,274 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:56:43" (1/1) ... [2024-06-27 19:56:43,276 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:56:43" (1/1) ... [2024-06-27 19:56:43,278 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:56:43" (1/1) ... [2024-06-27 19:56:43,279 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:56:43" (1/1) ... [2024-06-27 19:56:43,283 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:56:43,284 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:56:43,284 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:56:43,284 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:56:43,285 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:56:43" (1/1) ... [2024-06-27 19:56:43,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:56:43,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:56:43,324 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) [2024-06-27 19:56:43,348 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 [2024-06-27 19:56:43,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:56:43,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:56:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:56:43,367 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:56:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:56:43,368 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:56:43,368 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:56:43,368 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:56:43,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:56:43,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:56:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:56:43,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:56:43,370 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:56:43,537 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:56:43,540 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:56:43,924 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:56:43,924 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:56:44,084 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:56:44,084 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:56:44,084 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:56:44 BoogieIcfgContainer [2024-06-27 19:56:44,085 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:56:44,086 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:56:44,086 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:56:44,089 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:56:44,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:56:42" (1/4) ... [2024-06-27 19:56:44,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aade298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:56:44, skipping insertion in model container [2024-06-27 19:56:44,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:56:42" (2/4) ... [2024-06-27 19:56:44,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aade298 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:56:44, skipping insertion in model container [2024-06-27 19:56:44,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:56:43" (3/4) ... [2024-06-27 19:56:44,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aade298 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:56:44, skipping insertion in model container [2024-06-27 19:56:44,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:56:44" (4/4) ... [2024-06-27 19:56:44,092 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011_tso.oepc.i [2024-06-27 19:56:44,109 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:56:44,109 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:56:44,109 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:56:44,162 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:56:44,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 19:56:44,230 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 19:56:44,230 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:56:44,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:56:44,234 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 19:56:44,237 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 19:56:44,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:56:44,278 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;@6e40df6d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:56:44,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:56:44,285 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:56:44,300 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 19:56:44,300 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:56:44,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:44,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:56:44,302 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:44,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:44,307 INFO L85 PathProgramCache]: Analyzing trace with hash 379635639, now seen corresponding path program 1 times [2024-06-27 19:56:44,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:44,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258825375] [2024-06-27 19:56:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:44,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:45,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:45,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258825375] [2024-06-27 19:56:45,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258825375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:45,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:45,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:56:45,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294279828] [2024-06-27 19:56:45,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:45,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:56:45,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:45,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:56:45,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:56:45,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 19:56:45,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:45,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:45,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 19:56:45,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:45,891 INFO L124 PetriNetUnfolderBase]: 1407/2273 cut-off events. [2024-06-27 19:56:45,891 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-27 19:56:45,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4477 conditions, 2273 events. 1407/2273 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11820 event pairs, 989 based on Foata normal form. 1/2186 useless extension candidates. Maximal degree in co-relation 4465. Up to 2105 conditions per place. [2024-06-27 19:56:45,912 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 19:56:45,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-27 19:56:45,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:56:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:56:45,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-27 19:56:45,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-27 19:56:45,926 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 78 transitions. [2024-06-27 19:56:45,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-27 19:56:45,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:56:45,933 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 19:56:45,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 19:56:45,939 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 19:56:45,939 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 19:56:45,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:45,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:45,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:45,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:56:45,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:45,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:45,942 INFO L85 PathProgramCache]: Analyzing trace with hash -242211092, now seen corresponding path program 1 times [2024-06-27 19:56:45,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:45,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381582540] [2024-06-27 19:56:45,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:45,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:46,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:46,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381582540] [2024-06-27 19:56:46,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381582540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:46,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:46,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:56:46,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871522309] [2024-06-27 19:56:46,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:46,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:56:46,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:46,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:56:46,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:56:46,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:46,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:46,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:46,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:46,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:46,994 INFO L124 PetriNetUnfolderBase]: 1653/2576 cut-off events. [2024-06-27 19:56:46,994 INFO L125 PetriNetUnfolderBase]: For 483/483 co-relation queries the response was YES. [2024-06-27 19:56:46,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5765 conditions, 2576 events. 1653/2576 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13063 event pairs, 1038 based on Foata normal form. 3/2567 useless extension candidates. Maximal degree in co-relation 5753. Up to 2441 conditions per place. [2024-06-27 19:56:47,011 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-27 19:56:47,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-27 19:56:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:56:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:56:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-27 19:56:47,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697674418604651 [2024-06-27 19:56:47,016 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 98 transitions. [2024-06-27 19:56:47,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-27 19:56:47,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:56:47,019 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 19:56:47,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-27 19:56:47,020 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 19:56:47,021 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 19:56:47,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:47,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:47,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:47,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:56:47,024 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:47,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:47,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1081391296, now seen corresponding path program 1 times [2024-06-27 19:56:47,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:47,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420846414] [2024-06-27 19:56:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:47,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:47,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:47,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420846414] [2024-06-27 19:56:47,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420846414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:47,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:47,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:56:47,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274049942] [2024-06-27 19:56:47,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:47,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:56:47,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:47,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:56:47,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:56:47,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:47,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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) [2024-06-27 19:56:47,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:47,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:47,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:48,153 INFO L124 PetriNetUnfolderBase]: 1641/2562 cut-off events. [2024-06-27 19:56:48,153 INFO L125 PetriNetUnfolderBase]: For 1362/1362 co-relation queries the response was YES. [2024-06-27 19:56:48,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6338 conditions, 2562 events. 1641/2562 cut-off events. For 1362/1362 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12981 event pairs, 746 based on Foata normal form. 6/2558 useless extension candidates. Maximal degree in co-relation 6324. Up to 2393 conditions per place. [2024-06-27 19:56:48,167 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-27 19:56:48,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 326 flow [2024-06-27 19:56:48,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:56:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:56:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 19:56:48,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627906976744186 [2024-06-27 19:56:48,169 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 121 transitions. [2024-06-27 19:56:48,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 326 flow [2024-06-27 19:56:48,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 312 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 19:56:48,172 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-27 19:56:48,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 19:56:48,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-27 19:56:48,173 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-27 19:56:48,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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) [2024-06-27 19:56:48,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:48,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:48,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:56:48,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:48,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:48,174 INFO L85 PathProgramCache]: Analyzing trace with hash -164436715, now seen corresponding path program 1 times [2024-06-27 19:56:48,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:48,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293647804] [2024-06-27 19:56:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:48,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:49,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:49,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293647804] [2024-06-27 19:56:49,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293647804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:49,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:49,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:56:49,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559833418] [2024-06-27 19:56:49,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:49,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:56:49,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:49,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:56:49,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:56:49,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:49,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:49,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:49,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:49,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:50,054 INFO L124 PetriNetUnfolderBase]: 1632/2543 cut-off events. [2024-06-27 19:56:50,055 INFO L125 PetriNetUnfolderBase]: For 2524/2524 co-relation queries the response was YES. [2024-06-27 19:56:50,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6885 conditions, 2543 events. 1632/2543 cut-off events. For 2524/2524 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12815 event pairs, 582 based on Foata normal form. 6/2537 useless extension candidates. Maximal degree in co-relation 6870. Up to 2348 conditions per place. [2024-06-27 19:56:50,069 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 52 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-27 19:56:50,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 380 flow [2024-06-27 19:56:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:56:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:56:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 19:56:50,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387596899224806 [2024-06-27 19:56:50,072 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 6 states and 139 transitions. [2024-06-27 19:56:50,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 380 flow [2024-06-27 19:56:50,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 356 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:56:50,075 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 195 flow [2024-06-27 19:56:50,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-27 19:56:50,076 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-27 19:56:50,076 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 195 flow [2024-06-27 19:56:50,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:50,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:50,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:50,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:56:50,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:50,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:50,078 INFO L85 PathProgramCache]: Analyzing trace with hash -229914390, now seen corresponding path program 1 times [2024-06-27 19:56:50,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:50,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149293488] [2024-06-27 19:56:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:50,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:50,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:50,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149293488] [2024-06-27 19:56:50,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149293488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:50,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:50,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:56:50,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265138825] [2024-06-27 19:56:50,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:50,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:56:50,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:50,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:56:50,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:56:50,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:50,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 195 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2024-06-27 19:56:50,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:50,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:50,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:51,280 INFO L124 PetriNetUnfolderBase]: 1375/2224 cut-off events. [2024-06-27 19:56:51,281 INFO L125 PetriNetUnfolderBase]: For 3304/3304 co-relation queries the response was YES. [2024-06-27 19:56:51,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6345 conditions, 2224 events. 1375/2224 cut-off events. For 3304/3304 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11501 event pairs, 673 based on Foata normal form. 2/2178 useless extension candidates. Maximal degree in co-relation 6328. Up to 2047 conditions per place. [2024-06-27 19:56:51,297 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 43 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-27 19:56:51,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 58 transitions, 341 flow [2024-06-27 19:56:51,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:56:51,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:56:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-27 19:56:51,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:56:51,299 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 195 flow. Second operand 5 states and 100 transitions. [2024-06-27 19:56:51,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 58 transitions, 341 flow [2024-06-27 19:56:51,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 308 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:51,303 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 208 flow [2024-06-27 19:56:51,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-27 19:56:51,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-27 19:56:51,304 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 208 flow [2024-06-27 19:56:51,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2024-06-27 19:56:51,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:51,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:51,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:56:51,305 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:51,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:51,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1491189594, now seen corresponding path program 1 times [2024-06-27 19:56:51,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:51,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560681009] [2024-06-27 19:56:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:51,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:52,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:52,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560681009] [2024-06-27 19:56:52,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560681009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:52,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:52,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:56:52,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285735932] [2024-06-27 19:56:52,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:52,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:56:52,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:52,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:56:52,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:56:52,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:52,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:52,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:52,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:52,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:52,768 INFO L124 PetriNetUnfolderBase]: 1621/2661 cut-off events. [2024-06-27 19:56:52,768 INFO L125 PetriNetUnfolderBase]: For 5188/5188 co-relation queries the response was YES. [2024-06-27 19:56:52,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7916 conditions, 2661 events. 1621/2661 cut-off events. For 5188/5188 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14020 event pairs, 804 based on Foata normal form. 2/2637 useless extension candidates. Maximal degree in co-relation 7897. Up to 2396 conditions per place. [2024-06-27 19:56:52,787 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-27 19:56:52,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 384 flow [2024-06-27 19:56:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:56:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:56:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 19:56:52,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2024-06-27 19:56:52,789 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 208 flow. Second operand 6 states and 113 transitions. [2024-06-27 19:56:52,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 384 flow [2024-06-27 19:56:52,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 362 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:56:52,796 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 242 flow [2024-06-27 19:56:52,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-27 19:56:52,799 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-27 19:56:52,799 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 242 flow [2024-06-27 19:56:52,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:52,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:52,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:52,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:56:52,800 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:52,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:52,801 INFO L85 PathProgramCache]: Analyzing trace with hash -994739425, now seen corresponding path program 1 times [2024-06-27 19:56:52,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:52,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886586531] [2024-06-27 19:56:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:52,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:53,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:53,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886586531] [2024-06-27 19:56:53,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886586531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:53,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:53,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:56:53,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934559756] [2024-06-27 19:56:53,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:53,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:56:53,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:53,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:56:53,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:56:53,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:53,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 242 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:53,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:53,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:53,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:54,221 INFO L124 PetriNetUnfolderBase]: 1814/2879 cut-off events. [2024-06-27 19:56:54,221 INFO L125 PetriNetUnfolderBase]: For 8365/8365 co-relation queries the response was YES. [2024-06-27 19:56:54,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9369 conditions, 2879 events. 1814/2879 cut-off events. For 8365/8365 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14803 event pairs, 884 based on Foata normal form. 2/2881 useless extension candidates. Maximal degree in co-relation 9349. Up to 2655 conditions per place. [2024-06-27 19:56:54,250 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-06-27 19:56:54,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 71 transitions, 438 flow [2024-06-27 19:56:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:56:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:56:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 19:56:54,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 19:56:54,252 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 242 flow. Second operand 6 states and 116 transitions. [2024-06-27 19:56:54,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 71 transitions, 438 flow [2024-06-27 19:56:54,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 406 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:54,257 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 268 flow [2024-06-27 19:56:54,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-27 19:56:54,259 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-27 19:56:54,259 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 268 flow [2024-06-27 19:56:54,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:54,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:54,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:54,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:56:54,260 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:54,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:54,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1695345291, now seen corresponding path program 2 times [2024-06-27 19:56:54,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:54,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945139173] [2024-06-27 19:56:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:54,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:55,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:55,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945139173] [2024-06-27 19:56:55,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945139173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:55,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:55,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:56:55,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354300442] [2024-06-27 19:56:55,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:55,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:56:55,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:55,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:56:55,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:56:55,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:55,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:55,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:55,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:55,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:55,649 INFO L124 PetriNetUnfolderBase]: 1809/2874 cut-off events. [2024-06-27 19:56:55,649 INFO L125 PetriNetUnfolderBase]: For 10931/10939 co-relation queries the response was YES. [2024-06-27 19:56:55,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9976 conditions, 2874 events. 1809/2874 cut-off events. For 10931/10939 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14806 event pairs, 891 based on Foata normal form. 10/2884 useless extension candidates. Maximal degree in co-relation 9955. Up to 2630 conditions per place. [2024-06-27 19:56:55,667 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2024-06-27 19:56:55,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 462 flow [2024-06-27 19:56:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:56:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:56:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 19:56:55,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-27 19:56:55,670 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 268 flow. Second operand 6 states and 115 transitions. [2024-06-27 19:56:55,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 462 flow [2024-06-27 19:56:55,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 428 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:55,676 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 308 flow [2024-06-27 19:56:55,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-27 19:56:55,679 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-27 19:56:55,679 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 308 flow [2024-06-27 19:56:55,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:55,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:55,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:55,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:56:55,680 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:55,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:55,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1017761079, now seen corresponding path program 1 times [2024-06-27 19:56:55,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:55,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721623925] [2024-06-27 19:56:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:55,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:56,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:56,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721623925] [2024-06-27 19:56:56,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721623925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:56,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:56,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:56,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687153357] [2024-06-27 19:56:56,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:56,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:56,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:56,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:56,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:56,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:56,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 308 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:56,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:56,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:56,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:57,225 INFO L124 PetriNetUnfolderBase]: 1622/2690 cut-off events. [2024-06-27 19:56:57,225 INFO L125 PetriNetUnfolderBase]: For 11337/11337 co-relation queries the response was YES. [2024-06-27 19:56:57,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9622 conditions, 2690 events. 1622/2690 cut-off events. For 11337/11337 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14329 event pairs, 774 based on Foata normal form. 2/2682 useless extension candidates. Maximal degree in co-relation 9600. Up to 2389 conditions per place. [2024-06-27 19:56:57,244 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 58 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2024-06-27 19:56:57,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 528 flow [2024-06-27 19:56:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:57,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 19:56:57,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 19:56:57,246 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 308 flow. Second operand 7 states and 130 transitions. [2024-06-27 19:56:57,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 528 flow [2024-06-27 19:56:57,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 478 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:57,251 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 328 flow [2024-06-27 19:56:57,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=328, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-27 19:56:57,253 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-27 19:56:57,253 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 328 flow [2024-06-27 19:56:57,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:57,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:57,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:57,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:56:57,254 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:57,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:57,254 INFO L85 PathProgramCache]: Analyzing trace with hash 124756255, now seen corresponding path program 1 times [2024-06-27 19:56:57,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:57,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51233830] [2024-06-27 19:56:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:57,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:58,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:58,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51233830] [2024-06-27 19:56:58,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51233830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:58,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:58,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:58,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086923669] [2024-06-27 19:56:58,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:58,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:58,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:58,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:58,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:58,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:58,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 328 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:58,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:58,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:58,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:58,780 INFO L124 PetriNetUnfolderBase]: 1826/2913 cut-off events. [2024-06-27 19:56:58,780 INFO L125 PetriNetUnfolderBase]: For 16769/16769 co-relation queries the response was YES. [2024-06-27 19:56:58,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11323 conditions, 2913 events. 1826/2913 cut-off events. For 16769/16769 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15004 event pairs, 706 based on Foata normal form. 4/2917 useless extension candidates. Maximal degree in co-relation 11300. Up to 2634 conditions per place. [2024-06-27 19:56:58,799 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 67 selfloop transitions, 17 changer transitions 0/91 dead transitions. [2024-06-27 19:56:58,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 604 flow [2024-06-27 19:56:58,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 19:56:58,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-27 19:56:58,801 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 328 flow. Second operand 7 states and 138 transitions. [2024-06-27 19:56:58,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 604 flow [2024-06-27 19:56:58,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 91 transitions, 558 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:58,812 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 378 flow [2024-06-27 19:56:58,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=378, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-27 19:56:58,814 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-27 19:56:58,814 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 378 flow [2024-06-27 19:56:58,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:58,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:58,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:58,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:56:58,815 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:58,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:58,815 INFO L85 PathProgramCache]: Analyzing trace with hash 917587931, now seen corresponding path program 1 times [2024-06-27 19:56:58,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:58,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622305867] [2024-06-27 19:56:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:58,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:59,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:59,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622305867] [2024-06-27 19:56:59,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622305867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:59,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:59,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:59,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914260619] [2024-06-27 19:56:59,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:59,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:59,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:59,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:59,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:59,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:56:59,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 378 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:59,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:59,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:56:59,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:00,271 INFO L124 PetriNetUnfolderBase]: 1952/3043 cut-off events. [2024-06-27 19:57:00,271 INFO L125 PetriNetUnfolderBase]: For 20318/20318 co-relation queries the response was YES. [2024-06-27 19:57:00,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12613 conditions, 3043 events. 1952/3043 cut-off events. For 20318/20318 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15173 event pairs, 753 based on Foata normal form. 2/3045 useless extension candidates. Maximal degree in co-relation 12588. Up to 2854 conditions per place. [2024-06-27 19:57:00,291 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 71 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-27 19:57:00,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 90 transitions, 638 flow [2024-06-27 19:57:00,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:00,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:00,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 19:57:00,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-27 19:57:00,292 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 378 flow. Second operand 7 states and 127 transitions. [2024-06-27 19:57:00,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 90 transitions, 638 flow [2024-06-27 19:57:00,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 90 transitions, 594 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 19:57:00,301 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 410 flow [2024-06-27 19:57:00,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=410, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-06-27 19:57:00,302 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-27 19:57:00,302 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 410 flow [2024-06-27 19:57:00,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:00,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:00,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:00,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:57:00,303 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:00,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:00,303 INFO L85 PathProgramCache]: Analyzing trace with hash 124876225, now seen corresponding path program 2 times [2024-06-27 19:57:00,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:00,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717736094] [2024-06-27 19:57:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:00,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:01,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:01,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717736094] [2024-06-27 19:57:01,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717736094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:01,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:01,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:01,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618580107] [2024-06-27 19:57:01,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:01,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:01,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:01,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:01,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:01,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 410 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:01,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:01,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:01,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:01,647 INFO L124 PetriNetUnfolderBase]: 1883/2979 cut-off events. [2024-06-27 19:57:01,647 INFO L125 PetriNetUnfolderBase]: For 25130/25136 co-relation queries the response was YES. [2024-06-27 19:57:01,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13082 conditions, 2979 events. 1883/2979 cut-off events. For 25130/25136 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15237 event pairs, 689 based on Foata normal form. 4/2976 useless extension candidates. Maximal degree in co-relation 13056. Up to 2666 conditions per place. [2024-06-27 19:57:01,667 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 68 selfloop transitions, 24 changer transitions 0/100 dead transitions. [2024-06-27 19:57:01,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 786 flow [2024-06-27 19:57:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 19:57:01,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:57:01,669 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 410 flow. Second operand 7 states and 140 transitions. [2024-06-27 19:57:01,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 786 flow [2024-06-27 19:57:01,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 100 transitions, 734 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 19:57:01,681 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 500 flow [2024-06-27 19:57:01,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=500, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-27 19:57:01,682 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-27 19:57:01,682 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 500 flow [2024-06-27 19:57:01,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:01,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:01,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:01,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:57:01,683 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:01,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:01,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1486066847, now seen corresponding path program 3 times [2024-06-27 19:57:01,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:01,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231385401] [2024-06-27 19:57:01,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:01,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:02,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:02,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231385401] [2024-06-27 19:57:02,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231385401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:02,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:02,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:02,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294362446] [2024-06-27 19:57:02,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:02,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:02,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:02,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:02,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:02,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:02,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 500 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:02,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:02,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:02,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:03,196 INFO L124 PetriNetUnfolderBase]: 1869/2981 cut-off events. [2024-06-27 19:57:03,197 INFO L125 PetriNetUnfolderBase]: For 29748/29754 co-relation queries the response was YES. [2024-06-27 19:57:03,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13606 conditions, 2981 events. 1869/2981 cut-off events. For 29748/29754 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15338 event pairs, 701 based on Foata normal form. 8/2989 useless extension candidates. Maximal degree in co-relation 13579. Up to 2615 conditions per place. [2024-06-27 19:57:03,215 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 31 changer transitions 0/100 dead transitions. [2024-06-27 19:57:03,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 100 transitions, 838 flow [2024-06-27 19:57:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 19:57:03,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-27 19:57:03,217 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 500 flow. Second operand 7 states and 139 transitions. [2024-06-27 19:57:03,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 100 transitions, 838 flow [2024-06-27 19:57:03,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 100 transitions, 790 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 19:57:03,236 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 574 flow [2024-06-27 19:57:03,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=574, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2024-06-27 19:57:03,238 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-27 19:57:03,238 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 574 flow [2024-06-27 19:57:03,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:03,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:03,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:03,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:57:03,239 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:03,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:03,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1486066661, now seen corresponding path program 2 times [2024-06-27 19:57:03,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:03,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346454512] [2024-06-27 19:57:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:03,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:04,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:04,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346454512] [2024-06-27 19:57:04,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346454512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:04,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:04,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:04,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887858365] [2024-06-27 19:57:04,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:04,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:04,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:04,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:04,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:04,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:04,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 574 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:04,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:04,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:04,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:04,642 INFO L124 PetriNetUnfolderBase]: 1991/3106 cut-off events. [2024-06-27 19:57:04,643 INFO L125 PetriNetUnfolderBase]: For 34203/34213 co-relation queries the response was YES. [2024-06-27 19:57:04,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14819 conditions, 3106 events. 1991/3106 cut-off events. For 34203/34213 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15514 event pairs, 745 based on Foata normal form. 12/3118 useless extension candidates. Maximal degree in co-relation 14790. Up to 2864 conditions per place. [2024-06-27 19:57:04,661 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 73 selfloop transitions, 26 changer transitions 0/104 dead transitions. [2024-06-27 19:57:04,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 104 transitions, 964 flow [2024-06-27 19:57:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:04,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 19:57:04,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 19:57:04,663 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 574 flow. Second operand 7 states and 130 transitions. [2024-06-27 19:57:04,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 104 transitions, 964 flow [2024-06-27 19:57:04,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 104 transitions, 866 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 19:57:04,682 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 630 flow [2024-06-27 19:57:04,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=630, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-27 19:57:04,683 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-27 19:57:04,683 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 630 flow [2024-06-27 19:57:04,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:04,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:04,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:04,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:57:04,684 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:04,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:04,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1485829511, now seen corresponding path program 3 times [2024-06-27 19:57:04,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:04,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533287447] [2024-06-27 19:57:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:04,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:05,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:05,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533287447] [2024-06-27 19:57:05,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533287447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:05,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:05,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:05,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967972377] [2024-06-27 19:57:05,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:05,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:05,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:05,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:05,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:05,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:05,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 630 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:05,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:05,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:05,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:06,028 INFO L124 PetriNetUnfolderBase]: 1986/3099 cut-off events. [2024-06-27 19:57:06,029 INFO L125 PetriNetUnfolderBase]: For 38437/38447 co-relation queries the response was YES. [2024-06-27 19:57:06,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15222 conditions, 3099 events. 1986/3099 cut-off events. For 38437/38447 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15488 event pairs, 745 based on Foata normal form. 12/3111 useless extension candidates. Maximal degree in co-relation 15192. Up to 2859 conditions per place. [2024-06-27 19:57:06,050 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 70 selfloop transitions, 27 changer transitions 0/102 dead transitions. [2024-06-27 19:57:06,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 102 transitions, 872 flow [2024-06-27 19:57:06,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:06,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 19:57:06,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-27 19:57:06,052 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 630 flow. Second operand 7 states and 127 transitions. [2024-06-27 19:57:06,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 102 transitions, 872 flow [2024-06-27 19:57:06,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 102 transitions, 780 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 19:57:06,076 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 600 flow [2024-06-27 19:57:06,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=600, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2024-06-27 19:57:06,077 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-27 19:57:06,077 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 600 flow [2024-06-27 19:57:06,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:06,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:06,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:06,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:57:06,078 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:06,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:06,078 INFO L85 PathProgramCache]: Analyzing trace with hash -94494759, now seen corresponding path program 1 times [2024-06-27 19:57:06,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:06,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425323283] [2024-06-27 19:57:06,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:06,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:06,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:06,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425323283] [2024-06-27 19:57:06,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425323283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:06,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:06,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:57:06,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409280651] [2024-06-27 19:57:06,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:06,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:57:06,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:06,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:57:06,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:57:06,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:06,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 600 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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) [2024-06-27 19:57:06,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:06,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:06,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:07,205 INFO L124 PetriNetUnfolderBase]: 2166/3389 cut-off events. [2024-06-27 19:57:07,205 INFO L125 PetriNetUnfolderBase]: For 45590/45590 co-relation queries the response was YES. [2024-06-27 19:57:07,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16866 conditions, 3389 events. 2166/3389 cut-off events. For 45590/45590 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17017 event pairs, 834 based on Foata normal form. 1/3390 useless extension candidates. Maximal degree in co-relation 16834. Up to 3173 conditions per place. [2024-06-27 19:57:07,223 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 77 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2024-06-27 19:57:07,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 94 transitions, 812 flow [2024-06-27 19:57:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:57:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:57:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-27 19:57:07,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-27 19:57:07,224 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 600 flow. Second operand 5 states and 88 transitions. [2024-06-27 19:57:07,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 94 transitions, 812 flow [2024-06-27 19:57:07,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 94 transitions, 750 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:07,251 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 588 flow [2024-06-27 19:57:07,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=588, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-27 19:57:07,251 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-27 19:57:07,251 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 588 flow [2024-06-27 19:57:07,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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) [2024-06-27 19:57:07,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:07,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:07,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:57:07,252 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:07,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:07,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1619697270, now seen corresponding path program 1 times [2024-06-27 19:57:07,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:07,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533555257] [2024-06-27 19:57:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:07,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:08,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:08,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533555257] [2024-06-27 19:57:08,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533555257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:08,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:08,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:08,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205417133] [2024-06-27 19:57:08,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:08,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:08,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:08,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:08,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:08,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:08,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 588 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-27 19:57:08,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:08,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:08,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:09,213 INFO L124 PetriNetUnfolderBase]: 1965/3081 cut-off events. [2024-06-27 19:57:09,214 INFO L125 PetriNetUnfolderBase]: For 50240/50240 co-relation queries the response was YES. [2024-06-27 19:57:09,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16462 conditions, 3081 events. 1965/3081 cut-off events. For 50240/50240 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15767 event pairs, 724 based on Foata normal form. 2/3083 useless extension candidates. Maximal degree in co-relation 16429. Up to 2772 conditions per place. [2024-06-27 19:57:09,229 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 82 selfloop transitions, 19 changer transitions 0/112 dead transitions. [2024-06-27 19:57:09,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 112 transitions, 858 flow [2024-06-27 19:57:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:09,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 19:57:09,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-27 19:57:09,231 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 588 flow. Second operand 7 states and 138 transitions. [2024-06-27 19:57:09,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 112 transitions, 858 flow [2024-06-27 19:57:09,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 806 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 19:57:09,249 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 586 flow [2024-06-27 19:57:09,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=586, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2024-06-27 19:57:09,250 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-27 19:57:09,250 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 586 flow [2024-06-27 19:57:09,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-27 19:57:09,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:09,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:09,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:57:09,251 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:09,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:09,252 INFO L85 PathProgramCache]: Analyzing trace with hash -423946739, now seen corresponding path program 1 times [2024-06-27 19:57:09,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:09,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769552795] [2024-06-27 19:57:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:09,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:10,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:10,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769552795] [2024-06-27 19:57:10,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769552795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:10,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:10,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:10,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067248515] [2024-06-27 19:57:10,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:10,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:10,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:10,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:10,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:10,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:10,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 586 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:10,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:10,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:10,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:10,765 INFO L124 PetriNetUnfolderBase]: 2098/3224 cut-off events. [2024-06-27 19:57:10,765 INFO L125 PetriNetUnfolderBase]: For 55863/55863 co-relation queries the response was YES. [2024-06-27 19:57:10,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17540 conditions, 3224 events. 2098/3224 cut-off events. For 55863/55863 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15985 event pairs, 759 based on Foata normal form. 4/3228 useless extension candidates. Maximal degree in co-relation 17506. Up to 2971 conditions per place. [2024-06-27 19:57:10,781 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 94 selfloop transitions, 20 changer transitions 0/120 dead transitions. [2024-06-27 19:57:10,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 120 transitions, 944 flow [2024-06-27 19:57:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:10,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:57:10,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 19:57:10,783 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 586 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:57:10,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 120 transitions, 944 flow [2024-06-27 19:57:10,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 120 transitions, 898 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:10,804 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 642 flow [2024-06-27 19:57:10,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=642, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2024-06-27 19:57:10,804 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-27 19:57:10,804 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 642 flow [2024-06-27 19:57:10,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:10,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:10,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:10,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:57:10,805 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:10,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:10,805 INFO L85 PathProgramCache]: Analyzing trace with hash -423797009, now seen corresponding path program 2 times [2024-06-27 19:57:10,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:10,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156658453] [2024-06-27 19:57:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:10,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:11,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:11,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156658453] [2024-06-27 19:57:11,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156658453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:11,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:11,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:11,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365123245] [2024-06-27 19:57:11,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:11,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:11,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:11,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:11,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:11,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:11,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 642 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:11,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:11,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:11,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:12,264 INFO L124 PetriNetUnfolderBase]: 2154/3305 cut-off events. [2024-06-27 19:57:12,264 INFO L125 PetriNetUnfolderBase]: For 64256/64256 co-relation queries the response was YES. [2024-06-27 19:57:12,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18788 conditions, 3305 events. 2154/3305 cut-off events. For 64256/64256 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16412 event pairs, 740 based on Foata normal form. 4/3309 useless extension candidates. Maximal degree in co-relation 18753. Up to 2954 conditions per place. [2024-06-27 19:57:12,280 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 85 selfloop transitions, 35 changer transitions 0/126 dead transitions. [2024-06-27 19:57:12,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 126 transitions, 1142 flow [2024-06-27 19:57:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:57:12,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:57:12,281 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 642 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:57:12,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 126 transitions, 1142 flow [2024-06-27 19:57:12,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 126 transitions, 1064 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:12,306 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 756 flow [2024-06-27 19:57:12,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=756, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2024-06-27 19:57:12,307 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-27 19:57:12,307 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 756 flow [2024-06-27 19:57:12,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:12,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:12,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:12,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:57:12,308 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:12,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:12,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1833169241, now seen corresponding path program 3 times [2024-06-27 19:57:12,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:12,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409737361] [2024-06-27 19:57:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:12,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:13,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:13,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409737361] [2024-06-27 19:57:13,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409737361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:13,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:13,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:13,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983396270] [2024-06-27 19:57:13,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:13,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:13,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:13,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:13,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:13,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:13,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 756 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:13,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:13,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:13,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:13,851 INFO L124 PetriNetUnfolderBase]: 2160/3309 cut-off events. [2024-06-27 19:57:13,851 INFO L125 PetriNetUnfolderBase]: For 72361/72367 co-relation queries the response was YES. [2024-06-27 19:57:13,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19486 conditions, 3309 events. 2160/3309 cut-off events. For 72361/72367 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16437 event pairs, 752 based on Foata normal form. 4/3307 useless extension candidates. Maximal degree in co-relation 19450. Up to 2963 conditions per place. [2024-06-27 19:57:13,866 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 87 selfloop transitions, 36 changer transitions 0/129 dead transitions. [2024-06-27 19:57:13,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 129 transitions, 1218 flow [2024-06-27 19:57:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:13,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 19:57:13,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 19:57:13,869 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 756 flow. Second operand 8 states and 153 transitions. [2024-06-27 19:57:13,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 129 transitions, 1218 flow [2024-06-27 19:57:13,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 129 transitions, 1134 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 19:57:13,899 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 812 flow [2024-06-27 19:57:13,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=812, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2024-06-27 19:57:13,900 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-27 19:57:13,900 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 812 flow [2024-06-27 19:57:13,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:13,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:13,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:13,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:57:13,901 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:13,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:13,901 INFO L85 PathProgramCache]: Analyzing trace with hash -423796792, now seen corresponding path program 1 times [2024-06-27 19:57:13,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:13,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164065831] [2024-06-27 19:57:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:13,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:14,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:14,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164065831] [2024-06-27 19:57:14,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164065831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:14,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:14,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:14,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183043768] [2024-06-27 19:57:14,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:14,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:14,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:14,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:14,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:14,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:14,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 812 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:14,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:14,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:14,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:15,461 INFO L124 PetriNetUnfolderBase]: 2178/3339 cut-off events. [2024-06-27 19:57:15,461 INFO L125 PetriNetUnfolderBase]: For 77725/77731 co-relation queries the response was YES. [2024-06-27 19:57:15,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19960 conditions, 3339 events. 2178/3339 cut-off events. For 77725/77731 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16637 event pairs, 744 based on Foata normal form. 2/3334 useless extension candidates. Maximal degree in co-relation 19922. Up to 3131 conditions per place. [2024-06-27 19:57:15,480 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 104 selfloop transitions, 17 changer transitions 0/127 dead transitions. [2024-06-27 19:57:15,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 127 transitions, 1170 flow [2024-06-27 19:57:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 19:57:15,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-27 19:57:15,481 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 812 flow. Second operand 8 states and 143 transitions. [2024-06-27 19:57:15,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 127 transitions, 1170 flow [2024-06-27 19:57:15,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 127 transitions, 1076 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:57:15,518 INFO L231 Difference]: Finished difference. Result has 96 places, 101 transitions, 816 flow [2024-06-27 19:57:15,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=816, PETRI_PLACES=96, PETRI_TRANSITIONS=101} [2024-06-27 19:57:15,518 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-27 19:57:15,518 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 101 transitions, 816 flow [2024-06-27 19:57:15,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:15,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:15,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:15,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:57:15,519 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:15,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1176575528, now seen corresponding path program 2 times [2024-06-27 19:57:15,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:15,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719801263] [2024-06-27 19:57:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:15,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:16,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:16,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719801263] [2024-06-27 19:57:16,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719801263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:16,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:16,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:16,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466770498] [2024-06-27 19:57:16,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:16,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:16,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:16,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:16,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:16,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:16,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 101 transitions, 816 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:16,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:16,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:16,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:16,992 INFO L124 PetriNetUnfolderBase]: 2189/3357 cut-off events. [2024-06-27 19:57:16,992 INFO L125 PetriNetUnfolderBase]: For 84894/84910 co-relation queries the response was YES. [2024-06-27 19:57:17,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20549 conditions, 3357 events. 2189/3357 cut-off events. For 84894/84910 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16796 event pairs, 751 based on Foata normal form. 12/3362 useless extension candidates. Maximal degree in co-relation 20510. Up to 3068 conditions per place. [2024-06-27 19:57:17,012 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 91 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2024-06-27 19:57:17,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 132 transitions, 1324 flow [2024-06-27 19:57:17,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 19:57:17,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 19:57:17,013 INFO L175 Difference]: Start difference. First operand has 96 places, 101 transitions, 816 flow. Second operand 8 states and 148 transitions. [2024-06-27 19:57:17,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 132 transitions, 1324 flow [2024-06-27 19:57:17,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 132 transitions, 1250 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:17,091 INFO L231 Difference]: Finished difference. Result has 98 places, 107 transitions, 938 flow [2024-06-27 19:57:17,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=938, PETRI_PLACES=98, PETRI_TRANSITIONS=107} [2024-06-27 19:57:17,092 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-27 19:57:17,092 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 107 transitions, 938 flow [2024-06-27 19:57:17,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:17,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:17,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:17,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:57:17,093 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:17,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:17,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1176575311, now seen corresponding path program 4 times [2024-06-27 19:57:17,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:17,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137483571] [2024-06-27 19:57:17,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:17,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:17,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:17,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137483571] [2024-06-27 19:57:17,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137483571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:17,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:17,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:17,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522861309] [2024-06-27 19:57:17,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:17,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:17,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:17,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:17,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:18,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:18,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 107 transitions, 938 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:18,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:18,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:18,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:18,469 INFO L124 PetriNetUnfolderBase]: 2238/3439 cut-off events. [2024-06-27 19:57:18,469 INFO L125 PetriNetUnfolderBase]: For 96574/96580 co-relation queries the response was YES. [2024-06-27 19:57:18,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21844 conditions, 3439 events. 2238/3439 cut-off events. For 96574/96580 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17175 event pairs, 756 based on Foata normal form. 8/3447 useless extension candidates. Maximal degree in co-relation 21804. Up to 2941 conditions per place. [2024-06-27 19:57:18,488 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 87 selfloop transitions, 56 changer transitions 0/149 dead transitions. [2024-06-27 19:57:18,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 149 transitions, 1760 flow [2024-06-27 19:57:18,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 19:57:18,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-27 19:57:18,490 INFO L175 Difference]: Start difference. First operand has 98 places, 107 transitions, 938 flow. Second operand 8 states and 159 transitions. [2024-06-27 19:57:18,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 149 transitions, 1760 flow [2024-06-27 19:57:18,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 149 transitions, 1678 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 19:57:18,550 INFO L231 Difference]: Finished difference. Result has 102 places, 116 transitions, 1174 flow [2024-06-27 19:57:18,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1174, PETRI_PLACES=102, PETRI_TRANSITIONS=116} [2024-06-27 19:57:18,551 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 19:57:18,551 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 116 transitions, 1174 flow [2024-06-27 19:57:18,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:18,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:18,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:18,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:57:18,552 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:18,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:18,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1176569731, now seen corresponding path program 5 times [2024-06-27 19:57:18,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:18,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281846028] [2024-06-27 19:57:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:18,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:19,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:19,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281846028] [2024-06-27 19:57:19,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281846028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:19,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:19,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:19,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902375072] [2024-06-27 19:57:19,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:19,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:19,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:19,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:19,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:19,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:19,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 116 transitions, 1174 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:19,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:19,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:19,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:19,896 INFO L124 PetriNetUnfolderBase]: 2228/3430 cut-off events. [2024-06-27 19:57:19,896 INFO L125 PetriNetUnfolderBase]: For 104735/104741 co-relation queries the response was YES. [2024-06-27 19:57:19,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22497 conditions, 3430 events. 2228/3430 cut-off events. For 104735/104741 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17142 event pairs, 756 based on Foata normal form. 8/3438 useless extension candidates. Maximal degree in co-relation 22455. Up to 2933 conditions per place. [2024-06-27 19:57:19,918 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 83 selfloop transitions, 57 changer transitions 0/146 dead transitions. [2024-06-27 19:57:19,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 146 transitions, 1712 flow [2024-06-27 19:57:19,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:19,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 19:57:19,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 19:57:19,919 INFO L175 Difference]: Start difference. First operand has 102 places, 116 transitions, 1174 flow. Second operand 8 states and 155 transitions. [2024-06-27 19:57:19,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 146 transitions, 1712 flow [2024-06-27 19:57:19,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 146 transitions, 1516 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-27 19:57:19,993 INFO L231 Difference]: Finished difference. Result has 106 places, 116 transitions, 1100 flow [2024-06-27 19:57:19,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1100, PETRI_PLACES=106, PETRI_TRANSITIONS=116} [2024-06-27 19:57:19,994 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-27 19:57:19,994 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 116 transitions, 1100 flow [2024-06-27 19:57:19,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:19,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:19,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:19,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:57:19,995 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:19,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:19,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1434476732, now seen corresponding path program 3 times [2024-06-27 19:57:19,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:19,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181919950] [2024-06-27 19:57:19,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:19,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:20,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:20,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181919950] [2024-06-27 19:57:20,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181919950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:20,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:20,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:20,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084051379] [2024-06-27 19:57:20,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:20,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:20,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:20,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:20,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:20,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:20,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 116 transitions, 1100 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:20,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:20,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:20,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:21,363 INFO L124 PetriNetUnfolderBase]: 2237/3441 cut-off events. [2024-06-27 19:57:21,363 INFO L125 PetriNetUnfolderBase]: For 107443/107453 co-relation queries the response was YES. [2024-06-27 19:57:21,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22407 conditions, 3441 events. 2237/3441 cut-off events. For 107443/107453 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17232 event pairs, 750 based on Foata normal form. 12/3453 useless extension candidates. Maximal degree in co-relation 22364. Up to 3133 conditions per place. [2024-06-27 19:57:21,382 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 99 selfloop transitions, 39 changer transitions 0/144 dead transitions. [2024-06-27 19:57:21,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 144 transitions, 1590 flow [2024-06-27 19:57:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 19:57:21,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 19:57:21,383 INFO L175 Difference]: Start difference. First operand has 106 places, 116 transitions, 1100 flow. Second operand 8 states and 147 transitions. [2024-06-27 19:57:21,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 144 transitions, 1590 flow [2024-06-27 19:57:21,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 144 transitions, 1472 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:21,459 INFO L231 Difference]: Finished difference. Result has 108 places, 119 transitions, 1126 flow [2024-06-27 19:57:21,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1126, PETRI_PLACES=108, PETRI_TRANSITIONS=119} [2024-06-27 19:57:21,460 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-27 19:57:21,460 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 119 transitions, 1126 flow [2024-06-27 19:57:21,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:21,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:21,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:21,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:57:21,461 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:21,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:21,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1184194088, now seen corresponding path program 4 times [2024-06-27 19:57:21,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:21,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856705507] [2024-06-27 19:57:21,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:21,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:22,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:22,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856705507] [2024-06-27 19:57:22,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856705507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:22,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:22,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:22,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716191571] [2024-06-27 19:57:22,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:22,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:22,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:22,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:22,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:22,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:22,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 119 transitions, 1126 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:22,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:22,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:22,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:22,887 INFO L124 PetriNetUnfolderBase]: 2232/3434 cut-off events. [2024-06-27 19:57:22,887 INFO L125 PetriNetUnfolderBase]: For 113871/113881 co-relation queries the response was YES. [2024-06-27 19:57:22,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22466 conditions, 3434 events. 2232/3434 cut-off events. For 113871/113881 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17200 event pairs, 750 based on Foata normal form. 12/3446 useless extension candidates. Maximal degree in co-relation 22422. Up to 3128 conditions per place. [2024-06-27 19:57:22,910 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 41 changer transitions 0/142 dead transitions. [2024-06-27 19:57:22,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1456 flow [2024-06-27 19:57:22,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 19:57:22,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 19:57:22,911 INFO L175 Difference]: Start difference. First operand has 108 places, 119 transitions, 1126 flow. Second operand 8 states and 144 transitions. [2024-06-27 19:57:22,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1456 flow [2024-06-27 19:57:22,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 142 transitions, 1288 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:22,990 INFO L231 Difference]: Finished difference. Result has 110 places, 119 transitions, 1048 flow [2024-06-27 19:57:22,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1048, PETRI_PLACES=110, PETRI_TRANSITIONS=119} [2024-06-27 19:57:22,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-27 19:57:22,991 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 119 transitions, 1048 flow [2024-06-27 19:57:22,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:22,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:22,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:22,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:57:22,991 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:22,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:22,992 INFO L85 PathProgramCache]: Analyzing trace with hash -416082191, now seen corresponding path program 6 times [2024-06-27 19:57:22,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:22,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707493042] [2024-06-27 19:57:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:22,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:23,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:23,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707493042] [2024-06-27 19:57:23,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707493042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:23,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:23,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:23,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961015308] [2024-06-27 19:57:23,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:23,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:23,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:23,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:23,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:23,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:23,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 119 transitions, 1048 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:23,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:23,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:23,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:24,378 INFO L124 PetriNetUnfolderBase]: 2224/3425 cut-off events. [2024-06-27 19:57:24,378 INFO L125 PetriNetUnfolderBase]: For 120252/120258 co-relation queries the response was YES. [2024-06-27 19:57:24,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22495 conditions, 3425 events. 2224/3425 cut-off events. For 120252/120258 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17094 event pairs, 744 based on Foata normal form. 8/3433 useless extension candidates. Maximal degree in co-relation 22450. Up to 2934 conditions per place. [2024-06-27 19:57:24,400 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 81 selfloop transitions, 60 changer transitions 0/147 dead transitions. [2024-06-27 19:57:24,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 147 transitions, 1506 flow [2024-06-27 19:57:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:24,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:57:24,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:57:24,401 INFO L175 Difference]: Start difference. First operand has 110 places, 119 transitions, 1048 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:57:24,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 147 transitions, 1506 flow [2024-06-27 19:57:24,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 147 transitions, 1378 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:24,469 INFO L231 Difference]: Finished difference. Result has 111 places, 119 transitions, 1048 flow [2024-06-27 19:57:24,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1048, PETRI_PLACES=111, PETRI_TRANSITIONS=119} [2024-06-27 19:57:24,469 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-27 19:57:24,470 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 119 transitions, 1048 flow [2024-06-27 19:57:24,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-27 19:57:24,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:24,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:24,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:57:24,470 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:24,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:24,471 INFO L85 PathProgramCache]: Analyzing trace with hash -415805144, now seen corresponding path program 1 times [2024-06-27 19:57:24,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:24,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063761806] [2024-06-27 19:57:24,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:24,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:25,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:25,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063761806] [2024-06-27 19:57:25,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063761806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:25,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:25,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:25,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366878170] [2024-06-27 19:57:25,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:25,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:25,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:25,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:25,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:25,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:25,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 119 transitions, 1048 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:25,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:25,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:25,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:26,323 INFO L124 PetriNetUnfolderBase]: 2207/3500 cut-off events. [2024-06-27 19:57:26,323 INFO L125 PetriNetUnfolderBase]: For 124520/124520 co-relation queries the response was YES. [2024-06-27 19:57:26,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22581 conditions, 3500 events. 2207/3500 cut-off events. For 124520/124520 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18044 event pairs, 719 based on Foata normal form. 2/3502 useless extension candidates. Maximal degree in co-relation 22535. Up to 3174 conditions per place. [2024-06-27 19:57:26,353 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 126 selfloop transitions, 20 changer transitions 0/152 dead transitions. [2024-06-27 19:57:26,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 152 transitions, 1473 flow [2024-06-27 19:57:26,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 19:57:26,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-27 19:57:26,356 INFO L175 Difference]: Start difference. First operand has 111 places, 119 transitions, 1048 flow. Second operand 9 states and 156 transitions. [2024-06-27 19:57:26,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 152 transitions, 1473 flow [2024-06-27 19:57:26,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 152 transitions, 1329 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:26,443 INFO L231 Difference]: Finished difference. Result has 113 places, 125 transitions, 1029 flow [2024-06-27 19:57:26,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1029, PETRI_PLACES=113, PETRI_TRANSITIONS=125} [2024-06-27 19:57:26,443 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-27 19:57:26,443 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 125 transitions, 1029 flow [2024-06-27 19:57:26,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:26,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:26,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:26,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:57:26,444 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:26,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:26,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1397805757, now seen corresponding path program 1 times [2024-06-27 19:57:26,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:26,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148478997] [2024-06-27 19:57:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:26,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:27,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:27,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148478997] [2024-06-27 19:57:27,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148478997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:27,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:27,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:57:27,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965488121] [2024-06-27 19:57:27,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:27,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:57:27,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:27,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:57:27,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:57:27,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:27,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 125 transitions, 1029 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:27,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:27,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:27,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:27,735 INFO L124 PetriNetUnfolderBase]: 2306/3597 cut-off events. [2024-06-27 19:57:27,736 INFO L125 PetriNetUnfolderBase]: For 128862/128862 co-relation queries the response was YES. [2024-06-27 19:57:27,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23399 conditions, 3597 events. 2306/3597 cut-off events. For 128862/128862 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18074 event pairs, 781 based on Foata normal form. 2/3599 useless extension candidates. Maximal degree in co-relation 23351. Up to 3340 conditions per place. [2024-06-27 19:57:27,759 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 111 selfloop transitions, 11 changer transitions 0/138 dead transitions. [2024-06-27 19:57:27,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 138 transitions, 1325 flow [2024-06-27 19:57:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:57:27,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:57:27,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 19:57:27,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 19:57:27,760 INFO L175 Difference]: Start difference. First operand has 113 places, 125 transitions, 1029 flow. Second operand 6 states and 102 transitions. [2024-06-27 19:57:27,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 138 transitions, 1325 flow [2024-06-27 19:57:27,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 138 transitions, 1245 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:27,852 INFO L231 Difference]: Finished difference. Result has 113 places, 128 transitions, 1011 flow [2024-06-27 19:57:27,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=949, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1011, PETRI_PLACES=113, PETRI_TRANSITIONS=128} [2024-06-27 19:57:27,853 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-27 19:57:27,853 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 128 transitions, 1011 flow [2024-06-27 19:57:27,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:27,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:27,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:27,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:57:27,854 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:27,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:27,855 INFO L85 PathProgramCache]: Analyzing trace with hash -371129698, now seen corresponding path program 1 times [2024-06-27 19:57:27,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:27,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768869413] [2024-06-27 19:57:27,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:27,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:28,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:28,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768869413] [2024-06-27 19:57:28,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768869413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:28,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:28,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:28,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889274890] [2024-06-27 19:57:28,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:28,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:28,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:28,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:28,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:29,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:29,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 128 transitions, 1011 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:29,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:29,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:29,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:29,769 INFO L124 PetriNetUnfolderBase]: 2339/3651 cut-off events. [2024-06-27 19:57:29,769 INFO L125 PetriNetUnfolderBase]: For 155116/155116 co-relation queries the response was YES. [2024-06-27 19:57:29,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25482 conditions, 3651 events. 2339/3651 cut-off events. For 155116/155116 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18926 event pairs, 616 based on Foata normal form. 4/3655 useless extension candidates. Maximal degree in co-relation 25433. Up to 3244 conditions per place. [2024-06-27 19:57:29,791 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 125 selfloop transitions, 17 changer transitions 0/161 dead transitions. [2024-06-27 19:57:29,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 161 transitions, 1427 flow [2024-06-27 19:57:29,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:29,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 19:57:29,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 19:57:29,793 INFO L175 Difference]: Start difference. First operand has 113 places, 128 transitions, 1011 flow. Second operand 8 states and 154 transitions. [2024-06-27 19:57:29,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 161 transitions, 1427 flow [2024-06-27 19:57:29,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 161 transitions, 1387 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 19:57:29,886 INFO L231 Difference]: Finished difference. Result has 117 places, 130 transitions, 1070 flow [2024-06-27 19:57:29,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1070, PETRI_PLACES=117, PETRI_TRANSITIONS=130} [2024-06-27 19:57:29,887 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-27 19:57:29,887 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 130 transitions, 1070 flow [2024-06-27 19:57:29,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:29,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:29,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:29,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:57:29,888 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:29,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:29,888 INFO L85 PathProgramCache]: Analyzing trace with hash -368387934, now seen corresponding path program 1 times [2024-06-27 19:57:29,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:29,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870340650] [2024-06-27 19:57:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:29,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:30,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:30,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870340650] [2024-06-27 19:57:30,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870340650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:30,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:30,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:30,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585191564] [2024-06-27 19:57:30,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:30,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:30,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:30,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:31,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:31,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 130 transitions, 1070 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:31,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:31,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:31,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:31,827 INFO L124 PetriNetUnfolderBase]: 2460/3770 cut-off events. [2024-06-27 19:57:31,828 INFO L125 PetriNetUnfolderBase]: For 164291/164291 co-relation queries the response was YES. [2024-06-27 19:57:31,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26649 conditions, 3770 events. 2460/3770 cut-off events. For 164291/164291 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19035 event pairs, 779 based on Foata normal form. 2/3772 useless extension candidates. Maximal degree in co-relation 26599. Up to 3470 conditions per place. [2024-06-27 19:57:31,853 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 129 selfloop transitions, 25 changer transitions 0/161 dead transitions. [2024-06-27 19:57:31,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 161 transitions, 1460 flow [2024-06-27 19:57:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:31,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:57:31,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 19:57:31,855 INFO L175 Difference]: Start difference. First operand has 117 places, 130 transitions, 1070 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:57:31,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 161 transitions, 1460 flow [2024-06-27 19:57:32,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 161 transitions, 1349 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:32,012 INFO L231 Difference]: Finished difference. Result has 119 places, 130 transitions, 1021 flow [2024-06-27 19:57:32,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1021, PETRI_PLACES=119, PETRI_TRANSITIONS=130} [2024-06-27 19:57:32,012 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-27 19:57:32,012 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 130 transitions, 1021 flow [2024-06-27 19:57:32,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:32,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:32,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:32,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:57:32,013 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:32,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:32,013 INFO L85 PathProgramCache]: Analyzing trace with hash 989084456, now seen corresponding path program 2 times [2024-06-27 19:57:32,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:32,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418673816] [2024-06-27 19:57:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:32,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:33,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:33,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418673816] [2024-06-27 19:57:33,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418673816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:33,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:33,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:33,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560006913] [2024-06-27 19:57:33,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:33,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:33,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:33,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:33,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:33,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:33,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 130 transitions, 1021 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:33,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:33,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:33,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:34,051 INFO L124 PetriNetUnfolderBase]: 2356/3674 cut-off events. [2024-06-27 19:57:34,051 INFO L125 PetriNetUnfolderBase]: For 176357/176357 co-relation queries the response was YES. [2024-06-27 19:57:34,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26358 conditions, 3674 events. 2356/3674 cut-off events. For 176357/176357 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19021 event pairs, 750 based on Foata normal form. 4/3678 useless extension candidates. Maximal degree in co-relation 26307. Up to 3271 conditions per place. [2024-06-27 19:57:34,075 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 123 selfloop transitions, 21 changer transitions 0/163 dead transitions. [2024-06-27 19:57:34,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 163 transitions, 1447 flow [2024-06-27 19:57:34,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 19:57:34,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 19:57:34,076 INFO L175 Difference]: Start difference. First operand has 119 places, 130 transitions, 1021 flow. Second operand 8 states and 155 transitions. [2024-06-27 19:57:34,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 163 transitions, 1447 flow [2024-06-27 19:57:34,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 163 transitions, 1363 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:34,157 INFO L231 Difference]: Finished difference. Result has 119 places, 132 transitions, 1049 flow [2024-06-27 19:57:34,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1049, PETRI_PLACES=119, PETRI_TRANSITIONS=132} [2024-06-27 19:57:34,157 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-27 19:57:34,157 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 132 transitions, 1049 flow [2024-06-27 19:57:34,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:34,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:34,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:34,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:57:34,158 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:34,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:34,158 INFO L85 PathProgramCache]: Analyzing trace with hash -368267778, now seen corresponding path program 1 times [2024-06-27 19:57:34,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:34,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364262721] [2024-06-27 19:57:34,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:34,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:34,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:34,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364262721] [2024-06-27 19:57:34,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364262721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:34,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:34,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:34,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282520143] [2024-06-27 19:57:34,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:34,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:34,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:34,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:34,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:35,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:35,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 132 transitions, 1049 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:35,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:35,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:35,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:35,720 INFO L124 PetriNetUnfolderBase]: 2501/3839 cut-off events. [2024-06-27 19:57:35,720 INFO L125 PetriNetUnfolderBase]: For 189378/189378 co-relation queries the response was YES. [2024-06-27 19:57:35,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27803 conditions, 3839 events. 2501/3839 cut-off events. For 189378/189378 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 19490 event pairs, 761 based on Foata normal form. 4/3843 useless extension candidates. Maximal degree in co-relation 27751. Up to 3526 conditions per place. [2024-06-27 19:57:35,746 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 141 selfloop transitions, 23 changer transitions 0/171 dead transitions. [2024-06-27 19:57:35,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 171 transitions, 1539 flow [2024-06-27 19:57:35,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 19:57:35,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-27 19:57:35,748 INFO L175 Difference]: Start difference. First operand has 119 places, 132 transitions, 1049 flow. Second operand 9 states and 166 transitions. [2024-06-27 19:57:35,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 171 transitions, 1539 flow [2024-06-27 19:57:35,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 171 transitions, 1447 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:35,840 INFO L231 Difference]: Finished difference. Result has 122 places, 135 transitions, 1083 flow [2024-06-27 19:57:35,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1083, PETRI_PLACES=122, PETRI_TRANSITIONS=135} [2024-06-27 19:57:35,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-27 19:57:35,840 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 135 transitions, 1083 flow [2024-06-27 19:57:35,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:35,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:35,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:35,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:57:35,841 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:35,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:35,841 INFO L85 PathProgramCache]: Analyzing trace with hash -252981568, now seen corresponding path program 3 times [2024-06-27 19:57:35,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:35,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904774279] [2024-06-27 19:57:35,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:35,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:36,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:36,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904774279] [2024-06-27 19:57:36,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904774279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:36,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:36,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:36,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537193151] [2024-06-27 19:57:36,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:36,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:36,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:36,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:36,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:37,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:37,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 135 transitions, 1083 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:37,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:37,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:37,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:37,661 INFO L124 PetriNetUnfolderBase]: 2384/3732 cut-off events. [2024-06-27 19:57:37,661 INFO L125 PetriNetUnfolderBase]: For 201417/201417 co-relation queries the response was YES. [2024-06-27 19:57:37,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27941 conditions, 3732 events. 2384/3732 cut-off events. For 201417/201417 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 19465 event pairs, 727 based on Foata normal form. 4/3736 useless extension candidates. Maximal degree in co-relation 27888. Up to 3297 conditions per place. [2024-06-27 19:57:37,747 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 121 selfloop transitions, 26 changer transitions 0/166 dead transitions. [2024-06-27 19:57:37,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 166 transitions, 1517 flow [2024-06-27 19:57:37,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:37,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 19:57:37,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 19:57:37,748 INFO L175 Difference]: Start difference. First operand has 122 places, 135 transitions, 1083 flow. Second operand 8 states and 155 transitions. [2024-06-27 19:57:37,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 166 transitions, 1517 flow [2024-06-27 19:57:37,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 166 transitions, 1415 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:37,853 INFO L231 Difference]: Finished difference. Result has 123 places, 137 transitions, 1108 flow [2024-06-27 19:57:37,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1108, PETRI_PLACES=123, PETRI_TRANSITIONS=137} [2024-06-27 19:57:37,853 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-27 19:57:37,854 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 137 transitions, 1108 flow [2024-06-27 19:57:37,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:37,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:37,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:37,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:57:37,854 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:37,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:37,855 INFO L85 PathProgramCache]: Analyzing trace with hash 230536862, now seen corresponding path program 2 times [2024-06-27 19:57:37,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:37,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298167541] [2024-06-27 19:57:37,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:37,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:38,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:38,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298167541] [2024-06-27 19:57:38,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298167541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:38,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:38,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:38,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163237773] [2024-06-27 19:57:38,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:38,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:38,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:38,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:38,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:38,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:38,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 137 transitions, 1108 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:38,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:38,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:38,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:39,530 INFO L124 PetriNetUnfolderBase]: 2679/4108 cut-off events. [2024-06-27 19:57:39,530 INFO L125 PetriNetUnfolderBase]: For 229107/229117 co-relation queries the response was YES. [2024-06-27 19:57:39,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31326 conditions, 4108 events. 2679/4108 cut-off events. For 229107/229117 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 21061 event pairs, 729 based on Foata normal form. 14/4121 useless extension candidates. Maximal degree in co-relation 31272. Up to 3516 conditions per place. [2024-06-27 19:57:39,558 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 133 selfloop transitions, 47 changer transitions 0/187 dead transitions. [2024-06-27 19:57:39,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 187 transitions, 2078 flow [2024-06-27 19:57:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 19:57:39,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-27 19:57:39,559 INFO L175 Difference]: Start difference. First operand has 123 places, 137 transitions, 1108 flow. Second operand 9 states and 176 transitions. [2024-06-27 19:57:39,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 187 transitions, 2078 flow [2024-06-27 19:57:39,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 187 transitions, 1969 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:39,702 INFO L231 Difference]: Finished difference. Result has 128 places, 148 transitions, 1387 flow [2024-06-27 19:57:39,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1387, PETRI_PLACES=128, PETRI_TRANSITIONS=148} [2024-06-27 19:57:39,703 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-27 19:57:39,703 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 148 transitions, 1387 flow [2024-06-27 19:57:39,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:39,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:39,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:39,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:57:39,703 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:39,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:39,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1333762210, now seen corresponding path program 3 times [2024-06-27 19:57:39,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:39,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656999979] [2024-06-27 19:57:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:39,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:40,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:40,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656999979] [2024-06-27 19:57:40,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656999979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:40,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:40,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:40,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858425273] [2024-06-27 19:57:40,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:40,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:40,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:40,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:40,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:40,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:40,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 148 transitions, 1387 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:40,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:40,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:40,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:41,318 INFO L124 PetriNetUnfolderBase]: 2697/4146 cut-off events. [2024-06-27 19:57:41,318 INFO L125 PetriNetUnfolderBase]: For 246985/247005 co-relation queries the response was YES. [2024-06-27 19:57:41,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32999 conditions, 4146 events. 2697/4146 cut-off events. For 246985/247005 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 21390 event pairs, 712 based on Foata normal form. 28/4173 useless extension candidates. Maximal degree in co-relation 32942. Up to 3525 conditions per place. [2024-06-27 19:57:41,349 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 128 selfloop transitions, 53 changer transitions 0/188 dead transitions. [2024-06-27 19:57:41,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 188 transitions, 2079 flow [2024-06-27 19:57:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 19:57:41,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 19:57:41,351 INFO L175 Difference]: Start difference. First operand has 128 places, 148 transitions, 1387 flow. Second operand 9 states and 172 transitions. [2024-06-27 19:57:41,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 188 transitions, 2079 flow [2024-06-27 19:57:41,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 188 transitions, 1981 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 19:57:41,496 INFO L231 Difference]: Finished difference. Result has 133 places, 151 transitions, 1491 flow [2024-06-27 19:57:41,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1491, PETRI_PLACES=133, PETRI_TRANSITIONS=151} [2024-06-27 19:57:41,497 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-27 19:57:41,497 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 151 transitions, 1491 flow [2024-06-27 19:57:41,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:41,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:41,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:41,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:57:41,497 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:41,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:41,498 INFO L85 PathProgramCache]: Analyzing trace with hash -252803628, now seen corresponding path program 4 times [2024-06-27 19:57:41,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:41,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380933416] [2024-06-27 19:57:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:41,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:42,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:42,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380933416] [2024-06-27 19:57:42,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380933416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:42,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:42,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:42,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250356795] [2024-06-27 19:57:42,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:42,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:42,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:42,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:42,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:42,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:42,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 151 transitions, 1491 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:42,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:42,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:42,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:43,143 INFO L124 PetriNetUnfolderBase]: 2687/4132 cut-off events. [2024-06-27 19:57:43,143 INFO L125 PetriNetUnfolderBase]: For 253214/253244 co-relation queries the response was YES. [2024-06-27 19:57:43,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33220 conditions, 4132 events. 2687/4132 cut-off events. For 253214/253244 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 21284 event pairs, 715 based on Foata normal form. 34/4165 useless extension candidates. Maximal degree in co-relation 33161. Up to 3521 conditions per place. [2024-06-27 19:57:43,177 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 130 selfloop transitions, 51 changer transitions 0/188 dead transitions. [2024-06-27 19:57:43,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 188 transitions, 2103 flow [2024-06-27 19:57:43,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:43,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:43,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 19:57:43,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 19:57:43,179 INFO L175 Difference]: Start difference. First operand has 133 places, 151 transitions, 1491 flow. Second operand 9 states and 173 transitions. [2024-06-27 19:57:43,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 188 transitions, 2103 flow [2024-06-27 19:57:43,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 188 transitions, 1883 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:43,341 INFO L231 Difference]: Finished difference. Result has 136 places, 151 transitions, 1381 flow [2024-06-27 19:57:43,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1381, PETRI_PLACES=136, PETRI_TRANSITIONS=151} [2024-06-27 19:57:43,341 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-27 19:57:43,341 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 151 transitions, 1381 flow [2024-06-27 19:57:43,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:43,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:43,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:43,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:57:43,342 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:43,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:43,342 INFO L85 PathProgramCache]: Analyzing trace with hash -628443784, now seen corresponding path program 1 times [2024-06-27 19:57:43,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:43,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181854752] [2024-06-27 19:57:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:43,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:43,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:43,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181854752] [2024-06-27 19:57:43,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181854752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:43,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:43,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:57:43,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567016970] [2024-06-27 19:57:43,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:43,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:57:43,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:57:43,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:57:43,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:57:43,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 151 transitions, 1381 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:43,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:43,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:57:43,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:44,631 INFO L124 PetriNetUnfolderBase]: 2945/4407 cut-off events. [2024-06-27 19:57:44,631 INFO L125 PetriNetUnfolderBase]: For 269913/269923 co-relation queries the response was YES. [2024-06-27 19:57:44,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34648 conditions, 4407 events. 2945/4407 cut-off events. For 269913/269923 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 21743 event pairs, 845 based on Foata normal form. 1/4392 useless extension candidates. Maximal degree in co-relation 34588. Up to 4256 conditions per place. [2024-06-27 19:57:44,662 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 142 selfloop transitions, 16 changer transitions 0/173 dead transitions. [2024-06-27 19:57:44,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 173 transitions, 1883 flow [2024-06-27 19:57:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:57:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:57:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 19:57:44,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 19:57:44,663 INFO L175 Difference]: Start difference. First operand has 136 places, 151 transitions, 1381 flow. Second operand 6 states and 105 transitions. [2024-06-27 19:57:44,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 173 transitions, 1883 flow [2024-06-27 19:57:44,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 173 transitions, 1791 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:44,813 INFO L231 Difference]: Finished difference. Result has 135 places, 157 transitions, 1405 flow [2024-06-27 19:57:44,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1405, PETRI_PLACES=135, PETRI_TRANSITIONS=157} [2024-06-27 19:57:44,813 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-27 19:57:44,813 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 157 transitions, 1405 flow [2024-06-27 19:57:44,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:44,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:44,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:44,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:57:44,814 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:44,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:44,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2114098036, now seen corresponding path program 5 times [2024-06-27 19:57:44,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:44,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572136061] [2024-06-27 19:57:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:44,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:45,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:45,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572136061] [2024-06-27 19:57:45,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572136061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:45,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:45,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:45,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936341142] [2024-06-27 19:57:45,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:45,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:45,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:45,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:45,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:45,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:45,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 157 transitions, 1405 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:45,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:45,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:45,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:46,408 INFO L124 PetriNetUnfolderBase]: 2875/4402 cut-off events. [2024-06-27 19:57:46,408 INFO L125 PetriNetUnfolderBase]: For 294047/294073 co-relation queries the response was YES. [2024-06-27 19:57:46,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36261 conditions, 4402 events. 2875/4402 cut-off events. For 294047/294073 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 22967 event pairs, 747 based on Foata normal form. 13/4411 useless extension candidates. Maximal degree in co-relation 36200. Up to 3339 conditions per place. [2024-06-27 19:57:46,442 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 122 selfloop transitions, 84 changer transitions 0/215 dead transitions. [2024-06-27 19:57:46,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 215 transitions, 2905 flow [2024-06-27 19:57:46,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:46,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-27 19:57:46,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-27 19:57:46,444 INFO L175 Difference]: Start difference. First operand has 135 places, 157 transitions, 1405 flow. Second operand 9 states and 186 transitions. [2024-06-27 19:57:46,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 215 transitions, 2905 flow [2024-06-27 19:57:46,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 215 transitions, 2865 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 19:57:46,589 INFO L231 Difference]: Finished difference. Result has 144 places, 171 transitions, 1915 flow [2024-06-27 19:57:46,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1915, PETRI_PLACES=144, PETRI_TRANSITIONS=171} [2024-06-27 19:57:46,589 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-27 19:57:46,590 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 171 transitions, 1915 flow [2024-06-27 19:57:46,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:46,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:46,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:46,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:57:46,590 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:46,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:46,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2114104546, now seen corresponding path program 6 times [2024-06-27 19:57:46,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:46,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360133881] [2024-06-27 19:57:46,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:46,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:47,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:47,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360133881] [2024-06-27 19:57:47,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360133881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:47,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:47,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:47,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647303741] [2024-06-27 19:57:47,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:47,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:47,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:47,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:47,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:47,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:47,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 171 transitions, 1915 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:47,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:47,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:47,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:48,196 INFO L124 PetriNetUnfolderBase]: 2861/4394 cut-off events. [2024-06-27 19:57:48,197 INFO L125 PetriNetUnfolderBase]: For 312996/313022 co-relation queries the response was YES. [2024-06-27 19:57:48,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37794 conditions, 4394 events. 2861/4394 cut-off events. For 312996/313022 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22958 event pairs, 752 based on Foata normal form. 17/4407 useless extension candidates. Maximal degree in co-relation 37729. Up to 3335 conditions per place. [2024-06-27 19:57:48,232 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 120 selfloop transitions, 84 changer transitions 0/213 dead transitions. [2024-06-27 19:57:48,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 213 transitions, 2949 flow [2024-06-27 19:57:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 19:57:48,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-27 19:57:48,234 INFO L175 Difference]: Start difference. First operand has 144 places, 171 transitions, 1915 flow. Second operand 9 states and 183 transitions. [2024-06-27 19:57:48,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 213 transitions, 2949 flow [2024-06-27 19:57:48,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 213 transitions, 2675 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-27 19:57:48,475 INFO L231 Difference]: Finished difference. Result has 149 places, 171 transitions, 1819 flow [2024-06-27 19:57:48,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1819, PETRI_PLACES=149, PETRI_TRANSITIONS=171} [2024-06-27 19:57:48,475 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-27 19:57:48,475 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 171 transitions, 1819 flow [2024-06-27 19:57:48,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:48,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:48,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:48,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:57:48,476 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:48,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:48,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1519100768, now seen corresponding path program 7 times [2024-06-27 19:57:48,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:48,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069971894] [2024-06-27 19:57:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:48,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:49,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:49,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069971894] [2024-06-27 19:57:49,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069971894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:49,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:49,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:49,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888450151] [2024-06-27 19:57:49,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:49,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:49,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:49,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:49,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:49,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:49,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 171 transitions, 1819 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:49,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:49,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:49,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:50,064 INFO L124 PetriNetUnfolderBase]: 2915/4472 cut-off events. [2024-06-27 19:57:50,065 INFO L125 PetriNetUnfolderBase]: For 321761/321787 co-relation queries the response was YES. [2024-06-27 19:57:50,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38191 conditions, 4472 events. 2915/4472 cut-off events. For 321761/321787 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 23420 event pairs, 723 based on Foata normal form. 13/4481 useless extension candidates. Maximal degree in co-relation 38125. Up to 3371 conditions per place. [2024-06-27 19:57:50,100 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 115 selfloop transitions, 94 changer transitions 0/218 dead transitions. [2024-06-27 19:57:50,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 218 transitions, 3019 flow [2024-06-27 19:57:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 19:57:50,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-27 19:57:50,101 INFO L175 Difference]: Start difference. First operand has 149 places, 171 transitions, 1819 flow. Second operand 9 states and 181 transitions. [2024-06-27 19:57:50,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 218 transitions, 3019 flow [2024-06-27 19:57:50,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 218 transitions, 2860 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:50,280 INFO L231 Difference]: Finished difference. Result has 154 places, 179 transitions, 2091 flow [2024-06-27 19:57:50,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2091, PETRI_PLACES=154, PETRI_TRANSITIONS=179} [2024-06-27 19:57:50,280 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-27 19:57:50,280 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 179 transitions, 2091 flow [2024-06-27 19:57:50,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:50,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:50,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:50,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:57:50,281 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:50,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:50,281 INFO L85 PathProgramCache]: Analyzing trace with hash 2113920096, now seen corresponding path program 4 times [2024-06-27 19:57:50,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:50,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696777529] [2024-06-27 19:57:50,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:50,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:51,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:51,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696777529] [2024-06-27 19:57:51,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696777529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:51,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:51,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:51,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053816898] [2024-06-27 19:57:51,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:51,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:51,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:51,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:51,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:51,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:51,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 179 transitions, 2091 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:51,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:51,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:51,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:52,250 INFO L124 PetriNetUnfolderBase]: 2725/4248 cut-off events. [2024-06-27 19:57:52,250 INFO L125 PetriNetUnfolderBase]: For 339320/339361 co-relation queries the response was YES. [2024-06-27 19:57:52,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38031 conditions, 4248 events. 2725/4248 cut-off events. For 339320/339361 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 22710 event pairs, 723 based on Foata normal form. 13/4236 useless extension candidates. Maximal degree in co-relation 37962. Up to 3752 conditions per place. [2024-06-27 19:57:52,284 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 153 selfloop transitions, 33 changer transitions 0/207 dead transitions. [2024-06-27 19:57:52,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 207 transitions, 2601 flow [2024-06-27 19:57:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:52,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 19:57:52,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 19:57:52,285 INFO L175 Difference]: Start difference. First operand has 154 places, 179 transitions, 2091 flow. Second operand 8 states and 154 transitions. [2024-06-27 19:57:52,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 207 transitions, 2601 flow [2024-06-27 19:57:52,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 207 transitions, 2310 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:52,516 INFO L231 Difference]: Finished difference. Result has 155 places, 181 transitions, 1947 flow [2024-06-27 19:57:52,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1947, PETRI_PLACES=155, PETRI_TRANSITIONS=181} [2024-06-27 19:57:52,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-27 19:57:52,517 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 181 transitions, 1947 flow [2024-06-27 19:57:52,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:52,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:52,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:52,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:57:52,518 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:52,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:52,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2113925056, now seen corresponding path program 8 times [2024-06-27 19:57:52,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:52,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579069166] [2024-06-27 19:57:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:52,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:53,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:53,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579069166] [2024-06-27 19:57:53,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579069166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:53,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:53,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:53,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106528868] [2024-06-27 19:57:53,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:53,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:53,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:53,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:53,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:53,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:53,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 181 transitions, 1947 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:53,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:53,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:53,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:54,445 INFO L124 PetriNetUnfolderBase]: 2897/4446 cut-off events. [2024-06-27 19:57:54,445 INFO L125 PetriNetUnfolderBase]: For 346960/346986 co-relation queries the response was YES. [2024-06-27 19:57:54,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38592 conditions, 4446 events. 2897/4446 cut-off events. For 346960/346986 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 23227 event pairs, 742 based on Foata normal form. 13/4455 useless extension candidates. Maximal degree in co-relation 38522. Up to 3355 conditions per place. [2024-06-27 19:57:54,482 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 116 selfloop transitions, 98 changer transitions 0/223 dead transitions. [2024-06-27 19:57:54,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 223 transitions, 3067 flow [2024-06-27 19:57:54,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:54,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:54,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 19:57:54,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-27 19:57:54,483 INFO L175 Difference]: Start difference. First operand has 155 places, 181 transitions, 1947 flow. Second operand 9 states and 182 transitions. [2024-06-27 19:57:54,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 223 transitions, 3067 flow [2024-06-27 19:57:54,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 223 transitions, 2938 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:54,760 INFO L231 Difference]: Finished difference. Result has 158 places, 184 transitions, 2108 flow [2024-06-27 19:57:54,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2108, PETRI_PLACES=158, PETRI_TRANSITIONS=184} [2024-06-27 19:57:54,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-27 19:57:54,761 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 184 transitions, 2108 flow [2024-06-27 19:57:54,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:54,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:54,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:54,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:57:54,761 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:54,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:54,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1519107278, now seen corresponding path program 9 times [2024-06-27 19:57:54,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:54,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357771209] [2024-06-27 19:57:54,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:54,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:55,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:55,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357771209] [2024-06-27 19:57:55,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357771209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:55,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:55,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:55,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285601488] [2024-06-27 19:57:55,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:55,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:55,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:55,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:55,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:55,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:55,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 184 transitions, 2108 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:55,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:55,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:55,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:56,431 INFO L124 PetriNetUnfolderBase]: 2995/4589 cut-off events. [2024-06-27 19:57:56,432 INFO L125 PetriNetUnfolderBase]: For 373491/373517 co-relation queries the response was YES. [2024-06-27 19:57:56,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40912 conditions, 4589 events. 2995/4589 cut-off events. For 373491/373517 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 24110 event pairs, 730 based on Foata normal form. 17/4602 useless extension candidates. Maximal degree in co-relation 40841. Up to 3428 conditions per place. [2024-06-27 19:57:56,472 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 122 selfloop transitions, 100 changer transitions 0/231 dead transitions. [2024-06-27 19:57:56,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 231 transitions, 3368 flow [2024-06-27 19:57:56,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:56,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 19:57:56,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-27 19:57:56,473 INFO L175 Difference]: Start difference. First operand has 158 places, 184 transitions, 2108 flow. Second operand 9 states and 182 transitions. [2024-06-27 19:57:56,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 231 transitions, 3368 flow [2024-06-27 19:57:56,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 231 transitions, 3125 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:56,808 INFO L231 Difference]: Finished difference. Result has 162 places, 192 transitions, 2284 flow [2024-06-27 19:57:56,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2284, PETRI_PLACES=162, PETRI_TRANSITIONS=192} [2024-06-27 19:57:56,809 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-27 19:57:56,809 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 192 transitions, 2284 flow [2024-06-27 19:57:56,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:56,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:56,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:56,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:57:56,809 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:56,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:56,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1944687390, now seen corresponding path program 10 times [2024-06-27 19:57:56,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:56,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659064306] [2024-06-27 19:57:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:56,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:57,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:57,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659064306] [2024-06-27 19:57:57,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659064306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:57,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:57,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:57,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161833855] [2024-06-27 19:57:57,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:57,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:57,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:57,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:57,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:57,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:57,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 192 transitions, 2284 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:57,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:57,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:57,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:58,440 INFO L124 PetriNetUnfolderBase]: 2981/4571 cut-off events. [2024-06-27 19:57:58,440 INFO L125 PetriNetUnfolderBase]: For 382286/382312 co-relation queries the response was YES. [2024-06-27 19:57:58,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40758 conditions, 4571 events. 2981/4571 cut-off events. For 382286/382312 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 24023 event pairs, 710 based on Foata normal form. 17/4584 useless extension candidates. Maximal degree in co-relation 40685. Up to 3424 conditions per place. [2024-06-27 19:57:58,481 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 112 selfloop transitions, 108 changer transitions 0/229 dead transitions. [2024-06-27 19:57:58,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 229 transitions, 3184 flow [2024-06-27 19:57:58,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:58,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 19:57:58,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 19:57:58,485 INFO L175 Difference]: Start difference. First operand has 162 places, 192 transitions, 2284 flow. Second operand 9 states and 178 transitions. [2024-06-27 19:57:58,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 229 transitions, 3184 flow [2024-06-27 19:57:58,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 229 transitions, 2885 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-27 19:57:58,801 INFO L231 Difference]: Finished difference. Result has 166 places, 192 transitions, 2211 flow [2024-06-27 19:57:58,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2211, PETRI_PLACES=166, PETRI_TRANSITIONS=192} [2024-06-27 19:57:58,801 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-27 19:57:58,801 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 192 transitions, 2211 flow [2024-06-27 19:57:58,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:58,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:58,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:58,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:57:58,802 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:58,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:58,803 INFO L85 PathProgramCache]: Analyzing trace with hash -628055974, now seen corresponding path program 2 times [2024-06-27 19:57:58,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:58,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532633183] [2024-06-27 19:57:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:58,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:59,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:59,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532633183] [2024-06-27 19:57:59,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532633183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:59,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:59,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:57:59,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877469672] [2024-06-27 19:57:59,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:59,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:57:59,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:59,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:57:59,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:57:59,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:57:59,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 192 transitions, 2211 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:59,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:59,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:57:59,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:00,194 INFO L124 PetriNetUnfolderBase]: 3284/4909 cut-off events. [2024-06-27 19:58:00,194 INFO L125 PetriNetUnfolderBase]: For 393742/393769 co-relation queries the response was YES. [2024-06-27 19:58:00,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41626 conditions, 4909 events. 3284/4909 cut-off events. For 393742/393769 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 24649 event pairs, 891 based on Foata normal form. 13/4901 useless extension candidates. Maximal degree in co-relation 41552. Up to 4757 conditions per place. [2024-06-27 19:58:00,238 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 170 selfloop transitions, 16 changer transitions 0/201 dead transitions. [2024-06-27 19:58:00,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 201 transitions, 2605 flow [2024-06-27 19:58:00,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:58:00,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:58:00,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-27 19:58:00,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-27 19:58:00,239 INFO L175 Difference]: Start difference. First operand has 166 places, 192 transitions, 2211 flow. Second operand 6 states and 98 transitions. [2024-06-27 19:58:00,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 201 transitions, 2605 flow [2024-06-27 19:58:00,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 201 transitions, 2326 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 19:58:00,531 INFO L231 Difference]: Finished difference. Result has 163 places, 192 transitions, 1970 flow [2024-06-27 19:58:00,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1970, PETRI_PLACES=163, PETRI_TRANSITIONS=192} [2024-06-27 19:58:00,531 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 119 predicate places. [2024-06-27 19:58:00,531 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 192 transitions, 1970 flow [2024-06-27 19:58:00,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:00,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:00,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:00,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:58:00,532 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:00,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:00,532 INFO L85 PathProgramCache]: Analyzing trace with hash -622723912, now seen corresponding path program 1 times [2024-06-27 19:58:00,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:00,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99985127] [2024-06-27 19:58:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:00,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:01,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:01,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99985127] [2024-06-27 19:58:01,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99985127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:01,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:01,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:58:01,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504158507] [2024-06-27 19:58:01,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:01,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:58:01,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:01,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:58:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:58:01,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:01,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 192 transitions, 1970 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:01,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:01,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:01,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:01,816 INFO L124 PetriNetUnfolderBase]: 2964/4555 cut-off events. [2024-06-27 19:58:01,816 INFO L125 PetriNetUnfolderBase]: For 348450/348465 co-relation queries the response was YES. [2024-06-27 19:58:01,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36883 conditions, 4555 events. 2964/4555 cut-off events. For 348450/348465 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 23681 event pairs, 765 based on Foata normal form. 1/4535 useless extension candidates. Maximal degree in co-relation 36809. Up to 4305 conditions per place. [2024-06-27 19:58:01,857 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 179 selfloop transitions, 16 changer transitions 0/211 dead transitions. [2024-06-27 19:58:01,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 211 transitions, 2572 flow [2024-06-27 19:58:01,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:58:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:58:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 19:58:01,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-27 19:58:01,858 INFO L175 Difference]: Start difference. First operand has 163 places, 192 transitions, 1970 flow. Second operand 6 states and 107 transitions. [2024-06-27 19:58:01,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 211 transitions, 2572 flow [2024-06-27 19:58:02,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 211 transitions, 2528 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:58:02,210 INFO L231 Difference]: Finished difference. Result has 164 places, 198 transitions, 2058 flow [2024-06-27 19:58:02,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2058, PETRI_PLACES=164, PETRI_TRANSITIONS=198} [2024-06-27 19:58:02,211 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-27 19:58:02,211 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 198 transitions, 2058 flow [2024-06-27 19:58:02,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:02,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:02,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:02,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:58:02,212 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:02,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:02,212 INFO L85 PathProgramCache]: Analyzing trace with hash -5055720, now seen corresponding path program 1 times [2024-06-27 19:58:02,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:02,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101510901] [2024-06-27 19:58:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:02,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:03,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:03,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101510901] [2024-06-27 19:58:03,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101510901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:03,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:03,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:03,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843203086] [2024-06-27 19:58:03,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:03,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:03,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:03,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:03,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:03,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:03,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 198 transitions, 2058 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:03,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:03,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:03,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:04,384 INFO L124 PetriNetUnfolderBase]: 2947/4539 cut-off events. [2024-06-27 19:58:04,384 INFO L125 PetriNetUnfolderBase]: For 362334/362334 co-relation queries the response was YES. [2024-06-27 19:58:04,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37131 conditions, 4539 events. 2947/4539 cut-off events. For 362334/362334 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 23508 event pairs, 737 based on Foata normal form. 4/4533 useless extension candidates. Maximal degree in co-relation 37056. Up to 4223 conditions per place. [2024-06-27 19:58:04,419 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 200 selfloop transitions, 22 changer transitions 0/232 dead transitions. [2024-06-27 19:58:04,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 232 transitions, 2652 flow [2024-06-27 19:58:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:58:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:58:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 19:58:04,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 19:58:04,421 INFO L175 Difference]: Start difference. First operand has 164 places, 198 transitions, 2058 flow. Second operand 10 states and 172 transitions. [2024-06-27 19:58:04,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 232 transitions, 2652 flow [2024-06-27 19:58:04,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 232 transitions, 2602 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-27 19:58:04,814 INFO L231 Difference]: Finished difference. Result has 172 places, 200 transitions, 2133 flow [2024-06-27 19:58:04,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2008, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2133, PETRI_PLACES=172, PETRI_TRANSITIONS=200} [2024-06-27 19:58:04,815 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-27 19:58:04,815 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 200 transitions, 2133 flow [2024-06-27 19:58:04,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:04,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:04,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:04,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:58:04,815 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:04,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:04,816 INFO L85 PathProgramCache]: Analyzing trace with hash -615105352, now seen corresponding path program 2 times [2024-06-27 19:58:04,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:04,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050075655] [2024-06-27 19:58:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:04,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:05,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:05,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050075655] [2024-06-27 19:58:05,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050075655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:05,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:05,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:58:05,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450561695] [2024-06-27 19:58:05,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:05,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:58:05,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:05,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:58:05,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:58:05,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:05,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 200 transitions, 2133 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:05,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:05,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:05,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:06,127 INFO L124 PetriNetUnfolderBase]: 2953/4537 cut-off events. [2024-06-27 19:58:06,127 INFO L125 PetriNetUnfolderBase]: For 371740/371755 co-relation queries the response was YES. [2024-06-27 19:58:06,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37655 conditions, 4537 events. 2953/4537 cut-off events. For 371740/371755 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 23494 event pairs, 760 based on Foata normal form. 1/4517 useless extension candidates. Maximal degree in co-relation 37578. Up to 4302 conditions per place. [2024-06-27 19:58:06,166 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 182 selfloop transitions, 11 changer transitions 0/209 dead transitions. [2024-06-27 19:58:06,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 209 transitions, 2541 flow [2024-06-27 19:58:06,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:58:06,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:58:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 19:58:06,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147286821705424 [2024-06-27 19:58:06,167 INFO L175 Difference]: Start difference. First operand has 172 places, 200 transitions, 2133 flow. Second operand 6 states and 101 transitions. [2024-06-27 19:58:06,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 209 transitions, 2541 flow [2024-06-27 19:58:06,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 209 transitions, 2404 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-27 19:58:06,650 INFO L231 Difference]: Finished difference. Result has 170 places, 200 transitions, 2024 flow [2024-06-27 19:58:06,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1996, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2024, PETRI_PLACES=170, PETRI_TRANSITIONS=200} [2024-06-27 19:58:06,651 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-27 19:58:06,651 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 200 transitions, 2024 flow [2024-06-27 19:58:06,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:06,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:06,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:06,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:58:06,652 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:06,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:06,652 INFO L85 PathProgramCache]: Analyzing trace with hash -976385402, now seen corresponding path program 1 times [2024-06-27 19:58:06,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:06,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380622599] [2024-06-27 19:58:06,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:06,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:07,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:07,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380622599] [2024-06-27 19:58:07,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380622599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:07,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:07,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:07,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634206602] [2024-06-27 19:58:07,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:07,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:07,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:07,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:07,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:07,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:07,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 200 transitions, 2024 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:07,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:07,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:07,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:08,910 INFO L124 PetriNetUnfolderBase]: 3000/4591 cut-off events. [2024-06-27 19:58:08,910 INFO L125 PetriNetUnfolderBase]: For 446116/446136 co-relation queries the response was YES. [2024-06-27 19:58:08,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41351 conditions, 4591 events. 3000/4591 cut-off events. For 446116/446136 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 24034 event pairs, 593 based on Foata normal form. 9/4596 useless extension candidates. Maximal degree in co-relation 41273. Up to 4229 conditions per place. [2024-06-27 19:58:08,952 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 208 selfloop transitions, 19 changer transitions 0/238 dead transitions. [2024-06-27 19:58:08,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 238 transitions, 2634 flow [2024-06-27 19:58:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:58:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:58:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 19:58:08,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-27 19:58:08,953 INFO L175 Difference]: Start difference. First operand has 170 places, 200 transitions, 2024 flow. Second operand 9 states and 163 transitions. [2024-06-27 19:58:08,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 238 transitions, 2634 flow [2024-06-27 19:58:09,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 238 transitions, 2604 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:58:09,462 INFO L231 Difference]: Finished difference. Result has 174 places, 202 transitions, 2109 flow [2024-06-27 19:58:09,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2109, PETRI_PLACES=174, PETRI_TRANSITIONS=202} [2024-06-27 19:58:09,463 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-27 19:58:09,463 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 202 transitions, 2109 flow [2024-06-27 19:58:09,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:09,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:09,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:09,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:58:09,463 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:09,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:09,463 INFO L85 PathProgramCache]: Analyzing trace with hash -891394562, now seen corresponding path program 2 times [2024-06-27 19:58:09,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:09,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319093499] [2024-06-27 19:58:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:09,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:10,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:10,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319093499] [2024-06-27 19:58:10,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319093499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:10,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:10,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:10,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953943280] [2024-06-27 19:58:10,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:10,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:10,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:10,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:10,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:10,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 202 transitions, 2109 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:10,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:10,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:10,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:11,639 INFO L124 PetriNetUnfolderBase]: 3038/4661 cut-off events. [2024-06-27 19:58:11,640 INFO L125 PetriNetUnfolderBase]: For 468037/468057 co-relation queries the response was YES. [2024-06-27 19:58:11,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42696 conditions, 4661 events. 3038/4661 cut-off events. For 468037/468057 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24532 event pairs, 729 based on Foata normal form. 9/4670 useless extension candidates. Maximal degree in co-relation 42617. Up to 4229 conditions per place. [2024-06-27 19:58:11,684 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 204 selfloop transitions, 29 changer transitions 0/244 dead transitions. [2024-06-27 19:58:11,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 244 transitions, 2999 flow [2024-06-27 19:58:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:58:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:58:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 19:58:11,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 19:58:11,685 INFO L175 Difference]: Start difference. First operand has 174 places, 202 transitions, 2109 flow. Second operand 9 states and 168 transitions. [2024-06-27 19:58:11,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 244 transitions, 2999 flow [2024-06-27 19:58:12,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 244 transitions, 2902 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 19:58:12,076 INFO L231 Difference]: Finished difference. Result has 176 places, 206 transitions, 2221 flow [2024-06-27 19:58:12,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2221, PETRI_PLACES=176, PETRI_TRANSITIONS=206} [2024-06-27 19:58:12,076 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-27 19:58:12,076 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 206 transitions, 2221 flow [2024-06-27 19:58:12,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:12,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:12,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:12,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:58:12,077 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:12,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:12,077 INFO L85 PathProgramCache]: Analyzing trace with hash -974507577, now seen corresponding path program 1 times [2024-06-27 19:58:12,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:12,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323881751] [2024-06-27 19:58:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:12,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:13,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:13,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323881751] [2024-06-27 19:58:13,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323881751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:13,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:13,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:13,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077672242] [2024-06-27 19:58:13,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:13,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:13,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:13,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:13,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:13,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:13,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 206 transitions, 2221 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:13,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:13,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:13,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:14,199 INFO L124 PetriNetUnfolderBase]: 3035/4656 cut-off events. [2024-06-27 19:58:14,200 INFO L125 PetriNetUnfolderBase]: For 483393/483413 co-relation queries the response was YES. [2024-06-27 19:58:14,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42977 conditions, 4656 events. 3035/4656 cut-off events. For 483393/483413 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24536 event pairs, 711 based on Foata normal form. 7/4663 useless extension candidates. Maximal degree in co-relation 42897. Up to 4267 conditions per place. [2024-06-27 19:58:14,244 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 203 selfloop transitions, 31 changer transitions 0/245 dead transitions. [2024-06-27 19:58:14,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 245 transitions, 2873 flow [2024-06-27 19:58:14,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:58:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:58:14,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 19:58:14,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-27 19:58:14,246 INFO L175 Difference]: Start difference. First operand has 176 places, 206 transitions, 2221 flow. Second operand 9 states and 166 transitions. [2024-06-27 19:58:14,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 245 transitions, 2873 flow [2024-06-27 19:58:14,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 245 transitions, 2765 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 19:58:14,717 INFO L231 Difference]: Finished difference. Result has 180 places, 209 transitions, 2281 flow [2024-06-27 19:58:14,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2113, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2281, PETRI_PLACES=180, PETRI_TRANSITIONS=209} [2024-06-27 19:58:14,718 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-27 19:58:14,718 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 209 transitions, 2281 flow [2024-06-27 19:58:14,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:14,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:14,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:14,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:58:14,719 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:14,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1381760652, now seen corresponding path program 3 times [2024-06-27 19:58:14,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:14,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388914237] [2024-06-27 19:58:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:14,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:15,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:15,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388914237] [2024-06-27 19:58:15,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388914237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:15,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:15,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:15,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277320360] [2024-06-27 19:58:15,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:15,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:15,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:15,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:15,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:15,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:15,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 209 transitions, 2281 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:15,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:15,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:15,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:16,844 INFO L124 PetriNetUnfolderBase]: 3027/4644 cut-off events. [2024-06-27 19:58:16,844 INFO L125 PetriNetUnfolderBase]: For 497497/497517 co-relation queries the response was YES. [2024-06-27 19:58:16,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43173 conditions, 4644 events. 3027/4644 cut-off events. For 497497/497517 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24430 event pairs, 709 based on Foata normal form. 9/4653 useless extension candidates. Maximal degree in co-relation 43091. Up to 4264 conditions per place. [2024-06-27 19:58:16,891 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 207 selfloop transitions, 27 changer transitions 0/245 dead transitions. [2024-06-27 19:58:16,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 245 transitions, 2843 flow [2024-06-27 19:58:16,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:58:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:58:16,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 19:58:16,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-27 19:58:16,892 INFO L175 Difference]: Start difference. First operand has 180 places, 209 transitions, 2281 flow. Second operand 9 states and 165 transitions. [2024-06-27 19:58:16,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 245 transitions, 2843 flow [2024-06-27 19:58:17,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 245 transitions, 2673 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-27 19:58:17,425 INFO L231 Difference]: Finished difference. Result has 182 places, 209 transitions, 2173 flow [2024-06-27 19:58:17,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2173, PETRI_PLACES=182, PETRI_TRANSITIONS=209} [2024-06-27 19:58:17,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-27 19:58:17,426 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 209 transitions, 2173 flow [2024-06-27 19:58:17,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:17,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:17,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:17,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:58:17,427 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:17,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:17,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1992722402, now seen corresponding path program 1 times [2024-06-27 19:58:17,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:17,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915295222] [2024-06-27 19:58:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:17,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:18,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:18,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915295222] [2024-06-27 19:58:18,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915295222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:18,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:18,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:58:18,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650499853] [2024-06-27 19:58:18,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:18,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:58:18,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:18,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:58:18,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:58:18,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:58:18,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 209 transitions, 2173 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:18,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:18,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:58:18,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:19,055 INFO L124 PetriNetUnfolderBase]: 3325/4975 cut-off events. [2024-06-27 19:58:19,055 INFO L125 PetriNetUnfolderBase]: For 514341/514356 co-relation queries the response was YES. [2024-06-27 19:58:19,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43814 conditions, 4975 events. 3325/4975 cut-off events. For 514341/514356 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 25045 event pairs, 848 based on Foata normal form. 2/4956 useless extension candidates. Maximal degree in co-relation 43731. Up to 4750 conditions per place. [2024-06-27 19:58:19,102 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 196 selfloop transitions, 26 changer transitions 0/240 dead transitions. [2024-06-27 19:58:19,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 240 transitions, 2873 flow [2024-06-27 19:58:19,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:58:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:58:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 19:58:19,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 19:58:19,103 INFO L175 Difference]: Start difference. First operand has 182 places, 209 transitions, 2173 flow. Second operand 7 states and 126 transitions. [2024-06-27 19:58:19,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 240 transitions, 2873 flow [2024-06-27 19:58:19,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 240 transitions, 2813 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 19:58:19,513 INFO L231 Difference]: Finished difference. Result has 181 places, 215 transitions, 2262 flow [2024-06-27 19:58:19,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2113, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2262, PETRI_PLACES=181, PETRI_TRANSITIONS=215} [2024-06-27 19:58:19,514 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-27 19:58:19,514 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 215 transitions, 2262 flow [2024-06-27 19:58:19,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:19,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:19,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:19,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:58:19,514 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:19,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:19,515 INFO L85 PathProgramCache]: Analyzing trace with hash 747511436, now seen corresponding path program 4 times [2024-06-27 19:58:19,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:19,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417039270] [2024-06-27 19:58:19,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:19,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:20,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:20,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417039270] [2024-06-27 19:58:20,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417039270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:20,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:20,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:20,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549090972] [2024-06-27 19:58:20,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:20,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:20,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:20,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:20,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:20,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:20,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 215 transitions, 2262 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:20,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:20,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:20,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:21,734 INFO L124 PetriNetUnfolderBase]: 3070/4701 cut-off events. [2024-06-27 19:58:21,735 INFO L125 PetriNetUnfolderBase]: For 535642/535662 co-relation queries the response was YES. [2024-06-27 19:58:21,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44414 conditions, 4701 events. 3070/4701 cut-off events. For 535642/535662 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 24706 event pairs, 704 based on Foata normal form. 9/4710 useless extension candidates. Maximal degree in co-relation 44330. Up to 4246 conditions per place. [2024-06-27 19:58:21,782 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 200 selfloop transitions, 38 changer transitions 0/251 dead transitions. [2024-06-27 19:58:21,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 251 transitions, 2902 flow [2024-06-27 19:58:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:58:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:58:21,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 19:58:21,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-27 19:58:21,784 INFO L175 Difference]: Start difference. First operand has 181 places, 215 transitions, 2262 flow. Second operand 9 states and 167 transitions. [2024-06-27 19:58:21,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 251 transitions, 2902 flow [2024-06-27 19:58:22,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 251 transitions, 2842 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 19:58:22,367 INFO L231 Difference]: Finished difference. Result has 187 places, 217 transitions, 2363 flow [2024-06-27 19:58:22,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2363, PETRI_PLACES=187, PETRI_TRANSITIONS=217} [2024-06-27 19:58:22,368 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-27 19:58:22,368 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 217 transitions, 2363 flow [2024-06-27 19:58:22,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:22,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:22,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:22,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:58:22,368 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:22,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:22,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1608760668, now seen corresponding path program 5 times [2024-06-27 19:58:22,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:22,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665783741] [2024-06-27 19:58:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:22,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:23,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:23,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665783741] [2024-06-27 19:58:23,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665783741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:23,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:23,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:23,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937308392] [2024-06-27 19:58:23,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:23,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:23,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:23,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:23,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 217 transitions, 2363 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:23,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:23,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:23,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:24,622 INFO L124 PetriNetUnfolderBase]: 3112/4767 cut-off events. [2024-06-27 19:58:24,622 INFO L125 PetriNetUnfolderBase]: For 564468/564488 co-relation queries the response was YES. [2024-06-27 19:58:24,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45855 conditions, 4767 events. 3112/4767 cut-off events. For 564468/564488 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 25126 event pairs, 706 based on Foata normal form. 9/4776 useless extension candidates. Maximal degree in co-relation 45769. Up to 4247 conditions per place. [2024-06-27 19:58:24,664 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 201 selfloop transitions, 43 changer transitions 0/257 dead transitions. [2024-06-27 19:58:24,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 257 transitions, 3305 flow [2024-06-27 19:58:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:58:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:58:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 19:58:24,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 19:58:24,666 INFO L175 Difference]: Start difference. First operand has 187 places, 217 transitions, 2363 flow. Second operand 9 states and 169 transitions. [2024-06-27 19:58:24,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 257 transitions, 3305 flow [2024-06-27 19:58:25,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 257 transitions, 3162 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 19:58:25,060 INFO L231 Difference]: Finished difference. Result has 189 places, 221 transitions, 2473 flow [2024-06-27 19:58:25,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2220, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2473, PETRI_PLACES=189, PETRI_TRANSITIONS=221} [2024-06-27 19:58:25,060 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-27 19:58:25,060 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 221 transitions, 2473 flow [2024-06-27 19:58:25,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:25,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:25,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:25,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:58:25,061 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:25,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:25,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1603250418, now seen corresponding path program 6 times [2024-06-27 19:58:25,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:25,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958769542] [2024-06-27 19:58:25,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:25,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:26,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:26,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958769542] [2024-06-27 19:58:26,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958769542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:26,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:26,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:26,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9275366] [2024-06-27 19:58:26,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:26,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:26,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:26,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:26,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:26,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:26,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 221 transitions, 2473 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:26,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:26,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:26,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:27,279 INFO L124 PetriNetUnfolderBase]: 3104/4750 cut-off events. [2024-06-27 19:58:27,280 INFO L125 PetriNetUnfolderBase]: For 577730/577750 co-relation queries the response was YES. [2024-06-27 19:58:27,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45891 conditions, 4750 events. 3104/4750 cut-off events. For 577730/577750 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 24955 event pairs, 699 based on Foata normal form. 9/4754 useless extension candidates. Maximal degree in co-relation 45804. Up to 4300 conditions per place. [2024-06-27 19:58:27,328 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 202 selfloop transitions, 40 changer transitions 0/255 dead transitions. [2024-06-27 19:58:27,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 255 transitions, 3047 flow [2024-06-27 19:58:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:58:27,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:58:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 19:58:27,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-27 19:58:27,329 INFO L175 Difference]: Start difference. First operand has 189 places, 221 transitions, 2473 flow. Second operand 9 states and 166 transitions. [2024-06-27 19:58:27,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 255 transitions, 3047 flow [2024-06-27 19:58:27,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 255 transitions, 2863 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-27 19:58:27,959 INFO L231 Difference]: Finished difference. Result has 193 places, 221 transitions, 2376 flow [2024-06-27 19:58:27,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2289, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2376, PETRI_PLACES=193, PETRI_TRANSITIONS=221} [2024-06-27 19:58:27,960 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-27 19:58:27,960 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 221 transitions, 2376 flow [2024-06-27 19:58:27,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:27,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:27,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:27,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:58:27,961 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:27,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:27,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1603034937, now seen corresponding path program 1 times [2024-06-27 19:58:27,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:27,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988675442] [2024-06-27 19:58:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:27,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:29,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:29,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988675442] [2024-06-27 19:58:29,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988675442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:29,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:29,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:29,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837152760] [2024-06-27 19:58:29,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:29,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:29,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:29,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:29,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:29,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:58:29,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 221 transitions, 2376 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) [2024-06-27 19:58:29,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:29,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:58:29,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:30,126 INFO L124 PetriNetUnfolderBase]: 3388/5073 cut-off events. [2024-06-27 19:58:30,126 INFO L125 PetriNetUnfolderBase]: For 591363/591363 co-relation queries the response was YES. [2024-06-27 19:58:30,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46282 conditions, 5073 events. 3388/5073 cut-off events. For 591363/591363 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 25567 event pairs, 718 based on Foata normal form. 6/5079 useless extension candidates. Maximal degree in co-relation 46193. Up to 4446 conditions per place. [2024-06-27 19:58:30,181 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 194 selfloop transitions, 70 changer transitions 0/275 dead transitions. [2024-06-27 19:58:30,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 275 transitions, 3132 flow [2024-06-27 19:58:30,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:58:30,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:58:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 19:58:30,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-06-27 19:58:30,183 INFO L175 Difference]: Start difference. First operand has 193 places, 221 transitions, 2376 flow. Second operand 10 states and 178 transitions. [2024-06-27 19:58:30,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 275 transitions, 3132 flow [2024-06-27 19:58:30,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 275 transitions, 2988 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 19:58:31,000 INFO L231 Difference]: Finished difference. Result has 196 places, 235 transitions, 2519 flow [2024-06-27 19:58:31,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2232, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2519, PETRI_PLACES=196, PETRI_TRANSITIONS=235} [2024-06-27 19:58:31,001 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-27 19:58:31,001 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 235 transitions, 2519 flow [2024-06-27 19:58:31,002 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) [2024-06-27 19:58:31,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:31,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:31,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:58:31,002 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:31,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:31,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1172360964, now seen corresponding path program 2 times [2024-06-27 19:58:31,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:31,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532267050] [2024-06-27 19:58:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:31,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:31,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:31,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532267050] [2024-06-27 19:58:31,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532267050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:31,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:31,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:58:31,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957657094] [2024-06-27 19:58:31,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:31,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:58:31,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:31,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:58:31,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:58:31,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:58:31,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 235 transitions, 2519 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:31,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:31,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:58:31,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:32,780 INFO L124 PetriNetUnfolderBase]: 3355/5029 cut-off events. [2024-06-27 19:58:32,780 INFO L125 PetriNetUnfolderBase]: For 602060/602075 co-relation queries the response was YES. [2024-06-27 19:58:32,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46393 conditions, 5029 events. 3355/5029 cut-off events. For 602060/602075 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 25444 event pairs, 790 based on Foata normal form. 2/5010 useless extension candidates. Maximal degree in co-relation 46302. Up to 4780 conditions per place. [2024-06-27 19:58:32,832 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 209 selfloop transitions, 28 changer transitions 0/258 dead transitions. [2024-06-27 19:58:32,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 258 transitions, 3205 flow [2024-06-27 19:58:32,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:58:32,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:58:32,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 19:58:32,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-27 19:58:32,833 INFO L175 Difference]: Start difference. First operand has 196 places, 235 transitions, 2519 flow. Second operand 7 states and 122 transitions. [2024-06-27 19:58:32,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 258 transitions, 3205 flow [2024-06-27 19:58:33,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 258 transitions, 3046 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 19:58:33,458 INFO L231 Difference]: Finished difference. Result has 195 places, 238 transitions, 2464 flow [2024-06-27 19:58:33,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2360, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2464, PETRI_PLACES=195, PETRI_TRANSITIONS=238} [2024-06-27 19:58:33,459 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-27 19:58:33,459 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 238 transitions, 2464 flow [2024-06-27 19:58:33,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:33,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:33,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:33,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:58:33,460 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:33,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:33,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1993080886, now seen corresponding path program 1 times [2024-06-27 19:58:33,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:33,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752801867] [2024-06-27 19:58:33,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:33,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:34,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:34,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752801867] [2024-06-27 19:58:34,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752801867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:34,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:34,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:58:34,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282612729] [2024-06-27 19:58:34,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:34,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:58:34,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:34,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:58:34,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:58:34,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:58:34,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 238 transitions, 2464 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:34,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:34,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:58:34,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:35,140 INFO L124 PetriNetUnfolderBase]: 3360/5036 cut-off events. [2024-06-27 19:58:35,140 INFO L125 PetriNetUnfolderBase]: For 617989/618004 co-relation queries the response was YES. [2024-06-27 19:58:35,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46572 conditions, 5036 events. 3360/5036 cut-off events. For 617989/618004 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 25395 event pairs, 790 based on Foata normal form. 1/5016 useless extension candidates. Maximal degree in co-relation 46479. Up to 4828 conditions per place. [2024-06-27 19:58:35,192 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 220 selfloop transitions, 23 changer transitions 0/264 dead transitions. [2024-06-27 19:58:35,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 264 transitions, 3208 flow [2024-06-27 19:58:35,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:58:35,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:58:35,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 19:58:35,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 19:58:35,193 INFO L175 Difference]: Start difference. First operand has 195 places, 238 transitions, 2464 flow. Second operand 7 states and 119 transitions. [2024-06-27 19:58:35,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 264 transitions, 3208 flow [2024-06-27 19:58:35,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 264 transitions, 3140 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 19:58:35,973 INFO L231 Difference]: Finished difference. Result has 199 places, 247 transitions, 2564 flow [2024-06-27 19:58:35,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2564, PETRI_PLACES=199, PETRI_TRANSITIONS=247} [2024-06-27 19:58:35,973 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-27 19:58:35,974 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 247 transitions, 2564 flow [2024-06-27 19:58:35,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:35,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:35,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:35,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:58:35,974 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:35,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:35,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1096515884, now seen corresponding path program 7 times [2024-06-27 19:58:35,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:35,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512455881] [2024-06-27 19:58:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:35,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:37,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:37,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512455881] [2024-06-27 19:58:37,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512455881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:37,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:37,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:37,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225667380] [2024-06-27 19:58:37,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:37,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:37,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:37,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:37,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:37,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:37,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 247 transitions, 2564 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:37,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:37,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:37,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:38,258 INFO L124 PetriNetUnfolderBase]: 3111/4773 cut-off events. [2024-06-27 19:58:38,258 INFO L125 PetriNetUnfolderBase]: For 644270/644296 co-relation queries the response was YES. [2024-06-27 19:58:38,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46733 conditions, 4773 events. 3111/4773 cut-off events. For 644270/644296 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 25075 event pairs, 645 based on Foata normal form. 13/4786 useless extension candidates. Maximal degree in co-relation 46638. Up to 4181 conditions per place. [2024-06-27 19:58:38,307 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 206 selfloop transitions, 59 changer transitions 0/280 dead transitions. [2024-06-27 19:58:38,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 280 transitions, 3258 flow [2024-06-27 19:58:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:58:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:58:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 19:58:38,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-27 19:58:38,308 INFO L175 Difference]: Start difference. First operand has 199 places, 247 transitions, 2564 flow. Second operand 9 states and 167 transitions. [2024-06-27 19:58:38,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 280 transitions, 3258 flow [2024-06-27 19:58:39,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 280 transitions, 3208 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-27 19:58:39,092 INFO L231 Difference]: Finished difference. Result has 206 places, 249 transitions, 2725 flow [2024-06-27 19:58:39,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2725, PETRI_PLACES=206, PETRI_TRANSITIONS=249} [2024-06-27 19:58:39,093 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-27 19:58:39,093 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 249 transitions, 2725 flow [2024-06-27 19:58:39,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:39,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:39,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:39,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:58:39,094 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:39,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:39,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1096512164, now seen corresponding path program 8 times [2024-06-27 19:58:39,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:39,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326596820] [2024-06-27 19:58:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:39,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:40,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:40,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326596820] [2024-06-27 19:58:40,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326596820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:40,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:40,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:40,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356575235] [2024-06-27 19:58:40,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:40,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:40,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:40,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:40,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:40,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:40,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 249 transitions, 2725 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:40,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:40,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:40,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:41,335 INFO L124 PetriNetUnfolderBase]: 3128/4800 cut-off events. [2024-06-27 19:58:41,336 INFO L125 PetriNetUnfolderBase]: For 668201/668227 co-relation queries the response was YES. [2024-06-27 19:58:41,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47752 conditions, 4800 events. 3128/4800 cut-off events. For 668201/668227 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 25252 event pairs, 645 based on Foata normal form. 13/4813 useless extension candidates. Maximal degree in co-relation 47654. Up to 4138 conditions per place. [2024-06-27 19:58:41,387 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 207 selfloop transitions, 64 changer transitions 0/286 dead transitions. [2024-06-27 19:58:41,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 286 transitions, 3749 flow [2024-06-27 19:58:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:58:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:58:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 19:58:41,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 19:58:41,496 INFO L175 Difference]: Start difference. First operand has 206 places, 249 transitions, 2725 flow. Second operand 9 states and 169 transitions. [2024-06-27 19:58:41,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 286 transitions, 3749 flow [2024-06-27 19:58:42,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 286 transitions, 3556 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 19:58:42,174 INFO L231 Difference]: Finished difference. Result has 208 places, 253 transitions, 2843 flow [2024-06-27 19:58:42,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2843, PETRI_PLACES=208, PETRI_TRANSITIONS=253} [2024-06-27 19:58:42,174 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-27 19:58:42,174 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 253 transitions, 2843 flow [2024-06-27 19:58:42,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:42,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:42,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:42,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:58:42,175 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:42,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:42,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1112525518, now seen corresponding path program 9 times [2024-06-27 19:58:42,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:42,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835408688] [2024-06-27 19:58:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:42,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:43,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:43,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835408688] [2024-06-27 19:58:43,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835408688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:43,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:43,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:43,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551717143] [2024-06-27 19:58:43,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:43,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:43,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:43,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:43,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:43,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:43,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 253 transitions, 2843 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:43,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:43,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:43,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:44,594 INFO L124 PetriNetUnfolderBase]: 3145/4827 cut-off events. [2024-06-27 19:58:44,594 INFO L125 PetriNetUnfolderBase]: For 690717/690743 co-relation queries the response was YES. [2024-06-27 19:58:44,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48366 conditions, 4827 events. 3145/4827 cut-off events. For 690717/690743 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25445 event pairs, 645 based on Foata normal form. 13/4840 useless extension candidates. Maximal degree in co-relation 48267. Up to 4235 conditions per place. [2024-06-27 19:58:44,647 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 58 changer transitions 0/287 dead transitions. [2024-06-27 19:58:44,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 287 transitions, 3563 flow [2024-06-27 19:58:44,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:58:44,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:58:44,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 19:58:44,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 19:58:44,649 INFO L175 Difference]: Start difference. First operand has 208 places, 253 transitions, 2843 flow. Second operand 9 states and 169 transitions. [2024-06-27 19:58:44,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 287 transitions, 3563 flow [2024-06-27 19:58:45,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 287 transitions, 3371 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-27 19:58:45,213 INFO L231 Difference]: Finished difference. Result has 212 places, 255 transitions, 2868 flow [2024-06-27 19:58:45,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2868, PETRI_PLACES=212, PETRI_TRANSITIONS=255} [2024-06-27 19:58:45,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-27 19:58:45,214 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 255 transitions, 2868 flow [2024-06-27 19:58:45,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:45,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:45,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:45,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:58:45,215 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:45,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:45,215 INFO L85 PathProgramCache]: Analyzing trace with hash -346244535, now seen corresponding path program 2 times [2024-06-27 19:58:45,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:45,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956177681] [2024-06-27 19:58:45,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:45,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:46,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:46,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956177681] [2024-06-27 19:58:46,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956177681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:46,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:46,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:46,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691844611] [2024-06-27 19:58:46,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:46,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:46,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:46,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:46,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:46,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:58:46,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 255 transitions, 2868 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) [2024-06-27 19:58:46,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:46,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:58:46,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:47,512 INFO L124 PetriNetUnfolderBase]: 3431/5147 cut-off events. [2024-06-27 19:58:47,512 INFO L125 PetriNetUnfolderBase]: For 706377/706383 co-relation queries the response was YES. [2024-06-27 19:58:47,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49445 conditions, 5147 events. 3431/5147 cut-off events. For 706377/706383 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 26017 event pairs, 737 based on Foata normal form. 10/5157 useless extension candidates. Maximal degree in co-relation 49344. Up to 4053 conditions per place. [2024-06-27 19:58:47,568 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 180 selfloop transitions, 116 changer transitions 0/308 dead transitions. [2024-06-27 19:58:47,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 308 transitions, 3672 flow [2024-06-27 19:58:47,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:58:47,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:58:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 19:58:47,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 19:58:47,570 INFO L175 Difference]: Start difference. First operand has 212 places, 255 transitions, 2868 flow. Second operand 10 states and 185 transitions. [2024-06-27 19:58:47,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 308 transitions, 3672 flow [2024-06-27 19:58:48,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 308 transitions, 3439 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-27 19:58:48,535 INFO L231 Difference]: Finished difference. Result has 217 places, 269 transitions, 3021 flow [2024-06-27 19:58:48,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2635, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3021, PETRI_PLACES=217, PETRI_TRANSITIONS=269} [2024-06-27 19:58:48,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-27 19:58:48,535 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 269 transitions, 3021 flow [2024-06-27 19:58:48,536 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) [2024-06-27 19:58:48,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:48,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:48,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:58:48,536 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:48,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:48,537 INFO L85 PathProgramCache]: Analyzing trace with hash -412473424, now seen corresponding path program 10 times [2024-06-27 19:58:48,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:48,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936058574] [2024-06-27 19:58:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:48,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:49,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:49,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936058574] [2024-06-27 19:58:49,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936058574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:49,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:49,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:49,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552089451] [2024-06-27 19:58:49,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:49,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:49,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:49,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:49,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:49,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:49,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 269 transitions, 3021 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:49,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:49,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:49,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:50,777 INFO L124 PetriNetUnfolderBase]: 3145/4813 cut-off events. [2024-06-27 19:58:50,777 INFO L125 PetriNetUnfolderBase]: For 707446/707476 co-relation queries the response was YES. [2024-06-27 19:58:50,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48375 conditions, 4813 events. 3145/4813 cut-off events. For 707446/707476 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 25193 event pairs, 640 based on Foata normal form. 13/4826 useless extension candidates. Maximal degree in co-relation 48271. Up to 4221 conditions per place. [2024-06-27 19:58:50,832 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 222 selfloop transitions, 62 changer transitions 0/300 dead transitions. [2024-06-27 19:58:50,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 300 transitions, 3671 flow [2024-06-27 19:58:50,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:58:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:58:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 19:58:50,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-27 19:58:50,834 INFO L175 Difference]: Start difference. First operand has 217 places, 269 transitions, 3021 flow. Second operand 9 states and 166 transitions. [2024-06-27 19:58:50,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 300 transitions, 3671 flow [2024-06-27 19:58:51,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 300 transitions, 3456 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 19:58:51,769 INFO L231 Difference]: Finished difference. Result has 219 places, 269 transitions, 2937 flow [2024-06-27 19:58:51,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2806, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2937, PETRI_PLACES=219, PETRI_TRANSITIONS=269} [2024-06-27 19:58:51,769 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-27 19:58:51,769 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 269 transitions, 2937 flow [2024-06-27 19:58:51,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:51,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:51,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:51,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:58:51,770 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:51,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:51,770 INFO L85 PathProgramCache]: Analyzing trace with hash -412257943, now seen corresponding path program 3 times [2024-06-27 19:58:51,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:51,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590099671] [2024-06-27 19:58:51,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:51,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:52,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:52,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590099671] [2024-06-27 19:58:52,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590099671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:52,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:52,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:52,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143947007] [2024-06-27 19:58:52,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:52,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:52,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:52,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:52,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:52,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:58:52,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 269 transitions, 2937 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) [2024-06-27 19:58:52,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:52,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:58:52,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:53,951 INFO L124 PetriNetUnfolderBase]: 3402/5104 cut-off events. [2024-06-27 19:58:53,951 INFO L125 PetriNetUnfolderBase]: For 724798/724804 co-relation queries the response was YES. [2024-06-27 19:58:53,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49526 conditions, 5104 events. 3402/5104 cut-off events. For 724798/724804 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 25797 event pairs, 705 based on Foata normal form. 10/5114 useless extension candidates. Maximal degree in co-relation 49420. Up to 4020 conditions per place. [2024-06-27 19:58:54,004 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 178 selfloop transitions, 124 changer transitions 0/314 dead transitions. [2024-06-27 19:58:54,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 314 transitions, 3718 flow [2024-06-27 19:58:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:58:54,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:58:54,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 19:58:54,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-27 19:58:54,005 INFO L175 Difference]: Start difference. First operand has 219 places, 269 transitions, 2937 flow. Second operand 10 states and 184 transitions. [2024-06-27 19:58:54,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 314 transitions, 3718 flow [2024-06-27 19:58:55,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 314 transitions, 3515 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 19:58:55,032 INFO L231 Difference]: Finished difference. Result has 222 places, 275 transitions, 3059 flow [2024-06-27 19:58:55,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2734, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3059, PETRI_PLACES=222, PETRI_TRANSITIONS=275} [2024-06-27 19:58:55,033 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-27 19:58:55,033 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 275 transitions, 3059 flow [2024-06-27 19:58:55,033 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) [2024-06-27 19:58:55,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:55,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:55,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:58:55,034 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:55,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:55,034 INFO L85 PathProgramCache]: Analyzing trace with hash -145155285, now seen corresponding path program 4 times [2024-06-27 19:58:55,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:55,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536505790] [2024-06-27 19:58:55,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:55,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:56,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:56,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536505790] [2024-06-27 19:58:56,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536505790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:56,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:56,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:56,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663193032] [2024-06-27 19:58:56,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:56,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:56,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:56,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:56,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:56,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:58:56,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 275 transitions, 3059 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) [2024-06-27 19:58:56,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:56,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:58:56,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:57,266 INFO L124 PetriNetUnfolderBase]: 3468/5200 cut-off events. [2024-06-27 19:58:57,267 INFO L125 PetriNetUnfolderBase]: For 746768/746774 co-relation queries the response was YES. [2024-06-27 19:58:57,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50791 conditions, 5200 events. 3468/5200 cut-off events. For 746768/746774 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 26273 event pairs, 685 based on Foata normal form. 10/5210 useless extension candidates. Maximal degree in co-relation 50683. Up to 4104 conditions per place. [2024-06-27 19:58:57,323 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 174 selfloop transitions, 137 changer transitions 0/323 dead transitions. [2024-06-27 19:58:57,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 323 transitions, 3953 flow [2024-06-27 19:58:57,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:58:57,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:58:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 19:58:57,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-27 19:58:57,324 INFO L175 Difference]: Start difference. First operand has 222 places, 275 transitions, 3059 flow. Second operand 10 states and 183 transitions. [2024-06-27 19:58:57,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 323 transitions, 3953 flow [2024-06-27 19:58:58,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 323 transitions, 3649 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:58:58,305 INFO L231 Difference]: Finished difference. Result has 225 places, 285 transitions, 3217 flow [2024-06-27 19:58:58,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3217, PETRI_PLACES=225, PETRI_TRANSITIONS=285} [2024-06-27 19:58:58,305 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-27 19:58:58,306 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 285 transitions, 3217 flow [2024-06-27 19:58:58,306 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) [2024-06-27 19:58:58,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:58,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:58,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:58:58,306 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:58,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:58,306 INFO L85 PathProgramCache]: Analyzing trace with hash -156737337, now seen corresponding path program 5 times [2024-06-27 19:58:58,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:58,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345840080] [2024-06-27 19:58:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:58,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:59,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:59,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345840080] [2024-06-27 19:58:59,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345840080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:59,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:59,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:59,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679871224] [2024-06-27 19:58:59,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:59,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:59,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:59,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:59,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:59,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:58:59,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 285 transitions, 3217 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) [2024-06-27 19:58:59,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:59,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:58:59,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:00,593 INFO L124 PetriNetUnfolderBase]: 3457/5180 cut-off events. [2024-06-27 19:59:00,593 INFO L125 PetriNetUnfolderBase]: For 756108/756118 co-relation queries the response was YES. [2024-06-27 19:59:00,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51051 conditions, 5180 events. 3457/5180 cut-off events. For 756108/756118 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 26218 event pairs, 743 based on Foata normal form. 12/5192 useless extension candidates. Maximal degree in co-relation 50941. Up to 4781 conditions per place. [2024-06-27 19:59:00,647 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 252 selfloop transitions, 76 changer transitions 0/340 dead transitions. [2024-06-27 19:59:00,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 340 transitions, 4204 flow [2024-06-27 19:59:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:59:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:59:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 19:59:00,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3890063424947146 [2024-06-27 19:59:00,648 INFO L175 Difference]: Start difference. First operand has 225 places, 285 transitions, 3217 flow. Second operand 11 states and 184 transitions. [2024-06-27 19:59:00,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 340 transitions, 4204 flow [2024-06-27 19:59:01,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 340 transitions, 3806 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 19:59:01,822 INFO L231 Difference]: Finished difference. Result has 231 places, 305 transitions, 3289 flow [2024-06-27 19:59:01,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2873, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3289, PETRI_PLACES=231, PETRI_TRANSITIONS=305} [2024-06-27 19:59:01,823 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-27 19:59:01,823 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 305 transitions, 3289 flow [2024-06-27 19:59:01,823 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) [2024-06-27 19:59:01,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:01,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:01,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:59:01,823 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:01,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:01,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1888104300, now seen corresponding path program 2 times [2024-06-27 19:59:01,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:01,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221128923] [2024-06-27 19:59:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:01,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:02,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:02,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221128923] [2024-06-27 19:59:02,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221128923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:02,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:02,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:59:02,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799706027] [2024-06-27 19:59:02,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:02,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:59:02,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:02,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:59:02,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:59:02,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:59:02,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 305 transitions, 3289 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:02,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:02,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:59:02,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:03,742 INFO L124 PetriNetUnfolderBase]: 3411/5121 cut-off events. [2024-06-27 19:59:03,742 INFO L125 PetriNetUnfolderBase]: For 767091/767116 co-relation queries the response was YES. [2024-06-27 19:59:03,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50351 conditions, 5121 events. 3411/5121 cut-off events. For 767091/767116 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 26045 event pairs, 774 based on Foata normal form. 11/5111 useless extension candidates. Maximal degree in co-relation 50238. Up to 4894 conditions per place. [2024-06-27 19:59:03,792 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 267 selfloop transitions, 27 changer transitions 0/319 dead transitions. [2024-06-27 19:59:03,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 319 transitions, 4083 flow [2024-06-27 19:59:03,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:59:03,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:59:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 19:59:03,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-27 19:59:03,793 INFO L175 Difference]: Start difference. First operand has 231 places, 305 transitions, 3289 flow. Second operand 7 states and 112 transitions. [2024-06-27 19:59:03,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 319 transitions, 4083 flow [2024-06-27 19:59:04,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 319 transitions, 3938 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 19:59:04,362 INFO L231 Difference]: Finished difference. Result has 233 places, 308 transitions, 3248 flow [2024-06-27 19:59:04,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3144, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3248, PETRI_PLACES=233, PETRI_TRANSITIONS=308} [2024-06-27 19:59:04,362 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-27 19:59:04,363 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 308 transitions, 3248 flow [2024-06-27 19:59:04,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:04,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:04,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:04,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:59:04,363 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:04,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:04,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1888579964, now seen corresponding path program 3 times [2024-06-27 19:59:04,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:04,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033449340] [2024-06-27 19:59:04,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:04,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:05,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:05,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033449340] [2024-06-27 19:59:05,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033449340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:05,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:05,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:59:05,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961081055] [2024-06-27 19:59:05,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:05,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:59:05,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:05,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:59:05,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:59:05,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:59:05,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 308 transitions, 3248 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:05,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:05,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:59:05,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:06,140 INFO L124 PetriNetUnfolderBase]: 3405/5116 cut-off events. [2024-06-27 19:59:06,140 INFO L125 PetriNetUnfolderBase]: For 784753/784774 co-relation queries the response was YES. [2024-06-27 19:59:06,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50247 conditions, 5116 events. 3405/5116 cut-off events. For 784753/784774 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 26015 event pairs, 787 based on Foata normal form. 6/5101 useless extension candidates. Maximal degree in co-relation 50133. Up to 4849 conditions per place. [2024-06-27 19:59:06,328 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 267 selfloop transitions, 28 changer transitions 0/320 dead transitions. [2024-06-27 19:59:06,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 320 transitions, 3870 flow [2024-06-27 19:59:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:59:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:59:06,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 19:59:06,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-27 19:59:06,329 INFO L175 Difference]: Start difference. First operand has 233 places, 308 transitions, 3248 flow. Second operand 7 states and 115 transitions. [2024-06-27 19:59:06,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 320 transitions, 3870 flow [2024-06-27 19:59:07,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 320 transitions, 3770 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 19:59:07,249 INFO L231 Difference]: Finished difference. Result has 236 places, 308 transitions, 3210 flow [2024-06-27 19:59:07,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3210, PETRI_PLACES=236, PETRI_TRANSITIONS=308} [2024-06-27 19:59:07,249 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-27 19:59:07,249 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 308 transitions, 3210 flow [2024-06-27 19:59:07,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:07,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:07,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:07,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:59:07,250 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:07,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:07,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1033867522, now seen corresponding path program 3 times [2024-06-27 19:59:07,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:07,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17148567] [2024-06-27 19:59:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:07,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:07,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:07,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17148567] [2024-06-27 19:59:07,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17148567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:07,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:07,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:59:07,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926711466] [2024-06-27 19:59:07,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:07,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:59:07,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:07,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:59:07,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:59:08,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:59:08,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 308 transitions, 3210 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:08,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:08,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:59:08,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:09,044 INFO L124 PetriNetUnfolderBase]: 3402/5109 cut-off events. [2024-06-27 19:59:09,044 INFO L125 PetriNetUnfolderBase]: For 799534/799557 co-relation queries the response was YES. [2024-06-27 19:59:09,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50407 conditions, 5109 events. 3402/5109 cut-off events. For 799534/799557 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25937 event pairs, 773 based on Foata normal form. 9/5097 useless extension candidates. Maximal degree in co-relation 50292. Up to 4883 conditions per place. [2024-06-27 19:59:09,103 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 267 selfloop transitions, 26 changer transitions 0/318 dead transitions. [2024-06-27 19:59:09,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 318 transitions, 3820 flow [2024-06-27 19:59:09,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:59:09,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:59:09,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 19:59:09,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-27 19:59:09,104 INFO L175 Difference]: Start difference. First operand has 236 places, 308 transitions, 3210 flow. Second operand 7 states and 112 transitions. [2024-06-27 19:59:09,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 318 transitions, 3820 flow [2024-06-27 19:59:10,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 318 transitions, 3708 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 19:59:10,584 INFO L231 Difference]: Finished difference. Result has 236 places, 308 transitions, 3156 flow [2024-06-27 19:59:10,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3098, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3156, PETRI_PLACES=236, PETRI_TRANSITIONS=308} [2024-06-27 19:59:10,585 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-27 19:59:10,585 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 308 transitions, 3156 flow [2024-06-27 19:59:10,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:10,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:10,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:10,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:59:10,586 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:10,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:10,587 INFO L85 PathProgramCache]: Analyzing trace with hash 872132616, now seen corresponding path program 1 times [2024-06-27 19:59:10,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:10,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829156610] [2024-06-27 19:59:10,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:10,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:11,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:11,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829156610] [2024-06-27 19:59:11,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829156610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:11,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:11,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:59:11,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060664160] [2024-06-27 19:59:11,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:11,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:59:11,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:11,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:59:11,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:59:11,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:59:11,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 308 transitions, 3156 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:11,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:11,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:59:11,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:12,355 INFO L124 PetriNetUnfolderBase]: 3368/5083 cut-off events. [2024-06-27 19:59:12,355 INFO L125 PetriNetUnfolderBase]: For 703335/703335 co-relation queries the response was YES. [2024-06-27 19:59:12,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47563 conditions, 5083 events. 3368/5083 cut-off events. For 703335/703335 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25936 event pairs, 697 based on Foata normal form. 1/5075 useless extension candidates. Maximal degree in co-relation 47447. Up to 4919 conditions per place. [2024-06-27 19:59:12,414 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 299 selfloop transitions, 24 changer transitions 0/331 dead transitions. [2024-06-27 19:59:12,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 331 transitions, 4094 flow [2024-06-27 19:59:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:59:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:59:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 19:59:12,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-27 19:59:12,415 INFO L175 Difference]: Start difference. First operand has 236 places, 308 transitions, 3156 flow. Second operand 7 states and 118 transitions. [2024-06-27 19:59:12,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 331 transitions, 4094 flow [2024-06-27 19:59:13,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 331 transitions, 4044 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 19:59:13,669 INFO L231 Difference]: Finished difference. Result has 238 places, 314 transitions, 3274 flow [2024-06-27 19:59:13,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3274, PETRI_PLACES=238, PETRI_TRANSITIONS=314} [2024-06-27 19:59:13,669 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-27 19:59:13,669 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 314 transitions, 3274 flow [2024-06-27 19:59:13,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:13,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:13,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:13,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:59:13,670 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:13,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:13,670 INFO L85 PathProgramCache]: Analyzing trace with hash 872312354, now seen corresponding path program 1 times [2024-06-27 19:59:13,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:13,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273848119] [2024-06-27 19:59:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:13,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:14,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:14,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273848119] [2024-06-27 19:59:14,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273848119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:14,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:14,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:59:14,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735969245] [2024-06-27 19:59:14,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:14,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:59:14,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:14,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:59:14,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:59:14,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:59:14,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 314 transitions, 3274 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:14,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:14,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:59:14,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:15,219 INFO L124 PetriNetUnfolderBase]: 3193/4902 cut-off events. [2024-06-27 19:59:15,220 INFO L125 PetriNetUnfolderBase]: For 725550/725565 co-relation queries the response was YES. [2024-06-27 19:59:15,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47024 conditions, 4902 events. 3193/4902 cut-off events. For 725550/725565 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25706 event pairs, 662 based on Foata normal form. 2/4874 useless extension candidates. Maximal degree in co-relation 46907. Up to 4543 conditions per place. [2024-06-27 19:59:15,278 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 282 selfloop transitions, 25 changer transitions 0/339 dead transitions. [2024-06-27 19:59:15,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 339 transitions, 4184 flow [2024-06-27 19:59:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:59:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:59:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 19:59:15,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-27 19:59:15,279 INFO L175 Difference]: Start difference. First operand has 238 places, 314 transitions, 3274 flow. Second operand 7 states and 124 transitions. [2024-06-27 19:59:15,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 339 transitions, 4184 flow [2024-06-27 19:59:16,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 339 transitions, 4106 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 19:59:16,348 INFO L231 Difference]: Finished difference. Result has 243 places, 323 transitions, 3388 flow [2024-06-27 19:59:16,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3196, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3388, PETRI_PLACES=243, PETRI_TRANSITIONS=323} [2024-06-27 19:59:16,348 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-27 19:59:16,348 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 323 transitions, 3388 flow [2024-06-27 19:59:16,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:16,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:16,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:16,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:59:16,349 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:16,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:16,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2124570626, now seen corresponding path program 2 times [2024-06-27 19:59:16,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:16,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809503639] [2024-06-27 19:59:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:16,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:17,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:17,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809503639] [2024-06-27 19:59:17,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809503639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:17,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:17,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:59:17,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956124160] [2024-06-27 19:59:17,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:17,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:59:17,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:17,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:59:17,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:59:17,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:59:17,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 323 transitions, 3388 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:17,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:17,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:59:17,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:18,081 INFO L124 PetriNetUnfolderBase]: 3409/5142 cut-off events. [2024-06-27 19:59:18,081 INFO L125 PetriNetUnfolderBase]: For 749052/749052 co-relation queries the response was YES. [2024-06-27 19:59:18,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49570 conditions, 5142 events. 3409/5142 cut-off events. For 749052/749052 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 26205 event pairs, 696 based on Foata normal form. 1/5134 useless extension candidates. Maximal degree in co-relation 49450. Up to 4975 conditions per place. [2024-06-27 19:59:18,133 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 306 selfloop transitions, 26 changer transitions 0/340 dead transitions. [2024-06-27 19:59:18,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 340 transitions, 4280 flow [2024-06-27 19:59:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:59:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:59:18,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 19:59:18,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-27 19:59:18,134 INFO L175 Difference]: Start difference. First operand has 243 places, 323 transitions, 3388 flow. Second operand 7 states and 116 transitions. [2024-06-27 19:59:18,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 340 transitions, 4280 flow [2024-06-27 19:59:19,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 340 transitions, 4224 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 19:59:19,071 INFO L231 Difference]: Finished difference. Result has 248 places, 326 transitions, 3438 flow [2024-06-27 19:59:19,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3438, PETRI_PLACES=248, PETRI_TRANSITIONS=326} [2024-06-27 19:59:19,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-27 19:59:19,071 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 326 transitions, 3438 flow [2024-06-27 19:59:19,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:19,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:19,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:19,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:59:19,072 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:19,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:19,072 INFO L85 PathProgramCache]: Analyzing trace with hash -8278030, now seen corresponding path program 2 times [2024-06-27 19:59:19,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:19,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572646863] [2024-06-27 19:59:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:19,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:19,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:19,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572646863] [2024-06-27 19:59:19,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572646863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:19,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:19,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:59:19,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132569807] [2024-06-27 19:59:19,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:19,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:59:19,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:19,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:59:19,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:59:19,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:59:19,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 326 transitions, 3438 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:19,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:19,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:59:19,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:20,688 INFO L124 PetriNetUnfolderBase]: 3213/4930 cut-off events. [2024-06-27 19:59:20,689 INFO L125 PetriNetUnfolderBase]: For 766672/766687 co-relation queries the response was YES. [2024-06-27 19:59:20,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48282 conditions, 4930 events. 3213/4930 cut-off events. For 766672/766687 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 25825 event pairs, 660 based on Foata normal form. 3/4903 useless extension candidates. Maximal degree in co-relation 48159. Up to 4592 conditions per place. [2024-06-27 19:59:20,749 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 291 selfloop transitions, 16 changer transitions 0/340 dead transitions. [2024-06-27 19:59:20,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 340 transitions, 4134 flow [2024-06-27 19:59:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:59:20,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:59:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 19:59:20,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-27 19:59:20,750 INFO L175 Difference]: Start difference. First operand has 248 places, 326 transitions, 3438 flow. Second operand 7 states and 115 transitions. [2024-06-27 19:59:20,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 340 transitions, 4134 flow [2024-06-27 19:59:22,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 340 transitions, 4062 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 19:59:22,016 INFO L231 Difference]: Finished difference. Result has 251 places, 329 transitions, 3465 flow [2024-06-27 19:59:22,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3366, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3465, PETRI_PLACES=251, PETRI_TRANSITIONS=329} [2024-06-27 19:59:22,017 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-27 19:59:22,017 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 329 transitions, 3465 flow [2024-06-27 19:59:22,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:22,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:22,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:22,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:59:22,017 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:22,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:22,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1033683010, now seen corresponding path program 3 times [2024-06-27 19:59:22,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:22,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038405141] [2024-06-27 19:59:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:22,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:22,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:22,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038405141] [2024-06-27 19:59:22,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038405141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:22,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:22,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:59:22,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608900455] [2024-06-27 19:59:22,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:22,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:59:22,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:22,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:59:22,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:59:22,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:59:22,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 329 transitions, 3465 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:22,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:22,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:59:22,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:23,658 INFO L124 PetriNetUnfolderBase]: 3202/4917 cut-off events. [2024-06-27 19:59:23,658 INFO L125 PetriNetUnfolderBase]: For 776686/776701 co-relation queries the response was YES. [2024-06-27 19:59:23,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48233 conditions, 4917 events. 3202/4917 cut-off events. For 776686/776701 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25761 event pairs, 659 based on Foata normal form. 2/4889 useless extension candidates. Maximal degree in co-relation 48109. Up to 4571 conditions per place. [2024-06-27 19:59:23,718 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 287 selfloop transitions, 21 changer transitions 0/341 dead transitions. [2024-06-27 19:59:23,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 341 transitions, 4113 flow [2024-06-27 19:59:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:59:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:59:23,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 19:59:23,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-27 19:59:23,719 INFO L175 Difference]: Start difference. First operand has 251 places, 329 transitions, 3465 flow. Second operand 7 states and 118 transitions. [2024-06-27 19:59:23,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 341 transitions, 4113 flow [2024-06-27 19:59:24,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 341 transitions, 4008 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 19:59:24,900 INFO L231 Difference]: Finished difference. Result has 253 places, 329 transitions, 3408 flow [2024-06-27 19:59:24,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3360, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3408, PETRI_PLACES=253, PETRI_TRANSITIONS=329} [2024-06-27 19:59:24,900 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-27 19:59:24,900 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 329 transitions, 3408 flow [2024-06-27 19:59:24,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:24,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:24,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:24,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:59:24,901 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:24,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:24,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1033683258, now seen corresponding path program 3 times [2024-06-27 19:59:24,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:24,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108544501] [2024-06-27 19:59:24,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:24,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:25,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:25,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108544501] [2024-06-27 19:59:25,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108544501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:25,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:25,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:59:25,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929244850] [2024-06-27 19:59:25,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:25,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:59:25,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:25,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:59:25,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:59:25,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:59:25,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 329 transitions, 3408 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:25,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:25,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:59:25,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:26,748 INFO L124 PetriNetUnfolderBase]: 3392/5121 cut-off events. [2024-06-27 19:59:26,749 INFO L125 PetriNetUnfolderBase]: For 790620/790620 co-relation queries the response was YES. [2024-06-27 19:59:26,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49669 conditions, 5121 events. 3392/5121 cut-off events. For 790620/790620 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 26173 event pairs, 694 based on Foata normal form. 1/5113 useless extension candidates. Maximal degree in co-relation 49545. Up to 4980 conditions per place. [2024-06-27 19:59:26,805 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 317 selfloop transitions, 14 changer transitions 0/339 dead transitions. [2024-06-27 19:59:26,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 339 transitions, 4094 flow [2024-06-27 19:59:26,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:59:26,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:59:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-27 19:59:26,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588039867109635 [2024-06-27 19:59:26,806 INFO L175 Difference]: Start difference. First operand has 253 places, 329 transitions, 3408 flow. Second operand 7 states and 108 transitions. [2024-06-27 19:59:26,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 339 transitions, 4094 flow [2024-06-27 19:59:28,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 339 transitions, 3999 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:28,029 INFO L231 Difference]: Finished difference. Result has 254 places, 329 transitions, 3347 flow [2024-06-27 19:59:28,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3313, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3347, PETRI_PLACES=254, PETRI_TRANSITIONS=329} [2024-06-27 19:59:28,029 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-27 19:59:28,030 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 329 transitions, 3347 flow [2024-06-27 19:59:28,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:28,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:28,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:28,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:59:28,030 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:28,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:28,030 INFO L85 PathProgramCache]: Analyzing trace with hash -173298755, now seen corresponding path program 1 times [2024-06-27 19:59:28,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:28,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950841137] [2024-06-27 19:59:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:28,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:29,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:29,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950841137] [2024-06-27 19:59:29,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950841137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:29,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:29,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:59:29,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198637184] [2024-06-27 19:59:29,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:29,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:59:29,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:29,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:59:29,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:59:29,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:59:29,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 329 transitions, 3347 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:29,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:29,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:59:29,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:30,499 INFO L124 PetriNetUnfolderBase]: 3308/5048 cut-off events. [2024-06-27 19:59:30,499 INFO L125 PetriNetUnfolderBase]: For 960046/960061 co-relation queries the response was YES. [2024-06-27 19:59:30,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53633 conditions, 5048 events. 3308/5048 cut-off events. For 960046/960061 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 26403 event pairs, 477 based on Foata normal form. 4/5031 useless extension candidates. Maximal degree in co-relation 53508. Up to 4609 conditions per place. [2024-06-27 19:59:30,556 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 326 selfloop transitions, 21 changer transitions 0/372 dead transitions. [2024-06-27 19:59:30,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 372 transitions, 4235 flow [2024-06-27 19:59:30,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:59:30,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:59:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 19:59:30,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-27 19:59:30,557 INFO L175 Difference]: Start difference. First operand has 254 places, 329 transitions, 3347 flow. Second operand 10 states and 179 transitions. [2024-06-27 19:59:30,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 372 transitions, 4235 flow [2024-06-27 19:59:32,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 372 transitions, 4177 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 19:59:32,127 INFO L231 Difference]: Finished difference. Result has 257 places, 331 transitions, 3434 flow [2024-06-27 19:59:32,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3289, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3434, PETRI_PLACES=257, PETRI_TRANSITIONS=331} [2024-06-27 19:59:32,127 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-27 19:59:32,127 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 331 transitions, 3434 flow [2024-06-27 19:59:32,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:32,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:32,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:32,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:59:32,128 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:32,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:32,129 INFO L85 PathProgramCache]: Analyzing trace with hash -144962207, now seen corresponding path program 2 times [2024-06-27 19:59:32,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:32,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23993620] [2024-06-27 19:59:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:32,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:33,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:33,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23993620] [2024-06-27 19:59:33,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23993620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:33,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:33,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:59:33,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714754092] [2024-06-27 19:59:33,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:33,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:59:33,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:33,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:59:33,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:59:33,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:59:33,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 331 transitions, 3434 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:33,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:33,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:59:33,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:34,887 INFO L124 PetriNetUnfolderBase]: 3323/5077 cut-off events. [2024-06-27 19:59:34,887 INFO L125 PetriNetUnfolderBase]: For 989743/989758 co-relation queries the response was YES. [2024-06-27 19:59:34,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54226 conditions, 5077 events. 3323/5077 cut-off events. For 989743/989758 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 26714 event pairs, 612 based on Foata normal form. 8/5061 useless extension candidates. Maximal degree in co-relation 54100. Up to 4592 conditions per place. [2024-06-27 19:59:34,946 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 312 selfloop transitions, 37 changer transitions 0/374 dead transitions. [2024-06-27 19:59:34,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 374 transitions, 4336 flow [2024-06-27 19:59:34,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:59:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:59:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 19:59:34,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-27 19:59:34,948 INFO L175 Difference]: Start difference. First operand has 257 places, 331 transitions, 3434 flow. Second operand 10 states and 182 transitions. [2024-06-27 19:59:34,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 374 transitions, 4336 flow [2024-06-27 19:59:36,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 374 transitions, 4209 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 19:59:36,489 INFO L231 Difference]: Finished difference. Result has 259 places, 333 transitions, 3491 flow [2024-06-27 19:59:36,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3307, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3491, PETRI_PLACES=259, PETRI_TRANSITIONS=333} [2024-06-27 19:59:36,489 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-27 19:59:36,489 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 333 transitions, 3491 flow [2024-06-27 19:59:36,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:36,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:36,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:36,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:59:36,490 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:36,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:36,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1863310563, now seen corresponding path program 3 times [2024-06-27 19:59:36,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:36,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648938672] [2024-06-27 19:59:36,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:36,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:37,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:37,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648938672] [2024-06-27 19:59:37,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648938672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:37,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:37,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:59:37,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494935288] [2024-06-27 19:59:37,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:37,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:59:37,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:37,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:59:37,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:59:38,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:59:38,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 333 transitions, 3491 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:38,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:38,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:59:38,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:39,343 INFO L124 PetriNetUnfolderBase]: 3340/5114 cut-off events. [2024-06-27 19:59:39,343 INFO L125 PetriNetUnfolderBase]: For 1012700/1012715 co-relation queries the response was YES. [2024-06-27 19:59:39,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54963 conditions, 5114 events. 3340/5114 cut-off events. For 1012700/1012715 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27081 event pairs, 612 based on Foata normal form. 4/5094 useless extension candidates. Maximal degree in co-relation 54836. Up to 4573 conditions per place. [2024-06-27 19:59:39,411 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 312 selfloop transitions, 39 changer transitions 0/376 dead transitions. [2024-06-27 19:59:39,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 376 transitions, 4399 flow [2024-06-27 19:59:39,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:59:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:59:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 19:59:39,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-27 19:59:39,412 INFO L175 Difference]: Start difference. First operand has 259 places, 333 transitions, 3491 flow. Second operand 10 states and 183 transitions. [2024-06-27 19:59:39,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 376 transitions, 4399 flow [2024-06-27 19:59:41,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 376 transitions, 4239 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-27 19:59:41,293 INFO L231 Difference]: Finished difference. Result has 261 places, 335 transitions, 3520 flow [2024-06-27 19:59:41,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3331, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3520, PETRI_PLACES=261, PETRI_TRANSITIONS=335} [2024-06-27 19:59:41,294 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-27 19:59:41,294 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 335 transitions, 3520 flow [2024-06-27 19:59:41,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:41,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:41,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:41,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:59:41,295 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:41,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:41,295 INFO L85 PathProgramCache]: Analyzing trace with hash -145082177, now seen corresponding path program 4 times [2024-06-27 19:59:41,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:41,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114534161] [2024-06-27 19:59:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:41,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:42,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:42,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114534161] [2024-06-27 19:59:42,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114534161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:42,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:42,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:59:42,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354175302] [2024-06-27 19:59:42,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:42,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:59:42,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:42,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:59:42,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:59:42,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:59:42,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 335 transitions, 3520 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:42,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:42,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:59:42,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:44,065 INFO L124 PetriNetUnfolderBase]: 3373/5171 cut-off events. [2024-06-27 19:59:44,065 INFO L125 PetriNetUnfolderBase]: For 1052273/1052288 co-relation queries the response was YES. [2024-06-27 19:59:44,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56034 conditions, 5171 events. 3373/5171 cut-off events. For 1052273/1052288 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 27517 event pairs, 619 based on Foata normal form. 4/5151 useless extension candidates. Maximal degree in co-relation 55906. Up to 4556 conditions per place. [2024-06-27 19:59:44,133 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 311 selfloop transitions, 42 changer transitions 0/378 dead transitions. [2024-06-27 19:59:44,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 378 transitions, 4434 flow [2024-06-27 19:59:44,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:59:44,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:59:44,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 19:59:44,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-27 19:59:44,134 INFO L175 Difference]: Start difference. First operand has 261 places, 335 transitions, 3520 flow. Second operand 10 states and 184 transitions. [2024-06-27 19:59:44,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 378 transitions, 4434 flow [2024-06-27 19:59:46,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 378 transitions, 4263 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-27 19:59:46,265 INFO L231 Difference]: Finished difference. Result has 263 places, 337 transitions, 3548 flow [2024-06-27 19:59:46,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3349, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3548, PETRI_PLACES=263, PETRI_TRANSITIONS=337} [2024-06-27 19:59:46,266 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-27 19:59:46,266 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 337 transitions, 3548 flow [2024-06-27 19:59:46,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:46,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:46,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:46,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:59:46,266 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:46,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:46,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1972353676, now seen corresponding path program 1 times [2024-06-27 19:59:46,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:46,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723537768] [2024-06-27 19:59:46,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:46,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:47,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:47,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723537768] [2024-06-27 19:59:47,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723537768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:47,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:47,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:47,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539148141] [2024-06-27 19:59:47,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:47,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:47,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:47,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:47,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:47,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:59:47,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 337 transitions, 3548 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:47,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:47,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:59:47,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:48,441 INFO L124 PetriNetUnfolderBase]: 3575/5374 cut-off events. [2024-06-27 19:59:48,441 INFO L125 PetriNetUnfolderBase]: For 1065451/1065466 co-relation queries the response was YES. [2024-06-27 19:59:48,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56586 conditions, 5374 events. 3575/5374 cut-off events. For 1065451/1065466 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 27748 event pairs, 725 based on Foata normal form. 2/5348 useless extension candidates. Maximal degree in co-relation 56457. Up to 5056 conditions per place. [2024-06-27 19:59:48,514 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 300 selfloop transitions, 42 changer transitions 0/370 dead transitions. [2024-06-27 19:59:48,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 370 transitions, 4554 flow [2024-06-27 19:59:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 19:59:48,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-27 19:59:48,515 INFO L175 Difference]: Start difference. First operand has 263 places, 337 transitions, 3548 flow. Second operand 8 states and 142 transitions. [2024-06-27 19:59:48,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 370 transitions, 4554 flow [2024-06-27 19:59:50,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 370 transitions, 4373 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-27 19:59:50,372 INFO L231 Difference]: Finished difference. Result has 263 places, 343 transitions, 3551 flow [2024-06-27 19:59:50,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3367, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3551, PETRI_PLACES=263, PETRI_TRANSITIONS=343} [2024-06-27 19:59:50,373 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-27 19:59:50,373 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 343 transitions, 3551 flow [2024-06-27 19:59:50,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:50,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:50,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:50,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:59:50,373 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:50,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:50,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1983189881, now seen corresponding path program 1 times [2024-06-27 19:59:50,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:50,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584313955] [2024-06-27 19:59:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:50,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:51,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:51,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584313955] [2024-06-27 19:59:51,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584313955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:51,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:51,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:59:51,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378174804] [2024-06-27 19:59:51,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:51,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:59:51,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:51,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:59:51,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:59:51,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:59:51,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 343 transitions, 3551 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:51,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:51,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:59:51,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:52,119 INFO L124 PetriNetUnfolderBase]: 3588/5392 cut-off events. [2024-06-27 19:59:52,119 INFO L125 PetriNetUnfolderBase]: For 1084837/1084852 co-relation queries the response was YES. [2024-06-27 19:59:52,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57013 conditions, 5392 events. 3588/5392 cut-off events. For 1084837/1084852 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 27799 event pairs, 725 based on Foata normal form. 1/5365 useless extension candidates. Maximal degree in co-relation 56883. Up to 5147 conditions per place. [2024-06-27 19:59:52,190 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 317 selfloop transitions, 24 changer transitions 0/369 dead transitions. [2024-06-27 19:59:52,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 369 transitions, 4575 flow [2024-06-27 19:59:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:59:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:59:52,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 19:59:52,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-27 19:59:52,192 INFO L175 Difference]: Start difference. First operand has 263 places, 343 transitions, 3551 flow. Second operand 7 states and 121 transitions. [2024-06-27 19:59:52,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 369 transitions, 4575 flow [2024-06-27 19:59:54,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 369 transitions, 4498 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 19:59:54,320 INFO L231 Difference]: Finished difference. Result has 266 places, 349 transitions, 3662 flow [2024-06-27 19:59:54,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3662, PETRI_PLACES=266, PETRI_TRANSITIONS=349} [2024-06-27 19:59:54,320 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-27 19:59:54,320 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 349 transitions, 3662 flow [2024-06-27 19:59:54,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:54,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:54,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:54,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:59:54,321 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:54,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1983456791, now seen corresponding path program 2 times [2024-06-27 19:59:54,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:54,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559569489] [2024-06-27 19:59:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:54,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:54,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:54,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559569489] [2024-06-27 19:59:54,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559569489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:54,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:54,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:59:54,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939277416] [2024-06-27 19:59:54,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:54,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:59:54,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:54,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:59:54,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:59:54,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:59:54,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 349 transitions, 3662 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:54,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:54,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:59:54,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:56,108 INFO L124 PetriNetUnfolderBase]: 3593/5399 cut-off events. [2024-06-27 19:59:56,108 INFO L125 PetriNetUnfolderBase]: For 1112001/1112016 co-relation queries the response was YES. [2024-06-27 19:59:56,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57750 conditions, 5399 events. 3593/5399 cut-off events. For 1112001/1112016 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 27859 event pairs, 723 based on Foata normal form. 1/5372 useless extension candidates. Maximal degree in co-relation 57618. Up to 5169 conditions per place. [2024-06-27 19:59:56,335 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 321 selfloop transitions, 19 changer transitions 0/368 dead transitions. [2024-06-27 19:59:56,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 368 transitions, 4452 flow [2024-06-27 19:59:56,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:59:56,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:59:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 19:59:56,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-27 19:59:56,336 INFO L175 Difference]: Start difference. First operand has 266 places, 349 transitions, 3662 flow. Second operand 7 states and 116 transitions. [2024-06-27 19:59:56,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 368 transitions, 4452 flow [2024-06-27 19:59:57,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 368 transitions, 4336 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-27 19:59:57,934 INFO L231 Difference]: Finished difference. Result has 270 places, 352 transitions, 3666 flow [2024-06-27 19:59:57,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3566, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3666, PETRI_PLACES=270, PETRI_TRANSITIONS=352} [2024-06-27 19:59:57,935 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-27 19:59:57,935 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 352 transitions, 3666 flow [2024-06-27 19:59:57,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:57,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:57,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:57,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:59:57,936 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:57,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:57,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1668148577, now seen corresponding path program 5 times [2024-06-27 19:59:57,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:57,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582686362] [2024-06-27 19:59:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:57,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:59,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:59,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582686362] [2024-06-27 19:59:59,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582686362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:59,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:59,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:59:59,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785059205] [2024-06-27 19:59:59,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:59,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:59:59,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:59,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:59:59,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:59:59,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:59:59,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 352 transitions, 3666 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:59,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:59,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:59:59,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:00,662 INFO L124 PetriNetUnfolderBase]: 3415/5242 cut-off events. [2024-06-27 20:00:00,662 INFO L125 PetriNetUnfolderBase]: For 1156760/1156775 co-relation queries the response was YES. [2024-06-27 20:00:00,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58010 conditions, 5242 events. 3415/5242 cut-off events. For 1156760/1156775 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 28069 event pairs, 622 based on Foata normal form. 8/5229 useless extension candidates. Maximal degree in co-relation 57876. Up to 4493 conditions per place. [2024-06-27 20:00:00,733 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 295 selfloop transitions, 70 changer transitions 0/393 dead transitions. [2024-06-27 20:00:00,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 393 transitions, 4608 flow [2024-06-27 20:00:00,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:00:00,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:00:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 20:00:00,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-27 20:00:00,734 INFO L175 Difference]: Start difference. First operand has 270 places, 352 transitions, 3666 flow. Second operand 10 states and 188 transitions. [2024-06-27 20:00:00,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 393 transitions, 4608 flow [2024-06-27 20:00:02,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 393 transitions, 4536 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 20:00:02,279 INFO L231 Difference]: Finished difference. Result has 275 places, 354 transitions, 3854 flow [2024-06-27 20:00:02,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3594, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3854, PETRI_PLACES=275, PETRI_TRANSITIONS=354} [2024-06-27 20:00:02,280 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-27 20:00:02,280 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 354 transitions, 3854 flow [2024-06-27 20:00:02,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:02,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:02,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:02,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:00:02,280 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:02,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:02,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1668143927, now seen corresponding path program 6 times [2024-06-27 20:00:02,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:02,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405913614] [2024-06-27 20:00:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:02,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:03,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:03,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405913614] [2024-06-27 20:00:03,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405913614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:03,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:03,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:00:03,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608547751] [2024-06-27 20:00:03,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:03,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:00:03,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:03,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:00:03,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:00:03,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:00:03,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 354 transitions, 3854 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:03,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:03,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:00:03,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:05,131 INFO L124 PetriNetUnfolderBase]: 3448/5299 cut-off events. [2024-06-27 20:00:05,131 INFO L125 PetriNetUnfolderBase]: For 1192855/1192870 co-relation queries the response was YES. [2024-06-27 20:00:05,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59749 conditions, 5299 events. 3448/5299 cut-off events. For 1192855/1192870 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 28458 event pairs, 619 based on Foata normal form. 4/5282 useless extension candidates. Maximal degree in co-relation 59614. Up to 4589 conditions per place. [2024-06-27 20:00:05,205 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 300 selfloop transitions, 67 changer transitions 0/395 dead transitions. [2024-06-27 20:00:05,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 395 transitions, 4802 flow [2024-06-27 20:00:05,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:00:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:00:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 20:00:05,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-27 20:00:05,207 INFO L175 Difference]: Start difference. First operand has 275 places, 354 transitions, 3854 flow. Second operand 10 states and 187 transitions. [2024-06-27 20:00:05,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 395 transitions, 4802 flow [2024-06-27 20:00:07,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 395 transitions, 4562 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-27 20:00:07,038 INFO L231 Difference]: Finished difference. Result has 277 places, 356 transitions, 3871 flow [2024-06-27 20:00:07,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3614, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3871, PETRI_PLACES=277, PETRI_TRANSITIONS=356} [2024-06-27 20:00:07,039 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-27 20:00:07,039 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 356 transitions, 3871 flow [2024-06-27 20:00:07,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:07,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:07,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:07,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:00:07,039 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:07,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1875155969, now seen corresponding path program 7 times [2024-06-27 20:00:07,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:07,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400567806] [2024-06-27 20:00:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:07,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:08,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:08,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400567806] [2024-06-27 20:00:08,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400567806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:08,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:08,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:00:08,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336035190] [2024-06-27 20:00:08,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:08,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:00:08,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:08,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:00:08,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:00:08,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:00:08,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 356 transitions, 3871 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:08,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:08,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:00:08,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:09,608 INFO L124 PetriNetUnfolderBase]: 3560/5486 cut-off events. [2024-06-27 20:00:09,608 INFO L125 PetriNetUnfolderBase]: For 1305473/1305483 co-relation queries the response was YES. [2024-06-27 20:00:09,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61622 conditions, 5486 events. 3560/5486 cut-off events. For 1305473/1305483 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 29833 event pairs, 619 based on Foata normal form. 28/5500 useless extension candidates. Maximal degree in co-relation 61486. Up to 4594 conditions per place. [2024-06-27 20:00:09,684 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 300 selfloop transitions, 73 changer transitions 0/401 dead transitions. [2024-06-27 20:00:09,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 401 transitions, 4871 flow [2024-06-27 20:00:09,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:00:09,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:00:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 20:00:09,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:00:09,686 INFO L175 Difference]: Start difference. First operand has 277 places, 356 transitions, 3871 flow. Second operand 10 states and 190 transitions. [2024-06-27 20:00:09,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 401 transitions, 4871 flow [2024-06-27 20:00:10,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 401 transitions, 4651 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 20:00:10,968 INFO L231 Difference]: Finished difference. Result has 280 places, 358 transitions, 3927 flow [2024-06-27 20:00:10,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3651, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3927, PETRI_PLACES=280, PETRI_TRANSITIONS=358} [2024-06-27 20:00:10,968 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-27 20:00:10,969 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 358 transitions, 3927 flow [2024-06-27 20:00:10,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:10,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:10,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:10,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:00:10,969 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:10,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:10,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1845526361, now seen corresponding path program 1 times [2024-06-27 20:00:10,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:10,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950884672] [2024-06-27 20:00:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:10,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:12,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:12,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950884672] [2024-06-27 20:00:12,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950884672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:12,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:12,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:00:12,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898332680] [2024-06-27 20:00:12,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:12,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:00:12,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:12,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:00:12,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:00:12,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:00:12,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 358 transitions, 3927 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) [2024-06-27 20:00:12,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:12,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:00:12,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:13,727 INFO L124 PetriNetUnfolderBase]: 3954/5950 cut-off events. [2024-06-27 20:00:13,727 INFO L125 PetriNetUnfolderBase]: For 1352926/1352926 co-relation queries the response was YES. [2024-06-27 20:00:13,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64674 conditions, 5950 events. 3954/5950 cut-off events. For 1352926/1352926 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 31339 event pairs, 730 based on Foata normal form. 24/5961 useless extension candidates. Maximal degree in co-relation 64537. Up to 5181 conditions per place. [2024-06-27 20:00:13,807 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 315 selfloop transitions, 75 changer transitions 0/408 dead transitions. [2024-06-27 20:00:13,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 408 transitions, 4967 flow [2024-06-27 20:00:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:00:13,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:00:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-27 20:00:13,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164904862579281 [2024-06-27 20:00:13,808 INFO L175 Difference]: Start difference. First operand has 280 places, 358 transitions, 3927 flow. Second operand 11 states and 197 transitions. [2024-06-27 20:00:13,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 408 transitions, 4967 flow [2024-06-27 20:00:16,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 408 transitions, 4735 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-27 20:00:16,006 INFO L231 Difference]: Finished difference. Result has 283 places, 360 transitions, 3966 flow [2024-06-27 20:00:16,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3695, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3966, PETRI_PLACES=283, PETRI_TRANSITIONS=360} [2024-06-27 20:00:16,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-27 20:00:16,007 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 360 transitions, 3966 flow [2024-06-27 20:00:16,007 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) [2024-06-27 20:00:16,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:16,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:16,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:00:16,008 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:16,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:16,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1668028607, now seen corresponding path program 8 times [2024-06-27 20:00:16,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:16,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554037646] [2024-06-27 20:00:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:16,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:17,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:17,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554037646] [2024-06-27 20:00:17,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554037646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:17,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:17,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:00:17,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488947677] [2024-06-27 20:00:17,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:17,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:00:17,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:17,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:00:17,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:00:17,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:00:17,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 360 transitions, 3966 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:17,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:17,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:00:17,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:18,776 INFO L124 PetriNetUnfolderBase]: 3707/5736 cut-off events. [2024-06-27 20:00:18,776 INFO L125 PetriNetUnfolderBase]: For 1325669/1325684 co-relation queries the response was YES. [2024-06-27 20:00:18,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65072 conditions, 5736 events. 3707/5736 cut-off events. For 1325669/1325684 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 31727 event pairs, 664 based on Foata normal form. 4/5719 useless extension candidates. Maximal degree in co-relation 64934. Up to 4625 conditions per place. [2024-06-27 20:00:18,849 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 299 selfloop transitions, 82 changer transitions 0/409 dead transitions. [2024-06-27 20:00:18,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 409 transitions, 5420 flow [2024-06-27 20:00:18,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:00:18,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:00:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 20:00:18,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 20:00:18,850 INFO L175 Difference]: Start difference. First operand has 283 places, 360 transitions, 3966 flow. Second operand 10 states and 194 transitions. [2024-06-27 20:00:18,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 409 transitions, 5420 flow [2024-06-27 20:00:20,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 409 transitions, 5189 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-27 20:00:20,583 INFO L231 Difference]: Finished difference. Result has 284 places, 364 transitions, 4154 flow [2024-06-27 20:00:20,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3735, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4154, PETRI_PLACES=284, PETRI_TRANSITIONS=364} [2024-06-27 20:00:20,584 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-27 20:00:20,584 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 364 transitions, 4154 flow [2024-06-27 20:00:20,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:20,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:20,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:20,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:00:20,585 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:20,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:20,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1838851007, now seen corresponding path program 9 times [2024-06-27 20:00:20,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:20,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448640866] [2024-06-27 20:00:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:20,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:21,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:21,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448640866] [2024-06-27 20:00:21,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448640866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:21,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:21,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:00:21,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041925504] [2024-06-27 20:00:21,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:21,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:00:21,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:21,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:00:21,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:00:21,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:00:21,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 364 transitions, 4154 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:21,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:21,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:00:21,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:23,460 INFO L124 PetriNetUnfolderBase]: 3720/5765 cut-off events. [2024-06-27 20:00:23,460 INFO L125 PetriNetUnfolderBase]: For 1359466/1359481 co-relation queries the response was YES. [2024-06-27 20:00:23,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64854 conditions, 5765 events. 3720/5765 cut-off events. For 1359466/1359481 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 32081 event pairs, 657 based on Foata normal form. 8/5752 useless extension candidates. Maximal degree in co-relation 64715. Up to 4981 conditions per place. [2024-06-27 20:00:23,532 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 306 selfloop transitions, 71 changer transitions 0/405 dead transitions. [2024-06-27 20:00:23,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 405 transitions, 5138 flow [2024-06-27 20:00:23,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:00:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:00:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 20:00:23,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-27 20:00:23,533 INFO L175 Difference]: Start difference. First operand has 284 places, 364 transitions, 4154 flow. Second operand 10 states and 187 transitions. [2024-06-27 20:00:23,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 405 transitions, 5138 flow [2024-06-27 20:00:25,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 405 transitions, 4881 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-27 20:00:25,889 INFO L231 Difference]: Finished difference. Result has 287 places, 366 transitions, 4177 flow [2024-06-27 20:00:25,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4177, PETRI_PLACES=287, PETRI_TRANSITIONS=366} [2024-06-27 20:00:25,890 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-27 20:00:25,890 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 366 transitions, 4177 flow [2024-06-27 20:00:25,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:25,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:25,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:25,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:00:25,890 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:25,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:25,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1838846357, now seen corresponding path program 10 times [2024-06-27 20:00:25,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:25,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118478595] [2024-06-27 20:00:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:25,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:26,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:26,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118478595] [2024-06-27 20:00:26,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118478595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:26,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:26,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:00:26,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977488480] [2024-06-27 20:00:26,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:26,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:00:27,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:27,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:00:27,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:00:27,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:00:27,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 366 transitions, 4177 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:27,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:27,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:00:27,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:28,774 INFO L124 PetriNetUnfolderBase]: 3720/5766 cut-off events. [2024-06-27 20:00:28,774 INFO L125 PetriNetUnfolderBase]: For 1351628/1351638 co-relation queries the response was YES. [2024-06-27 20:00:28,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64264 conditions, 5766 events. 3720/5766 cut-off events. For 1351628/1351638 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 32006 event pairs, 650 based on Foata normal form. 4/5756 useless extension candidates. Maximal degree in co-relation 64124. Up to 4772 conditions per place. [2024-06-27 20:00:28,842 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 305 selfloop transitions, 76 changer transitions 0/409 dead transitions. [2024-06-27 20:00:28,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 409 transitions, 5075 flow [2024-06-27 20:00:28,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:00:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:00:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:00:28,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-27 20:00:28,843 INFO L175 Difference]: Start difference. First operand has 287 places, 366 transitions, 4177 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:00:28,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 409 transitions, 5075 flow [2024-06-27 20:00:30,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 409 transitions, 4771 flow, removed 83 selfloop flow, removed 8 redundant places. [2024-06-27 20:00:30,348 INFO L231 Difference]: Finished difference. Result has 289 places, 366 transitions, 4032 flow [2024-06-27 20:00:30,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3873, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4032, PETRI_PLACES=289, PETRI_TRANSITIONS=366} [2024-06-27 20:00:30,348 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-27 20:00:30,348 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 366 transitions, 4032 flow [2024-06-27 20:00:30,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:30,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:30,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:30,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:00:30,349 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:30,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:30,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1655967063, now seen corresponding path program 1 times [2024-06-27 20:00:30,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:30,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349240598] [2024-06-27 20:00:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:30,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:31,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:31,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349240598] [2024-06-27 20:00:31,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349240598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:31,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:31,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:31,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771271841] [2024-06-27 20:00:31,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:31,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:31,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:31,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:00:31,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 366 transitions, 4032 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:31,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:31,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:00:31,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:32,612 INFO L124 PetriNetUnfolderBase]: 3945/5975 cut-off events. [2024-06-27 20:00:32,613 INFO L125 PetriNetUnfolderBase]: For 1356130/1356145 co-relation queries the response was YES. [2024-06-27 20:00:32,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64331 conditions, 5975 events. 3945/5975 cut-off events. For 1356130/1356145 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 32075 event pairs, 787 based on Foata normal form. 2/5935 useless extension candidates. Maximal degree in co-relation 64190. Up to 5709 conditions per place. [2024-06-27 20:00:32,696 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 330 selfloop transitions, 34 changer transitions 0/392 dead transitions. [2024-06-27 20:00:32,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 392 transitions, 5110 flow [2024-06-27 20:00:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:32,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:32,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:00:32,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 20:00:32,698 INFO L175 Difference]: Start difference. First operand has 289 places, 366 transitions, 4032 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:00:32,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 392 transitions, 5110 flow [2024-06-27 20:00:35,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 392 transitions, 4894 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 20:00:35,046 INFO L231 Difference]: Finished difference. Result has 288 places, 372 transitions, 4012 flow [2024-06-27 20:00:35,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3816, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4012, PETRI_PLACES=288, PETRI_TRANSITIONS=372} [2024-06-27 20:00:35,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-27 20:00:35,047 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 372 transitions, 4012 flow [2024-06-27 20:00:35,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:35,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:35,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:35,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:00:35,047 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:35,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:35,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1655966598, now seen corresponding path program 2 times [2024-06-27 20:00:35,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:35,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138631086] [2024-06-27 20:00:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:35,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:35,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:35,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138631086] [2024-06-27 20:00:35,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138631086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:35,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:35,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:35,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879488896] [2024-06-27 20:00:35,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:35,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:35,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:35,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:35,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:35,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:00:35,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 372 transitions, 4012 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:35,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:35,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:00:35,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:37,352 INFO L124 PetriNetUnfolderBase]: 3971/6011 cut-off events. [2024-06-27 20:00:37,352 INFO L125 PetriNetUnfolderBase]: For 1391628/1391643 co-relation queries the response was YES. [2024-06-27 20:00:37,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64861 conditions, 6011 events. 3971/6011 cut-off events. For 1391628/1391643 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 32245 event pairs, 787 based on Foata normal form. 2/5971 useless extension candidates. Maximal degree in co-relation 64719. Up to 5682 conditions per place. [2024-06-27 20:00:37,438 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 327 selfloop transitions, 46 changer transitions 0/401 dead transitions. [2024-06-27 20:00:37,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 401 transitions, 5276 flow [2024-06-27 20:00:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:37,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:00:37,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-27 20:00:37,439 INFO L175 Difference]: Start difference. First operand has 288 places, 372 transitions, 4012 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:00:37,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 401 transitions, 5276 flow [2024-06-27 20:00:39,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 401 transitions, 5194 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 20:00:39,405 INFO L231 Difference]: Finished difference. Result has 292 places, 378 transitions, 4116 flow [2024-06-27 20:00:39,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3930, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4116, PETRI_PLACES=292, PETRI_TRANSITIONS=378} [2024-06-27 20:00:39,405 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-27 20:00:39,405 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 378 transitions, 4116 flow [2024-06-27 20:00:39,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:39,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:39,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:39,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:00:39,406 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:39,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:39,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1155468300, now seen corresponding path program 3 times [2024-06-27 20:00:39,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:39,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335136215] [2024-06-27 20:00:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:39,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:40,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:40,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335136215] [2024-06-27 20:00:40,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335136215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:40,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:40,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:40,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449944047] [2024-06-27 20:00:40,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:40,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:40,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:40,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:40,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:40,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:00:40,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 378 transitions, 4116 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:40,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:40,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:00:40,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:41,764 INFO L124 PetriNetUnfolderBase]: 3965/6003 cut-off events. [2024-06-27 20:00:41,765 INFO L125 PetriNetUnfolderBase]: For 1409864/1409879 co-relation queries the response was YES. [2024-06-27 20:00:41,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64957 conditions, 6003 events. 3965/6003 cut-off events. For 1409864/1409879 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 32219 event pairs, 787 based on Foata normal form. 2/5963 useless extension candidates. Maximal degree in co-relation 64813. Up to 5677 conditions per place. [2024-06-27 20:00:41,852 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 327 selfloop transitions, 45 changer transitions 0/400 dead transitions. [2024-06-27 20:00:41,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 400 transitions, 5106 flow [2024-06-27 20:00:41,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:41,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:00:41,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-27 20:00:41,853 INFO L175 Difference]: Start difference. First operand has 292 places, 378 transitions, 4116 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:00:41,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 400 transitions, 5106 flow [2024-06-27 20:00:43,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 400 transitions, 4986 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 20:00:43,981 INFO L231 Difference]: Finished difference. Result has 296 places, 378 transitions, 4092 flow [2024-06-27 20:00:43,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4092, PETRI_PLACES=296, PETRI_TRANSITIONS=378} [2024-06-27 20:00:43,981 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-27 20:00:43,981 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 378 transitions, 4092 flow [2024-06-27 20:00:43,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:43,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:43,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:43,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:00:43,982 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:43,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:43,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1450518889, now seen corresponding path program 3 times [2024-06-27 20:00:43,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:43,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576427100] [2024-06-27 20:00:43,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:43,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:44,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:44,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576427100] [2024-06-27 20:00:44,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576427100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:44,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:44,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:44,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738896923] [2024-06-27 20:00:44,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:44,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:44,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:44,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:44,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:44,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:00:44,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 378 transitions, 4092 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:44,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:44,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:00:44,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:46,005 INFO L124 PetriNetUnfolderBase]: 3970/6012 cut-off events. [2024-06-27 20:00:46,005 INFO L125 PetriNetUnfolderBase]: For 1433410/1433433 co-relation queries the response was YES. [2024-06-27 20:00:46,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65275 conditions, 6012 events. 3970/6012 cut-off events. For 1433410/1433433 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 32260 event pairs, 797 based on Foata normal form. 9/5979 useless extension candidates. Maximal degree in co-relation 65130. Up to 5731 conditions per place. [2024-06-27 20:00:46,078 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 333 selfloop transitions, 41 changer transitions 0/402 dead transitions. [2024-06-27 20:00:46,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 402 transitions, 5408 flow [2024-06-27 20:00:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:00:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:00:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 20:00:46,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-27 20:00:46,079 INFO L175 Difference]: Start difference. First operand has 296 places, 378 transitions, 4092 flow. Second operand 7 states and 121 transitions. [2024-06-27 20:00:46,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 402 transitions, 5408 flow [2024-06-27 20:00:48,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 402 transitions, 5310 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:00:48,754 INFO L231 Difference]: Finished difference. Result has 296 places, 384 transitions, 4236 flow [2024-06-27 20:00:48,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3994, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4236, PETRI_PLACES=296, PETRI_TRANSITIONS=384} [2024-06-27 20:00:48,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-27 20:00:48,755 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 384 transitions, 4236 flow [2024-06-27 20:00:48,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:48,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:48,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:48,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:00:48,756 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:48,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:48,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1271865067, now seen corresponding path program 4 times [2024-06-27 20:00:48,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:48,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795086567] [2024-06-27 20:00:48,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:48,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:49,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:49,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795086567] [2024-06-27 20:00:49,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795086567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:49,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:49,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:49,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662121971] [2024-06-27 20:00:49,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:49,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:49,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:49,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:49,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:49,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:00:49,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 384 transitions, 4236 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:49,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:49,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:00:49,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:50,729 INFO L124 PetriNetUnfolderBase]: 3975/6019 cut-off events. [2024-06-27 20:00:50,729 INFO L125 PetriNetUnfolderBase]: For 1464541/1464564 co-relation queries the response was YES. [2024-06-27 20:00:50,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65996 conditions, 6019 events. 3975/6019 cut-off events. For 1464541/1464564 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 32331 event pairs, 785 based on Foata normal form. 9/5986 useless extension candidates. Maximal degree in co-relation 65850. Up to 5737 conditions per place. [2024-06-27 20:00:50,820 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 329 selfloop transitions, 44 changer transitions 0/401 dead transitions. [2024-06-27 20:00:50,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 401 transitions, 5286 flow [2024-06-27 20:00:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:00:50,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:00:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 20:00:50,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-27 20:00:50,821 INFO L175 Difference]: Start difference. First operand has 296 places, 384 transitions, 4236 flow. Second operand 7 states and 117 transitions. [2024-06-27 20:00:50,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 401 transitions, 5286 flow [2024-06-27 20:00:54,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 401 transitions, 5116 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-27 20:00:54,819 INFO L231 Difference]: Finished difference. Result has 300 places, 387 transitions, 4240 flow [2024-06-27 20:00:54,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4098, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4240, PETRI_PLACES=300, PETRI_TRANSITIONS=387} [2024-06-27 20:00:54,820 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-27 20:00:54,820 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 387 transitions, 4240 flow [2024-06-27 20:00:54,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:54,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:54,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:54,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:00:54,820 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:54,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:54,821 INFO L85 PathProgramCache]: Analyzing trace with hash -42143327, now seen corresponding path program 11 times [2024-06-27 20:00:54,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:54,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965989106] [2024-06-27 20:00:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:54,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:55,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:55,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965989106] [2024-06-27 20:00:55,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965989106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:55,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:55,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:00:55,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242553678] [2024-06-27 20:00:55,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:55,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:00:55,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:55,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:00:55,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:00:56,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:00:56,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 387 transitions, 4240 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:56,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:56,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:00:56,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:57,700 INFO L124 PetriNetUnfolderBase]: 3779/5859 cut-off events. [2024-06-27 20:00:57,700 INFO L125 PetriNetUnfolderBase]: For 1534984/1535007 co-relation queries the response was YES. [2024-06-27 20:00:57,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66741 conditions, 5859 events. 3779/5859 cut-off events. For 1534984/1535007 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 32709 event pairs, 662 based on Foata normal form. 12/5846 useless extension candidates. Maximal degree in co-relation 66593. Up to 4488 conditions per place. [2024-06-27 20:00:57,790 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 233 selfloop transitions, 164 changer transitions 0/428 dead transitions. [2024-06-27 20:00:57,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 428 transitions, 5594 flow [2024-06-27 20:00:57,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:00:57,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:00:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 20:00:57,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 20:00:57,792 INFO L175 Difference]: Start difference. First operand has 300 places, 387 transitions, 4240 flow. Second operand 10 states and 194 transitions. [2024-06-27 20:00:57,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 428 transitions, 5594 flow [2024-06-27 20:01:00,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 428 transitions, 5498 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 20:01:00,768 INFO L231 Difference]: Finished difference. Result has 306 places, 389 transitions, 4608 flow [2024-06-27 20:01:00,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4144, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4608, PETRI_PLACES=306, PETRI_TRANSITIONS=389} [2024-06-27 20:01:00,768 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-27 20:01:00,768 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 389 transitions, 4608 flow [2024-06-27 20:01:00,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:00,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:00,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:00,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:01:00,769 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:00,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:00,770 INFO L85 PathProgramCache]: Analyzing trace with hash 98232157, now seen corresponding path program 12 times [2024-06-27 20:01:00,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:00,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180440376] [2024-06-27 20:01:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:00,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:01,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:01,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180440376] [2024-06-27 20:01:01,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180440376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:01,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:01,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:01:01,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320133361] [2024-06-27 20:01:01,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:01,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:01:01,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:01,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:01:01,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:01:02,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:01:02,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 389 transitions, 4608 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:02,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:02,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:01:02,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:03,710 INFO L124 PetriNetUnfolderBase]: 3806/5904 cut-off events. [2024-06-27 20:01:03,710 INFO L125 PetriNetUnfolderBase]: For 1579840/1579865 co-relation queries the response was YES. [2024-06-27 20:01:03,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68574 conditions, 5904 events. 3806/5904 cut-off events. For 1579840/1579865 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 33019 event pairs, 643 based on Foata normal form. 12/5886 useless extension candidates. Maximal degree in co-relation 68425. Up to 4528 conditions per place. [2024-06-27 20:01:03,803 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 238 selfloop transitions, 161 changer transitions 0/430 dead transitions. [2024-06-27 20:01:03,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 430 transitions, 5974 flow [2024-06-27 20:01:03,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:01:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:01:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 20:01:03,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 20:01:03,804 INFO L175 Difference]: Start difference. First operand has 306 places, 389 transitions, 4608 flow. Second operand 10 states and 193 transitions. [2024-06-27 20:01:03,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 430 transitions, 5974 flow [2024-06-27 20:01:08,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 430 transitions, 5530 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-27 20:01:08,070 INFO L231 Difference]: Finished difference. Result has 308 places, 391 transitions, 4626 flow [2024-06-27 20:01:08,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4164, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4626, PETRI_PLACES=308, PETRI_TRANSITIONS=391} [2024-06-27 20:01:08,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-27 20:01:08,071 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 391 transitions, 4626 flow [2024-06-27 20:01:08,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:08,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:08,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:08,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:01:08,071 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:08,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:08,072 INFO L85 PathProgramCache]: Analyzing trace with hash 134988193, now seen corresponding path program 13 times [2024-06-27 20:01:08,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:08,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704736426] [2024-06-27 20:01:08,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:08,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:09,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:09,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704736426] [2024-06-27 20:01:09,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704736426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:09,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:09,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:01:09,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305249830] [2024-06-27 20:01:09,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:09,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:01:09,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:09,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:01:09,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:01:09,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:01:09,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 391 transitions, 4626 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:09,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:09,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:01:09,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:10,975 INFO L124 PetriNetUnfolderBase]: 3902/6071 cut-off events. [2024-06-27 20:01:10,975 INFO L125 PetriNetUnfolderBase]: For 1686613/1686633 co-relation queries the response was YES. [2024-06-27 20:01:11,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69921 conditions, 6071 events. 3902/6071 cut-off events. For 1686613/1686633 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 34266 event pairs, 688 based on Foata normal form. 32/6080 useless extension candidates. Maximal degree in co-relation 69771. Up to 4552 conditions per place. [2024-06-27 20:01:11,072 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 255 selfloop transitions, 150 changer transitions 0/436 dead transitions. [2024-06-27 20:01:11,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 436 transitions, 6046 flow [2024-06-27 20:01:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:01:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:01:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 20:01:11,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-27 20:01:11,074 INFO L175 Difference]: Start difference. First operand has 308 places, 391 transitions, 4626 flow. Second operand 10 states and 199 transitions. [2024-06-27 20:01:11,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 436 transitions, 6046 flow [2024-06-27 20:01:15,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 436 transitions, 5604 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-06-27 20:01:15,207 INFO L231 Difference]: Finished difference. Result has 310 places, 393 transitions, 4630 flow [2024-06-27 20:01:15,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4630, PETRI_PLACES=310, PETRI_TRANSITIONS=393} [2024-06-27 20:01:15,208 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-27 20:01:15,208 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 393 transitions, 4630 flow [2024-06-27 20:01:15,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:15,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:15,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:15,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:01:15,209 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:15,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:15,210 INFO L85 PathProgramCache]: Analyzing trace with hash 98227507, now seen corresponding path program 14 times [2024-06-27 20:01:15,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:15,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22633591] [2024-06-27 20:01:15,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:15,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:16,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:16,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22633591] [2024-06-27 20:01:16,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22633591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:16,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:16,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:01:16,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539810495] [2024-06-27 20:01:16,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:16,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:01:16,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:16,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:01:16,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:01:16,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:01:16,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 393 transitions, 4630 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:16,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:16,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:01:16,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:18,285 INFO L124 PetriNetUnfolderBase]: 4055/6327 cut-off events. [2024-06-27 20:01:18,285 INFO L125 PetriNetUnfolderBase]: For 1764800/1764835 co-relation queries the response was YES. [2024-06-27 20:01:18,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75590 conditions, 6327 events. 4055/6327 cut-off events. For 1764800/1764835 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 36208 event pairs, 688 based on Foata normal form. 8/6291 useless extension candidates. Maximal degree in co-relation 75439. Up to 4659 conditions per place. [2024-06-27 20:01:18,379 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 245 selfloop transitions, 166 changer transitions 0/442 dead transitions. [2024-06-27 20:01:18,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 442 transitions, 6552 flow [2024-06-27 20:01:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:01:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:01:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 20:01:18,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-27 20:01:18,380 INFO L175 Difference]: Start difference. First operand has 310 places, 393 transitions, 4630 flow. Second operand 10 states and 199 transitions. [2024-06-27 20:01:18,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 442 transitions, 6552 flow [2024-06-27 20:01:22,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 442 transitions, 6150 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-27 20:01:22,907 INFO L231 Difference]: Finished difference. Result has 312 places, 397 transitions, 4843 flow [2024-06-27 20:01:22,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4228, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4843, PETRI_PLACES=312, PETRI_TRANSITIONS=397} [2024-06-27 20:01:22,908 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-27 20:01:22,908 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 397 transitions, 4843 flow [2024-06-27 20:01:22,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:22,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:22,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:22,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:01:22,908 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:22,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:22,908 INFO L85 PathProgramCache]: Analyzing trace with hash 104661247, now seen corresponding path program 15 times [2024-06-27 20:01:22,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:22,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081106291] [2024-06-27 20:01:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:22,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:24,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:24,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081106291] [2024-06-27 20:01:24,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081106291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:24,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:24,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:01:24,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495533637] [2024-06-27 20:01:24,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:24,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:01:24,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:01:24,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:01:24,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:01:24,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 397 transitions, 4843 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:24,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:24,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:01:24,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:25,929 INFO L124 PetriNetUnfolderBase]: 4175/6532 cut-off events. [2024-06-27 20:01:25,930 INFO L125 PetriNetUnfolderBase]: For 1900859/1900879 co-relation queries the response was YES. [2024-06-27 20:01:25,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77234 conditions, 6532 events. 4175/6532 cut-off events. For 1900859/1900879 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 37806 event pairs, 710 based on Foata normal form. 32/6541 useless extension candidates. Maximal degree in co-relation 77082. Up to 4993 conditions per place. [2024-06-27 20:01:26,024 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 258 selfloop transitions, 153 changer transitions 0/442 dead transitions. [2024-06-27 20:01:26,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 442 transitions, 6291 flow [2024-06-27 20:01:26,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:01:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:01:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 20:01:26,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-27 20:01:26,027 INFO L175 Difference]: Start difference. First operand has 312 places, 397 transitions, 4843 flow. Second operand 10 states and 198 transitions. [2024-06-27 20:01:26,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 442 transitions, 6291 flow [2024-06-27 20:01:30,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 442 transitions, 5888 flow, removed 86 selfloop flow, removed 8 redundant places. [2024-06-27 20:01:30,999 INFO L231 Difference]: Finished difference. Result has 314 places, 399 transitions, 4900 flow [2024-06-27 20:01:30,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4900, PETRI_PLACES=314, PETRI_TRANSITIONS=399} [2024-06-27 20:01:30,999 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-27 20:01:30,999 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 399 transitions, 4900 flow [2024-06-27 20:01:31,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:31,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:31,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:31,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:01:31,000 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:31,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:31,001 INFO L85 PathProgramCache]: Analyzing trace with hash 104907511, now seen corresponding path program 2 times [2024-06-27 20:01:31,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:31,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898034793] [2024-06-27 20:01:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:31,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:32,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:32,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898034793] [2024-06-27 20:01:32,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898034793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:32,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:32,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:01:32,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453944465] [2024-06-27 20:01:32,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:32,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:01:32,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:32,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:01:32,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:01:32,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:01:32,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 399 transitions, 4900 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) [2024-06-27 20:01:32,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:32,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:01:32,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:34,203 INFO L124 PetriNetUnfolderBase]: 4654/7085 cut-off events. [2024-06-27 20:01:34,203 INFO L125 PetriNetUnfolderBase]: For 1937204/1937214 co-relation queries the response was YES. [2024-06-27 20:01:34,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80523 conditions, 7085 events. 4654/7085 cut-off events. For 1937204/1937214 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 39448 event pairs, 855 based on Foata normal form. 28/7104 useless extension candidates. Maximal degree in co-relation 80371. Up to 5829 conditions per place. [2024-06-27 20:01:34,291 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 291 selfloop transitions, 135 changer transitions 0/447 dead transitions. [2024-06-27 20:01:34,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 447 transitions, 6026 flow [2024-06-27 20:01:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:01:34,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:01:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-27 20:01:34,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42917547568710357 [2024-06-27 20:01:34,292 INFO L175 Difference]: Start difference. First operand has 314 places, 399 transitions, 4900 flow. Second operand 11 states and 203 transitions. [2024-06-27 20:01:34,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 447 transitions, 6026 flow [2024-06-27 20:01:38,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 447 transitions, 5632 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-27 20:01:38,416 INFO L231 Difference]: Finished difference. Result has 317 places, 401 transitions, 4915 flow [2024-06-27 20:01:38,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4506, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4915, PETRI_PLACES=317, PETRI_TRANSITIONS=401} [2024-06-27 20:01:38,417 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-27 20:01:38,417 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 401 transitions, 4915 flow [2024-06-27 20:01:38,417 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) [2024-06-27 20:01:38,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:38,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:38,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:01:38,417 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:38,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:38,418 INFO L85 PathProgramCache]: Analyzing trace with hash -42147977, now seen corresponding path program 16 times [2024-06-27 20:01:38,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:38,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816052499] [2024-06-27 20:01:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:38,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:39,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:39,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816052499] [2024-06-27 20:01:39,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816052499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:39,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:39,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:01:39,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116385758] [2024-06-27 20:01:39,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:39,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:01:39,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:39,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:01:39,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:01:39,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:01:39,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 401 transitions, 4915 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:39,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:39,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:01:39,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:41,714 INFO L124 PetriNetUnfolderBase]: 4268/6695 cut-off events. [2024-06-27 20:01:41,714 INFO L125 PetriNetUnfolderBase]: For 1864504/1864534 co-relation queries the response was YES. [2024-06-27 20:01:41,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78558 conditions, 6695 events. 4268/6695 cut-off events. For 1864504/1864534 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 39132 event pairs, 738 based on Foata normal form. 8/6666 useless extension candidates. Maximal degree in co-relation 78405. Up to 5251 conditions per place. [2024-06-27 20:01:42,037 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 244 selfloop transitions, 167 changer transitions 0/442 dead transitions. [2024-06-27 20:01:42,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 442 transitions, 6333 flow [2024-06-27 20:01:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:01:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:01:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 20:01:42,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 20:01:42,039 INFO L175 Difference]: Start difference. First operand has 317 places, 401 transitions, 4915 flow. Second operand 10 states and 195 transitions. [2024-06-27 20:01:42,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 442 transitions, 6333 flow [2024-06-27 20:01:46,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 442 transitions, 5964 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-27 20:01:46,522 INFO L231 Difference]: Finished difference. Result has 318 places, 403 transitions, 5029 flow [2024-06-27 20:01:46,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4546, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5029, PETRI_PLACES=318, PETRI_TRANSITIONS=403} [2024-06-27 20:01:46,522 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-27 20:01:46,522 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 403 transitions, 5029 flow [2024-06-27 20:01:46,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:46,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:46,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:46,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:01:46,523 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:46,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:46,523 INFO L85 PathProgramCache]: Analyzing trace with hash -238281841, now seen corresponding path program 3 times [2024-06-27 20:01:46,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:46,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006155904] [2024-06-27 20:01:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:46,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:47,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:47,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006155904] [2024-06-27 20:01:47,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006155904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:47,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:47,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:01:47,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060017818] [2024-06-27 20:01:47,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:47,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:01:47,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:47,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:01:47,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:01:47,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:01:47,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 403 transitions, 5029 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) [2024-06-27 20:01:47,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:47,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:01:47,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:49,542 INFO L124 PetriNetUnfolderBase]: 4816/7347 cut-off events. [2024-06-27 20:01:49,542 INFO L125 PetriNetUnfolderBase]: For 2007919/2007929 co-relation queries the response was YES. [2024-06-27 20:01:49,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84630 conditions, 7347 events. 4816/7347 cut-off events. For 2007919/2007929 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 41331 event pairs, 780 based on Foata normal form. 8/7346 useless extension candidates. Maximal degree in co-relation 84476. Up to 5473 conditions per place. [2024-06-27 20:01:49,662 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 254 selfloop transitions, 184 changer transitions 0/459 dead transitions. [2024-06-27 20:01:49,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 459 transitions, 7067 flow [2024-06-27 20:01:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:01:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:01:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-27 20:01:49,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4334038054968288 [2024-06-27 20:01:49,664 INFO L175 Difference]: Start difference. First operand has 318 places, 403 transitions, 5029 flow. Second operand 11 states and 205 transitions. [2024-06-27 20:01:49,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 459 transitions, 7067 flow [2024-06-27 20:01:54,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 459 transitions, 6598 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-27 20:01:54,658 INFO L231 Difference]: Finished difference. Result has 321 places, 409 transitions, 5227 flow [2024-06-27 20:01:54,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4564, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5227, PETRI_PLACES=321, PETRI_TRANSITIONS=409} [2024-06-27 20:01:54,658 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-27 20:01:54,658 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 409 transitions, 5227 flow [2024-06-27 20:01:54,658 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) [2024-06-27 20:01:54,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:54,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:54,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:01:54,659 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:54,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:54,659 INFO L85 PathProgramCache]: Analyzing trace with hash -42263297, now seen corresponding path program 17 times [2024-06-27 20:01:54,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:54,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656409867] [2024-06-27 20:01:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:54,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:55,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:55,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656409867] [2024-06-27 20:01:55,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656409867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:55,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:55,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:01:55,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210644160] [2024-06-27 20:01:55,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:55,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:01:55,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:55,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:01:55,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:01:56,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:01:56,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 409 transitions, 5227 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:56,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:56,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:01:56,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:57,812 INFO L124 PetriNetUnfolderBase]: 4437/6973 cut-off events. [2024-06-27 20:01:57,812 INFO L125 PetriNetUnfolderBase]: For 2047046/2047071 co-relation queries the response was YES. [2024-06-27 20:01:57,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84070 conditions, 6973 events. 4437/6973 cut-off events. For 2047046/2047071 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 41158 event pairs, 766 based on Foata normal form. 8/6951 useless extension candidates. Maximal degree in co-relation 83915. Up to 4763 conditions per place. [2024-06-27 20:01:57,919 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 240 selfloop transitions, 187 changer transitions 0/458 dead transitions. [2024-06-27 20:01:57,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 458 transitions, 7235 flow [2024-06-27 20:01:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:01:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:01:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 20:01:57,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:01:57,920 INFO L175 Difference]: Start difference. First operand has 321 places, 409 transitions, 5227 flow. Second operand 10 states and 200 transitions. [2024-06-27 20:01:57,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 458 transitions, 7235 flow [2024-06-27 20:02:02,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 458 transitions, 6937 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:02,031 INFO L231 Difference]: Finished difference. Result has 325 places, 413 transitions, 5602 flow [2024-06-27 20:02:02,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4929, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5602, PETRI_PLACES=325, PETRI_TRANSITIONS=413} [2024-06-27 20:02:02,032 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-27 20:02:02,032 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 413 transitions, 5602 flow [2024-06-27 20:02:02,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:02,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:02,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:02,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:02:02,032 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:02,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:02,032 INFO L85 PathProgramCache]: Analyzing trace with hash -248420081, now seen corresponding path program 1 times [2024-06-27 20:02:02,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:02,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816377848] [2024-06-27 20:02:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:02,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:03,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:03,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816377848] [2024-06-27 20:02:03,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816377848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:03,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:03,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:02:03,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140178188] [2024-06-27 20:02:03,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:03,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:02:03,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:03,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:02:03,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:02:03,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:02:03,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 413 transitions, 5602 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:03,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:03,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:02:03,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:04,957 INFO L124 PetriNetUnfolderBase]: 4851/7403 cut-off events. [2024-06-27 20:02:04,958 INFO L125 PetriNetUnfolderBase]: For 2057833/2057843 co-relation queries the response was YES. [2024-06-27 20:02:05,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85495 conditions, 7403 events. 4851/7403 cut-off events. For 2057833/2057843 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 41826 event pairs, 859 based on Foata normal form. 8/7402 useless extension candidates. Maximal degree in co-relation 85340. Up to 6295 conditions per place. [2024-06-27 20:02:05,064 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 283 selfloop transitions, 149 changer transitions 0/453 dead transitions. [2024-06-27 20:02:05,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 453 transitions, 6601 flow [2024-06-27 20:02:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:02:05,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:02:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 20:02:05,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-27 20:02:05,065 INFO L175 Difference]: Start difference. First operand has 325 places, 413 transitions, 5602 flow. Second operand 10 states and 182 transitions. [2024-06-27 20:02:05,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 453 transitions, 6601 flow [2024-06-27 20:02:10,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 453 transitions, 6191 flow, removed 105 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:10,274 INFO L231 Difference]: Finished difference. Result has 329 places, 416 transitions, 5541 flow [2024-06-27 20:02:10,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5196, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5541, PETRI_PLACES=329, PETRI_TRANSITIONS=416} [2024-06-27 20:02:10,274 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-27 20:02:10,274 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 416 transitions, 5541 flow [2024-06-27 20:02:10,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:10,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:10,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:10,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:02:10,275 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:10,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:10,276 INFO L85 PathProgramCache]: Analyzing trace with hash 128559103, now seen corresponding path program 18 times [2024-06-27 20:02:10,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:10,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671847719] [2024-06-27 20:02:10,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:10,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:11,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:11,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671847719] [2024-06-27 20:02:11,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671847719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:11,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:11,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:11,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070977449] [2024-06-27 20:02:11,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:11,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:11,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:11,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:11,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:11,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:02:11,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 416 transitions, 5541 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:11,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:11,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:02:11,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:13,522 INFO L124 PetriNetUnfolderBase]: 4443/6991 cut-off events. [2024-06-27 20:02:13,522 INFO L125 PetriNetUnfolderBase]: For 2085999/2086029 co-relation queries the response was YES. [2024-06-27 20:02:13,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84130 conditions, 6991 events. 4443/6991 cut-off events. For 2085999/2086029 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 41528 event pairs, 786 based on Foata normal form. 12/6966 useless extension candidates. Maximal degree in co-relation 83973. Up to 5570 conditions per place. [2024-06-27 20:02:13,628 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 270 selfloop transitions, 154 changer transitions 0/455 dead transitions. [2024-06-27 20:02:13,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 455 transitions, 6621 flow [2024-06-27 20:02:13,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:02:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:02:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 20:02:13,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 20:02:13,629 INFO L175 Difference]: Start difference. First operand has 329 places, 416 transitions, 5541 flow. Second operand 10 states and 194 transitions. [2024-06-27 20:02:13,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 455 transitions, 6621 flow [2024-06-27 20:02:18,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 455 transitions, 6195 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 20:02:18,905 INFO L231 Difference]: Finished difference. Result has 329 places, 418 transitions, 5567 flow [2024-06-27 20:02:18,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5115, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5567, PETRI_PLACES=329, PETRI_TRANSITIONS=418} [2024-06-27 20:02:18,906 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-27 20:02:18,906 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 418 transitions, 5567 flow [2024-06-27 20:02:18,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:18,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:18,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:18,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:02:18,906 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:18,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:18,907 INFO L85 PathProgramCache]: Analyzing trace with hash -859353759, now seen corresponding path program 19 times [2024-06-27 20:02:18,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:18,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033422306] [2024-06-27 20:02:18,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:18,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:20,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:20,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033422306] [2024-06-27 20:02:20,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033422306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:20,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:20,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:20,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016627891] [2024-06-27 20:02:20,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:20,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:20,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:20,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:20,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:20,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:02:20,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 418 transitions, 5567 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:20,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:20,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:02:20,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:22,138 INFO L124 PetriNetUnfolderBase]: 4403/6928 cut-off events. [2024-06-27 20:02:22,138 INFO L125 PetriNetUnfolderBase]: For 2085018/2085043 co-relation queries the response was YES. [2024-06-27 20:02:22,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80662 conditions, 6928 events. 4403/6928 cut-off events. For 2085018/2085043 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 41039 event pairs, 719 based on Foata normal form. 32/6930 useless extension candidates. Maximal degree in co-relation 80504. Up to 5369 conditions per place. [2024-06-27 20:02:22,239 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 259 selfloop transitions, 169 changer transitions 0/459 dead transitions. [2024-06-27 20:02:22,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 459 transitions, 6557 flow [2024-06-27 20:02:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:02:22,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:02:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 20:02:22,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 20:02:22,241 INFO L175 Difference]: Start difference. First operand has 329 places, 418 transitions, 5567 flow. Second operand 10 states and 194 transitions. [2024-06-27 20:02:22,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 459 transitions, 6557 flow [2024-06-27 20:02:28,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 459 transitions, 6041 flow, removed 106 selfloop flow, removed 8 redundant places. [2024-06-27 20:02:28,635 INFO L231 Difference]: Finished difference. Result has 331 places, 418 transitions, 5400 flow [2024-06-27 20:02:28,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5051, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5400, PETRI_PLACES=331, PETRI_TRANSITIONS=418} [2024-06-27 20:02:28,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-27 20:02:28,636 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 418 transitions, 5400 flow [2024-06-27 20:02:28,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:28,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:28,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:28,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:02:28,636 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:28,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:28,636 INFO L85 PathProgramCache]: Analyzing trace with hash -197041771, now seen corresponding path program 20 times [2024-06-27 20:02:28,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:28,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482649983] [2024-06-27 20:02:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:28,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:29,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:29,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482649983] [2024-06-27 20:02:29,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482649983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:29,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:29,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:29,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992663544] [2024-06-27 20:02:29,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:29,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:29,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:29,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:29,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:29,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:02:29,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 418 transitions, 5400 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:29,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:29,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:02:29,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:31,748 INFO L124 PetriNetUnfolderBase]: 4395/6916 cut-off events. [2024-06-27 20:02:31,748 INFO L125 PetriNetUnfolderBase]: For 1962295/1962320 co-relation queries the response was YES. [2024-06-27 20:02:31,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79106 conditions, 6916 events. 4395/6916 cut-off events. For 1962295/1962320 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 40913 event pairs, 762 based on Foata normal form. 8/6894 useless extension candidates. Maximal degree in co-relation 78947. Up to 5285 conditions per place. [2024-06-27 20:02:31,848 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 269 selfloop transitions, 159 changer transitions 0/459 dead transitions. [2024-06-27 20:02:31,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 459 transitions, 6388 flow [2024-06-27 20:02:31,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:02:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:02:31,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 20:02:31,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-27 20:02:31,849 INFO L175 Difference]: Start difference. First operand has 331 places, 418 transitions, 5400 flow. Second operand 10 states and 198 transitions. [2024-06-27 20:02:31,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 459 transitions, 6388 flow [2024-06-27 20:02:37,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 459 transitions, 5949 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-27 20:02:37,813 INFO L231 Difference]: Finished difference. Result has 332 places, 418 transitions, 5286 flow [2024-06-27 20:02:37,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4961, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5286, PETRI_PLACES=332, PETRI_TRANSITIONS=418} [2024-06-27 20:02:37,813 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-27 20:02:37,813 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 418 transitions, 5286 flow [2024-06-27 20:02:37,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:37,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:37,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:37,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:02:37,814 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:37,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:37,814 INFO L85 PathProgramCache]: Analyzing trace with hash -248411401, now seen corresponding path program 4 times [2024-06-27 20:02:37,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:37,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698080232] [2024-06-27 20:02:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:37,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:38,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:38,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698080232] [2024-06-27 20:02:38,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698080232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:38,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:38,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:38,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108589280] [2024-06-27 20:02:38,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:38,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:38,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:38,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:38,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:39,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:02:39,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 418 transitions, 5286 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) [2024-06-27 20:02:39,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:39,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:02:39,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:41,102 INFO L124 PetriNetUnfolderBase]: 4909/7505 cut-off events. [2024-06-27 20:02:41,102 INFO L125 PetriNetUnfolderBase]: For 2098562/2098572 co-relation queries the response was YES. [2024-06-27 20:02:41,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81975 conditions, 7505 events. 4909/7505 cut-off events. For 2098562/2098572 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 42669 event pairs, 849 based on Foata normal form. 28/7524 useless extension candidates. Maximal degree in co-relation 81815. Up to 6259 conditions per place. [2024-06-27 20:02:41,209 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 294 selfloop transitions, 151 changer transitions 0/466 dead transitions. [2024-06-27 20:02:41,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 466 transitions, 6426 flow [2024-06-27 20:02:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:02:41,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:02:41,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-27 20:02:41,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249471458773784 [2024-06-27 20:02:41,211 INFO L175 Difference]: Start difference. First operand has 332 places, 418 transitions, 5286 flow. Second operand 11 states and 201 transitions. [2024-06-27 20:02:41,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 466 transitions, 6426 flow [2024-06-27 20:02:45,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 466 transitions, 5885 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-27 20:02:45,233 INFO L231 Difference]: Finished difference. Result has 333 places, 420 transitions, 5162 flow [2024-06-27 20:02:45,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4745, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5162, PETRI_PLACES=333, PETRI_TRANSITIONS=420} [2024-06-27 20:02:45,233 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-27 20:02:45,234 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 420 transitions, 5162 flow [2024-06-27 20:02:45,234 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) [2024-06-27 20:02:45,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:45,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:45,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:02:45,234 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:45,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:45,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2143644137, now seen corresponding path program 5 times [2024-06-27 20:02:45,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:45,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153165129] [2024-06-27 20:02:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:45,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:46,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:46,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153165129] [2024-06-27 20:02:46,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153165129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:46,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:46,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:46,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942399704] [2024-06-27 20:02:46,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:46,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:46,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:46,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:46,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:46,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:02:46,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 420 transitions, 5162 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) [2024-06-27 20:02:46,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:46,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:02:46,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:48,687 INFO L124 PetriNetUnfolderBase]: 5001/7657 cut-off events. [2024-06-27 20:02:48,688 INFO L125 PetriNetUnfolderBase]: For 2155090/2155100 co-relation queries the response was YES. [2024-06-27 20:02:48,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83078 conditions, 7657 events. 5001/7657 cut-off events. For 2155090/2155100 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 43866 event pairs, 924 based on Foata normal form. 28/7676 useless extension candidates. Maximal degree in co-relation 82918. Up to 6391 conditions per place. [2024-06-27 20:02:48,788 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 313 selfloop transitions, 134 changer transitions 0/468 dead transitions. [2024-06-27 20:02:48,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 468 transitions, 6310 flow [2024-06-27 20:02:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:02:48,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:02:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-27 20:02:48,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312896405919662 [2024-06-27 20:02:48,789 INFO L175 Difference]: Start difference. First operand has 333 places, 420 transitions, 5162 flow. Second operand 11 states and 204 transitions. [2024-06-27 20:02:48,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 468 transitions, 6310 flow [2024-06-27 20:02:53,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 468 transitions, 5937 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-27 20:02:53,671 INFO L231 Difference]: Finished difference. Result has 335 places, 422 transitions, 5176 flow [2024-06-27 20:02:53,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4789, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5176, PETRI_PLACES=335, PETRI_TRANSITIONS=422} [2024-06-27 20:02:53,672 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-27 20:02:53,672 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 422 transitions, 5176 flow [2024-06-27 20:02:53,672 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) [2024-06-27 20:02:53,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:53,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:53,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:02:53,672 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:53,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:53,673 INFO L85 PathProgramCache]: Analyzing trace with hash -533511271, now seen corresponding path program 6 times [2024-06-27 20:02:53,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:53,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118370085] [2024-06-27 20:02:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:53,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:54,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:54,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118370085] [2024-06-27 20:02:54,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118370085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:54,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:54,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:54,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601470470] [2024-06-27 20:02:54,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:54,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:54,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:54,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:54,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:54,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:02:54,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 422 transitions, 5176 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) [2024-06-27 20:02:54,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:54,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:02:54,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:56,990 INFO L124 PetriNetUnfolderBase]: 4982/7628 cut-off events. [2024-06-27 20:02:56,990 INFO L125 PetriNetUnfolderBase]: For 2080204/2080214 co-relation queries the response was YES. [2024-06-27 20:02:57,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80291 conditions, 7628 events. 4982/7628 cut-off events. For 2080204/2080214 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 43709 event pairs, 846 based on Foata normal form. 28/7647 useless extension candidates. Maximal degree in co-relation 80130. Up to 6382 conditions per place. [2024-06-27 20:02:57,095 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 304 selfloop transitions, 145 changer transitions 0/470 dead transitions. [2024-06-27 20:02:57,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 470 transitions, 6332 flow [2024-06-27 20:02:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:02:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:02:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-27 20:02:57,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427061310782241 [2024-06-27 20:02:57,096 INFO L175 Difference]: Start difference. First operand has 335 places, 422 transitions, 5176 flow. Second operand 11 states and 202 transitions. [2024-06-27 20:02:57,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 470 transitions, 6332 flow [2024-06-27 20:03:00,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 470 transitions, 5989 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-27 20:03:00,379 INFO L231 Difference]: Finished difference. Result has 337 places, 424 transitions, 5246 flow [2024-06-27 20:03:00,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4833, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5246, PETRI_PLACES=337, PETRI_TRANSITIONS=424} [2024-06-27 20:03:00,379 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-27 20:03:00,379 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 424 transitions, 5246 flow [2024-06-27 20:03:00,379 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) [2024-06-27 20:03:00,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:00,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:00,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:03:00,379 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:00,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:00,380 INFO L85 PathProgramCache]: Analyzing trace with hash 334884421, now seen corresponding path program 7 times [2024-06-27 20:03:00,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:00,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062307122] [2024-06-27 20:03:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:00,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:01,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:01,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062307122] [2024-06-27 20:03:01,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062307122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:01,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:01,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:03:01,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532535926] [2024-06-27 20:03:01,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:01,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:03:01,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:01,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:03:01,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:03:01,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:03:01,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 424 transitions, 5246 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) [2024-06-27 20:03:01,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:01,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:03:01,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:03,490 INFO L124 PetriNetUnfolderBase]: 4974/7616 cut-off events. [2024-06-27 20:03:03,490 INFO L125 PetriNetUnfolderBase]: For 1978694/1978704 co-relation queries the response was YES. [2024-06-27 20:03:03,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79332 conditions, 7616 events. 4974/7616 cut-off events. For 1978694/1978704 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 43643 event pairs, 839 based on Foata normal form. 8/7615 useless extension candidates. Maximal degree in co-relation 79170. Up to 6279 conditions per place. [2024-06-27 20:03:03,611 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 264 selfloop transitions, 180 changer transitions 0/465 dead transitions. [2024-06-27 20:03:03,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 465 transitions, 6244 flow [2024-06-27 20:03:03,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:03:03,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:03:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-27 20:03:03,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143763213530655 [2024-06-27 20:03:03,612 INFO L175 Difference]: Start difference. First operand has 337 places, 424 transitions, 5246 flow. Second operand 11 states and 196 transitions. [2024-06-27 20:03:03,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 465 transitions, 6244 flow [2024-06-27 20:03:08,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 465 transitions, 5809 flow, removed 75 selfloop flow, removed 9 redundant places. [2024-06-27 20:03:08,270 INFO L231 Difference]: Finished difference. Result has 339 places, 424 transitions, 5178 flow [2024-06-27 20:03:08,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5178, PETRI_PLACES=339, PETRI_TRANSITIONS=424} [2024-06-27 20:03:08,270 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-27 20:03:08,270 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 424 transitions, 5178 flow [2024-06-27 20:03:08,270 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) [2024-06-27 20:03:08,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:08,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:08,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:03:08,271 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:08,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:08,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1979416369, now seen corresponding path program 5 times [2024-06-27 20:03:08,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:08,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912232499] [2024-06-27 20:03:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:08,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:08,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:08,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912232499] [2024-06-27 20:03:08,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912232499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:08,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:08,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:08,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244679466] [2024-06-27 20:03:08,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:08,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:08,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:08,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:08,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:08,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:03:08,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 424 transitions, 5178 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:08,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:08,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:03:08,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:10,640 INFO L124 PetriNetUnfolderBase]: 4828/7425 cut-off events. [2024-06-27 20:03:10,640 INFO L125 PetriNetUnfolderBase]: For 1959625/1959648 co-relation queries the response was YES. [2024-06-27 20:03:10,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77668 conditions, 7425 events. 4828/7425 cut-off events. For 1959625/1959648 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42994 event pairs, 947 based on Foata normal form. 9/7371 useless extension candidates. Maximal degree in co-relation 77505. Up to 7183 conditions per place. [2024-06-27 20:03:10,743 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 380 selfloop transitions, 27 changer transitions 0/435 dead transitions. [2024-06-27 20:03:10,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 435 transitions, 6244 flow [2024-06-27 20:03:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:10,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 20:03:10,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-27 20:03:10,744 INFO L175 Difference]: Start difference. First operand has 339 places, 424 transitions, 5178 flow. Second operand 7 states and 112 transitions. [2024-06-27 20:03:10,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 435 transitions, 6244 flow [2024-06-27 20:03:16,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 435 transitions, 5786 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-27 20:03:16,545 INFO L231 Difference]: Finished difference. Result has 337 places, 424 transitions, 4780 flow [2024-06-27 20:03:16,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4720, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4780, PETRI_PLACES=337, PETRI_TRANSITIONS=424} [2024-06-27 20:03:16,545 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-27 20:03:16,546 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 424 transitions, 4780 flow [2024-06-27 20:03:16,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:16,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:16,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:16,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:03:16,546 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:16,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:16,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1985130289, now seen corresponding path program 6 times [2024-06-27 20:03:16,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:16,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889043460] [2024-06-27 20:03:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:16,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:17,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:17,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889043460] [2024-06-27 20:03:17,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889043460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:17,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:17,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:17,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809813549] [2024-06-27 20:03:17,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:17,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:17,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:17,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:17,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:17,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:03:17,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 424 transitions, 4780 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:17,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:17,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:03:17,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:19,000 INFO L124 PetriNetUnfolderBase]: 4825/7421 cut-off events. [2024-06-27 20:03:19,000 INFO L125 PetriNetUnfolderBase]: For 1982829/1982852 co-relation queries the response was YES. [2024-06-27 20:03:19,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76665 conditions, 7421 events. 4825/7421 cut-off events. For 1982829/1982852 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42924 event pairs, 947 based on Foata normal form. 9/7367 useless extension candidates. Maximal degree in co-relation 76501. Up to 7189 conditions per place. [2024-06-27 20:03:19,096 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 387 selfloop transitions, 19 changer transitions 0/434 dead transitions. [2024-06-27 20:03:19,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 434 transitions, 5616 flow [2024-06-27 20:03:19,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 20:03:19,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3654485049833887 [2024-06-27 20:03:19,097 INFO L175 Difference]: Start difference. First operand has 337 places, 424 transitions, 4780 flow. Second operand 7 states and 110 transitions. [2024-06-27 20:03:19,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 434 transitions, 5616 flow [2024-06-27 20:03:25,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 434 transitions, 5496 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:25,706 INFO L231 Difference]: Finished difference. Result has 338 places, 424 transitions, 4704 flow [2024-06-27 20:03:25,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4660, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4704, PETRI_PLACES=338, PETRI_TRANSITIONS=424} [2024-06-27 20:03:25,706 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-27 20:03:25,706 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 424 transitions, 4704 flow [2024-06-27 20:03:25,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:25,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:25,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:25,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:03:25,707 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:25,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:25,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1583564970, now seen corresponding path program 4 times [2024-06-27 20:03:25,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:25,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076937341] [2024-06-27 20:03:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:25,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:26,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:26,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076937341] [2024-06-27 20:03:26,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076937341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:26,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:26,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:26,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993090269] [2024-06-27 20:03:26,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:26,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:26,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:26,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:26,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:26,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:03:26,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 424 transitions, 4704 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:26,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:26,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:03:26,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:28,308 INFO L124 PetriNetUnfolderBase]: 4835/7438 cut-off events. [2024-06-27 20:03:28,308 INFO L125 PetriNetUnfolderBase]: For 2022356/2022377 co-relation queries the response was YES. [2024-06-27 20:03:28,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76967 conditions, 7438 events. 4835/7438 cut-off events. For 2022356/2022377 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 43060 event pairs, 959 based on Foata normal form. 6/7381 useless extension candidates. Maximal degree in co-relation 76802. Up to 7103 conditions per place. [2024-06-27 20:03:28,422 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 365 selfloop transitions, 49 changer transitions 0/442 dead transitions. [2024-06-27 20:03:28,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 442 transitions, 5849 flow [2024-06-27 20:03:28,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:28,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:03:28,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-27 20:03:28,423 INFO L175 Difference]: Start difference. First operand has 338 places, 424 transitions, 4704 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:03:28,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 442 transitions, 5849 flow [2024-06-27 20:03:33,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 442 transitions, 5747 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 20:03:33,451 INFO L231 Difference]: Finished difference. Result has 338 places, 427 transitions, 4753 flow [2024-06-27 20:03:33,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4602, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4753, PETRI_PLACES=338, PETRI_TRANSITIONS=427} [2024-06-27 20:03:33,452 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-27 20:03:33,452 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 427 transitions, 4753 flow [2024-06-27 20:03:33,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:33,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:33,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:33,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:03:33,452 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:33,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1583577990, now seen corresponding path program 5 times [2024-06-27 20:03:33,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:33,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867952499] [2024-06-27 20:03:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:33,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:34,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:34,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867952499] [2024-06-27 20:03:34,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867952499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:34,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:34,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:34,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986394379] [2024-06-27 20:03:34,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:34,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:34,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:34,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:34,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:34,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:03:34,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 427 transitions, 4753 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:34,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:34,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:03:34,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:36,110 INFO L124 PetriNetUnfolderBase]: 4845/7452 cut-off events. [2024-06-27 20:03:36,110 INFO L125 PetriNetUnfolderBase]: For 2054124/2054145 co-relation queries the response was YES. [2024-06-27 20:03:36,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77186 conditions, 7452 events. 4845/7452 cut-off events. For 2054124/2054145 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 43091 event pairs, 959 based on Foata normal form. 6/7395 useless extension candidates. Maximal degree in co-relation 77021. Up to 7113 conditions per place. [2024-06-27 20:03:36,224 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 367 selfloop transitions, 51 changer transitions 0/446 dead transitions. [2024-06-27 20:03:36,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 446 transitions, 5918 flow [2024-06-27 20:03:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:36,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:36,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:03:36,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-27 20:03:36,225 INFO L175 Difference]: Start difference. First operand has 338 places, 427 transitions, 4753 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:03:36,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 446 transitions, 5918 flow [2024-06-27 20:03:40,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 446 transitions, 5730 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 20:03:40,877 INFO L231 Difference]: Finished difference. Result has 339 places, 430 transitions, 4726 flow [2024-06-27 20:03:40,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4580, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4726, PETRI_PLACES=339, PETRI_TRANSITIONS=430} [2024-06-27 20:03:40,878 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-27 20:03:40,878 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 430 transitions, 4726 flow [2024-06-27 20:03:40,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:40,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:40,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:40,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:03:40,878 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:40,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:40,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1583578455, now seen corresponding path program 2 times [2024-06-27 20:03:40,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:40,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935559077] [2024-06-27 20:03:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:40,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:41,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:41,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935559077] [2024-06-27 20:03:41,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935559077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:41,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:41,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:41,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822067432] [2024-06-27 20:03:41,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:41,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:41,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:41,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:41,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:41,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:03:41,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 430 transitions, 4726 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:41,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:41,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:03:41,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:43,582 INFO L124 PetriNetUnfolderBase]: 4855/7463 cut-off events. [2024-06-27 20:03:43,582 INFO L125 PetriNetUnfolderBase]: For 2086458/2086481 co-relation queries the response was YES. [2024-06-27 20:03:43,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77522 conditions, 7463 events. 4855/7463 cut-off events. For 2086458/2086481 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 43144 event pairs, 946 based on Foata normal form. 10/7410 useless extension candidates. Maximal degree in co-relation 77356. Up to 7191 conditions per place. [2024-06-27 20:03:43,684 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 383 selfloop transitions, 37 changer transitions 0/448 dead transitions. [2024-06-27 20:03:43,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 448 transitions, 5896 flow [2024-06-27 20:03:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:03:43,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-27 20:03:43,685 INFO L175 Difference]: Start difference. First operand has 339 places, 430 transitions, 4726 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:03:43,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 448 transitions, 5896 flow [2024-06-27 20:03:49,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 448 transitions, 5784 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:49,421 INFO L231 Difference]: Finished difference. Result has 342 places, 433 transitions, 4750 flow [2024-06-27 20:03:49,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4614, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4750, PETRI_PLACES=342, PETRI_TRANSITIONS=433} [2024-06-27 20:03:49,421 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-27 20:03:49,421 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 433 transitions, 4750 flow [2024-06-27 20:03:49,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:49,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:49,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:49,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:03:49,422 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:49,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:49,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1598325465, now seen corresponding path program 3 times [2024-06-27 20:03:49,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:49,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274015420] [2024-06-27 20:03:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:49,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:50,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:50,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274015420] [2024-06-27 20:03:50,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274015420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:50,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:50,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:50,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924306020] [2024-06-27 20:03:50,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:50,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:50,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:50,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:50,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:50,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:03:50,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 433 transitions, 4750 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:50,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:50,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:03:50,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:52,345 INFO L124 PetriNetUnfolderBase]: 4865/7475 cut-off events. [2024-06-27 20:03:52,345 INFO L125 PetriNetUnfolderBase]: For 2120175/2120190 co-relation queries the response was YES. [2024-06-27 20:03:52,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77864 conditions, 7475 events. 4865/7475 cut-off events. For 2120175/2120190 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 43208 event pairs, 940 based on Foata normal form. 2/7414 useless extension candidates. Maximal degree in co-relation 77697. Up to 7252 conditions per place. [2024-06-27 20:03:52,446 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 401 selfloop transitions, 19 changer transitions 0/448 dead transitions. [2024-06-27 20:03:52,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 448 transitions, 5682 flow [2024-06-27 20:03:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:52,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 20:03:52,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-27 20:03:52,447 INFO L175 Difference]: Start difference. First operand has 342 places, 433 transitions, 4750 flow. Second operand 8 states and 122 transitions. [2024-06-27 20:03:52,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 448 transitions, 5682 flow [2024-06-27 20:03:58,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 448 transitions, 5546 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:58,738 INFO L231 Difference]: Finished difference. Result has 344 places, 436 transitions, 4727 flow [2024-06-27 20:03:58,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4624, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4727, PETRI_PLACES=344, PETRI_TRANSITIONS=436} [2024-06-27 20:03:58,738 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-27 20:03:58,738 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 436 transitions, 4727 flow [2024-06-27 20:03:58,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:58,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:58,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:58,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:03:58,739 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:58,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1598310585, now seen corresponding path program 4 times [2024-06-27 20:03:58,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:58,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063171964] [2024-06-27 20:03:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:58,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:59,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:59,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063171964] [2024-06-27 20:03:59,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063171964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:59,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:59,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:59,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219854716] [2024-06-27 20:03:59,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:59,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:59,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:59,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:59,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:59,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:03:59,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 436 transitions, 4727 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:59,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:59,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:03:59,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:01,415 INFO L124 PetriNetUnfolderBase]: 4859/7469 cut-off events. [2024-06-27 20:04:01,416 INFO L125 PetriNetUnfolderBase]: For 2139115/2139138 co-relation queries the response was YES. [2024-06-27 20:04:01,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77699 conditions, 7469 events. 4859/7469 cut-off events. For 2139115/2139138 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 43210 event pairs, 946 based on Foata normal form. 10/7416 useless extension candidates. Maximal degree in co-relation 77531. Up to 7196 conditions per place. [2024-06-27 20:04:01,536 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 381 selfloop transitions, 41 changer transitions 0/450 dead transitions. [2024-06-27 20:04:01,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 450 transitions, 5609 flow [2024-06-27 20:04:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:01,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:04:01,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-27 20:04:01,537 INFO L175 Difference]: Start difference. First operand has 344 places, 436 transitions, 4727 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:04:01,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 450 transitions, 5609 flow [2024-06-27 20:04:08,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 450 transitions, 5468 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-27 20:04:08,448 INFO L231 Difference]: Finished difference. Result has 343 places, 436 transitions, 4674 flow [2024-06-27 20:04:08,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4586, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4674, PETRI_PLACES=343, PETRI_TRANSITIONS=436} [2024-06-27 20:04:08,448 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-27 20:04:08,449 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 436 transitions, 4674 flow [2024-06-27 20:04:08,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:08,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:08,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:08,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:04:08,449 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:08,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:08,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1970388704, now seen corresponding path program 6 times [2024-06-27 20:04:08,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:08,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827919900] [2024-06-27 20:04:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:08,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:09,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:09,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827919900] [2024-06-27 20:04:09,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827919900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:09,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:09,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:09,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718800848] [2024-06-27 20:04:09,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:09,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:09,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:09,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:09,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:09,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:04:09,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 436 transitions, 4674 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:09,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:09,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:04:09,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:11,065 INFO L124 PetriNetUnfolderBase]: 4853/7464 cut-off events. [2024-06-27 20:04:11,065 INFO L125 PetriNetUnfolderBase]: For 2158036/2158057 co-relation queries the response was YES. [2024-06-27 20:04:11,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77612 conditions, 7464 events. 4853/7464 cut-off events. For 2158036/2158057 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 43211 event pairs, 955 based on Foata normal form. 6/7407 useless extension candidates. Maximal degree in co-relation 77445. Up to 7128 conditions per place. [2024-06-27 20:04:11,187 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 368 selfloop transitions, 54 changer transitions 0/450 dead transitions. [2024-06-27 20:04:11,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 450 transitions, 5556 flow [2024-06-27 20:04:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:11,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:04:11,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-27 20:04:11,188 INFO L175 Difference]: Start difference. First operand has 343 places, 436 transitions, 4674 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:04:11,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 450 transitions, 5556 flow [2024-06-27 20:04:15,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 450 transitions, 5421 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 20:04:15,490 INFO L231 Difference]: Finished difference. Result has 344 places, 436 transitions, 4653 flow [2024-06-27 20:04:15,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4539, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4653, PETRI_PLACES=344, PETRI_TRANSITIONS=436} [2024-06-27 20:04:15,490 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-27 20:04:15,490 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 436 transitions, 4653 flow [2024-06-27 20:04:15,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:15,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:15,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:15,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:04:15,491 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:15,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:15,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1442892393, now seen corresponding path program 1 times [2024-06-27 20:04:15,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:15,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354036565] [2024-06-27 20:04:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:15,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:16,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:16,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354036565] [2024-06-27 20:04:16,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354036565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:16,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:16,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:16,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034877190] [2024-06-27 20:04:16,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:16,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:16,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:16,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:16,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:16,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:04:16,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 436 transitions, 4653 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:16,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:16,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:04:16,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:17,897 INFO L124 PetriNetUnfolderBase]: 4904/7544 cut-off events. [2024-06-27 20:04:17,897 INFO L125 PetriNetUnfolderBase]: For 1866902/1866906 co-relation queries the response was YES. [2024-06-27 20:04:17,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73016 conditions, 7544 events. 4904/7544 cut-off events. For 1866902/1866906 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 43600 event pairs, 920 based on Foata normal form. 1/7529 useless extension candidates. Maximal degree in co-relation 72848. Up to 7352 conditions per place. [2024-06-27 20:04:18,005 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 414 selfloop transitions, 35 changer transitions 0/463 dead transitions. [2024-06-27 20:04:18,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 463 transitions, 5949 flow [2024-06-27 20:04:18,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:18,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:04:18,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-27 20:04:18,006 INFO L175 Difference]: Start difference. First operand has 344 places, 436 transitions, 4653 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:04:18,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 463 transitions, 5949 flow [2024-06-27 20:04:21,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 463 transitions, 5787 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 20:04:21,861 INFO L231 Difference]: Finished difference. Result has 343 places, 442 transitions, 4677 flow [2024-06-27 20:04:21,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4677, PETRI_PLACES=343, PETRI_TRANSITIONS=442} [2024-06-27 20:04:21,861 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-27 20:04:21,861 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 442 transitions, 4677 flow [2024-06-27 20:04:21,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:21,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:21,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:21,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:04:21,862 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:21,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:21,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1442742663, now seen corresponding path program 2 times [2024-06-27 20:04:21,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:21,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386502662] [2024-06-27 20:04:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:21,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:22,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:22,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386502662] [2024-06-27 20:04:22,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386502662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:22,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:22,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:22,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716658418] [2024-06-27 20:04:22,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:22,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:22,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:22,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:22,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:22,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:04:22,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 442 transitions, 4677 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:22,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:22,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:04:22,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:24,388 INFO L124 PetriNetUnfolderBase]: 4909/7551 cut-off events. [2024-06-27 20:04:24,388 INFO L125 PetriNetUnfolderBase]: For 1895502/1895506 co-relation queries the response was YES. [2024-06-27 20:04:24,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73372 conditions, 7551 events. 4909/7551 cut-off events. For 1895502/1895506 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 43636 event pairs, 920 based on Foata normal form. 1/7536 useless extension candidates. Maximal degree in co-relation 73204. Up to 7358 conditions per place. [2024-06-27 20:04:24,491 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 413 selfloop transitions, 36 changer transitions 0/463 dead transitions. [2024-06-27 20:04:24,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 463 transitions, 5919 flow [2024-06-27 20:04:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:04:24,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-27 20:04:24,492 INFO L175 Difference]: Start difference. First operand has 343 places, 442 transitions, 4677 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:04:24,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 463 transitions, 5919 flow [2024-06-27 20:04:29,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 463 transitions, 5793 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-27 20:04:29,182 INFO L231 Difference]: Finished difference. Result has 347 places, 445 transitions, 4685 flow [2024-06-27 20:04:29,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4575, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4685, PETRI_PLACES=347, PETRI_TRANSITIONS=445} [2024-06-27 20:04:29,183 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-27 20:04:29,183 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 445 transitions, 4685 flow [2024-06-27 20:04:29,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:29,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:29,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:29,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:04:29,183 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:29,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:29,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1442742446, now seen corresponding path program 1 times [2024-06-27 20:04:29,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:29,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356254814] [2024-06-27 20:04:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:29,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:29,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:29,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356254814] [2024-06-27 20:04:29,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356254814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:29,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:29,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:29,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800314141] [2024-06-27 20:04:29,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:29,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:29,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:29,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:30,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:04:30,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 445 transitions, 4685 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:30,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:30,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:04:30,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:31,824 INFO L124 PetriNetUnfolderBase]: 4927/7578 cut-off events. [2024-06-27 20:04:31,824 INFO L125 PetriNetUnfolderBase]: For 1937560/1937564 co-relation queries the response was YES. [2024-06-27 20:04:31,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73666 conditions, 7578 events. 4927/7578 cut-off events. For 1937560/1937564 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 43870 event pairs, 921 based on Foata normal form. 2/7564 useless extension candidates. Maximal degree in co-relation 73496. Up to 7352 conditions per place. [2024-06-27 20:04:31,918 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 416 selfloop transitions, 42 changer transitions 0/472 dead transitions. [2024-06-27 20:04:31,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 472 transitions, 6023 flow [2024-06-27 20:04:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:04:31,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 20:04:31,919 INFO L175 Difference]: Start difference. First operand has 347 places, 445 transitions, 4685 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:04:31,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 472 transitions, 6023 flow [2024-06-27 20:04:36,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 472 transitions, 5950 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:04:36,680 INFO L231 Difference]: Finished difference. Result has 350 places, 451 transitions, 4828 flow [2024-06-27 20:04:36,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4612, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4828, PETRI_PLACES=350, PETRI_TRANSITIONS=451} [2024-06-27 20:04:36,681 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-27 20:04:36,681 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 451 transitions, 4828 flow [2024-06-27 20:04:36,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:36,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:36,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:36,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:04:36,681 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:36,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:36,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1437178473, now seen corresponding path program 3 times [2024-06-27 20:04:36,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:36,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107143663] [2024-06-27 20:04:36,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:36,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:37,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:37,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107143663] [2024-06-27 20:04:37,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107143663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:37,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:37,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:37,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037320712] [2024-06-27 20:04:37,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:37,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:37,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:37,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:37,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:37,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:04:37,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 451 transitions, 4828 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:37,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:37,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:04:37,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:39,071 INFO L124 PetriNetUnfolderBase]: 4932/7585 cut-off events. [2024-06-27 20:04:39,072 INFO L125 PetriNetUnfolderBase]: For 1961389/1961393 co-relation queries the response was YES. [2024-06-27 20:04:39,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74300 conditions, 7585 events. 4932/7585 cut-off events. For 1961389/1961393 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 43913 event pairs, 920 based on Foata normal form. 1/7570 useless extension candidates. Maximal degree in co-relation 74129. Up to 7389 conditions per place. [2024-06-27 20:04:39,192 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 417 selfloop transitions, 38 changer transitions 0/469 dead transitions. [2024-06-27 20:04:39,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 469 transitions, 6057 flow [2024-06-27 20:04:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:04:39,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-27 20:04:39,194 INFO L175 Difference]: Start difference. First operand has 350 places, 451 transitions, 4828 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:04:39,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 469 transitions, 6057 flow [2024-06-27 20:04:45,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 469 transitions, 5956 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 20:04:45,260 INFO L231 Difference]: Finished difference. Result has 354 places, 454 transitions, 4844 flow [2024-06-27 20:04:45,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4727, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4844, PETRI_PLACES=354, PETRI_TRANSITIONS=454} [2024-06-27 20:04:45,261 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-27 20:04:45,261 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 454 transitions, 4844 flow [2024-06-27 20:04:45,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:45,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:45,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:45,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:04:45,261 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:45,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:45,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1271873220, now seen corresponding path program 2 times [2024-06-27 20:04:45,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:45,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842109625] [2024-06-27 20:04:45,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:45,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:46,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:46,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842109625] [2024-06-27 20:04:46,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842109625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:46,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:46,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:46,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883673571] [2024-06-27 20:04:46,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:46,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:46,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:46,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:46,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:46,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:04:46,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 454 transitions, 4844 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:46,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:46,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:04:46,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:47,742 INFO L124 PetriNetUnfolderBase]: 4958/7621 cut-off events. [2024-06-27 20:04:47,742 INFO L125 PetriNetUnfolderBase]: For 2014419/2014423 co-relation queries the response was YES. [2024-06-27 20:04:47,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75055 conditions, 7621 events. 4958/7621 cut-off events. For 2014419/2014423 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 44096 event pairs, 923 based on Foata normal form. 2/7607 useless extension candidates. Maximal degree in co-relation 74882. Up to 7384 conditions per place. [2024-06-27 20:04:47,856 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 421 selfloop transitions, 45 changer transitions 0/480 dead transitions. [2024-06-27 20:04:47,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 480 transitions, 6438 flow [2024-06-27 20:04:47,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:04:47,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-27 20:04:47,857 INFO L175 Difference]: Start difference. First operand has 354 places, 454 transitions, 4844 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:04:47,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 480 transitions, 6438 flow [2024-06-27 20:04:53,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 480 transitions, 6362 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:04:53,822 INFO L231 Difference]: Finished difference. Result has 357 places, 460 transitions, 4972 flow [2024-06-27 20:04:53,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4768, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4972, PETRI_PLACES=357, PETRI_TRANSITIONS=460} [2024-06-27 20:04:53,822 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-27 20:04:53,822 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 460 transitions, 4972 flow [2024-06-27 20:04:53,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:53,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:53,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:53,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:04:53,823 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:53,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:53,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1437170816, now seen corresponding path program 3 times [2024-06-27 20:04:53,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:53,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852268802] [2024-06-27 20:04:53,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:53,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:54,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:54,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852268802] [2024-06-27 20:04:54,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852268802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:54,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:54,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:54,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247804074] [2024-06-27 20:04:54,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:54,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:54,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:54,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:54,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:54,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:04:54,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 460 transitions, 4972 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:54,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:54,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:04:54,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:56,424 INFO L124 PetriNetUnfolderBase]: 4985/7660 cut-off events. [2024-06-27 20:04:56,424 INFO L125 PetriNetUnfolderBase]: For 2038527/2038531 co-relation queries the response was YES. [2024-06-27 20:04:56,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75558 conditions, 7660 events. 4985/7660 cut-off events. For 2038527/2038531 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 44352 event pairs, 923 based on Foata normal form. 2/7646 useless extension candidates. Maximal degree in co-relation 75384. Up to 7418 conditions per place. [2024-06-27 20:04:56,586 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 418 selfloop transitions, 46 changer transitions 0/478 dead transitions. [2024-06-27 20:04:56,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 478 transitions, 6200 flow [2024-06-27 20:04:56,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:04:56,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-27 20:04:56,588 INFO L175 Difference]: Start difference. First operand has 357 places, 460 transitions, 4972 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:04:56,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 478 transitions, 6200 flow [2024-06-27 20:05:04,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 478 transitions, 6063 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 20:05:04,246 INFO L231 Difference]: Finished difference. Result has 361 places, 460 transitions, 4933 flow [2024-06-27 20:05:04,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4835, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4933, PETRI_PLACES=361, PETRI_TRANSITIONS=460} [2024-06-27 20:05:04,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-27 20:05:04,246 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 460 transitions, 4933 flow [2024-06-27 20:05:04,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:04,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:04,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:04,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:05:04,247 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:04,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash -265814238, now seen corresponding path program 4 times [2024-06-27 20:05:04,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:04,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806588966] [2024-06-27 20:05:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:04,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:04,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:04,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806588966] [2024-06-27 20:05:04,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806588966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:04,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:04,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:04,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839272025] [2024-06-27 20:05:04,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:04,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:04,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:04,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:04,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:05,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:05:05,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 460 transitions, 4933 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:05,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:05,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:05:05,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:06,868 INFO L124 PetriNetUnfolderBase]: 4978/7651 cut-off events. [2024-06-27 20:05:06,868 INFO L125 PetriNetUnfolderBase]: For 2075893/2075897 co-relation queries the response was YES. [2024-06-27 20:05:06,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75729 conditions, 7651 events. 4978/7651 cut-off events. For 2075893/2075897 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 44296 event pairs, 924 based on Foata normal form. 2/7637 useless extension candidates. Maximal degree in co-relation 75554. Up to 7457 conditions per place. [2024-06-27 20:05:06,976 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 437 selfloop transitions, 31 changer transitions 0/482 dead transitions. [2024-06-27 20:05:06,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 482 transitions, 6545 flow [2024-06-27 20:05:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:06,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:05:06,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:05:06,978 INFO L175 Difference]: Start difference. First operand has 361 places, 460 transitions, 4933 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:05:06,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 482 transitions, 6545 flow [2024-06-27 20:05:14,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 482 transitions, 6431 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:05:14,412 INFO L231 Difference]: Finished difference. Result has 362 places, 466 transitions, 5013 flow [2024-06-27 20:05:14,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4831, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5013, PETRI_PLACES=362, PETRI_TRANSITIONS=466} [2024-06-27 20:05:14,412 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-27 20:05:14,413 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 466 transitions, 5013 flow [2024-06-27 20:05:14,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:14,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:14,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:14,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:05:14,413 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:14,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:14,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1589290391, now seen corresponding path program 4 times [2024-06-27 20:05:14,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:14,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984336670] [2024-06-27 20:05:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:14,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:15,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:15,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984336670] [2024-06-27 20:05:15,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984336670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:15,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:15,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:15,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702934427] [2024-06-27 20:05:15,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:15,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:15,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:15,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:15,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:15,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:05:15,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 466 transitions, 5013 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:15,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:15,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:05:15,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:17,181 INFO L124 PetriNetUnfolderBase]: 5005/7691 cut-off events. [2024-06-27 20:05:17,181 INFO L125 PetriNetUnfolderBase]: For 2100218/2100222 co-relation queries the response was YES. [2024-06-27 20:05:17,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76286 conditions, 7691 events. 5005/7691 cut-off events. For 2100218/2100222 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 44628 event pairs, 930 based on Foata normal form. 1/7676 useless extension candidates. Maximal degree in co-relation 76110. Up to 7539 conditions per place. [2024-06-27 20:05:17,284 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 446 selfloop transitions, 17 changer transitions 0/477 dead transitions. [2024-06-27 20:05:17,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 477 transitions, 5965 flow [2024-06-27 20:05:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:17,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 20:05:17,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-27 20:05:17,285 INFO L175 Difference]: Start difference. First operand has 362 places, 466 transitions, 5013 flow. Second operand 8 states and 120 transitions. [2024-06-27 20:05:17,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 477 transitions, 5965 flow [2024-06-27 20:05:24,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 477 transitions, 5827 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 20:05:24,342 INFO L231 Difference]: Finished difference. Result has 365 places, 466 transitions, 4915 flow [2024-06-27 20:05:24,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4875, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4915, PETRI_PLACES=365, PETRI_TRANSITIONS=466} [2024-06-27 20:05:24,343 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-27 20:05:24,343 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 466 transitions, 4915 flow [2024-06-27 20:05:24,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:24,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:24,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:24,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:05:24,343 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:24,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:24,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1979408216, now seen corresponding path program 5 times [2024-06-27 20:05:24,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:24,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040641740] [2024-06-27 20:05:24,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:24,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:25,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:25,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040641740] [2024-06-27 20:05:25,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040641740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:25,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:25,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:25,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083878938] [2024-06-27 20:05:25,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:25,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:25,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:25,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:25,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:05:25,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 466 transitions, 4915 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:25,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:25,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:05:25,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:26,779 INFO L124 PetriNetUnfolderBase]: 4969/7639 cut-off events. [2024-06-27 20:05:26,779 INFO L125 PetriNetUnfolderBase]: For 2104340/2104344 co-relation queries the response was YES. [2024-06-27 20:05:26,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75486 conditions, 7639 events. 4969/7639 cut-off events. For 2104340/2104344 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 44172 event pairs, 920 based on Foata normal form. 2/7625 useless extension candidates. Maximal degree in co-relation 75309. Up to 7448 conditions per place. [2024-06-27 20:05:26,906 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 435 selfloop transitions, 32 changer transitions 0/481 dead transitions. [2024-06-27 20:05:26,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 481 transitions, 6147 flow [2024-06-27 20:05:26,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:26,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:05:26,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-27 20:05:26,907 INFO L175 Difference]: Start difference. First operand has 365 places, 466 transitions, 4915 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:05:26,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 481 transitions, 6147 flow [2024-06-27 20:05:33,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 481 transitions, 6029 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-27 20:05:33,731 INFO L231 Difference]: Finished difference. Result has 363 places, 466 transitions, 4867 flow [2024-06-27 20:05:33,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4797, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4867, PETRI_PLACES=363, PETRI_TRANSITIONS=466} [2024-06-27 20:05:33,731 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-27 20:05:33,731 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 466 transitions, 4867 flow [2024-06-27 20:05:33,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:33,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:33,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:33,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:05:33,732 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:33,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:33,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1598494818, now seen corresponding path program 6 times [2024-06-27 20:05:33,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:33,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062480015] [2024-06-27 20:05:33,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:33,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:34,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:34,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062480015] [2024-06-27 20:05:34,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062480015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:34,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:34,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:34,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450352560] [2024-06-27 20:05:34,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:34,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:34,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:34,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:34,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:34,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:05:34,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 466 transitions, 4867 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:34,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:34,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:05:34,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:36,201 INFO L124 PetriNetUnfolderBase]: 4971/7641 cut-off events. [2024-06-27 20:05:36,201 INFO L125 PetriNetUnfolderBase]: For 2126415/2126419 co-relation queries the response was YES. [2024-06-27 20:05:36,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75446 conditions, 7641 events. 4971/7641 cut-off events. For 2126415/2126419 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 44165 event pairs, 922 based on Foata normal form. 3/7628 useless extension candidates. Maximal degree in co-relation 75269. Up to 7475 conditions per place. [2024-06-27 20:05:36,318 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 446 selfloop transitions, 19 changer transitions 0/479 dead transitions. [2024-06-27 20:05:36,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 479 transitions, 5831 flow [2024-06-27 20:05:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 20:05:36,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-27 20:05:36,319 INFO L175 Difference]: Start difference. First operand has 363 places, 466 transitions, 4867 flow. Second operand 8 states and 122 transitions. [2024-06-27 20:05:36,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 479 transitions, 5831 flow [2024-06-27 20:05:43,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 479 transitions, 5717 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 20:05:43,807 INFO L231 Difference]: Finished difference. Result has 364 places, 466 transitions, 4797 flow [2024-06-27 20:05:43,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4753, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4797, PETRI_PLACES=364, PETRI_TRANSITIONS=466} [2024-06-27 20:05:43,808 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-27 20:05:43,808 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 466 transitions, 4797 flow [2024-06-27 20:05:43,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:43,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:43,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:43,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:05:43,808 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:43,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:43,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1598833431, now seen corresponding path program 1 times [2024-06-27 20:05:43,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:43,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074076481] [2024-06-27 20:05:43,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:43,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:44,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:44,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074076481] [2024-06-27 20:05:44,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074076481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:44,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:44,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:44,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760105428] [2024-06-27 20:05:44,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:44,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:44,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:44,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:44,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:44,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:05:44,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 466 transitions, 4797 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:44,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:44,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:05:44,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:46,643 INFO L124 PetriNetUnfolderBase]: 4935/7574 cut-off events. [2024-06-27 20:05:46,643 INFO L125 PetriNetUnfolderBase]: For 2495066/2495081 co-relation queries the response was YES. [2024-06-27 20:05:46,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80651 conditions, 7574 events. 4935/7574 cut-off events. For 2495066/2495081 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 43658 event pairs, 946 based on Foata normal form. 2/7513 useless extension candidates. Maximal degree in co-relation 80473. Up to 7319 conditions per place. [2024-06-27 20:05:46,763 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 428 selfloop transitions, 18 changer transitions 0/480 dead transitions. [2024-06-27 20:05:46,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 480 transitions, 5769 flow [2024-06-27 20:05:46,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:46,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 20:05:46,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35174418604651164 [2024-06-27 20:05:46,764 INFO L175 Difference]: Start difference. First operand has 364 places, 466 transitions, 4797 flow. Second operand 8 states and 121 transitions. [2024-06-27 20:05:46,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 480 transitions, 5769 flow [2024-06-27 20:05:51,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 480 transitions, 5704 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:05:51,841 INFO L231 Difference]: Finished difference. Result has 364 places, 468 transitions, 4829 flow [2024-06-27 20:05:51,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4732, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4829, PETRI_PLACES=364, PETRI_TRANSITIONS=468} [2024-06-27 20:05:51,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-27 20:05:51,842 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 468 transitions, 4829 flow [2024-06-27 20:05:51,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:51,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:51,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:51,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:05:51,842 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:51,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:51,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1002935137, now seen corresponding path program 1 times [2024-06-27 20:05:51,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:51,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030491879] [2024-06-27 20:05:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:51,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:52,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:52,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030491879] [2024-06-27 20:05:52,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030491879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:52,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:52,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:52,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983257868] [2024-06-27 20:05:52,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:52,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:52,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:52,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:52,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:52,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:05:52,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 468 transitions, 4829 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:52,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:52,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:05:52,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:54,843 INFO L124 PetriNetUnfolderBase]: 4949/7592 cut-off events. [2024-06-27 20:05:54,843 INFO L125 PetriNetUnfolderBase]: For 2529523/2529538 co-relation queries the response was YES. [2024-06-27 20:05:54,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81249 conditions, 7592 events. 4949/7592 cut-off events. For 2529523/2529538 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 43629 event pairs, 760 based on Foata normal form. 2/7531 useless extension candidates. Maximal degree in co-relation 81070. Up to 7224 conditions per place. [2024-06-27 20:05:54,965 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 435 selfloop transitions, 33 changer transitions 0/502 dead transitions. [2024-06-27 20:05:54,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 502 transitions, 6189 flow [2024-06-27 20:05:54,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:05:54,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-27 20:05:54,966 INFO L175 Difference]: Start difference. First operand has 364 places, 468 transitions, 4829 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:05:54,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 502 transitions, 6189 flow [2024-06-27 20:06:02,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 502 transitions, 6108 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:06:02,817 INFO L231 Difference]: Finished difference. Result has 366 places, 472 transitions, 4907 flow [2024-06-27 20:06:02,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4748, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4907, PETRI_PLACES=366, PETRI_TRANSITIONS=472} [2024-06-27 20:06:02,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-27 20:06:02,817 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 472 transitions, 4907 flow [2024-06-27 20:06:02,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:02,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:02,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:02,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:06:02,818 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:02,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:02,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1345532257, now seen corresponding path program 2 times [2024-06-27 20:06:02,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:02,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679755094] [2024-06-27 20:06:02,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:02,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:03,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:03,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679755094] [2024-06-27 20:06:03,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679755094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:03,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:03,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:03,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679607456] [2024-06-27 20:06:03,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:03,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:03,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:03,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:03,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:03,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:06:03,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 472 transitions, 4907 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:03,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:03,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:06:03,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:05,922 INFO L124 PetriNetUnfolderBase]: 4957/7604 cut-off events. [2024-06-27 20:06:05,923 INFO L125 PetriNetUnfolderBase]: For 2567271/2567286 co-relation queries the response was YES. [2024-06-27 20:06:06,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81803 conditions, 7604 events. 4957/7604 cut-off events. For 2567271/2567286 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 43909 event pairs, 941 based on Foata normal form. 2/7543 useless extension candidates. Maximal degree in co-relation 81623. Up to 7281 conditions per place. [2024-06-27 20:06:06,051 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 435 selfloop transitions, 31 changer transitions 0/500 dead transitions. [2024-06-27 20:06:06,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 500 transitions, 5953 flow [2024-06-27 20:06:06,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:06:06,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-27 20:06:06,052 INFO L175 Difference]: Start difference. First operand has 366 places, 472 transitions, 4907 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:06:06,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 500 transitions, 5953 flow [2024-06-27 20:06:12,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 500 transitions, 5838 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-27 20:06:12,736 INFO L231 Difference]: Finished difference. Result has 370 places, 474 transitions, 4909 flow [2024-06-27 20:06:12,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4814, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4909, PETRI_PLACES=370, PETRI_TRANSITIONS=474} [2024-06-27 20:06:12,736 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-27 20:06:12,736 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 474 transitions, 4909 flow [2024-06-27 20:06:12,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:12,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:12,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:12,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:06:12,737 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:12,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:12,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1005795073, now seen corresponding path program 1 times [2024-06-27 20:06:12,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:12,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522397543] [2024-06-27 20:06:12,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:12,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:13,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:13,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522397543] [2024-06-27 20:06:13,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522397543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:13,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:13,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:06:13,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677522583] [2024-06-27 20:06:13,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:13,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:06:13,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:06:13,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:06:13,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:06:13,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 474 transitions, 4909 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:13,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:13,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:06:13,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:15,464 INFO L124 PetriNetUnfolderBase]: 4983/7640 cut-off events. [2024-06-27 20:06:15,464 INFO L125 PetriNetUnfolderBase]: For 2622365/2622380 co-relation queries the response was YES. [2024-06-27 20:06:15,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82602 conditions, 7640 events. 4983/7640 cut-off events. For 2622365/2622380 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 44128 event pairs, 931 based on Foata normal form. 2/7579 useless extension candidates. Maximal degree in co-relation 82420. Up to 7284 conditions per place. [2024-06-27 20:06:15,581 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 438 selfloop transitions, 44 changer transitions 0/516 dead transitions. [2024-06-27 20:06:15,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 516 transitions, 6414 flow [2024-06-27 20:06:15,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:06:15,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-27 20:06:15,582 INFO L175 Difference]: Start difference. First operand has 370 places, 474 transitions, 4909 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:06:15,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 516 transitions, 6414 flow [2024-06-27 20:06:24,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 516 transitions, 6327 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:06:24,399 INFO L231 Difference]: Finished difference. Result has 373 places, 487 transitions, 5133 flow [2024-06-27 20:06:24,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4834, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5133, PETRI_PLACES=373, PETRI_TRANSITIONS=487} [2024-06-27 20:06:24,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-27 20:06:24,399 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 487 transitions, 5133 flow [2024-06-27 20:06:24,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:24,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:24,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:24,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:06:24,400 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:24,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1013413633, now seen corresponding path program 2 times [2024-06-27 20:06:24,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:24,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970283194] [2024-06-27 20:06:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:24,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:25,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:25,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970283194] [2024-06-27 20:06:25,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970283194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:25,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:25,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:06:25,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341996855] [2024-06-27 20:06:25,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:25,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:06:25,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:25,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:06:25,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:06:25,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:06:25,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 487 transitions, 5133 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:25,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:25,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:06:25,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:27,069 INFO L124 PetriNetUnfolderBase]: 4993/7654 cut-off events. [2024-06-27 20:06:27,069 INFO L125 PetriNetUnfolderBase]: For 2665309/2665324 co-relation queries the response was YES. [2024-06-27 20:06:27,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83961 conditions, 7654 events. 4993/7654 cut-off events. For 2665309/2665324 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 44207 event pairs, 943 based on Foata normal form. 2/7593 useless extension candidates. Maximal degree in co-relation 83777. Up to 7331 conditions per place. [2024-06-27 20:06:27,193 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 441 selfloop transitions, 40 changer transitions 0/515 dead transitions. [2024-06-27 20:06:27,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 515 transitions, 6240 flow [2024-06-27 20:06:27,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:27,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:27,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:06:27,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-27 20:06:27,194 INFO L175 Difference]: Start difference. First operand has 373 places, 487 transitions, 5133 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:06:27,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 515 transitions, 6240 flow [2024-06-27 20:06:36,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 515 transitions, 6118 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-06-27 20:06:36,410 INFO L231 Difference]: Finished difference. Result has 379 places, 491 transitions, 5186 flow [2024-06-27 20:06:36,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5037, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5186, PETRI_PLACES=379, PETRI_TRANSITIONS=491} [2024-06-27 20:06:36,411 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-27 20:06:36,411 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 491 transitions, 5186 flow [2024-06-27 20:06:36,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:36,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:36,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:36,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:06:36,412 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:36,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:36,412 INFO L85 PathProgramCache]: Analyzing trace with hash -549130943, now seen corresponding path program 1 times [2024-06-27 20:06:36,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:36,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998774669] [2024-06-27 20:06:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:36,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:37,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:37,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998774669] [2024-06-27 20:06:37,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998774669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:37,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:37,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:37,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965087836] [2024-06-27 20:06:37,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:37,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:37,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:37,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:37,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:37,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:06:37,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 491 transitions, 5186 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:37,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:37,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:06:37,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:39,432 INFO L124 PetriNetUnfolderBase]: 5013/7682 cut-off events. [2024-06-27 20:06:39,433 INFO L125 PetriNetUnfolderBase]: For 2720880/2720895 co-relation queries the response was YES. [2024-06-27 20:06:39,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83972 conditions, 7682 events. 5013/7682 cut-off events. For 2720880/2720895 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44398 event pairs, 944 based on Foata normal form. 4/7623 useless extension candidates. Maximal degree in co-relation 83786. Up to 7207 conditions per place. [2024-06-27 20:06:39,554 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 422 selfloop transitions, 72 changer transitions 0/528 dead transitions. [2024-06-27 20:06:39,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 528 transitions, 6656 flow [2024-06-27 20:06:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:06:39,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 20:06:39,555 INFO L175 Difference]: Start difference. First operand has 379 places, 491 transitions, 5186 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:06:39,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 528 transitions, 6656 flow [2024-06-27 20:06:46,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 528 transitions, 6542 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 20:06:46,877 INFO L231 Difference]: Finished difference. Result has 383 places, 497 transitions, 5352 flow [2024-06-27 20:06:46,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5072, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5352, PETRI_PLACES=383, PETRI_TRANSITIONS=497} [2024-06-27 20:06:46,877 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-27 20:06:46,877 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 497 transitions, 5352 flow [2024-06-27 20:06:46,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:46,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:46,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:46,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:06:46,878 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:46,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:46,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1121086243, now seen corresponding path program 3 times [2024-06-27 20:06:46,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:46,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028115577] [2024-06-27 20:06:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:46,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:47,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:47,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028115577] [2024-06-27 20:06:47,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028115577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:47,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:47,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:06:47,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67124113] [2024-06-27 20:06:47,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:47,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:06:47,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:47,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:06:47,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:06:47,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:06:47,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 497 transitions, 5352 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:47,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:47,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:06:47,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:49,597 INFO L124 PetriNetUnfolderBase]: 5047/7729 cut-off events. [2024-06-27 20:06:49,597 INFO L125 PetriNetUnfolderBase]: For 2773163/2773178 co-relation queries the response was YES. [2024-06-27 20:06:49,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85640 conditions, 7729 events. 5047/7729 cut-off events. For 2773163/2773178 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44714 event pairs, 928 based on Foata normal form. 2/7668 useless extension candidates. Maximal degree in co-relation 85453. Up to 7293 conditions per place. [2024-06-27 20:06:49,730 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 434 selfloop transitions, 66 changer transitions 0/534 dead transitions. [2024-06-27 20:06:49,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 534 transitions, 7202 flow [2024-06-27 20:06:49,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:49,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:06:49,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 20:06:49,732 INFO L175 Difference]: Start difference. First operand has 383 places, 497 transitions, 5352 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:06:49,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 534 transitions, 7202 flow [2024-06-27 20:06:56,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 534 transitions, 7079 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 20:06:56,705 INFO L231 Difference]: Finished difference. Result has 386 places, 506 transitions, 5601 flow [2024-06-27 20:06:56,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5229, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5601, PETRI_PLACES=386, PETRI_TRANSITIONS=506} [2024-06-27 20:06:56,705 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-27 20:06:56,706 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 506 transitions, 5601 flow [2024-06-27 20:06:56,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:56,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:56,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:56,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:06:56,706 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:56,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:56,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1349339119, now seen corresponding path program 1 times [2024-06-27 20:06:56,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:56,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046173682] [2024-06-27 20:06:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:56,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:57,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:57,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046173682] [2024-06-27 20:06:57,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046173682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:57,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:57,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:06:57,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020644872] [2024-06-27 20:06:57,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:57,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:06:57,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:57,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:06:57,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:06:57,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 20:06:57,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 506 transitions, 5601 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:57,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:57,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 20:06:57,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:59,390 INFO L124 PetriNetUnfolderBase]: 5341/8073 cut-off events. [2024-06-27 20:06:59,390 INFO L125 PetriNetUnfolderBase]: For 2818714/2818714 co-relation queries the response was YES. [2024-06-27 20:06:59,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88341 conditions, 8073 events. 5341/8073 cut-off events. For 2818714/2818714 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 45695 event pairs, 1027 based on Foata normal form. 1/8074 useless extension candidates. Maximal degree in co-relation 88152. Up to 7999 conditions per place. [2024-06-27 20:06:59,519 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 498 selfloop transitions, 35 changer transitions 0/536 dead transitions. [2024-06-27 20:06:59,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 536 transitions, 7163 flow [2024-06-27 20:06:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:06:59,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-27 20:06:59,520 INFO L175 Difference]: Start difference. First operand has 386 places, 506 transitions, 5601 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:06:59,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 536 transitions, 7163 flow [2024-06-27 20:07:08,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 536 transitions, 7006 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-27 20:07:08,427 INFO L231 Difference]: Finished difference. Result has 391 places, 512 transitions, 5686 flow [2024-06-27 20:07:08,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5444, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5686, PETRI_PLACES=391, PETRI_TRANSITIONS=512} [2024-06-27 20:07:08,427 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-27 20:07:08,427 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 512 transitions, 5686 flow [2024-06-27 20:07:08,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:08,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:08,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:08,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:07:08,427 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:08,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:08,428 INFO L85 PathProgramCache]: Analyzing trace with hash -441109769, now seen corresponding path program 1 times [2024-06-27 20:07:08,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:08,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737628867] [2024-06-27 20:07:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:08,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:09,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:09,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737628867] [2024-06-27 20:07:09,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737628867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:09,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:09,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:09,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999229178] [2024-06-27 20:07:09,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:09,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:09,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:09,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:09,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:09,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:07:09,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 512 transitions, 5686 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:09,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:09,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:07:09,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:11,207 INFO L124 PetriNetUnfolderBase]: 5073/7765 cut-off events. [2024-06-27 20:07:11,207 INFO L125 PetriNetUnfolderBase]: For 2867488/2867503 co-relation queries the response was YES. [2024-06-27 20:07:11,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87503 conditions, 7765 events. 5073/7765 cut-off events. For 2867488/2867503 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 44882 event pairs, 952 based on Foata normal form. 1/7703 useless extension candidates. Maximal degree in co-relation 87312. Up to 7448 conditions per place. [2024-06-27 20:07:11,339 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 463 selfloop transitions, 40 changer transitions 0/539 dead transitions. [2024-06-27 20:07:11,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 539 transitions, 7162 flow [2024-06-27 20:07:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:11,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:07:11,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 20:07:11,340 INFO L175 Difference]: Start difference. First operand has 391 places, 512 transitions, 5686 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:07:11,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 539 transitions, 7162 flow [2024-06-27 20:07:20,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 539 transitions, 7024 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-27 20:07:20,624 INFO L231 Difference]: Finished difference. Result has 395 places, 518 transitions, 5780 flow [2024-06-27 20:07:20,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5548, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5780, PETRI_PLACES=395, PETRI_TRANSITIONS=518} [2024-06-27 20:07:20,624 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-27 20:07:20,624 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 518 transitions, 5780 flow [2024-06-27 20:07:20,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:20,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:20,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:20,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:07:20,625 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:20,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:20,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1803864631, now seen corresponding path program 4 times [2024-06-27 20:07:20,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:20,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993268814] [2024-06-27 20:07:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:20,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:21,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:21,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993268814] [2024-06-27 20:07:21,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993268814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:21,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:21,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:21,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545002162] [2024-06-27 20:07:21,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:21,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:21,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:21,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:21,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:21,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:07:21,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 518 transitions, 5780 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:21,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:21,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:07:21,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:23,401 INFO L124 PetriNetUnfolderBase]: 5089/7788 cut-off events. [2024-06-27 20:07:23,401 INFO L125 PetriNetUnfolderBase]: For 2929354/2929369 co-relation queries the response was YES. [2024-06-27 20:07:23,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88462 conditions, 7788 events. 5089/7788 cut-off events. For 2929354/2929369 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 45040 event pairs, 926 based on Foata normal form. 2/7727 useless extension candidates. Maximal degree in co-relation 88269. Up to 7343 conditions per place. [2024-06-27 20:07:23,534 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 441 selfloop transitions, 72 changer transitions 0/549 dead transitions. [2024-06-27 20:07:23,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 549 transitions, 7542 flow [2024-06-27 20:07:23,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:23,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:07:23,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-27 20:07:23,535 INFO L175 Difference]: Start difference. First operand has 395 places, 518 transitions, 5780 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:07:23,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 549 transitions, 7542 flow [2024-06-27 20:07:37,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 549 transitions, 7430 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 20:07:37,207 INFO L231 Difference]: Finished difference. Result has 399 places, 524 transitions, 5928 flow [2024-06-27 20:07:37,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5668, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5928, PETRI_PLACES=399, PETRI_TRANSITIONS=524} [2024-06-27 20:07:37,207 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-27 20:07:37,207 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 524 transitions, 5928 flow [2024-06-27 20:07:37,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:37,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:37,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:37,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:07:37,208 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:37,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash -441110017, now seen corresponding path program 2 times [2024-06-27 20:07:37,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:37,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707361667] [2024-06-27 20:07:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:37,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:37,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:37,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707361667] [2024-06-27 20:07:37,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707361667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:37,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:37,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:37,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988438495] [2024-06-27 20:07:37,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:37,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:37,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:37,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:37,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:38,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 20:07:38,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 524 transitions, 5928 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:38,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:38,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 20:07:38,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:40,015 INFO L124 PetriNetUnfolderBase]: 5377/8123 cut-off events. [2024-06-27 20:07:40,015 INFO L125 PetriNetUnfolderBase]: For 2961983/2961983 co-relation queries the response was YES. [2024-06-27 20:07:40,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90624 conditions, 8123 events. 5377/8123 cut-off events. For 2961983/2961983 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 45965 event pairs, 1026 based on Foata normal form. 1/8124 useless extension candidates. Maximal degree in co-relation 90429. Up to 8048 conditions per place. [2024-06-27 20:07:40,161 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 509 selfloop transitions, 36 changer transitions 0/548 dead transitions. [2024-06-27 20:07:40,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 548 transitions, 7406 flow [2024-06-27 20:07:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:07:40,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-27 20:07:40,162 INFO L175 Difference]: Start difference. First operand has 399 places, 524 transitions, 5928 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:07:40,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 548 transitions, 7406 flow [2024-06-27 20:07:50,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 548 transitions, 7274 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 20:07:50,255 INFO L231 Difference]: Finished difference. Result has 403 places, 527 transitions, 5928 flow [2024-06-27 20:07:50,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5928, PETRI_PLACES=403, PETRI_TRANSITIONS=527} [2024-06-27 20:07:50,255 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-27 20:07:50,255 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 527 transitions, 5928 flow [2024-06-27 20:07:50,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:50,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:50,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:50,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:07:50,256 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:50,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1357499683, now seen corresponding path program 5 times [2024-06-27 20:07:50,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:50,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513735062] [2024-06-27 20:07:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:50,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:50,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:50,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513735062] [2024-06-27 20:07:50,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513735062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:50,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:50,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:50,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145753732] [2024-06-27 20:07:50,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:50,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:50,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:50,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:50,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:51,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:07:51,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 527 transitions, 5928 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:51,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:51,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:07:51,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:52,990 INFO L124 PetriNetUnfolderBase]: 5104/7809 cut-off events. [2024-06-27 20:07:52,990 INFO L125 PetriNetUnfolderBase]: For 3009783/3009798 co-relation queries the response was YES. [2024-06-27 20:07:53,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89198 conditions, 7809 events. 5104/7809 cut-off events. For 3009783/3009798 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 45148 event pairs, 951 based on Foata normal form. 2/7748 useless extension candidates. Maximal degree in co-relation 89002. Up to 7481 conditions per place. [2024-06-27 20:07:53,130 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 474 selfloop transitions, 38 changer transitions 0/549 dead transitions. [2024-06-27 20:07:53,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 549 transitions, 7070 flow [2024-06-27 20:07:53,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:07:53,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-27 20:07:53,131 INFO L175 Difference]: Start difference. First operand has 403 places, 527 transitions, 5928 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:07:53,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 549 transitions, 7070 flow [2024-06-27 20:08:05,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 549 transitions, 6975 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 20:08:05,448 INFO L231 Difference]: Finished difference. Result has 407 places, 531 transitions, 5999 flow [2024-06-27 20:08:05,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5833, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5999, PETRI_PLACES=407, PETRI_TRANSITIONS=531} [2024-06-27 20:08:05,449 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-27 20:08:05,449 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 531 transitions, 5999 flow [2024-06-27 20:08:05,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:05,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:05,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:05,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:08:05,450 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:05,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:05,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1357916757, now seen corresponding path program 2 times [2024-06-27 20:08:05,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:05,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80033330] [2024-06-27 20:08:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:05,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:06,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:06,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80033330] [2024-06-27 20:08:06,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80033330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:06,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:06,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:06,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414749687] [2024-06-27 20:08:06,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:06,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:06,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:06,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:06,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:06,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:08:06,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 531 transitions, 5999 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:06,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:06,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:08:06,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:08,214 INFO L124 PetriNetUnfolderBase]: 5109/7816 cut-off events. [2024-06-27 20:08:08,215 INFO L125 PetriNetUnfolderBase]: For 3040115/3040130 co-relation queries the response was YES. [2024-06-27 20:08:08,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89556 conditions, 7816 events. 5109/7816 cut-off events. For 3040115/3040130 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 45201 event pairs, 952 based on Foata normal form. 1/7754 useless extension candidates. Maximal degree in co-relation 89358. Up to 7529 conditions per place. [2024-06-27 20:08:08,360 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 485 selfloop transitions, 29 changer transitions 0/551 dead transitions. [2024-06-27 20:08:08,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 551 transitions, 7129 flow [2024-06-27 20:08:08,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:08,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:08:08,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-27 20:08:08,361 INFO L175 Difference]: Start difference. First operand has 407 places, 531 transitions, 5999 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:08:08,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 551 transitions, 7129 flow [2024-06-27 20:08:20,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 551 transitions, 7030 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 20:08:20,368 INFO L231 Difference]: Finished difference. Result has 411 places, 534 transitions, 6030 flow [2024-06-27 20:08:20,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5900, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6030, PETRI_PLACES=411, PETRI_TRANSITIONS=534} [2024-06-27 20:08:20,369 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-27 20:08:20,369 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 534 transitions, 6030 flow [2024-06-27 20:08:20,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:20,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:20,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:20,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:08:20,370 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:20,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:20,370 INFO L85 PathProgramCache]: Analyzing trace with hash -204934657, now seen corresponding path program 3 times [2024-06-27 20:08:20,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:20,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899744142] [2024-06-27 20:08:20,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:20,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:21,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:21,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899744142] [2024-06-27 20:08:21,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899744142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:21,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:21,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:21,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741446538] [2024-06-27 20:08:21,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:21,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:21,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:21,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:21,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:21,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 20:08:21,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 534 transitions, 6030 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:21,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:21,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 20:08:21,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:23,105 INFO L124 PetriNetUnfolderBase]: 5397/8151 cut-off events. [2024-06-27 20:08:23,105 INFO L125 PetriNetUnfolderBase]: For 3083124/3083124 co-relation queries the response was YES. [2024-06-27 20:08:23,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91499 conditions, 8151 events. 5397/8151 cut-off events. For 3083124/3083124 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 46133 event pairs, 1026 based on Foata normal form. 1/8152 useless extension candidates. Maximal degree in co-relation 91300. Up to 8109 conditions per place. [2024-06-27 20:08:23,252 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 529 selfloop transitions, 22 changer transitions 0/554 dead transitions. [2024-06-27 20:08:23,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 554 transitions, 7231 flow [2024-06-27 20:08:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:23,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:23,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 20:08:23,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35174418604651164 [2024-06-27 20:08:23,253 INFO L175 Difference]: Start difference. First operand has 411 places, 534 transitions, 6030 flow. Second operand 8 states and 121 transitions. [2024-06-27 20:08:23,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 554 transitions, 7231 flow [2024-06-27 20:08:34,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 554 transitions, 7129 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:08:34,509 INFO L231 Difference]: Finished difference. Result has 413 places, 537 transitions, 6041 flow [2024-06-27 20:08:34,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6041, PETRI_PLACES=413, PETRI_TRANSITIONS=537} [2024-06-27 20:08:34,510 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-27 20:08:34,510 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 537 transitions, 6041 flow [2024-06-27 20:08:34,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:34,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:34,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:34,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:08:34,510 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:34,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:34,511 INFO L85 PathProgramCache]: Analyzing trace with hash -204934409, now seen corresponding path program 3 times [2024-06-27 20:08:34,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:34,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811579784] [2024-06-27 20:08:34,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:34,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:35,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:35,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811579784] [2024-06-27 20:08:35,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811579784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:35,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:35,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:35,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605466242] [2024-06-27 20:08:35,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:35,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:35,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:35,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:35,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:35,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:08:35,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 537 transitions, 6041 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:35,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:35,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:08:35,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:37,316 INFO L124 PetriNetUnfolderBase]: 5119/7830 cut-off events. [2024-06-27 20:08:37,316 INFO L125 PetriNetUnfolderBase]: For 3121632/3121647 co-relation queries the response was YES. [2024-06-27 20:08:37,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90142 conditions, 7830 events. 5119/7830 cut-off events. For 3121632/3121647 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 45307 event pairs, 952 based on Foata normal form. 1/7768 useless extension candidates. Maximal degree in co-relation 89942. Up to 7535 conditions per place. [2024-06-27 20:08:37,461 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 485 selfloop transitions, 34 changer transitions 0/557 dead transitions. [2024-06-27 20:08:37,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 557 transitions, 7187 flow [2024-06-27 20:08:37,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:08:37,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-27 20:08:37,462 INFO L175 Difference]: Start difference. First operand has 413 places, 537 transitions, 6041 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:08:37,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 557 transitions, 7187 flow [2024-06-27 20:08:51,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 557 transitions, 7105 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 20:08:51,575 INFO L231 Difference]: Finished difference. Result has 415 places, 540 transitions, 6105 flow [2024-06-27 20:08:51,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5959, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6105, PETRI_PLACES=415, PETRI_TRANSITIONS=540} [2024-06-27 20:08:51,576 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-27 20:08:51,576 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 540 transitions, 6105 flow [2024-06-27 20:08:51,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:51,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:51,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:51,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:08:51,577 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:51,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:51,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1517095635, now seen corresponding path program 6 times [2024-06-27 20:08:51,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:51,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194860532] [2024-06-27 20:08:51,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:51,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:52,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:52,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194860532] [2024-06-27 20:08:52,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194860532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:52,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:52,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:52,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576787959] [2024-06-27 20:08:52,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:52,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:52,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:52,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:52,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:52,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:08:52,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 540 transitions, 6105 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:52,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:52,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:08:52,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:54,434 INFO L124 PetriNetUnfolderBase]: 5137/7855 cut-off events. [2024-06-27 20:08:54,434 INFO L125 PetriNetUnfolderBase]: For 3184444/3184459 co-relation queries the response was YES. [2024-06-27 20:08:54,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90775 conditions, 7855 events. 5137/7855 cut-off events. For 3184444/3184459 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 45388 event pairs, 951 based on Foata normal form. 2/7794 useless extension candidates. Maximal degree in co-relation 90574. Up to 7504 conditions per place. [2024-06-27 20:08:54,564 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 480 selfloop transitions, 48 changer transitions 0/566 dead transitions. [2024-06-27 20:08:54,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 566 transitions, 7621 flow [2024-06-27 20:08:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:08:54,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 20:08:54,565 INFO L175 Difference]: Start difference. First operand has 415 places, 540 transitions, 6105 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:08:54,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 566 transitions, 7621 flow [2024-06-27 20:09:09,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 566 transitions, 7503 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 20:09:09,277 INFO L231 Difference]: Finished difference. Result has 418 places, 546 transitions, 6234 flow [2024-06-27 20:09:09,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5987, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6234, PETRI_PLACES=418, PETRI_TRANSITIONS=546} [2024-06-27 20:09:09,277 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-27 20:09:09,277 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 546 transitions, 6234 flow [2024-06-27 20:09:09,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:09,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:09,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:09,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:09:09,277 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:09,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:09,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1376743889, now seen corresponding path program 1 times [2024-06-27 20:09:09,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:09,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104178491] [2024-06-27 20:09:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:09,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:10,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:10,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104178491] [2024-06-27 20:09:10,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104178491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:10,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:10,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:09:10,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071189156] [2024-06-27 20:09:10,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:10,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:09:10,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:10,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:09:10,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:09:10,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:09:10,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 546 transitions, 6234 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:10,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:10,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:09:10,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:13,317 INFO L124 PetriNetUnfolderBase]: 5473/8358 cut-off events. [2024-06-27 20:09:13,317 INFO L125 PetriNetUnfolderBase]: For 3480237/3480237 co-relation queries the response was YES. [2024-06-27 20:09:13,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96421 conditions, 8358 events. 5473/8358 cut-off events. For 3480237/3480237 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 48533 event pairs, 975 based on Foata normal form. 16/8361 useless extension candidates. Maximal degree in co-relation 96218. Up to 7100 conditions per place. [2024-06-27 20:09:13,457 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 486 selfloop transitions, 77 changer transitions 0/609 dead transitions. [2024-06-27 20:09:13,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 609 transitions, 8276 flow [2024-06-27 20:09:13,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:09:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:09:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-27 20:09:13,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249471458773784 [2024-06-27 20:09:13,458 INFO L175 Difference]: Start difference. First operand has 418 places, 546 transitions, 6234 flow. Second operand 11 states and 201 transitions. [2024-06-27 20:09:13,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 609 transitions, 8276 flow [2024-06-27 20:09:25,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 609 transitions, 8155 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 20:09:25,269 INFO L231 Difference]: Finished difference. Result has 425 places, 552 transitions, 6533 flow [2024-06-27 20:09:25,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6113, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6533, PETRI_PLACES=425, PETRI_TRANSITIONS=552} [2024-06-27 20:09:25,270 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-27 20:09:25,270 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 552 transitions, 6533 flow [2024-06-27 20:09:25,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:25,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:25,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:25,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:09:25,270 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:25,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:25,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1795713367, now seen corresponding path program 3 times [2024-06-27 20:09:25,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:25,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69188275] [2024-06-27 20:09:25,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:25,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:26,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:26,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69188275] [2024-06-27 20:09:26,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69188275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:26,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:26,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:26,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001466714] [2024-06-27 20:09:26,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:26,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:26,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:26,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:26,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:26,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:09:26,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 552 transitions, 6533 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:26,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:26,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:09:26,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:29,395 INFO L124 PetriNetUnfolderBase]: 5332/8176 cut-off events. [2024-06-27 20:09:29,395 INFO L125 PetriNetUnfolderBase]: For 3393114/3393129 co-relation queries the response was YES. [2024-06-27 20:09:29,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95955 conditions, 8176 events. 5332/8176 cut-off events. For 3393114/3393129 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 47949 event pairs, 1020 based on Foata normal form. 2/8115 useless extension candidates. Maximal degree in co-relation 95750. Up to 7846 conditions per place. [2024-06-27 20:09:29,528 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 498 selfloop transitions, 36 changer transitions 0/572 dead transitions. [2024-06-27 20:09:29,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 572 transitions, 7673 flow [2024-06-27 20:09:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:09:29,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-27 20:09:29,529 INFO L175 Difference]: Start difference. First operand has 425 places, 552 transitions, 6533 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:09:29,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 572 transitions, 7673 flow [2024-06-27 20:09:39,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 572 transitions, 7517 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 20:09:39,704 INFO L231 Difference]: Finished difference. Result has 427 places, 554 transitions, 6486 flow [2024-06-27 20:09:39,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6377, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6486, PETRI_PLACES=427, PETRI_TRANSITIONS=554} [2024-06-27 20:09:39,704 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-27 20:09:39,704 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 554 transitions, 6486 flow [2024-06-27 20:09:39,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:39,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:39,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:39,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:09:39,705 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:39,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:39,705 INFO L85 PathProgramCache]: Analyzing trace with hash -205044893, now seen corresponding path program 2 times [2024-06-27 20:09:39,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:39,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874185524] [2024-06-27 20:09:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:39,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:40,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:40,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874185524] [2024-06-27 20:09:40,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874185524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:40,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:40,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:40,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54557429] [2024-06-27 20:09:40,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:40,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:40,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:40,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:40,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:40,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:09:40,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 554 transitions, 6486 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:40,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:40,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:09:40,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:43,590 INFO L124 PetriNetUnfolderBase]: 5384/8248 cut-off events. [2024-06-27 20:09:43,590 INFO L125 PetriNetUnfolderBase]: For 3483937/3483952 co-relation queries the response was YES. [2024-06-27 20:09:43,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96648 conditions, 8248 events. 5384/8248 cut-off events. For 3483937/3483952 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 48318 event pairs, 1025 based on Foata normal form. 4/8189 useless extension candidates. Maximal degree in co-relation 96441. Up to 7734 conditions per place. [2024-06-27 20:09:43,724 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 479 selfloop transitions, 72 changer transitions 0/589 dead transitions. [2024-06-27 20:09:43,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 589 transitions, 8380 flow [2024-06-27 20:09:43,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:09:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:09:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:09:43,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 20:09:43,725 INFO L175 Difference]: Start difference. First operand has 427 places, 554 transitions, 6486 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:09:43,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 589 transitions, 8380 flow [2024-06-27 20:09:53,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 589 transitions, 8291 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:09:53,636 INFO L231 Difference]: Finished difference. Result has 430 places, 560 transitions, 6659 flow [2024-06-27 20:09:53,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6397, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6659, PETRI_PLACES=430, PETRI_TRANSITIONS=560} [2024-06-27 20:09:53,637 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-27 20:09:53,637 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 560 transitions, 6659 flow [2024-06-27 20:09:53,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:53,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:53,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:53,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:09:53,638 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:53,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash -204627323, now seen corresponding path program 3 times [2024-06-27 20:09:53,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:53,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831269381] [2024-06-27 20:09:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:53,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:54,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:54,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831269381] [2024-06-27 20:09:54,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831269381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:54,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:54,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:54,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955233183] [2024-06-27 20:09:54,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:54,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:54,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:54,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:54,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:54,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:09:54,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 560 transitions, 6659 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:54,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:54,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:09:54,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:57,522 INFO L124 PetriNetUnfolderBase]: 5404/8276 cut-off events. [2024-06-27 20:09:57,522 INFO L125 PetriNetUnfolderBase]: For 3529479/3529494 co-relation queries the response was YES. [2024-06-27 20:09:57,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97294 conditions, 8276 events. 5404/8276 cut-off events. For 3529479/3529494 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 48494 event pairs, 1019 based on Foata normal form. 4/8217 useless extension candidates. Maximal degree in co-relation 97086. Up to 7750 conditions per place. [2024-06-27 20:09:57,655 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 473 selfloop transitions, 79 changer transitions 0/590 dead transitions. [2024-06-27 20:09:57,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 590 transitions, 8501 flow [2024-06-27 20:09:57,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:09:57,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:09:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:09:57,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-27 20:09:57,656 INFO L175 Difference]: Start difference. First operand has 430 places, 560 transitions, 6659 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:09:57,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 590 transitions, 8501 flow [2024-06-27 20:10:08,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 590 transitions, 8348 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 20:10:08,821 INFO L231 Difference]: Finished difference. Result has 434 places, 563 transitions, 6732 flow [2024-06-27 20:10:08,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6515, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6732, PETRI_PLACES=434, PETRI_TRANSITIONS=563} [2024-06-27 20:10:08,821 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 390 predicate places. [2024-06-27 20:10:08,821 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 563 transitions, 6732 flow [2024-06-27 20:10:08,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:08,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:08,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:08,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:10:08,822 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:08,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:08,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1357913223, now seen corresponding path program 4 times [2024-06-27 20:10:08,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:08,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180388764] [2024-06-27 20:10:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:08,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:09,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:09,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180388764] [2024-06-27 20:10:09,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180388764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:09,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:09,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:09,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271680295] [2024-06-27 20:10:09,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:09,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:09,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:09,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:09,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:09,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:10:09,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 563 transitions, 6732 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:09,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:09,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:10:09,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:12,796 INFO L124 PetriNetUnfolderBase]: 5392/8260 cut-off events. [2024-06-27 20:10:12,796 INFO L125 PetriNetUnfolderBase]: For 3528064/3528079 co-relation queries the response was YES. [2024-06-27 20:10:12,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96774 conditions, 8260 events. 5392/8260 cut-off events. For 3528064/3528079 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48390 event pairs, 1021 based on Foata normal form. 4/8201 useless extension candidates. Maximal degree in co-relation 96565. Up to 7742 conditions per place. [2024-06-27 20:10:12,926 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 475 selfloop transitions, 77 changer transitions 0/590 dead transitions. [2024-06-27 20:10:12,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 590 transitions, 8216 flow [2024-06-27 20:10:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:10:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:10:12,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:10:12,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-27 20:10:12,927 INFO L175 Difference]: Start difference. First operand has 434 places, 563 transitions, 6732 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:10:12,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 590 transitions, 8216 flow Killed by 15