./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix004.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/mix004.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix004.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix004.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:11:43,908 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:11:43,959 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:11:43,968 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:11:43,968 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:11:43,999 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:11:44,000 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:11:44,001 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:11:44,001 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:11:44,004 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:11:44,004 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:11:44,004 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:11:44,005 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:11:44,006 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:11:44,006 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:11:44,007 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:11:44,007 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:11:44,007 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:11:44,007 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:11:44,007 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:11:44,008 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:11:44,008 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:11:44,008 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:11:44,008 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:11:44,009 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:11:44,009 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:11:44,009 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:11:44,009 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:11:44,010 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:11:44,010 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:11:44,011 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:11:44,011 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:11:44,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:11:44,011 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:11:44,011 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:11:44,012 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:11:44,012 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:11:44,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:11:44,012 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:11:44,012 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:11:44,012 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:11:44,013 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:11:44,013 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:11:44,013 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:11:44,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:11:44,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:11:44,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:11:44,200 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:11:44,201 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:11:44,202 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix004.oepc.yml/witness.yml [2024-06-21 16:11:44,405 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:11:44,405 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:11:44,406 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix004.oepc.i [2024-06-21 16:11:45,439 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:11:45,628 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:11:45,629 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix004.oepc.i [2024-06-21 16:11:45,648 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36f23281c/efca3a1a7d54456fa41de8f4657c3c01/FLAG831ab9667 [2024-06-21 16:11:45,659 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36f23281c/efca3a1a7d54456fa41de8f4657c3c01 [2024-06-21 16:11:45,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:11:45,660 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:11:45,661 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:11:45,661 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:11:45,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:11:45,666 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:11:44" (1/2) ... [2024-06-21 16:11:45,667 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea5822 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:11:45, skipping insertion in model container [2024-06-21 16:11:45,667 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:11:44" (1/2) ... [2024-06-21 16:11:45,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1db2b7e3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:11:45, skipping insertion in model container [2024-06-21 16:11:45,668 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:11:45" (2/2) ... [2024-06-21 16:11:45,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea5822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:11:45, skipping insertion in model container [2024-06-21 16:11:45,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:11:45" (2/2) ... [2024-06-21 16:11:45,669 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:11:45,771 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:11:45,772 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-21 16:11:45,773 INFO L97 edCorrectnessWitness]: Location invariant before [L880-L880] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-21 16:11:45,773 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-21 16:11:45,773 INFO L97 edCorrectnessWitness]: Location invariant before [L881-L881] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-21 16:11:45,774 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:11:45,774 INFO L106 edCorrectnessWitness]: ghost_update [L874-L874] multithreaded = 1; [2024-06-21 16:11:45,814 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:11:46,128 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:11:46,138 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:11:46,309 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:11:46,351 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:11:46,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:11:46 WrapperNode [2024-06-21 16:11:46,352 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:11:46,352 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:11:46,352 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:11:46,353 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:11:46,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:11:46" (1/1) ... [2024-06-21 16:11:46,385 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:11:46" (1/1) ... [2024-06-21 16:11:46,426 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 141 [2024-06-21 16:11:46,429 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:11:46,430 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:11:46,430 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:11:46,431 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:11:46,439 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:11:46" (1/1) ... [2024-06-21 16:11:46,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:11:46" (1/1) ... [2024-06-21 16:11:46,453 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:11:46" (1/1) ... [2024-06-21 16:11:46,481 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 16:11:46,482 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:11:46" (1/1) ... [2024-06-21 16:11:46,482 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:11:46" (1/1) ... [2024-06-21 16:11:46,493 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:11:46" (1/1) ... [2024-06-21 16:11:46,502 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:11:46" (1/1) ... [2024-06-21 16:11:46,504 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:11:46" (1/1) ... [2024-06-21 16:11:46,511 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:11:46" (1/1) ... [2024-06-21 16:11:46,515 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:11:46,519 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:11:46,519 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:11:46,519 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:11:46,520 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:11:46" (1/1) ... [2024-06-21 16:11:46,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:11:46,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:11:46,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 16:11:46,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 16:11:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:11:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:11:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:11:46,576 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:11:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:11:46,576 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:11:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:11:46,576 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:11:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 16:11:46,577 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 16:11:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:11:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:11:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:11:46,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:11:46,581 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:11:46,723 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:11:46,725 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:11:47,083 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:11:47,084 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:11:47,219 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:11:47,220 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:11:47,220 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:11:47 BoogieIcfgContainer [2024-06-21 16:11:47,220 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:11:47,250 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:11:47,250 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:11:47,253 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:11:47,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:11:44" (1/4) ... [2024-06-21 16:11:47,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af13e3e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:11:47, skipping insertion in model container [2024-06-21 16:11:47,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:11:45" (2/4) ... [2024-06-21 16:11:47,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af13e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:11:47, skipping insertion in model container [2024-06-21 16:11:47,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:11:46" (3/4) ... [2024-06-21 16:11:47,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af13e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:11:47, skipping insertion in model container [2024-06-21 16:11:47,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:11:47" (4/4) ... [2024-06-21 16:11:47,255 INFO L112 eAbstractionObserver]: Analyzing ICFG mix004.oepc.i [2024-06-21 16:11:47,270 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:11:47,271 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 16:11:47,271 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:11:47,313 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:11:47,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 16:11:47,361 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-21 16:11:47,362 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:11:47,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 93 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:11:47,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 16:11:47,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-21 16:11:47,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:11:47,378 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;@6c88f82d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:11:47,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 16:11:47,381 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:11:47,381 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:11:47,381 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:11:47,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:47,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:11:47,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:11:47,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:47,386 INFO L85 PathProgramCache]: Analyzing trace with hash 406078723, now seen corresponding path program 1 times [2024-06-21 16:11:47,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:47,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195254119] [2024-06-21 16:11:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:47,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:48,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:48,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195254119] [2024-06-21 16:11:48,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195254119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:48,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:48,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:11:48,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291481781] [2024-06-21 16:11:48,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:48,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:11:48,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:48,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:11:48,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:11:48,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-21 16:11:48,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:48,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:48,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-21 16:11:48,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:49,576 INFO L124 PetriNetUnfolderBase]: 7892/11157 cut-off events. [2024-06-21 16:11:49,577 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-06-21 16:11:49,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22234 conditions, 11157 events. 7892/11157 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 62667 event pairs, 6010 based on Foata normal form. 1/10882 useless extension candidates. Maximal degree in co-relation 22221. Up to 10748 conditions per place. [2024-06-21 16:11:49,641 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 42 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-21 16:11:49,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 229 flow [2024-06-21 16:11:49,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:11:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:11:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-06-21 16:11:49,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-21 16:11:49,653 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 102 transitions. [2024-06-21 16:11:49,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 229 flow [2024-06-21 16:11:49,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 16:11:49,660 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-21 16:11:49,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-21 16:11:49,665 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-21 16:11:49,665 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-21 16:11:49,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:49,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:49,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:49,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:11:49,667 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:11:49,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:49,668 INFO L85 PathProgramCache]: Analyzing trace with hash -599867518, now seen corresponding path program 1 times [2024-06-21 16:11:49,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:49,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208691021] [2024-06-21 16:11:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:49,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:50,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:50,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208691021] [2024-06-21 16:11:50,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208691021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:50,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:50,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:11:50,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237525901] [2024-06-21 16:11:50,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:50,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:11:50,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:50,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:11:50,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:11:50,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-21 16:11:50,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:50,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:50,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-21 16:11:50,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:51,630 INFO L124 PetriNetUnfolderBase]: 7882/11154 cut-off events. [2024-06-21 16:11:51,631 INFO L125 PetriNetUnfolderBase]: For 2224/2224 co-relation queries the response was YES. [2024-06-21 16:11:51,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25192 conditions, 11154 events. 7882/11154 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 62490 event pairs, 5323 based on Foata normal form. 4/11042 useless extension candidates. Maximal degree in co-relation 25180. Up to 10713 conditions per place. [2024-06-21 16:11:51,702 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 52 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-21 16:11:51,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 321 flow [2024-06-21 16:11:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:11:51,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:11:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-06-21 16:11:51,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273584905660378 [2024-06-21 16:11:51,704 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 133 transitions. [2024-06-21 16:11:51,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 321 flow [2024-06-21 16:11:51,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:11:51,723 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-21 16:11:51,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-21 16:11:51,724 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-21 16:11:51,724 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-21 16:11:51,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:51,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:51,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:51,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:11:51,725 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:11:51,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:51,725 INFO L85 PathProgramCache]: Analyzing trace with hash -947022815, now seen corresponding path program 1 times [2024-06-21 16:11:51,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:51,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323560076] [2024-06-21 16:11:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:51,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:52,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:52,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323560076] [2024-06-21 16:11:52,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323560076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:52,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:52,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:11:52,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132139669] [2024-06-21 16:11:52,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:52,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:11:52,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:52,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:11:52,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:11:52,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 16:11:52,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2024-06-21 16:11:52,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:52,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 16:11:52,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:54,237 INFO L124 PetriNetUnfolderBase]: 9557/13469 cut-off events. [2024-06-21 16:11:54,237 INFO L125 PetriNetUnfolderBase]: For 7339/7339 co-relation queries the response was YES. [2024-06-21 16:11:54,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33708 conditions, 13469 events. 9557/13469 cut-off events. For 7339/7339 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 76055 event pairs, 5407 based on Foata normal form. 4/13330 useless extension candidates. Maximal degree in co-relation 33694. Up to 12912 conditions per place. [2024-06-21 16:11:54,311 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 73 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-21 16:11:54,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 508 flow [2024-06-21 16:11:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:11:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:11:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-21 16:11:54,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-06-21 16:11:54,313 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 190 transitions. [2024-06-21 16:11:54,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 508 flow [2024-06-21 16:11:54,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 480 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 16:11:54,316 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 258 flow [2024-06-21 16:11:54,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-21 16:11:54,317 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-21 16:11:54,317 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 258 flow [2024-06-21 16:11:54,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2024-06-21 16:11:54,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:54,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:54,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:11:54,318 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:11:54,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:54,319 INFO L85 PathProgramCache]: Analyzing trace with hash -150025339, now seen corresponding path program 1 times [2024-06-21 16:11:54,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:54,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127878231] [2024-06-21 16:11:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:54,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:55,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:55,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127878231] [2024-06-21 16:11:55,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127878231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:55,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:55,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:11:55,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459672708] [2024-06-21 16:11:55,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:55,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:11:55,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:55,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:11:55,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:11:55,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 16:11:55,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:55,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:55,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 16:11:55,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:56,771 INFO L124 PetriNetUnfolderBase]: 9541/13451 cut-off events. [2024-06-21 16:11:56,771 INFO L125 PetriNetUnfolderBase]: For 14753/14753 co-relation queries the response was YES. [2024-06-21 16:11:56,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37576 conditions, 13451 events. 9541/13451 cut-off events. For 14753/14753 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 76128 event pairs, 4602 based on Foata normal form. 8/13312 useless extension candidates. Maximal degree in co-relation 37560. Up to 12846 conditions per place. [2024-06-21 16:11:56,844 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 80 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-21 16:11:56,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 598 flow [2024-06-21 16:11:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:56,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-21 16:11:56,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822102425876011 [2024-06-21 16:11:56,848 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 258 flow. Second operand 7 states and 216 transitions. [2024-06-21 16:11:56,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 598 flow [2024-06-21 16:11:56,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 109 transitions, 559 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 16:11:56,855 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 291 flow [2024-06-21 16:11:56,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=291, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-21 16:11:56,856 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-21 16:11:56,857 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 291 flow [2024-06-21 16:11:56,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:56,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:56,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:56,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:11:56,857 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:11:56,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:56,858 INFO L85 PathProgramCache]: Analyzing trace with hash -953008957, now seen corresponding path program 1 times [2024-06-21 16:11:56,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:56,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635906719] [2024-06-21 16:11:56,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:56,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:57,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:57,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635906719] [2024-06-21 16:11:57,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635906719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:57,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:57,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:11:57,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99669581] [2024-06-21 16:11:57,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:57,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:11:57,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:57,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:11:57,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:11:57,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:11:57,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:57,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:57,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:11:57,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:58,952 INFO L124 PetriNetUnfolderBase]: 9523/13523 cut-off events. [2024-06-21 16:11:58,952 INFO L125 PetriNetUnfolderBase]: For 23082/23082 co-relation queries the response was YES. [2024-06-21 16:11:58,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40354 conditions, 13523 events. 9523/13523 cut-off events. For 23082/23082 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 77246 event pairs, 4907 based on Foata normal form. 6/13426 useless extension candidates. Maximal degree in co-relation 40336. Up to 12897 conditions per place. [2024-06-21 16:11:59,020 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 65 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-21 16:11:59,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 513 flow [2024-06-21 16:11:59,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:11:59,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:11:59,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 16:11:59,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2024-06-21 16:11:59,023 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 291 flow. Second operand 5 states and 133 transitions. [2024-06-21 16:11:59,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 513 flow [2024-06-21 16:11:59,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 459 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:59,031 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 302 flow [2024-06-21 16:11:59,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-21 16:11:59,038 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-21 16:11:59,038 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 302 flow [2024-06-21 16:11:59,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:59,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:59,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:59,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:11:59,039 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:11:59,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:59,040 INFO L85 PathProgramCache]: Analyzing trace with hash 844996688, now seen corresponding path program 1 times [2024-06-21 16:11:59,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:59,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224536681] [2024-06-21 16:11:59,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:59,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:59,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:59,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224536681] [2024-06-21 16:11:59,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224536681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:59,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:59,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:11:59,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103971948] [2024-06-21 16:11:59,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:59,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:11:59,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:59,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:11:59,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:11:59,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:11:59,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 302 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:59,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:59,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:11:59,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:01,436 INFO L124 PetriNetUnfolderBase]: 9598/13608 cut-off events. [2024-06-21 16:12:01,436 INFO L125 PetriNetUnfolderBase]: For 32694/32694 co-relation queries the response was YES. [2024-06-21 16:12:01,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43921 conditions, 13608 events. 9598/13608 cut-off events. For 32694/32694 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 77595 event pairs, 4663 based on Foata normal form. 6/13512 useless extension candidates. Maximal degree in co-relation 43901. Up to 12924 conditions per place. [2024-06-21 16:12:01,518 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 80 selfloop transitions, 21 changer transitions 0/109 dead transitions. [2024-06-21 16:12:01,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 109 transitions, 713 flow [2024-06-21 16:12:01,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:12:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:12:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 16:12:01,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251572327044025 [2024-06-21 16:12:01,519 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 302 flow. Second operand 6 states and 167 transitions. [2024-06-21 16:12:01,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 109 transitions, 713 flow [2024-06-21 16:12:01,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 109 transitions, 659 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 16:12:01,527 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 424 flow [2024-06-21 16:12:01,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=424, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2024-06-21 16:12:01,528 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2024-06-21 16:12:01,528 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 424 flow [2024-06-21 16:12:01,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:01,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:01,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:01,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:12:01,529 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:01,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:01,529 INFO L85 PathProgramCache]: Analyzing trace with hash -469268924, now seen corresponding path program 2 times [2024-06-21 16:12:01,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:01,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428294046] [2024-06-21 16:12:01,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:01,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:02,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:02,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428294046] [2024-06-21 16:12:02,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428294046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:02,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:02,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:12:02,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501507124] [2024-06-21 16:12:02,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:02,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:12:02,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:02,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:12:02,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:12:02,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:12:02,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 424 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:02,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:02,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:12:02,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:03,740 INFO L124 PetriNetUnfolderBase]: 9580/13589 cut-off events. [2024-06-21 16:12:03,740 INFO L125 PetriNetUnfolderBase]: For 45281/45281 co-relation queries the response was YES. [2024-06-21 16:12:03,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47892 conditions, 13589 events. 9580/13589 cut-off events. For 45281/45281 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 77449 event pairs, 4756 based on Foata normal form. 6/13494 useless extension candidates. Maximal degree in co-relation 47870. Up to 12960 conditions per place. [2024-06-21 16:12:03,819 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 80 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-21 16:12:03,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 102 transitions, 678 flow [2024-06-21 16:12:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:12:03,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:12:03,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 16:12:03,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968553459119497 [2024-06-21 16:12:03,821 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 424 flow. Second operand 6 states and 158 transitions. [2024-06-21 16:12:03,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 102 transitions, 678 flow [2024-06-21 16:12:03,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 102 transitions, 632 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-21 16:12:03,842 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 417 flow [2024-06-21 16:12:03,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=417, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-21 16:12:03,843 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-21 16:12:03,843 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 417 flow [2024-06-21 16:12:03,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:03,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:03,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:03,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:12:03,844 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:03,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:03,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1532544948, now seen corresponding path program 1 times [2024-06-21 16:12:03,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:03,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011357237] [2024-06-21 16:12:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:03,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:04,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:04,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011357237] [2024-06-21 16:12:04,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011357237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:04,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:04,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:04,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534931831] [2024-06-21 16:12:04,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:04,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:04,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:04,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:04,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:04,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:12:04,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 417 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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) [2024-06-21 16:12:04,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:04,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:12:04,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:06,264 INFO L124 PetriNetUnfolderBase]: 9624/13605 cut-off events. [2024-06-21 16:12:06,265 INFO L125 PetriNetUnfolderBase]: For 51592/51592 co-relation queries the response was YES. [2024-06-21 16:12:06,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48575 conditions, 13605 events. 9624/13605 cut-off events. For 51592/51592 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 77257 event pairs, 4668 based on Foata normal form. 6/13507 useless extension candidates. Maximal degree in co-relation 48550. Up to 12993 conditions per place. [2024-06-21 16:12:06,346 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 93 selfloop transitions, 18 changer transitions 0/119 dead transitions. [2024-06-21 16:12:06,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 119 transitions, 777 flow [2024-06-21 16:12:06,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 16:12:06,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-21 16:12:06,348 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 417 flow. Second operand 7 states and 189 transitions. [2024-06-21 16:12:06,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 119 transitions, 777 flow [2024-06-21 16:12:06,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 119 transitions, 730 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:12:06,364 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 463 flow [2024-06-21 16:12:06,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=463, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-21 16:12:06,364 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-21 16:12:06,365 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 463 flow [2024-06-21 16:12:06,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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) [2024-06-21 16:12:06,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:06,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:06,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:12:06,365 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:06,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:06,366 INFO L85 PathProgramCache]: Analyzing trace with hash 425094336, now seen corresponding path program 2 times [2024-06-21 16:12:06,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:06,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624769558] [2024-06-21 16:12:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:06,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:07,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:07,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624769558] [2024-06-21 16:12:07,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624769558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:07,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:07,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:07,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272219011] [2024-06-21 16:12:07,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:07,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:07,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:07,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:07,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:07,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:12:07,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 463 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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) [2024-06-21 16:12:07,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:07,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:12:07,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:08,637 INFO L124 PetriNetUnfolderBase]: 9699/13714 cut-off events. [2024-06-21 16:12:08,638 INFO L125 PetriNetUnfolderBase]: For 66539/66539 co-relation queries the response was YES. [2024-06-21 16:12:08,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52421 conditions, 13714 events. 9699/13714 cut-off events. For 66539/66539 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 77718 event pairs, 4479 based on Foata normal form. 6/13611 useless extension candidates. Maximal degree in co-relation 52397. Up to 12935 conditions per place. [2024-06-21 16:12:08,715 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 86 selfloop transitions, 35 changer transitions 0/129 dead transitions. [2024-06-21 16:12:08,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 129 transitions, 951 flow [2024-06-21 16:12:08,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:08,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:08,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-21 16:12:08,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256064690026954 [2024-06-21 16:12:08,718 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 463 flow. Second operand 7 states and 195 transitions. [2024-06-21 16:12:08,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 129 transitions, 951 flow [2024-06-21 16:12:08,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 129 transitions, 890 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 16:12:08,740 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 583 flow [2024-06-21 16:12:08,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=583, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2024-06-21 16:12:08,741 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-21 16:12:08,741 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 583 flow [2024-06-21 16:12:08,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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) [2024-06-21 16:12:08,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:08,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:08,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:12:08,742 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:08,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:08,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1650815482, now seen corresponding path program 3 times [2024-06-21 16:12:08,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:08,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463505586] [2024-06-21 16:12:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:08,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:09,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:09,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463505586] [2024-06-21 16:12:09,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463505586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:09,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:09,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:09,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035709800] [2024-06-21 16:12:09,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:09,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:09,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:09,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:09,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:09,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:12:09,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 583 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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) [2024-06-21 16:12:09,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:09,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:12:09,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:11,116 INFO L124 PetriNetUnfolderBase]: 9681/13695 cut-off events. [2024-06-21 16:12:11,116 INFO L125 PetriNetUnfolderBase]: For 84599/84599 co-relation queries the response was YES. [2024-06-21 16:12:11,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55616 conditions, 13695 events. 9681/13695 cut-off events. For 84599/84599 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 77815 event pairs, 4675 based on Foata normal form. 6/13593 useless extension candidates. Maximal degree in co-relation 55591. Up to 13060 conditions per place. [2024-06-21 16:12:11,197 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 96 selfloop transitions, 18 changer transitions 0/122 dead transitions. [2024-06-21 16:12:11,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 122 transitions, 899 flow [2024-06-21 16:12:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 16:12:11,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-21 16:12:11,198 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 583 flow. Second operand 7 states and 184 transitions. [2024-06-21 16:12:11,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 122 transitions, 899 flow [2024-06-21 16:12:11,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 122 transitions, 815 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 16:12:11,232 INFO L231 Difference]: Finished difference. Result has 82 places, 89 transitions, 546 flow [2024-06-21 16:12:11,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=546, PETRI_PLACES=82, PETRI_TRANSITIONS=89} [2024-06-21 16:12:11,233 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-06-21 16:12:11,233 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 89 transitions, 546 flow [2024-06-21 16:12:11,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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) [2024-06-21 16:12:11,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:11,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:11,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:12:11,234 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:11,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:11,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1355047194, now seen corresponding path program 1 times [2024-06-21 16:12:11,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:11,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129152282] [2024-06-21 16:12:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:12,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:12,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129152282] [2024-06-21 16:12:12,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129152282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:12,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:12,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:12:12,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905815510] [2024-06-21 16:12:12,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:12,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:12:12,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:12,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:12:12,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:12:12,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:12:12,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 89 transitions, 546 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:12,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:12,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:12:12,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:14,482 INFO L124 PetriNetUnfolderBase]: 11757/16582 cut-off events. [2024-06-21 16:12:14,482 INFO L125 PetriNetUnfolderBase]: For 110164/110164 co-relation queries the response was YES. [2024-06-21 16:12:14,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66816 conditions, 16582 events. 11757/16582 cut-off events. For 110164/110164 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 94524 event pairs, 5699 based on Foata normal form. 6/16423 useless extension candidates. Maximal degree in co-relation 66789. Up to 15837 conditions per place. [2024-06-21 16:12:14,593 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 101 selfloop transitions, 20 changer transitions 0/128 dead transitions. [2024-06-21 16:12:14,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 945 flow [2024-06-21 16:12:14,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:14,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 16:12:14,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-21 16:12:14,594 INFO L175 Difference]: Start difference. First operand has 82 places, 89 transitions, 546 flow. Second operand 7 states and 177 transitions. [2024-06-21 16:12:14,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 945 flow [2024-06-21 16:12:14,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 128 transitions, 879 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:12:14,643 INFO L231 Difference]: Finished difference. Result has 84 places, 96 transitions, 618 flow [2024-06-21 16:12:14,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=618, PETRI_PLACES=84, PETRI_TRANSITIONS=96} [2024-06-21 16:12:14,644 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 28 predicate places. [2024-06-21 16:12:14,644 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 96 transitions, 618 flow [2024-06-21 16:12:14,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:14,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:14,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:14,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:12:14,644 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:14,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:14,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1764938598, now seen corresponding path program 1 times [2024-06-21 16:12:14,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:14,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056776200] [2024-06-21 16:12:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:14,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:15,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:15,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056776200] [2024-06-21 16:12:15,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056776200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:15,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:15,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:12:15,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530979407] [2024-06-21 16:12:15,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:15,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:12:15,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:15,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:12:15,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:12:15,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:12:15,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 96 transitions, 618 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:15,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:15,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:12:15,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:17,212 INFO L124 PetriNetUnfolderBase]: 13420/18899 cut-off events. [2024-06-21 16:12:17,212 INFO L125 PetriNetUnfolderBase]: For 148158/148167 co-relation queries the response was YES. [2024-06-21 16:12:17,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80360 conditions, 18899 events. 13420/18899 cut-off events. For 148158/148167 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 107739 event pairs, 7113 based on Foata normal form. 11/18886 useless extension candidates. Maximal degree in co-relation 80331. Up to 18186 conditions per place. [2024-06-21 16:12:17,313 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 94 selfloop transitions, 10 changer transitions 0/114 dead transitions. [2024-06-21 16:12:17,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 114 transitions, 902 flow [2024-06-21 16:12:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:12:17,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:12:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-21 16:12:17,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679245283018868 [2024-06-21 16:12:17,315 INFO L175 Difference]: Start difference. First operand has 84 places, 96 transitions, 618 flow. Second operand 5 states and 124 transitions. [2024-06-21 16:12:17,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 114 transitions, 902 flow [2024-06-21 16:12:17,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 114 transitions, 832 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 16:12:17,364 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 625 flow [2024-06-21 16:12:17,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=625, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-21 16:12:17,365 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-21 16:12:17,365 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 625 flow [2024-06-21 16:12:17,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:17,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:17,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:17,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:12:17,366 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:17,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:17,366 INFO L85 PathProgramCache]: Analyzing trace with hash 289214063, now seen corresponding path program 1 times [2024-06-21 16:12:17,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:17,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996452870] [2024-06-21 16:12:17,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:17,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:18,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:18,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996452870] [2024-06-21 16:12:18,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996452870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:18,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:18,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:12:18,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968664997] [2024-06-21 16:12:18,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:18,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:12:18,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:18,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:12:18,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:12:18,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:12:18,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 625 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:18,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:18,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:12:18,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:20,794 INFO L124 PetriNetUnfolderBase]: 13250/18689 cut-off events. [2024-06-21 16:12:20,794 INFO L125 PetriNetUnfolderBase]: For 176294/176302 co-relation queries the response was YES. [2024-06-21 16:12:20,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84244 conditions, 18689 events. 13250/18689 cut-off events. For 176294/176302 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 108880 event pairs, 6010 based on Foata normal form. 6/18587 useless extension candidates. Maximal degree in co-relation 84214. Up to 17596 conditions per place. [2024-06-21 16:12:20,952 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 128 selfloop transitions, 30 changer transitions 0/168 dead transitions. [2024-06-21 16:12:20,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 168 transitions, 1281 flow [2024-06-21 16:12:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:12:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:12:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-21 16:12:20,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519916142557652 [2024-06-21 16:12:20,954 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 625 flow. Second operand 9 states and 248 transitions. [2024-06-21 16:12:20,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 168 transitions, 1281 flow [2024-06-21 16:12:21,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 168 transitions, 1234 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 16:12:21,019 INFO L231 Difference]: Finished difference. Result has 91 places, 108 transitions, 769 flow [2024-06-21 16:12:21,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=769, PETRI_PLACES=91, PETRI_TRANSITIONS=108} [2024-06-21 16:12:21,020 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-21 16:12:21,020 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 108 transitions, 769 flow [2024-06-21 16:12:21,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:21,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:21,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:21,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:12:21,021 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:21,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:21,021 INFO L85 PathProgramCache]: Analyzing trace with hash 736130637, now seen corresponding path program 2 times [2024-06-21 16:12:21,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:21,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597556657] [2024-06-21 16:12:21,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:21,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:22,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:22,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597556657] [2024-06-21 16:12:22,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597556657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:22,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:22,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:12:22,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935212620] [2024-06-21 16:12:22,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:22,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:12:22,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:22,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:12:22,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:12:22,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:12:22,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 108 transitions, 769 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:22,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:22,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:12:22,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:24,720 INFO L124 PetriNetUnfolderBase]: 13236/18679 cut-off events. [2024-06-21 16:12:24,721 INFO L125 PetriNetUnfolderBase]: For 207817/207857 co-relation queries the response was YES. [2024-06-21 16:12:24,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88563 conditions, 18679 events. 13236/18679 cut-off events. For 207817/207857 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 109051 event pairs, 6019 based on Foata normal form. 6/18574 useless extension candidates. Maximal degree in co-relation 88532. Up to 17636 conditions per place. [2024-06-21 16:12:24,841 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 122 selfloop transitions, 22 changer transitions 0/154 dead transitions. [2024-06-21 16:12:24,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 154 transitions, 1179 flow [2024-06-21 16:12:24,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:12:24,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:12:24,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 16:12:24,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-21 16:12:24,843 INFO L175 Difference]: Start difference. First operand has 91 places, 108 transitions, 769 flow. Second operand 8 states and 215 transitions. [2024-06-21 16:12:24,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 154 transitions, 1179 flow [2024-06-21 16:12:24,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 154 transitions, 1067 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-21 16:12:24,930 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 712 flow [2024-06-21 16:12:24,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=712, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-21 16:12:24,931 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-21 16:12:24,931 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 712 flow [2024-06-21 16:12:24,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:24,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:24,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:24,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:12:24,931 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:24,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:24,932 INFO L85 PathProgramCache]: Analyzing trace with hash -260533247, now seen corresponding path program 3 times [2024-06-21 16:12:24,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:24,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871736795] [2024-06-21 16:12:24,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:24,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:25,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:25,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871736795] [2024-06-21 16:12:25,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871736795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:25,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:25,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:12:25,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106874115] [2024-06-21 16:12:25,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:25,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:12:25,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:12:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:12:26,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:12:26,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 712 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:26,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:26,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:12:26,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:28,268 INFO L124 PetriNetUnfolderBase]: 13263/18790 cut-off events. [2024-06-21 16:12:28,268 INFO L125 PetriNetUnfolderBase]: For 225455/225471 co-relation queries the response was YES. [2024-06-21 16:12:28,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90145 conditions, 18790 events. 13263/18790 cut-off events. For 225455/225471 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 110153 event pairs, 5627 based on Foata normal form. 10/18757 useless extension candidates. Maximal degree in co-relation 90112. Up to 17448 conditions per place. [2024-06-21 16:12:28,406 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 106 selfloop transitions, 49 changer transitions 0/165 dead transitions. [2024-06-21 16:12:28,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 165 transitions, 1366 flow [2024-06-21 16:12:28,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:12:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:12:28,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-21 16:12:28,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2024-06-21 16:12:28,415 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 712 flow. Second operand 8 states and 222 transitions. [2024-06-21 16:12:28,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 165 transitions, 1366 flow [2024-06-21 16:12:28,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 165 transitions, 1311 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 16:12:28,493 INFO L231 Difference]: Finished difference. Result has 96 places, 116 transitions, 928 flow [2024-06-21 16:12:28,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=928, PETRI_PLACES=96, PETRI_TRANSITIONS=116} [2024-06-21 16:12:28,494 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-06-21 16:12:28,494 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 116 transitions, 928 flow [2024-06-21 16:12:28,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:28,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:28,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:28,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:12:28,495 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:28,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:28,495 INFO L85 PathProgramCache]: Analyzing trace with hash 149391151, now seen corresponding path program 1 times [2024-06-21 16:12:28,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:28,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680267455] [2024-06-21 16:12:28,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:28,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:29,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:29,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680267455] [2024-06-21 16:12:29,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680267455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:29,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:29,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:12:29,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878316055] [2024-06-21 16:12:29,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:29,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:12:29,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:29,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:12:29,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:12:29,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:12:29,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 116 transitions, 928 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:29,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:29,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:12:29,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:31,836 INFO L124 PetriNetUnfolderBase]: 13608/19198 cut-off events. [2024-06-21 16:12:31,836 INFO L125 PetriNetUnfolderBase]: For 265766/265766 co-relation queries the response was YES. [2024-06-21 16:12:31,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97246 conditions, 19198 events. 13608/19198 cut-off events. For 265766/265766 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 109753 event pairs, 6372 based on Foata normal form. 3/19185 useless extension candidates. Maximal degree in co-relation 97211. Up to 18148 conditions per place. [2024-06-21 16:12:32,002 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 123 selfloop transitions, 25 changer transitions 0/156 dead transitions. [2024-06-21 16:12:32,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 156 transitions, 1413 flow [2024-06-21 16:12:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 16:12:32,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-21 16:12:32,004 INFO L175 Difference]: Start difference. First operand has 96 places, 116 transitions, 928 flow. Second operand 7 states and 178 transitions. [2024-06-21 16:12:32,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 156 transitions, 1413 flow [2024-06-21 16:12:32,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 156 transitions, 1326 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 16:12:32,156 INFO L231 Difference]: Finished difference. Result has 99 places, 124 transitions, 1028 flow [2024-06-21 16:12:32,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1028, PETRI_PLACES=99, PETRI_TRANSITIONS=124} [2024-06-21 16:12:32,157 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2024-06-21 16:12:32,157 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 124 transitions, 1028 flow [2024-06-21 16:12:32,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:32,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:32,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:32,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:12:32,158 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:32,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:32,158 INFO L85 PathProgramCache]: Analyzing trace with hash 935576577, now seen corresponding path program 4 times [2024-06-21 16:12:32,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:32,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536161536] [2024-06-21 16:12:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:32,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:33,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:33,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536161536] [2024-06-21 16:12:33,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536161536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:33,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:33,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:12:33,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678011018] [2024-06-21 16:12:33,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:33,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:12:33,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:33,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:12:33,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:12:33,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:12:33,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 124 transitions, 1028 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:33,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:33,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:12:33,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:35,481 INFO L124 PetriNetUnfolderBase]: 13285/18749 cut-off events. [2024-06-21 16:12:35,481 INFO L125 PetriNetUnfolderBase]: For 284592/284592 co-relation queries the response was YES. [2024-06-21 16:12:35,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97614 conditions, 18749 events. 13285/18749 cut-off events. For 284592/284592 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 109112 event pairs, 5801 based on Foata normal form. 9/18658 useless extension candidates. Maximal degree in co-relation 97577. Up to 17560 conditions per place. [2024-06-21 16:12:35,644 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 122 selfloop transitions, 40 changer transitions 0/172 dead transitions. [2024-06-21 16:12:35,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 172 transitions, 1634 flow [2024-06-21 16:12:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:12:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:12:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 16:12:35,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-21 16:12:35,645 INFO L175 Difference]: Start difference. First operand has 99 places, 124 transitions, 1028 flow. Second operand 8 states and 214 transitions. [2024-06-21 16:12:35,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 172 transitions, 1634 flow [2024-06-21 16:12:35,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 172 transitions, 1554 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 16:12:35,829 INFO L231 Difference]: Finished difference. Result has 102 places, 128 transitions, 1120 flow [2024-06-21 16:12:35,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1120, PETRI_PLACES=102, PETRI_TRANSITIONS=128} [2024-06-21 16:12:35,829 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-21 16:12:35,829 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 128 transitions, 1120 flow [2024-06-21 16:12:35,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:35,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:35,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:35,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:12:35,830 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:35,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:35,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1148291696, now seen corresponding path program 1 times [2024-06-21 16:12:35,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:35,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718774903] [2024-06-21 16:12:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:35,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:36,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:36,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718774903] [2024-06-21 16:12:36,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718774903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:36,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:36,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:12:36,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993506380] [2024-06-21 16:12:36,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:36,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:12:36,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:36,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:12:36,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:12:36,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:12:36,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 128 transitions, 1120 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:36,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:36,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:12:36,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:38,910 INFO L124 PetriNetUnfolderBase]: 13695/19279 cut-off events. [2024-06-21 16:12:38,910 INFO L125 PetriNetUnfolderBase]: For 338574/338609 co-relation queries the response was YES. [2024-06-21 16:12:38,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103515 conditions, 19279 events. 13695/19279 cut-off events. For 338574/338609 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 110191 event pairs, 6862 based on Foata normal form. 13/19261 useless extension candidates. Maximal degree in co-relation 103477. Up to 18469 conditions per place. [2024-06-21 16:12:39,029 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 125 selfloop transitions, 14 changer transitions 0/151 dead transitions. [2024-06-21 16:12:39,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 151 transitions, 1498 flow [2024-06-21 16:12:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:12:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:12:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 16:12:39,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2024-06-21 16:12:39,031 INFO L175 Difference]: Start difference. First operand has 102 places, 128 transitions, 1120 flow. Second operand 6 states and 146 transitions. [2024-06-21 16:12:39,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 151 transitions, 1498 flow [2024-06-21 16:12:39,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 151 transitions, 1331 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 16:12:39,148 INFO L231 Difference]: Finished difference. Result has 102 places, 132 transitions, 1050 flow [2024-06-21 16:12:39,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1050, PETRI_PLACES=102, PETRI_TRANSITIONS=132} [2024-06-21 16:12:39,148 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-21 16:12:39,149 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 132 transitions, 1050 flow [2024-06-21 16:12:39,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:39,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:39,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:39,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:12:39,149 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:39,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:39,150 INFO L85 PathProgramCache]: Analyzing trace with hash 375641757, now seen corresponding path program 1 times [2024-06-21 16:12:39,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:39,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583270617] [2024-06-21 16:12:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:39,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:40,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:40,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583270617] [2024-06-21 16:12:40,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583270617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:40,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:40,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:12:40,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023844765] [2024-06-21 16:12:40,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:40,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:12:40,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:40,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:12:40,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:12:40,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:12:40,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 132 transitions, 1050 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:40,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:40,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:12:40,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:43,413 INFO L124 PetriNetUnfolderBase]: 13750/19350 cut-off events. [2024-06-21 16:12:43,413 INFO L125 PetriNetUnfolderBase]: For 390408/390408 co-relation queries the response was YES. [2024-06-21 16:12:43,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111121 conditions, 19350 events. 13750/19350 cut-off events. For 390408/390408 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 113141 event pairs, 5056 based on Foata normal form. 24/19188 useless extension candidates. Maximal degree in co-relation 111082. Up to 17816 conditions per place. [2024-06-21 16:12:43,581 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 166 selfloop transitions, 36 changer transitions 0/212 dead transitions. [2024-06-21 16:12:43,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 212 transitions, 1910 flow [2024-06-21 16:12:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:43,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 279 transitions. [2024-06-21 16:12:43,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264150943396226 [2024-06-21 16:12:43,583 INFO L175 Difference]: Start difference. First operand has 102 places, 132 transitions, 1050 flow. Second operand 10 states and 279 transitions. [2024-06-21 16:12:43,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 212 transitions, 1910 flow [2024-06-21 16:12:43,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 212 transitions, 1843 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 16:12:43,745 INFO L231 Difference]: Finished difference. Result has 108 places, 136 transitions, 1180 flow [2024-06-21 16:12:43,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1180, PETRI_PLACES=108, PETRI_TRANSITIONS=136} [2024-06-21 16:12:43,746 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-21 16:12:43,746 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 136 transitions, 1180 flow [2024-06-21 16:12:43,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:43,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:43,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:43,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:12:43,747 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:43,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:43,747 INFO L85 PathProgramCache]: Analyzing trace with hash 375702207, now seen corresponding path program 2 times [2024-06-21 16:12:43,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:43,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403366702] [2024-06-21 16:12:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:43,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:45,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:45,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403366702] [2024-06-21 16:12:45,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403366702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:45,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:45,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:12:45,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569138205] [2024-06-21 16:12:45,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:45,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:12:45,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:45,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:12:45,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:12:45,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:12:45,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 136 transitions, 1180 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:45,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:45,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:12:45,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:48,703 INFO L124 PetriNetUnfolderBase]: 13628/19264 cut-off events. [2024-06-21 16:12:48,703 INFO L125 PetriNetUnfolderBase]: For 426731/426731 co-relation queries the response was YES. [2024-06-21 16:12:48,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112611 conditions, 19264 events. 13628/19264 cut-off events. For 426731/426731 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 113204 event pairs, 5686 based on Foata normal form. 36/19168 useless extension candidates. Maximal degree in co-relation 112571. Up to 17916 conditions per place. [2024-06-21 16:12:48,833 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 163 selfloop transitions, 32 changer transitions 0/205 dead transitions. [2024-06-21 16:12:48,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 205 transitions, 1780 flow [2024-06-21 16:12:48,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 272 transitions. [2024-06-21 16:12:48,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132075471698113 [2024-06-21 16:12:48,834 INFO L175 Difference]: Start difference. First operand has 108 places, 136 transitions, 1180 flow. Second operand 10 states and 272 transitions. [2024-06-21 16:12:48,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 205 transitions, 1780 flow [2024-06-21 16:12:49,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 205 transitions, 1709 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 16:12:49,008 INFO L231 Difference]: Finished difference. Result has 112 places, 136 transitions, 1186 flow [2024-06-21 16:12:49,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1186, PETRI_PLACES=112, PETRI_TRANSITIONS=136} [2024-06-21 16:12:49,009 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-06-21 16:12:49,009 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 136 transitions, 1186 flow [2024-06-21 16:12:49,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:49,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:49,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:49,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:12:49,009 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:49,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:49,009 INFO L85 PathProgramCache]: Analyzing trace with hash 493789887, now seen corresponding path program 3 times [2024-06-21 16:12:49,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:49,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250100063] [2024-06-21 16:12:49,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:49,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:50,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:50,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250100063] [2024-06-21 16:12:50,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250100063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:50,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:50,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:12:50,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452098434] [2024-06-21 16:12:50,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:50,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:12:50,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:50,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:12:50,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:12:50,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:12:50,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 136 transitions, 1186 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:50,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:50,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:12:50,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:53,000 INFO L124 PetriNetUnfolderBase]: 13761/19538 cut-off events. [2024-06-21 16:12:53,000 INFO L125 PetriNetUnfolderBase]: For 457897/457901 co-relation queries the response was YES. [2024-06-21 16:12:53,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115470 conditions, 19538 events. 13761/19538 cut-off events. For 457897/457901 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 115663 event pairs, 5258 based on Foata normal form. 34/19494 useless extension candidates. Maximal degree in co-relation 115428. Up to 17972 conditions per place. [2024-06-21 16:12:53,176 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 131 selfloop transitions, 57 changer transitions 0/198 dead transitions. [2024-06-21 16:12:53,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 198 transitions, 1918 flow [2024-06-21 16:12:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:12:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:12:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-06-21 16:12:53,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241090146750524 [2024-06-21 16:12:53,179 INFO L175 Difference]: Start difference. First operand has 112 places, 136 transitions, 1186 flow. Second operand 9 states and 250 transitions. [2024-06-21 16:12:53,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 198 transitions, 1918 flow [2024-06-21 16:12:53,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 198 transitions, 1846 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:12:53,358 INFO L231 Difference]: Finished difference. Result has 112 places, 138 transitions, 1302 flow [2024-06-21 16:12:53,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1302, PETRI_PLACES=112, PETRI_TRANSITIONS=138} [2024-06-21 16:12:53,359 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-06-21 16:12:53,359 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 138 transitions, 1302 flow [2024-06-21 16:12:53,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:53,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:53,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:53,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:12:53,359 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:53,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:53,359 INFO L85 PathProgramCache]: Analyzing trace with hash 848397649, now seen corresponding path program 1 times [2024-06-21 16:12:53,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:53,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034799971] [2024-06-21 16:12:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:53,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:54,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:54,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034799971] [2024-06-21 16:12:54,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034799971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:54,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:54,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:12:54,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862823778] [2024-06-21 16:12:54,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:54,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:12:54,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:54,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:12:54,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:12:54,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:12:54,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 138 transitions, 1302 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:54,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:54,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:12:54,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:57,577 INFO L124 PetriNetUnfolderBase]: 14218/20040 cut-off events. [2024-06-21 16:12:57,577 INFO L125 PetriNetUnfolderBase]: For 504213/504217 co-relation queries the response was YES. [2024-06-21 16:12:57,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121281 conditions, 20040 events. 14218/20040 cut-off events. For 504213/504217 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 115599 event pairs, 5859 based on Foata normal form. 8/19941 useless extension candidates. Maximal degree in co-relation 121238. Up to 18930 conditions per place. [2024-06-21 16:12:57,773 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 147 selfloop transitions, 35 changer transitions 0/190 dead transitions. [2024-06-21 16:12:57,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 190 transitions, 1887 flow [2024-06-21 16:12:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:12:57,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:12:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 16:12:57,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49292452830188677 [2024-06-21 16:12:57,775 INFO L175 Difference]: Start difference. First operand has 112 places, 138 transitions, 1302 flow. Second operand 8 states and 209 transitions. [2024-06-21 16:12:57,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 190 transitions, 1887 flow [2024-06-21 16:12:58,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 190 transitions, 1747 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 16:12:58,071 INFO L231 Difference]: Finished difference. Result has 114 places, 145 transitions, 1356 flow [2024-06-21 16:12:58,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1356, PETRI_PLACES=114, PETRI_TRANSITIONS=145} [2024-06-21 16:12:58,072 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-06-21 16:12:58,072 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 145 transitions, 1356 flow [2024-06-21 16:12:58,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:58,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:58,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:58,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:12:58,072 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:12:58,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:58,073 INFO L85 PathProgramCache]: Analyzing trace with hash 394695097, now seen corresponding path program 1 times [2024-06-21 16:12:58,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:58,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996412320] [2024-06-21 16:12:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:58,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:59,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:59,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996412320] [2024-06-21 16:12:59,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996412320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:59,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:59,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:12:59,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394508097] [2024-06-21 16:12:59,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:59,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:12:59,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:59,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:12:59,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:12:59,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:12:59,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 145 transitions, 1356 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:59,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:59,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:12:59,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:01,392 INFO L124 PetriNetUnfolderBase]: 14382/20295 cut-off events. [2024-06-21 16:13:01,392 INFO L125 PetriNetUnfolderBase]: For 534257/534298 co-relation queries the response was YES. [2024-06-21 16:13:01,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123803 conditions, 20295 events. 14382/20295 cut-off events. For 534257/534298 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 116931 event pairs, 6568 based on Foata normal form. 11/20260 useless extension candidates. Maximal degree in co-relation 123758. Up to 19390 conditions per place. [2024-06-21 16:13:01,584 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 141 selfloop transitions, 24 changer transitions 0/179 dead transitions. [2024-06-21 16:13:01,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 179 transitions, 1968 flow [2024-06-21 16:13:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:13:01,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:13:01,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 16:13:01,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48742138364779874 [2024-06-21 16:13:01,585 INFO L175 Difference]: Start difference. First operand has 114 places, 145 transitions, 1356 flow. Second operand 6 states and 155 transitions. [2024-06-21 16:13:01,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 179 transitions, 1968 flow [2024-06-21 16:13:02,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 179 transitions, 1838 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 16:13:02,097 INFO L231 Difference]: Finished difference. Result has 115 places, 153 transitions, 1420 flow [2024-06-21 16:13:02,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1420, PETRI_PLACES=115, PETRI_TRANSITIONS=153} [2024-06-21 16:13:02,097 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 59 predicate places. [2024-06-21 16:13:02,097 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 153 transitions, 1420 flow [2024-06-21 16:13:02,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:02,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:02,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:02,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:13:02,098 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:13:02,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:02,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1061711641, now seen corresponding path program 2 times [2024-06-21 16:13:02,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:02,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407456477] [2024-06-21 16:13:02,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:02,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:03,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:03,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407456477] [2024-06-21 16:13:03,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407456477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:03,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:03,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:13:03,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041555896] [2024-06-21 16:13:03,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:03,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:13:03,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:03,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:13:03,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:13:03,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:13:03,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 153 transitions, 1420 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:03,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:03,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:13:03,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:05,975 INFO L124 PetriNetUnfolderBase]: 14322/20266 cut-off events. [2024-06-21 16:13:05,975 INFO L125 PetriNetUnfolderBase]: For 588069/588069 co-relation queries the response was YES. [2024-06-21 16:13:06,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129560 conditions, 20266 events. 14322/20266 cut-off events. For 588069/588069 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 117575 event pairs, 5949 based on Foata normal form. 6/20164 useless extension candidates. Maximal degree in co-relation 129514. Up to 19114 conditions per place. [2024-06-21 16:13:06,191 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 163 selfloop transitions, 28 changer transitions 0/201 dead transitions. [2024-06-21 16:13:06,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 201 transitions, 2024 flow [2024-06-21 16:13:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:13:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:13:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 16:13:06,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-21 16:13:06,192 INFO L175 Difference]: Start difference. First operand has 115 places, 153 transitions, 1420 flow. Second operand 8 states and 204 transitions. [2024-06-21 16:13:06,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 201 transitions, 2024 flow [2024-06-21 16:13:06,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 201 transitions, 1962 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-21 16:13:06,580 INFO L231 Difference]: Finished difference. Result has 122 places, 160 transitions, 1556 flow [2024-06-21 16:13:06,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1556, PETRI_PLACES=122, PETRI_TRANSITIONS=160} [2024-06-21 16:13:06,580 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-21 16:13:06,581 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 160 transitions, 1556 flow [2024-06-21 16:13:06,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:06,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:06,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:06,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:13:06,581 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:13:06,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:06,581 INFO L85 PathProgramCache]: Analyzing trace with hash -825536281, now seen corresponding path program 3 times [2024-06-21 16:13:06,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:06,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91315574] [2024-06-21 16:13:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:06,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:07,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:07,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91315574] [2024-06-21 16:13:07,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91315574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:07,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:07,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:13:07,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684388875] [2024-06-21 16:13:07,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:07,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:13:07,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:13:07,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:13:08,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:13:08,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 160 transitions, 1556 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:08,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:08,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:13:08,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:11,090 INFO L124 PetriNetUnfolderBase]: 14358/20318 cut-off events. [2024-06-21 16:13:11,090 INFO L125 PetriNetUnfolderBase]: For 644279/644279 co-relation queries the response was YES. [2024-06-21 16:13:11,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134449 conditions, 20318 events. 14358/20318 cut-off events. For 644279/644279 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 117741 event pairs, 5984 based on Foata normal form. 6/20216 useless extension candidates. Maximal degree in co-relation 134400. Up to 19173 conditions per place. [2024-06-21 16:13:11,287 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 165 selfloop transitions, 28 changer transitions 0/203 dead transitions. [2024-06-21 16:13:11,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 203 transitions, 2130 flow [2024-06-21 16:13:11,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:13:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:13:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 16:13:11,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47641509433962265 [2024-06-21 16:13:11,288 INFO L175 Difference]: Start difference. First operand has 122 places, 160 transitions, 1556 flow. Second operand 8 states and 202 transitions. [2024-06-21 16:13:11,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 203 transitions, 2130 flow [2024-06-21 16:13:11,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 203 transitions, 1996 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 16:13:11,655 INFO L231 Difference]: Finished difference. Result has 125 places, 163 transitions, 1579 flow [2024-06-21 16:13:11,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1579, PETRI_PLACES=125, PETRI_TRANSITIONS=163} [2024-06-21 16:13:11,655 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-21 16:13:11,655 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 163 transitions, 1579 flow [2024-06-21 16:13:11,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:11,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:11,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:11,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:13:11,656 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:13:11,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash -825536529, now seen corresponding path program 1 times [2024-06-21 16:13:11,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:11,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953117954] [2024-06-21 16:13:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:11,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:13,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:13,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953117954] [2024-06-21 16:13:13,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953117954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:13,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:13,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:13:13,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022347765] [2024-06-21 16:13:13,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:13,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:13:13,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:13,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:13:13,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:13:13,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:13:13,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 163 transitions, 1579 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:13,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:13,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:13:13,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:16,084 INFO L124 PetriNetUnfolderBase]: 14387/20357 cut-off events. [2024-06-21 16:13:16,084 INFO L125 PetriNetUnfolderBase]: For 695063/695063 co-relation queries the response was YES. [2024-06-21 16:13:16,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137774 conditions, 20357 events. 14387/20357 cut-off events. For 695063/695063 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 117837 event pairs, 6014 based on Foata normal form. 3/20252 useless extension candidates. Maximal degree in co-relation 137724. Up to 19197 conditions per place. [2024-06-21 16:13:16,284 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 164 selfloop transitions, 33 changer transitions 0/207 dead transitions. [2024-06-21 16:13:16,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 207 transitions, 2113 flow [2024-06-21 16:13:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:13:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:13:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 16:13:16,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-21 16:13:16,286 INFO L175 Difference]: Start difference. First operand has 125 places, 163 transitions, 1579 flow. Second operand 8 states and 203 transitions. [2024-06-21 16:13:16,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 207 transitions, 2113 flow [2024-06-21 16:13:16,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 207 transitions, 1940 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-21 16:13:16,672 INFO L231 Difference]: Finished difference. Result has 127 places, 167 transitions, 1530 flow [2024-06-21 16:13:16,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1530, PETRI_PLACES=127, PETRI_TRANSITIONS=167} [2024-06-21 16:13:16,673 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-21 16:13:16,673 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 167 transitions, 1530 flow [2024-06-21 16:13:16,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:16,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:16,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:16,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:13:16,674 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:13:16,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:16,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1061896339, now seen corresponding path program 4 times [2024-06-21 16:13:16,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:16,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131990341] [2024-06-21 16:13:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:16,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:17,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:17,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131990341] [2024-06-21 16:13:17,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131990341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:17,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:17,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:13:17,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836478015] [2024-06-21 16:13:17,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:17,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:13:17,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:17,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:13:17,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:13:18,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:13:18,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 167 transitions, 1530 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:18,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:18,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:13:18,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:21,117 INFO L124 PetriNetUnfolderBase]: 13981/19957 cut-off events. [2024-06-21 16:13:21,117 INFO L125 PetriNetUnfolderBase]: For 732742/732742 co-relation queries the response was YES. [2024-06-21 16:13:21,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135739 conditions, 19957 events. 13981/19957 cut-off events. For 732742/732742 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 118899 event pairs, 5467 based on Foata normal form. 36/19877 useless extension candidates. Maximal degree in co-relation 135688. Up to 18323 conditions per place. [2024-06-21 16:13:21,281 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 159 selfloop transitions, 49 changer transitions 0/222 dead transitions. [2024-06-21 16:13:21,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 222 transitions, 2186 flow [2024-06-21 16:13:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:13:21,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:13:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-06-21 16:13:21,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5010482180293501 [2024-06-21 16:13:21,282 INFO L175 Difference]: Start difference. First operand has 127 places, 167 transitions, 1530 flow. Second operand 9 states and 239 transitions. [2024-06-21 16:13:21,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 222 transitions, 2186 flow [2024-06-21 16:13:21,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 222 transitions, 2114 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:13:21,529 INFO L231 Difference]: Finished difference. Result has 129 places, 169 transitions, 1648 flow [2024-06-21 16:13:21,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1458, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1648, PETRI_PLACES=129, PETRI_TRANSITIONS=169} [2024-06-21 16:13:21,529 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-21 16:13:21,529 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 169 transitions, 1648 flow [2024-06-21 16:13:21,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:21,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:21,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:21,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:13:21,530 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:13:21,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:21,530 INFO L85 PathProgramCache]: Analyzing trace with hash -262933919, now seen corresponding path program 4 times [2024-06-21 16:13:21,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:21,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245007772] [2024-06-21 16:13:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:21,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:22,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:22,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245007772] [2024-06-21 16:13:22,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245007772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:22,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:22,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:13:22,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297066151] [2024-06-21 16:13:22,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:22,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:13:22,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:22,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:13:22,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:13:23,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:13:23,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 169 transitions, 1648 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:23,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:23,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:13:23,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:25,873 INFO L124 PetriNetUnfolderBase]: 14419/20413 cut-off events. [2024-06-21 16:13:25,874 INFO L125 PetriNetUnfolderBase]: For 782690/782690 co-relation queries the response was YES. [2024-06-21 16:13:26,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141869 conditions, 20413 events. 14419/20413 cut-off events. For 782690/782690 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 118407 event pairs, 5838 based on Foata normal form. 6/20311 useless extension candidates. Maximal degree in co-relation 141817. Up to 19283 conditions per place. [2024-06-21 16:13:26,128 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 179 selfloop transitions, 23 changer transitions 0/212 dead transitions. [2024-06-21 16:13:26,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 212 transitions, 2248 flow [2024-06-21 16:13:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:13:26,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:13:26,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 16:13:26,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740566037735849 [2024-06-21 16:13:26,130 INFO L175 Difference]: Start difference. First operand has 129 places, 169 transitions, 1648 flow. Second operand 8 states and 201 transitions. [2024-06-21 16:13:26,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 212 transitions, 2248 flow [2024-06-21 16:13:26,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 212 transitions, 2112 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 16:13:26,623 INFO L231 Difference]: Finished difference. Result has 130 places, 172 transitions, 1668 flow [2024-06-21 16:13:26,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1668, PETRI_PLACES=130, PETRI_TRANSITIONS=172} [2024-06-21 16:13:26,624 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-21 16:13:26,624 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 172 transitions, 1668 flow [2024-06-21 16:13:26,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:26,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:26,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:26,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:13:26,624 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:13:26,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:26,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1237291837, now seen corresponding path program 2 times [2024-06-21 16:13:26,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:26,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631918972] [2024-06-21 16:13:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:26,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:27,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:27,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631918972] [2024-06-21 16:13:27,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631918972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:27,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:27,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:13:27,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623125048] [2024-06-21 16:13:27,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:27,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:13:27,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:27,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:13:27,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:13:27,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:13:27,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 172 transitions, 1668 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:27,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:27,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:13:27,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:30,470 INFO L124 PetriNetUnfolderBase]: 14471/20445 cut-off events. [2024-06-21 16:13:30,470 INFO L125 PetriNetUnfolderBase]: For 815293/815304 co-relation queries the response was YES. [2024-06-21 16:13:30,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140561 conditions, 20445 events. 14471/20445 cut-off events. For 815293/815304 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 117814 event pairs, 6562 based on Foata normal form. 7/20436 useless extension candidates. Maximal degree in co-relation 140508. Up to 19560 conditions per place. [2024-06-21 16:13:30,632 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 158 selfloop transitions, 14 changer transitions 0/190 dead transitions. [2024-06-21 16:13:30,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 190 transitions, 2058 flow [2024-06-21 16:13:30,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:13:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:13:30,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 16:13:30,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559748427672956 [2024-06-21 16:13:30,633 INFO L175 Difference]: Start difference. First operand has 130 places, 172 transitions, 1668 flow. Second operand 6 states and 145 transitions. [2024-06-21 16:13:30,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 190 transitions, 2058 flow [2024-06-21 16:13:31,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 190 transitions, 1894 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-21 16:13:31,026 INFO L231 Difference]: Finished difference. Result has 130 places, 172 transitions, 1541 flow [2024-06-21 16:13:31,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1541, PETRI_PLACES=130, PETRI_TRANSITIONS=172} [2024-06-21 16:13:31,027 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-21 16:13:31,027 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 172 transitions, 1541 flow [2024-06-21 16:13:31,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:31,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:31,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:31,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:13:31,028 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:13:31,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:31,028 INFO L85 PathProgramCache]: Analyzing trace with hash 400414969, now seen corresponding path program 1 times [2024-06-21 16:13:31,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:31,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129522383] [2024-06-21 16:13:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:31,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:31,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:31,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129522383] [2024-06-21 16:13:31,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129522383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:31,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:31,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:13:31,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775380568] [2024-06-21 16:13:31,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:31,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:13:31,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:31,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:13:31,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:13:31,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:13:31,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 172 transitions, 1541 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:31,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:31,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:13:31,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:35,101 INFO L124 PetriNetUnfolderBase]: 15187/21182 cut-off events. [2024-06-21 16:13:35,101 INFO L125 PetriNetUnfolderBase]: For 862875/862879 co-relation queries the response was YES. [2024-06-21 16:13:35,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147063 conditions, 21182 events. 15187/21182 cut-off events. For 862875/862879 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 118843 event pairs, 6564 based on Foata normal form. 6/21187 useless extension candidates. Maximal degree in co-relation 147009. Up to 20544 conditions per place. [2024-06-21 16:13:35,296 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 176 selfloop transitions, 21 changer transitions 0/203 dead transitions. [2024-06-21 16:13:35,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 203 transitions, 2253 flow [2024-06-21 16:13:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:13:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:13:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 16:13:35,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-21 16:13:35,298 INFO L175 Difference]: Start difference. First operand has 130 places, 172 transitions, 1541 flow. Second operand 6 states and 147 transitions. [2024-06-21 16:13:35,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 203 transitions, 2253 flow [2024-06-21 16:13:35,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 203 transitions, 2199 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:13:35,793 INFO L231 Difference]: Finished difference. Result has 131 places, 180 transitions, 1690 flow [2024-06-21 16:13:35,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1690, PETRI_PLACES=131, PETRI_TRANSITIONS=180} [2024-06-21 16:13:35,794 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-21 16:13:35,794 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 180 transitions, 1690 flow [2024-06-21 16:13:35,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:35,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:35,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:35,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:13:35,794 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:13:35,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1265695339, now seen corresponding path program 2 times [2024-06-21 16:13:35,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:35,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852807582] [2024-06-21 16:13:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:35,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:36,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:36,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852807582] [2024-06-21 16:13:36,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852807582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:36,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:36,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:13:36,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882203078] [2024-06-21 16:13:36,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:36,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:13:36,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:36,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:13:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:13:36,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:13:36,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 180 transitions, 1690 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:36,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:36,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:13:36,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:39,567 INFO L124 PetriNetUnfolderBase]: 15180/21174 cut-off events. [2024-06-21 16:13:39,567 INFO L125 PetriNetUnfolderBase]: For 919843/919847 co-relation queries the response was YES. [2024-06-21 16:13:39,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151270 conditions, 21174 events. 15180/21174 cut-off events. For 919843/919847 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 118907 event pairs, 6519 based on Foata normal form. 6/21179 useless extension candidates. Maximal degree in co-relation 151215. Up to 20537 conditions per place. [2024-06-21 16:13:39,749 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 171 selfloop transitions, 21 changer transitions 0/198 dead transitions. [2024-06-21 16:13:39,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 198 transitions, 2120 flow [2024-06-21 16:13:39,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:13:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:13:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 16:13:39,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2024-06-21 16:13:39,750 INFO L175 Difference]: Start difference. First operand has 131 places, 180 transitions, 1690 flow. Second operand 6 states and 142 transitions. [2024-06-21 16:13:39,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 198 transitions, 2120 flow [2024-06-21 16:13:40,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 198 transitions, 1992 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-21 16:13:40,241 INFO L231 Difference]: Finished difference. Result has 135 places, 180 transitions, 1613 flow [2024-06-21 16:13:40,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1613, PETRI_PLACES=135, PETRI_TRANSITIONS=180} [2024-06-21 16:13:40,242 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-21 16:13:40,242 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 180 transitions, 1613 flow [2024-06-21 16:13:40,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:40,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:40,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:40,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:13:40,242 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:13:40,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:40,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1866865515, now seen corresponding path program 1 times [2024-06-21 16:13:40,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:40,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257541559] [2024-06-21 16:13:40,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:40,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:41,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:41,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257541559] [2024-06-21 16:13:41,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257541559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:41,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:41,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:13:41,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917278333] [2024-06-21 16:13:41,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:41,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:13:41,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:41,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:13:41,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:13:41,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:13:41,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 180 transitions, 1613 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:41,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:41,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:13:41,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand