./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix028_power.oepc_pso.oepc_rmo.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/mutex-meet-nonrel/mix028_power.oepc_pso.oepc_rmo.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/mix028_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix028_power.oepc_pso.oepc_rmo.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 20:54:05,362 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:54:05,425 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:54:05,430 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:54:05,430 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:54:05,455 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:54:05,455 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:54:05,455 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:54:05,456 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:54:05,459 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:54:05,459 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:54:05,459 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:54:05,460 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:54:05,461 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:54:05,461 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:54:05,461 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:54:05,462 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:54:05,462 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:54:05,462 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:54:05,462 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:54:05,462 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:54:05,463 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:54:05,463 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:54:05,463 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:54:05,463 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:54:05,463 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:54:05,464 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:54:05,464 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:54:05,464 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:54:05,464 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:54:05,465 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:54:05,465 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:54:05,466 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:54:05,466 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:54:05,466 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:54:05,466 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:54:05,466 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:54:05,466 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:54:05,467 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:54:05,467 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:54:05,467 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:54:05,467 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:54:05,467 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:54:05,468 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:54:05,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:54:05,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:54:05,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:54:05,686 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:54:05,686 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:54:05,687 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix028_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 20:54:06,645 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:54:06,836 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:54:06,837 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix028_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 20:54:06,847 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cfa5315f/d4db7786d78e4a808a3a0033594a447b/FLAG29d9ce71e [2024-06-21 20:54:06,858 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cfa5315f/d4db7786d78e4a808a3a0033594a447b [2024-06-21 20:54:06,860 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:54:06,860 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:54:06,861 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix028_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 20:54:07,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:54:07,002 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:54:07,003 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:54:07,003 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:54:07,007 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:54:07,008 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:54:06" (1/2) ... [2024-06-21 20:54:07,009 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e790887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:54:07, skipping insertion in model container [2024-06-21 20:54:07,009 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:54:06" (1/2) ... [2024-06-21 20:54:07,010 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4e6097d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:54:07, skipping insertion in model container [2024-06-21 20:54:07,011 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:54:07" (2/2) ... [2024-06-21 20:54:07,011 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e790887 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:54:07, skipping insertion in model container [2024-06-21 20:54:07,012 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:54:07" (2/2) ... [2024-06-21 20:54:07,012 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:54:07,092 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:54:07,094 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((! multithreaded || z$r_buff0_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-21 20:54:07,094 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((! multithreaded || z$r_buff0_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-21 20:54:07,094 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((! multithreaded || z$r_buff0_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-21 20:54:07,094 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:54:07,094 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-21 20:54:07,131 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:54:07,413 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:54:07,420 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:54:07,542 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:54:07,574 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:54:07,574 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:54:07 WrapperNode [2024-06-21 20:54:07,575 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:54:07,575 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:54:07,575 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:54:07,575 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:54:07,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:54:07" (1/1) ... [2024-06-21 20:54:07,598 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:54:07" (1/1) ... [2024-06-21 20:54:07,643 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-21 20:54:07,644 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:54:07,644 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:54:07,644 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:54:07,645 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:54:07,653 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:54:07" (1/1) ... [2024-06-21 20:54:07,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:54:07" (1/1) ... [2024-06-21 20:54:07,658 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:54:07" (1/1) ... [2024-06-21 20:54:07,679 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 20:54:07,679 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:54:07" (1/1) ... [2024-06-21 20:54:07,680 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:54:07" (1/1) ... [2024-06-21 20:54:07,688 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:54:07" (1/1) ... [2024-06-21 20:54:07,693 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:54:07" (1/1) ... [2024-06-21 20:54:07,695 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:54:07" (1/1) ... [2024-06-21 20:54:07,697 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:54:07" (1/1) ... [2024-06-21 20:54:07,699 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:54:07,700 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:54:07,700 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:54:07,700 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:54:07,701 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:54:07" (1/1) ... [2024-06-21 20:54:07,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:54:07,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:54:07,730 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 20:54:07,749 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 20:54:07,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:54:07,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:54:07,764 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:54:07,765 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:54:07,765 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:54:07,765 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:54:07,765 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:54:07,765 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:54:07,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:54:07,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:54:07,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:54:07,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:54:07,767 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 20:54:07,905 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:54:07,906 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:54:08,233 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:54:08,234 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:54:08,411 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:54:08,411 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:54:08,412 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:54:08 BoogieIcfgContainer [2024-06-21 20:54:08,412 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:54:08,414 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:54:08,414 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:54:08,416 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:54:08,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:54:06" (1/4) ... [2024-06-21 20:54:08,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f78bdb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:54:08, skipping insertion in model container [2024-06-21 20:54:08,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:54:07" (2/4) ... [2024-06-21 20:54:08,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f78bdb8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:54:08, skipping insertion in model container [2024-06-21 20:54:08,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:54:07" (3/4) ... [2024-06-21 20:54:08,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f78bdb8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:54:08, skipping insertion in model container [2024-06-21 20:54:08,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:54:08" (4/4) ... [2024-06-21 20:54:08,419 INFO L112 eAbstractionObserver]: Analyzing ICFG mix028_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 20:54:08,431 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:54:08,432 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:54:08,432 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:54:08,467 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:54:08,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 20:54:08,523 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 20:54:08,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:54:08,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:54:08,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 20:54:08,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 20:54:08,540 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:54:08,545 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;@742c98d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:54:08,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:54:08,548 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:54:08,548 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:54:08,548 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:54:08,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:08,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:54:08,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:08,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:08,552 INFO L85 PathProgramCache]: Analyzing trace with hash 368241174, now seen corresponding path program 1 times [2024-06-21 20:54:08,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:08,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63069383] [2024-06-21 20:54:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:08,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:09,587 INFO 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 20:54:09,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:09,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63069383] [2024-06-21 20:54:09,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63069383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:09,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:09,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:54:09,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987834777] [2024-06-21 20:54:09,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:09,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:54:09,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:09,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:54:09,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:54:09,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:54:09,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:09,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:09,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:54:09,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:10,027 INFO L124 PetriNetUnfolderBase]: 1659/2537 cut-off events. [2024-06-21 20:54:10,027 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 20:54:10,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5101 conditions, 2537 events. 1659/2537 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12032 event pairs, 1184 based on Foata normal form. 1/2485 useless extension candidates. Maximal degree in co-relation 5089. Up to 2465 conditions per place. [2024-06-21 20:54:10,047 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 33 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 20:54:10,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 173 flow [2024-06-21 20:54:10,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:54:10,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:54:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-21 20:54:10,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-21 20:54:10,059 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 73 transitions. [2024-06-21 20:54:10,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 173 flow [2024-06-21 20:54:10,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:54:10,064 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 20:54:10,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 20:54:10,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 20:54:10,091 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 20:54:10,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:10,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:10,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:10,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:54:10,092 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:10,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:10,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1692467381, now seen corresponding path program 1 times [2024-06-21 20:54:10,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:10,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130973908] [2024-06-21 20:54:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:10,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:10,604 INFO 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 20:54:10,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:10,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130973908] [2024-06-21 20:54:10,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130973908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:10,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:10,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:54:10,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017380732] [2024-06-21 20:54:10,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:10,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:54:10,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:10,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:54:10,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:54:10,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:54:10,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:10,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:10,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:54:10,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:10,927 INFO L124 PetriNetUnfolderBase]: 1653/2528 cut-off events. [2024-06-21 20:54:10,928 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-06-21 20:54:10,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5717 conditions, 2528 events. 1653/2528 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12035 event pairs, 1038 based on Foata normal form. 3/2518 useless extension candidates. Maximal degree in co-relation 5705. Up to 2441 conditions per place. [2024-06-21 20:54:10,941 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-21 20:54:10,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 240 flow [2024-06-21 20:54:10,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:54:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:54:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-21 20:54:10,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-21 20:54:10,945 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 94 transitions. [2024-06-21 20:54:10,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 240 flow [2024-06-21 20:54:10,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:54:10,947 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 20:54:10,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 20:54:10,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 20:54:10,948 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 20:54:10,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:10,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:10,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:10,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:54:10,951 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:10,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:10,951 INFO L85 PathProgramCache]: Analyzing trace with hash 926881865, now seen corresponding path program 1 times [2024-06-21 20:54:10,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:10,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938504886] [2024-06-21 20:54:10,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:10,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:11,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:11,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938504886] [2024-06-21 20:54:11,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938504886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:11,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:11,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:54:11,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664402465] [2024-06-21 20:54:11,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:11,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:54:11,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:11,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:54:11,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:54:11,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:54:11,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:11,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:11,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:54:11,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:11,924 INFO L124 PetriNetUnfolderBase]: 1661/2558 cut-off events. [2024-06-21 20:54:11,924 INFO L125 PetriNetUnfolderBase]: For 1306/1306 co-relation queries the response was YES. [2024-06-21 20:54:11,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6384 conditions, 2558 events. 1661/2558 cut-off events. For 1306/1306 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12206 event pairs, 812 based on Foata normal form. 5/2562 useless extension candidates. Maximal degree in co-relation 6370. Up to 2387 conditions per place. [2024-06-21 20:54:11,935 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-21 20:54:11,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 394 flow [2024-06-21 20:54:11,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:54:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:54:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 20:54:11,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:54:11,937 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 123 transitions. [2024-06-21 20:54:11,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 394 flow [2024-06-21 20:54:11,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 380 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:54:11,940 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-21 20:54:11,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-21 20:54:11,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-21 20:54:11,940 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-21 20:54:11,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:11,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:11,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:11,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:54:11,941 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:11,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash -721908760, now seen corresponding path program 1 times [2024-06-21 20:54:11,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:11,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770586948] [2024-06-21 20:54:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:11,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:12,618 INFO 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 20:54:12,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:12,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770586948] [2024-06-21 20:54:12,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770586948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:12,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:12,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:54:12,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832726975] [2024-06-21 20:54:12,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:12,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:54:12,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:54:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:54:12,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:54:12,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 20:54:12,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:12,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:54:12,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:13,039 INFO L124 PetriNetUnfolderBase]: 1669/2570 cut-off events. [2024-06-21 20:54:13,040 INFO L125 PetriNetUnfolderBase]: For 3038/3040 co-relation queries the response was YES. [2024-06-21 20:54:13,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7503 conditions, 2570 events. 1669/2570 cut-off events. For 3038/3040 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12288 event pairs, 666 based on Foata normal form. 7/2576 useless extension candidates. Maximal degree in co-relation 7486. Up to 2373 conditions per place. [2024-06-21 20:54:13,053 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 60 selfloop transitions, 20 changer transitions 0/85 dead transitions. [2024-06-21 20:54:13,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 85 transitions, 521 flow [2024-06-21 20:54:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:54:13,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:54:13,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 20:54:13,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-21 20:54:13,056 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 6 states and 145 transitions. [2024-06-21 20:54:13,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 85 transitions, 521 flow [2024-06-21 20:54:13,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 85 transitions, 513 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 20:54:13,063 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 308 flow [2024-06-21 20:54:13,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-06-21 20:54:13,068 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-21 20:54:13,068 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 308 flow [2024-06-21 20:54:13,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 20:54:13,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:13,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:13,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:54:13,069 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:13,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1675262408, now seen corresponding path program 1 times [2024-06-21 20:54:13,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:13,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966328238] [2024-06-21 20:54:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:13,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:13,975 INFO 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 20:54:13,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:13,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966328238] [2024-06-21 20:54:13,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966328238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:13,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:13,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:54:13,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608609774] [2024-06-21 20:54:13,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:13,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:54:13,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:13,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:54:13,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:54:14,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:54:14,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 308 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:14,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:14,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:54:14,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:14,522 INFO L124 PetriNetUnfolderBase]: 1681/2590 cut-off events. [2024-06-21 20:54:14,522 INFO L125 PetriNetUnfolderBase]: For 4787/4789 co-relation queries the response was YES. [2024-06-21 20:54:14,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8374 conditions, 2590 events. 1681/2590 cut-off events. For 4787/4789 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12415 event pairs, 502 based on Foata normal form. 12/2601 useless extension candidates. Maximal degree in co-relation 8354. Up to 2341 conditions per place. [2024-06-21 20:54:14,536 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 64 selfloop transitions, 23 changer transitions 0/92 dead transitions. [2024-06-21 20:54:14,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 622 flow [2024-06-21 20:54:14,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:14,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 20:54:14,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-21 20:54:14,537 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 308 flow. Second operand 7 states and 163 transitions. [2024-06-21 20:54:14,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 622 flow [2024-06-21 20:54:14,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 573 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:54:14,541 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 335 flow [2024-06-21 20:54:14,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=335, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-21 20:54:14,542 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-21 20:54:14,542 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 335 flow [2024-06-21 20:54:14,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:14,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:14,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:14,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:54:14,543 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:14,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:14,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1549786196, now seen corresponding path program 1 times [2024-06-21 20:54:14,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:14,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426921457] [2024-06-21 20:54:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:14,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:14,954 INFO 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 20:54:14,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:14,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426921457] [2024-06-21 20:54:14,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426921457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:14,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:14,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:54:14,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395734636] [2024-06-21 20:54:14,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:14,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:54:14,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:14,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:54:14,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:54:15,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:15,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 335 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:15,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:15,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:15,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:15,408 INFO L124 PetriNetUnfolderBase]: 1676/2579 cut-off events. [2024-06-21 20:54:15,408 INFO L125 PetriNetUnfolderBase]: For 6458/6458 co-relation queries the response was YES. [2024-06-21 20:54:15,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8897 conditions, 2579 events. 1676/2579 cut-off events. For 6458/6458 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12271 event pairs, 659 based on Foata normal form. 2/2580 useless extension candidates. Maximal degree in co-relation 8875. Up to 2484 conditions per place. [2024-06-21 20:54:15,428 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 54 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-21 20:54:15,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 66 transitions, 487 flow [2024-06-21 20:54:15,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:54:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:54:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 20:54:15,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-21 20:54:15,429 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 335 flow. Second operand 5 states and 91 transitions. [2024-06-21 20:54:15,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 66 transitions, 487 flow [2024-06-21 20:54:15,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 66 transitions, 423 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 20:54:15,435 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 295 flow [2024-06-21 20:54:15,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-21 20:54:15,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-21 20:54:15,437 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 295 flow [2024-06-21 20:54:15,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:15,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:15,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:15,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:54:15,438 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:15,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:15,439 INFO L85 PathProgramCache]: Analyzing trace with hash 798329682, now seen corresponding path program 1 times [2024-06-21 20:54:15,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:15,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690649943] [2024-06-21 20:54:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:15,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:15,913 INFO 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 20:54:15,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:15,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690649943] [2024-06-21 20:54:15,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690649943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:15,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:15,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:54:15,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300205696] [2024-06-21 20:54:15,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:15,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:54:15,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:15,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:54:15,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:54:15,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:15,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 295 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:15,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:15,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:15,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:16,524 INFO L124 PetriNetUnfolderBase]: 1932/2871 cut-off events. [2024-06-21 20:54:16,528 INFO L125 PetriNetUnfolderBase]: For 8815/8815 co-relation queries the response was YES. [2024-06-21 20:54:16,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10013 conditions, 2871 events. 1932/2871 cut-off events. For 8815/8815 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13034 event pairs, 727 based on Foata normal form. 6/2876 useless extension candidates. Maximal degree in co-relation 9989. Up to 2802 conditions per place. [2024-06-21 20:54:16,541 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 65 selfloop transitions, 17 changer transitions 0/85 dead transitions. [2024-06-21 20:54:16,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 589 flow [2024-06-21 20:54:16,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:54:16,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:54:16,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 20:54:16,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 20:54:16,542 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 295 flow. Second operand 6 states and 110 transitions. [2024-06-21 20:54:16,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 589 flow [2024-06-21 20:54:16,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 567 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:54:16,547 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 404 flow [2024-06-21 20:54:16,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=404, PETRI_PLACES=62, PETRI_TRANSITIONS=66} [2024-06-21 20:54:16,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-21 20:54:16,549 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 404 flow [2024-06-21 20:54:16,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:16,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:16,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:16,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:54:16,549 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:16,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:16,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2006007427, now seen corresponding path program 1 times [2024-06-21 20:54:16,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:16,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216249670] [2024-06-21 20:54:16,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:16,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:17,138 INFO 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 20:54:17,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:17,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216249670] [2024-06-21 20:54:17,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216249670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:17,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:17,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:54:17,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123985621] [2024-06-21 20:54:17,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:17,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:54:17,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:17,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:54:17,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:54:17,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:17,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 66 transitions, 404 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:17,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:17,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:17,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:17,612 INFO L124 PetriNetUnfolderBase]: 1744/2686 cut-off events. [2024-06-21 20:54:17,612 INFO L125 PetriNetUnfolderBase]: For 10832/10846 co-relation queries the response was YES. [2024-06-21 20:54:17,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10190 conditions, 2686 events. 1744/2686 cut-off events. For 10832/10846 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12861 event pairs, 651 based on Foata normal form. 8/2678 useless extension candidates. Maximal degree in co-relation 10164. Up to 2489 conditions per place. [2024-06-21 20:54:17,628 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 63 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-21 20:54:17,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 668 flow [2024-06-21 20:54:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:54:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:54:17,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 20:54:17,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-21 20:54:17,630 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 404 flow. Second operand 6 states and 116 transitions. [2024-06-21 20:54:17,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 668 flow [2024-06-21 20:54:17,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 650 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 20:54:17,642 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 458 flow [2024-06-21 20:54:17,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=458, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-21 20:54:17,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-21 20:54:17,644 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 458 flow [2024-06-21 20:54:17,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:17,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:17,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:17,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:54:17,645 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:17,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:17,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1009077837, now seen corresponding path program 2 times [2024-06-21 20:54:17,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:17,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462890849] [2024-06-21 20:54:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:17,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:18,093 INFO 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 20:54:18,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:18,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462890849] [2024-06-21 20:54:18,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462890849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:18,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:18,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:54:18,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152131277] [2024-06-21 20:54:18,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:18,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:54:18,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:18,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:54:18,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:54:18,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:18,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 458 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:18,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:18,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:18,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:18,593 INFO L124 PetriNetUnfolderBase]: 1729/2660 cut-off events. [2024-06-21 20:54:18,593 INFO L125 PetriNetUnfolderBase]: For 12020/12030 co-relation queries the response was YES. [2024-06-21 20:54:18,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10270 conditions, 2660 events. 1729/2660 cut-off events. For 12020/12030 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12689 event pairs, 647 based on Foata normal form. 2/2646 useless extension candidates. Maximal degree in co-relation 10241. Up to 2530 conditions per place. [2024-06-21 20:54:18,605 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 66 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2024-06-21 20:54:18,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 650 flow [2024-06-21 20:54:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:54:18,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:54:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 20:54:18,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-21 20:54:18,606 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 458 flow. Second operand 6 states and 107 transitions. [2024-06-21 20:54:18,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 650 flow [2024-06-21 20:54:18,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 621 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:54:18,617 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 459 flow [2024-06-21 20:54:18,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=459, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-21 20:54:18,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-21 20:54:18,618 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 459 flow [2024-06-21 20:54:18,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:18,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:18,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:18,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:54:18,619 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:18,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:18,620 INFO L85 PathProgramCache]: Analyzing trace with hash -62117735, now seen corresponding path program 1 times [2024-06-21 20:54:18,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:18,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756353487] [2024-06-21 20:54:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:18,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:19,249 INFO 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 20:54:19,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:19,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756353487] [2024-06-21 20:54:19,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756353487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:19,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:19,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:54:19,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143304450] [2024-06-21 20:54:19,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:19,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:54:19,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:19,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:54:19,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:54:19,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:19,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 459 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:19,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:19,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:19,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:19,717 INFO L124 PetriNetUnfolderBase]: 2091/3095 cut-off events. [2024-06-21 20:54:19,717 INFO L125 PetriNetUnfolderBase]: For 17153/17153 co-relation queries the response was YES. [2024-06-21 20:54:19,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12368 conditions, 3095 events. 2091/3095 cut-off events. For 17153/17153 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14121 event pairs, 649 based on Foata normal form. 12/3106 useless extension candidates. Maximal degree in co-relation 12338. Up to 2721 conditions per place. [2024-06-21 20:54:19,735 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 87 selfloop transitions, 31 changer transitions 0/121 dead transitions. [2024-06-21 20:54:19,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 121 transitions, 985 flow [2024-06-21 20:54:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:19,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 20:54:19,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-21 20:54:19,737 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 459 flow. Second operand 7 states and 139 transitions. [2024-06-21 20:54:19,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 121 transitions, 985 flow [2024-06-21 20:54:19,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 121 transitions, 938 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:19,749 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 660 flow [2024-06-21 20:54:19,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=660, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2024-06-21 20:54:19,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-21 20:54:19,751 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 660 flow [2024-06-21 20:54:19,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:19,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:19,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:19,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:54:19,752 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:19,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:19,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1679359571, now seen corresponding path program 2 times [2024-06-21 20:54:19,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:19,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725349649] [2024-06-21 20:54:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:19,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:20,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:20,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725349649] [2024-06-21 20:54:20,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725349649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:20,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:20,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:54:20,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445063710] [2024-06-21 20:54:20,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:20,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:54:20,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:20,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:54:20,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:54:20,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:20,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 660 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:20,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:20,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:20,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:20,911 INFO L124 PetriNetUnfolderBase]: 2127/3145 cut-off events. [2024-06-21 20:54:20,912 INFO L125 PetriNetUnfolderBase]: For 22864/22864 co-relation queries the response was YES. [2024-06-21 20:54:20,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14507 conditions, 3145 events. 2127/3145 cut-off events. For 22864/22864 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14321 event pairs, 700 based on Foata normal form. 6/3150 useless extension candidates. Maximal degree in co-relation 14473. Up to 3007 conditions per place. [2024-06-21 20:54:20,936 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 97 selfloop transitions, 23 changer transitions 0/123 dead transitions. [2024-06-21 20:54:20,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 123 transitions, 1142 flow [2024-06-21 20:54:20,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:20,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 20:54:20,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-21 20:54:20,938 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 660 flow. Second operand 7 states and 129 transitions. [2024-06-21 20:54:20,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 123 transitions, 1142 flow [2024-06-21 20:54:20,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 123 transitions, 1098 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-21 20:54:20,953 INFO L231 Difference]: Finished difference. Result has 81 places, 96 transitions, 768 flow [2024-06-21 20:54:20,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=768, PETRI_PLACES=81, PETRI_TRANSITIONS=96} [2024-06-21 20:54:20,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-21 20:54:20,954 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 96 transitions, 768 flow [2024-06-21 20:54:20,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:20,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:20,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:20,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:54:20,955 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:20,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:20,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1691865281, now seen corresponding path program 3 times [2024-06-21 20:54:20,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:20,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562108285] [2024-06-21 20:54:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:20,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:21,564 INFO 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 20:54:21,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:21,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562108285] [2024-06-21 20:54:21,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562108285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:21,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:21,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:54:21,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221193398] [2024-06-21 20:54:21,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:21,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:54:21,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:21,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:54:21,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:54:21,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:21,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 96 transitions, 768 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:21,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:21,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:21,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:22,236 INFO L124 PetriNetUnfolderBase]: 2131/3151 cut-off events. [2024-06-21 20:54:22,236 INFO L125 PetriNetUnfolderBase]: For 27428/27428 co-relation queries the response was YES. [2024-06-21 20:54:22,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15155 conditions, 3151 events. 2131/3151 cut-off events. For 27428/27428 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14366 event pairs, 694 based on Foata normal form. 6/3156 useless extension candidates. Maximal degree in co-relation 15117. Up to 3076 conditions per place. [2024-06-21 20:54:22,263 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 100 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2024-06-21 20:54:22,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 124 transitions, 1170 flow [2024-06-21 20:54:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 20:54:22,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-21 20:54:22,265 INFO L175 Difference]: Start difference. First operand has 81 places, 96 transitions, 768 flow. Second operand 7 states and 125 transitions. [2024-06-21 20:54:22,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 124 transitions, 1170 flow [2024-06-21 20:54:22,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 124 transitions, 1121 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 20:54:22,289 INFO L231 Difference]: Finished difference. Result has 86 places, 102 transitions, 846 flow [2024-06-21 20:54:22,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=846, PETRI_PLACES=86, PETRI_TRANSITIONS=102} [2024-06-21 20:54:22,290 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-21 20:54:22,290 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 102 transitions, 846 flow [2024-06-21 20:54:22,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:22,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:22,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:22,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:54:22,290 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:22,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:22,291 INFO L85 PathProgramCache]: Analyzing trace with hash 115259863, now seen corresponding path program 1 times [2024-06-21 20:54:22,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:22,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420089097] [2024-06-21 20:54:22,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:22,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:23,084 INFO 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 20:54:23,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:23,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420089097] [2024-06-21 20:54:23,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420089097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:23,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:23,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:54:23,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349335824] [2024-06-21 20:54:23,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:23,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:54:23,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:23,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:54:23,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:54:23,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:23,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 102 transitions, 846 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:23,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:23,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:23,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:23,763 INFO L124 PetriNetUnfolderBase]: 2134/3156 cut-off events. [2024-06-21 20:54:23,763 INFO L125 PetriNetUnfolderBase]: For 30079/30079 co-relation queries the response was YES. [2024-06-21 20:54:23,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15526 conditions, 3156 events. 2134/3156 cut-off events. For 30079/30079 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14430 event pairs, 673 based on Foata normal form. 6/3161 useless extension candidates. Maximal degree in co-relation 15486. Up to 3061 conditions per place. [2024-06-21 20:54:23,784 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 99 selfloop transitions, 25 changer transitions 0/127 dead transitions. [2024-06-21 20:54:23,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 127 transitions, 1228 flow [2024-06-21 20:54:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 20:54:23,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:54:23,786 INFO L175 Difference]: Start difference. First operand has 86 places, 102 transitions, 846 flow. Second operand 7 states and 126 transitions. [2024-06-21 20:54:23,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 127 transitions, 1228 flow [2024-06-21 20:54:23,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 127 transitions, 1175 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:54:23,808 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 889 flow [2024-06-21 20:54:23,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-06-21 20:54:23,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-21 20:54:23,808 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 889 flow [2024-06-21 20:54:23,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:23,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:23,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:23,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:54:23,809 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:23,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:23,809 INFO L85 PathProgramCache]: Analyzing trace with hash -842309822, now seen corresponding path program 1 times [2024-06-21 20:54:23,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:23,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122915565] [2024-06-21 20:54:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:23,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:24,232 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 20:54:24,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:24,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122915565] [2024-06-21 20:54:24,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122915565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:24,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:24,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:54:24,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260935516] [2024-06-21 20:54:24,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:24,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:54:24,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:54:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:54:24,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:24,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 889 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:24,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:24,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:24,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:24,741 INFO L124 PetriNetUnfolderBase]: 2131/3152 cut-off events. [2024-06-21 20:54:24,741 INFO L125 PetriNetUnfolderBase]: For 32999/32999 co-relation queries the response was YES. [2024-06-21 20:54:24,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15971 conditions, 3152 events. 2131/3152 cut-off events. For 32999/32999 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14345 event pairs, 697 based on Foata normal form. 1/3152 useless extension candidates. Maximal degree in co-relation 15930. Up to 3137 conditions per place. [2024-06-21 20:54:24,757 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 102 selfloop transitions, 8 changer transitions 0/113 dead transitions. [2024-06-21 20:54:24,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 113 transitions, 1129 flow [2024-06-21 20:54:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:54:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:54:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-21 20:54:24,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-21 20:54:24,758 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 889 flow. Second operand 5 states and 83 transitions. [2024-06-21 20:54:24,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 113 transitions, 1129 flow [2024-06-21 20:54:24,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 113 transitions, 1049 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:54:24,776 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 831 flow [2024-06-21 20:54:24,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=831, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-06-21 20:54:24,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-21 20:54:24,777 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 831 flow [2024-06-21 20:54:24,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:24,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:24,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:24,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:54:24,777 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:24,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:24,778 INFO L85 PathProgramCache]: Analyzing trace with hash 663410780, now seen corresponding path program 1 times [2024-06-21 20:54:24,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:24,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446771263] [2024-06-21 20:54:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:24,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:25,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:25,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446771263] [2024-06-21 20:54:25,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446771263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:25,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:25,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:54:25,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891259662] [2024-06-21 20:54:25,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:25,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:54:25,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:25,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:54:25,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:54:25,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:25,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 831 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:25,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:25,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:25,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:26,038 INFO L124 PetriNetUnfolderBase]: 2008/3035 cut-off events. [2024-06-21 20:54:26,039 INFO L125 PetriNetUnfolderBase]: For 35200/35236 co-relation queries the response was YES. [2024-06-21 20:54:26,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15402 conditions, 3035 events. 2008/3035 cut-off events. For 35200/35236 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14309 event pairs, 612 based on Foata normal form. 14/3028 useless extension candidates. Maximal degree in co-relation 15360. Up to 2758 conditions per place. [2024-06-21 20:54:26,056 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 96 selfloop transitions, 26 changer transitions 0/138 dead transitions. [2024-06-21 20:54:26,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 138 transitions, 1277 flow [2024-06-21 20:54:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:26,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:26,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 20:54:26,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-21 20:54:26,058 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 831 flow. Second operand 7 states and 135 transitions. [2024-06-21 20:54:26,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 138 transitions, 1277 flow [2024-06-21 20:54:26,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 138 transitions, 1253 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:54:26,079 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 953 flow [2024-06-21 20:54:26,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=953, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-21 20:54:26,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-21 20:54:26,080 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 953 flow [2024-06-21 20:54:26,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:26,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:26,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:26,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:54:26,081 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:26,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:26,081 INFO L85 PathProgramCache]: Analyzing trace with hash 663500990, now seen corresponding path program 2 times [2024-06-21 20:54:26,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:26,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250069118] [2024-06-21 20:54:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:26,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:26,956 INFO 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 20:54:26,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:26,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250069118] [2024-06-21 20:54:26,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250069118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:26,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:26,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:54:26,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590956053] [2024-06-21 20:54:26,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:26,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:54:26,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:26,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:54:26,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:54:27,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:27,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 953 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:27,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:27,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:27,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:27,500 INFO L124 PetriNetUnfolderBase]: 2003/3028 cut-off events. [2024-06-21 20:54:27,501 INFO L125 PetriNetUnfolderBase]: For 39866/39902 co-relation queries the response was YES. [2024-06-21 20:54:27,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15997 conditions, 3028 events. 2003/3028 cut-off events. For 39866/39902 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14288 event pairs, 612 based on Foata normal form. 14/3021 useless extension candidates. Maximal degree in co-relation 15955. Up to 2786 conditions per place. [2024-06-21 20:54:27,517 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 95 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-21 20:54:27,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 133 transitions, 1243 flow [2024-06-21 20:54:27,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 20:54:27,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-21 20:54:27,518 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 953 flow. Second operand 7 states and 130 transitions. [2024-06-21 20:54:27,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 133 transitions, 1243 flow [2024-06-21 20:54:27,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 133 transitions, 1162 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 20:54:27,546 INFO L231 Difference]: Finished difference. Result has 96 places, 111 transitions, 924 flow [2024-06-21 20:54:27,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=924, PETRI_PLACES=96, PETRI_TRANSITIONS=111} [2024-06-21 20:54:27,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-21 20:54:27,546 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 111 transitions, 924 flow [2024-06-21 20:54:27,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:27,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:27,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:27,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:54:27,547 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:27,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:27,547 INFO L85 PathProgramCache]: Analyzing trace with hash 667225795, now seen corresponding path program 1 times [2024-06-21 20:54:27,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:27,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923300259] [2024-06-21 20:54:27,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:27,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:28,140 INFO 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 20:54:28,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:28,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923300259] [2024-06-21 20:54:28,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923300259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:28,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:28,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:54:28,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257755527] [2024-06-21 20:54:28,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:28,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:54:28,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:28,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:54:28,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:54:28,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:28,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 924 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:28,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:28,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:28,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:28,696 INFO L124 PetriNetUnfolderBase]: 2221/3283 cut-off events. [2024-06-21 20:54:28,697 INFO L125 PetriNetUnfolderBase]: For 46889/46891 co-relation queries the response was YES. [2024-06-21 20:54:28,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17710 conditions, 3283 events. 2221/3283 cut-off events. For 46889/46891 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15075 event pairs, 639 based on Foata normal form. 8/3290 useless extension candidates. Maximal degree in co-relation 17666. Up to 2821 conditions per place. [2024-06-21 20:54:28,718 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 102 selfloop transitions, 47 changer transitions 0/152 dead transitions. [2024-06-21 20:54:28,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 152 transitions, 1598 flow [2024-06-21 20:54:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 20:54:28,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-21 20:54:28,719 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 924 flow. Second operand 7 states and 138 transitions. [2024-06-21 20:54:28,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 152 transitions, 1598 flow [2024-06-21 20:54:28,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 152 transitions, 1543 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:28,748 INFO L231 Difference]: Finished difference. Result has 99 places, 120 transitions, 1131 flow [2024-06-21 20:54:28,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1131, PETRI_PLACES=99, PETRI_TRANSITIONS=120} [2024-06-21 20:54:28,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-21 20:54:28,749 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 120 transitions, 1131 flow [2024-06-21 20:54:28,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:28,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:28,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:28,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:54:28,749 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:28,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:28,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1925654069, now seen corresponding path program 2 times [2024-06-21 20:54:28,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:28,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874532656] [2024-06-21 20:54:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:28,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:29,314 INFO 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 20:54:29,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:29,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874532656] [2024-06-21 20:54:29,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874532656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:29,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:29,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:54:29,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691493072] [2024-06-21 20:54:29,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:29,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:54:29,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:29,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:54:29,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:54:29,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:29,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 120 transitions, 1131 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:29,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:29,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:29,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:29,873 INFO L124 PetriNetUnfolderBase]: 2209/3267 cut-off events. [2024-06-21 20:54:29,873 INFO L125 PetriNetUnfolderBase]: For 53103/53105 co-relation queries the response was YES. [2024-06-21 20:54:29,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18644 conditions, 3267 events. 2209/3267 cut-off events. For 53103/53105 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14984 event pairs, 636 based on Foata normal form. 8/3274 useless extension candidates. Maximal degree in co-relation 18597. Up to 2815 conditions per place. [2024-06-21 20:54:29,890 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 103 selfloop transitions, 50 changer transitions 0/156 dead transitions. [2024-06-21 20:54:29,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 156 transitions, 1721 flow [2024-06-21 20:54:29,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 20:54:29,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-21 20:54:29,891 INFO L175 Difference]: Start difference. First operand has 99 places, 120 transitions, 1131 flow. Second operand 7 states and 141 transitions. [2024-06-21 20:54:29,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 156 transitions, 1721 flow [2024-06-21 20:54:29,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 156 transitions, 1626 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 20:54:29,931 INFO L231 Difference]: Finished difference. Result has 105 places, 123 transitions, 1239 flow [2024-06-21 20:54:29,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1239, PETRI_PLACES=105, PETRI_TRANSITIONS=123} [2024-06-21 20:54:29,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-21 20:54:29,932 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 123 transitions, 1239 flow [2024-06-21 20:54:29,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:29,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:29,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:29,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:54:29,933 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:29,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:29,933 INFO L85 PathProgramCache]: Analyzing trace with hash -520336043, now seen corresponding path program 3 times [2024-06-21 20:54:29,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:29,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433117762] [2024-06-21 20:54:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:29,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:30,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:30,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433117762] [2024-06-21 20:54:30,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433117762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:30,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:30,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:54:30,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185669506] [2024-06-21 20:54:30,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:30,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:54:30,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:30,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:54:30,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:54:30,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:30,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 123 transitions, 1239 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:30,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:30,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:30,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:31,054 INFO L124 PetriNetUnfolderBase]: 2213/3272 cut-off events. [2024-06-21 20:54:31,054 INFO L125 PetriNetUnfolderBase]: For 57921/57927 co-relation queries the response was YES. [2024-06-21 20:54:31,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19254 conditions, 3272 events. 2213/3272 cut-off events. For 57921/57927 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14971 event pairs, 680 based on Foata normal form. 12/3283 useless extension candidates. Maximal degree in co-relation 19204. Up to 3164 conditions per place. [2024-06-21 20:54:31,074 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 123 selfloop transitions, 23 changer transitions 0/149 dead transitions. [2024-06-21 20:54:31,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 149 transitions, 1689 flow [2024-06-21 20:54:31,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 20:54:31,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:54:31,075 INFO L175 Difference]: Start difference. First operand has 105 places, 123 transitions, 1239 flow. Second operand 7 states and 126 transitions. [2024-06-21 20:54:31,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 149 transitions, 1689 flow [2024-06-21 20:54:31,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 149 transitions, 1589 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 20:54:31,116 INFO L231 Difference]: Finished difference. Result has 107 places, 127 transitions, 1266 flow [2024-06-21 20:54:31,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1266, PETRI_PLACES=107, PETRI_TRANSITIONS=127} [2024-06-21 20:54:31,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-21 20:54:31,116 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 127 transitions, 1266 flow [2024-06-21 20:54:31,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:31,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:31,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:31,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:54:31,117 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:31,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:31,117 INFO L85 PathProgramCache]: Analyzing trace with hash 946214084, now seen corresponding path program 1 times [2024-06-21 20:54:31,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:31,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509284760] [2024-06-21 20:54:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:31,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:31,797 INFO 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 20:54:31,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:31,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509284760] [2024-06-21 20:54:31,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509284760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:31,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:31,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:54:31,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540264080] [2024-06-21 20:54:31,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:31,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:54:31,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:31,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:54:31,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:54:31,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:31,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 127 transitions, 1266 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:31,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:31,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:31,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:32,394 INFO L124 PetriNetUnfolderBase]: 2215/3274 cut-off events. [2024-06-21 20:54:32,394 INFO L125 PetriNetUnfolderBase]: For 61158/61158 co-relation queries the response was YES. [2024-06-21 20:54:32,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19187 conditions, 3274 events. 2215/3274 cut-off events. For 61158/61158 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14993 event pairs, 667 based on Foata normal form. 3/3276 useless extension candidates. Maximal degree in co-relation 19137. Up to 3168 conditions per place. [2024-06-21 20:54:32,412 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 119 selfloop transitions, 30 changer transitions 0/152 dead transitions. [2024-06-21 20:54:32,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 152 transitions, 1712 flow [2024-06-21 20:54:32,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 20:54:32,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:54:32,413 INFO L175 Difference]: Start difference. First operand has 107 places, 127 transitions, 1266 flow. Second operand 7 states and 126 transitions. [2024-06-21 20:54:32,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 152 transitions, 1712 flow [2024-06-21 20:54:32,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 152 transitions, 1643 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 20:54:32,449 INFO L231 Difference]: Finished difference. Result has 109 places, 131 transitions, 1335 flow [2024-06-21 20:54:32,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1335, PETRI_PLACES=109, PETRI_TRANSITIONS=131} [2024-06-21 20:54:32,450 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-21 20:54:32,450 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 131 transitions, 1335 flow [2024-06-21 20:54:32,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:32,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:32,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:32,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:54:32,451 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:32,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:32,451 INFO L85 PathProgramCache]: Analyzing trace with hash -341799338, now seen corresponding path program 1 times [2024-06-21 20:54:32,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:32,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440565664] [2024-06-21 20:54:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:32,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:32,900 INFO 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 20:54:32,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:32,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440565664] [2024-06-21 20:54:32,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440565664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:32,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:32,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:54:32,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138675941] [2024-06-21 20:54:32,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:32,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:54:32,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:32,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:54:32,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:54:32,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:32,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 131 transitions, 1335 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:32,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:32,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:32,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:33,533 INFO L124 PetriNetUnfolderBase]: 2206/3262 cut-off events. [2024-06-21 20:54:33,533 INFO L125 PetriNetUnfolderBase]: For 65551/65551 co-relation queries the response was YES. [2024-06-21 20:54:33,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19732 conditions, 3262 events. 2206/3262 cut-off events. For 65551/65551 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14831 event pairs, 674 based on Foata normal form. 3/3264 useless extension candidates. Maximal degree in co-relation 19681. Up to 3238 conditions per place. [2024-06-21 20:54:33,554 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 131 selfloop transitions, 11 changer transitions 0/145 dead transitions. [2024-06-21 20:54:33,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 145 transitions, 1671 flow [2024-06-21 20:54:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:54:33,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:54:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 20:54:33,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-21 20:54:33,573 INFO L175 Difference]: Start difference. First operand has 109 places, 131 transitions, 1335 flow. Second operand 6 states and 97 transitions. [2024-06-21 20:54:33,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 145 transitions, 1671 flow [2024-06-21 20:54:33,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 145 transitions, 1583 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 20:54:33,641 INFO L231 Difference]: Finished difference. Result has 110 places, 134 transitions, 1307 flow [2024-06-21 20:54:33,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1307, PETRI_PLACES=110, PETRI_TRANSITIONS=134} [2024-06-21 20:54:33,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-21 20:54:33,642 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 134 transitions, 1307 flow [2024-06-21 20:54:33,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:33,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:33,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:33,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:54:33,643 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:33,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:33,643 INFO L85 PathProgramCache]: Analyzing trace with hash 316114428, now seen corresponding path program 1 times [2024-06-21 20:54:33,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:33,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404624177] [2024-06-21 20:54:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:33,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:34,460 INFO 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 20:54:34,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:34,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404624177] [2024-06-21 20:54:34,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404624177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:34,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:34,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:54:34,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646099129] [2024-06-21 20:54:34,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:34,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:54:34,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:34,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:54:34,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:54:34,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:34,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 134 transitions, 1307 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:34,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:34,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:34,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:35,089 INFO L124 PetriNetUnfolderBase]: 2088/3153 cut-off events. [2024-06-21 20:54:35,089 INFO L125 PetriNetUnfolderBase]: For 68736/68787 co-relation queries the response was YES. [2024-06-21 20:54:35,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19410 conditions, 3153 events. 2088/3153 cut-off events. For 68736/68787 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14988 event pairs, 452 based on Foata normal form. 15/3148 useless extension candidates. Maximal degree in co-relation 19358. Up to 2758 conditions per place. [2024-06-21 20:54:35,110 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 32 changer transitions 0/171 dead transitions. [2024-06-21 20:54:35,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 171 transitions, 1865 flow [2024-06-21 20:54:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:54:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:54:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:54:35,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:54:35,119 INFO L175 Difference]: Start difference. First operand has 110 places, 134 transitions, 1307 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:54:35,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 171 transitions, 1865 flow [2024-06-21 20:54:35,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 171 transitions, 1827 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:54:35,159 INFO L231 Difference]: Finished difference. Result has 114 places, 138 transitions, 1440 flow [2024-06-21 20:54:35,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1440, PETRI_PLACES=114, PETRI_TRANSITIONS=138} [2024-06-21 20:54:35,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-21 20:54:35,160 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 138 transitions, 1440 flow [2024-06-21 20:54:35,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:35,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:35,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:35,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:54:35,160 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:35,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:35,161 INFO L85 PathProgramCache]: Analyzing trace with hash 316175002, now seen corresponding path program 1 times [2024-06-21 20:54:35,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:35,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776490701] [2024-06-21 20:54:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:35,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:35,876 INFO 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 20:54:35,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:35,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776490701] [2024-06-21 20:54:35,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776490701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:35,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:35,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:54:35,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762698467] [2024-06-21 20:54:35,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:35,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:54:35,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:35,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:54:35,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:54:35,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:35,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 138 transitions, 1440 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:35,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:35,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:35,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:36,499 INFO L124 PetriNetUnfolderBase]: 2283/3376 cut-off events. [2024-06-21 20:54:36,499 INFO L125 PetriNetUnfolderBase]: For 79253/79255 co-relation queries the response was YES. [2024-06-21 20:54:36,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21295 conditions, 3376 events. 2283/3376 cut-off events. For 79253/79255 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15668 event pairs, 521 based on Foata normal form. 6/3381 useless extension candidates. Maximal degree in co-relation 21242. Up to 2629 conditions per place. [2024-06-21 20:54:36,518 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 128 selfloop transitions, 65 changer transitions 0/196 dead transitions. [2024-06-21 20:54:36,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 196 transitions, 2450 flow [2024-06-21 20:54:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:54:36,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:54:36,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 20:54:36,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49390243902439024 [2024-06-21 20:54:36,519 INFO L175 Difference]: Start difference. First operand has 114 places, 138 transitions, 1440 flow. Second operand 8 states and 162 transitions. [2024-06-21 20:54:36,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 196 transitions, 2450 flow [2024-06-21 20:54:36,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 196 transitions, 2360 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 20:54:36,577 INFO L231 Difference]: Finished difference. Result has 121 places, 153 transitions, 1734 flow [2024-06-21 20:54:36,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1734, PETRI_PLACES=121, PETRI_TRANSITIONS=153} [2024-06-21 20:54:36,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-21 20:54:36,578 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 153 transitions, 1734 flow [2024-06-21 20:54:36,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:36,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:36,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:36,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:54:36,578 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:36,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:36,578 INFO L85 PathProgramCache]: Analyzing trace with hash 316174878, now seen corresponding path program 2 times [2024-06-21 20:54:36,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:36,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094466218] [2024-06-21 20:54:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:36,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:37,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:37,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094466218] [2024-06-21 20:54:37,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094466218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:37,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:37,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:54:37,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611084507] [2024-06-21 20:54:37,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:37,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:54:37,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:37,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:54:37,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:54:37,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:37,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 153 transitions, 1734 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:37,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:37,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:37,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:38,091 INFO L124 PetriNetUnfolderBase]: 2161/3247 cut-off events. [2024-06-21 20:54:38,092 INFO L125 PetriNetUnfolderBase]: For 85605/85657 co-relation queries the response was YES. [2024-06-21 20:54:38,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21856 conditions, 3247 events. 2161/3247 cut-off events. For 85605/85657 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15422 event pairs, 561 based on Foata normal form. 16/3243 useless extension candidates. Maximal degree in co-relation 21798. Up to 2917 conditions per place. [2024-06-21 20:54:38,116 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 131 selfloop transitions, 31 changer transitions 0/187 dead transitions. [2024-06-21 20:54:38,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 187 transitions, 2144 flow [2024-06-21 20:54:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:38,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 20:54:38,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 20:54:38,117 INFO L175 Difference]: Start difference. First operand has 121 places, 153 transitions, 1734 flow. Second operand 9 states and 166 transitions. [2024-06-21 20:54:38,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 187 transitions, 2144 flow [2024-06-21 20:54:38,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 187 transitions, 2021 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-21 20:54:38,183 INFO L231 Difference]: Finished difference. Result has 128 places, 153 transitions, 1681 flow [2024-06-21 20:54:38,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1681, PETRI_PLACES=128, PETRI_TRANSITIONS=153} [2024-06-21 20:54:38,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-21 20:54:38,184 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 153 transitions, 1681 flow [2024-06-21 20:54:38,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:38,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:38,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:38,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:54:38,185 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:38,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:38,185 INFO L85 PathProgramCache]: Analyzing trace with hash 318976162, now seen corresponding path program 2 times [2024-06-21 20:54:38,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:38,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632471892] [2024-06-21 20:54:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:38,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:38,935 INFO 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 20:54:38,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:38,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632471892] [2024-06-21 20:54:38,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632471892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:38,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:38,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:54:38,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754412707] [2024-06-21 20:54:38,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:38,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:54:38,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:38,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:54:38,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:54:39,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:39,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 153 transitions, 1681 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:39,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:39,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:39,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:39,600 INFO L124 PetriNetUnfolderBase]: 2311/3416 cut-off events. [2024-06-21 20:54:39,600 INFO L125 PetriNetUnfolderBase]: For 93923/93925 co-relation queries the response was YES. [2024-06-21 20:54:39,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23149 conditions, 3416 events. 2311/3416 cut-off events. For 93923/93925 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15825 event pairs, 548 based on Foata normal form. 6/3421 useless extension candidates. Maximal degree in co-relation 23089. Up to 2871 conditions per place. [2024-06-21 20:54:39,632 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 128 selfloop transitions, 62 changer transitions 0/193 dead transitions. [2024-06-21 20:54:39,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 193 transitions, 2450 flow [2024-06-21 20:54:39,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:54:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:54:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 20:54:39,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47865853658536583 [2024-06-21 20:54:39,633 INFO L175 Difference]: Start difference. First operand has 128 places, 153 transitions, 1681 flow. Second operand 8 states and 157 transitions. [2024-06-21 20:54:39,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 193 transitions, 2450 flow [2024-06-21 20:54:39,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 193 transitions, 2380 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:54:39,706 INFO L231 Difference]: Finished difference. Result has 128 places, 157 transitions, 1813 flow [2024-06-21 20:54:39,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1813, PETRI_PLACES=128, PETRI_TRANSITIONS=157} [2024-06-21 20:54:39,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-21 20:54:39,707 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 157 transitions, 1813 flow [2024-06-21 20:54:39,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:39,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:39,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:39,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:54:39,707 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:39,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:39,708 INFO L85 PathProgramCache]: Analyzing trace with hash 318971512, now seen corresponding path program 3 times [2024-06-21 20:54:39,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:39,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144045307] [2024-06-21 20:54:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:39,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:40,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:40,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144045307] [2024-06-21 20:54:40,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144045307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:40,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:40,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:54:40,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296325321] [2024-06-21 20:54:40,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:40,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:54:40,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:40,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:54:40,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:54:40,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:40,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 157 transitions, 1813 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:40,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:40,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:40,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:41,221 INFO L124 PetriNetUnfolderBase]: 2371/3501 cut-off events. [2024-06-21 20:54:41,221 INFO L125 PetriNetUnfolderBase]: For 103141/103143 co-relation queries the response was YES. [2024-06-21 20:54:41,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24431 conditions, 3501 events. 2371/3501 cut-off events. For 103141/103143 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16296 event pairs, 552 based on Foata normal form. 8/3508 useless extension candidates. Maximal degree in co-relation 24370. Up to 2955 conditions per place. [2024-06-21 20:54:41,249 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 138 selfloop transitions, 63 changer transitions 0/204 dead transitions. [2024-06-21 20:54:41,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 204 transitions, 2639 flow [2024-06-21 20:54:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 20:54:41,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-21 20:54:41,250 INFO L175 Difference]: Start difference. First operand has 128 places, 157 transitions, 1813 flow. Second operand 9 states and 174 transitions. [2024-06-21 20:54:41,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 204 transitions, 2639 flow [2024-06-21 20:54:41,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 204 transitions, 2476 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:41,321 INFO L231 Difference]: Finished difference. Result has 132 places, 165 transitions, 1931 flow [2024-06-21 20:54:41,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1931, PETRI_PLACES=132, PETRI_TRANSITIONS=165} [2024-06-21 20:54:41,322 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-21 20:54:41,322 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 165 transitions, 1931 flow [2024-06-21 20:54:41,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:41,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:41,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:41,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:54:41,323 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:41,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:41,323 INFO L85 PathProgramCache]: Analyzing trace with hash 434262682, now seen corresponding path program 4 times [2024-06-21 20:54:41,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:41,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152667358] [2024-06-21 20:54:41,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:41,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:42,177 INFO 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 20:54:42,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:42,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152667358] [2024-06-21 20:54:42,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152667358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:42,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:42,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:54:42,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72676041] [2024-06-21 20:54:42,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:42,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:54:42,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:42,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:54:42,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:54:42,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:42,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 165 transitions, 1931 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:42,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:42,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:42,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:42,917 INFO L124 PetriNetUnfolderBase]: 2431/3587 cut-off events. [2024-06-21 20:54:42,917 INFO L125 PetriNetUnfolderBase]: For 113170/113172 co-relation queries the response was YES. [2024-06-21 20:54:42,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25625 conditions, 3587 events. 2431/3587 cut-off events. For 113170/113172 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16783 event pairs, 524 based on Foata normal form. 8/3594 useless extension candidates. Maximal degree in co-relation 25562. Up to 2984 conditions per place. [2024-06-21 20:54:42,945 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 152 selfloop transitions, 65 changer transitions 0/220 dead transitions. [2024-06-21 20:54:42,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 220 transitions, 2919 flow [2024-06-21 20:54:42,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:42,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 20:54:42,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-21 20:54:42,946 INFO L175 Difference]: Start difference. First operand has 132 places, 165 transitions, 1931 flow. Second operand 9 states and 181 transitions. [2024-06-21 20:54:42,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 220 transitions, 2919 flow [2024-06-21 20:54:43,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 220 transitions, 2800 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 20:54:43,047 INFO L231 Difference]: Finished difference. Result has 137 places, 173 transitions, 2112 flow [2024-06-21 20:54:43,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2112, PETRI_PLACES=137, PETRI_TRANSITIONS=173} [2024-06-21 20:54:43,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-21 20:54:43,047 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 173 transitions, 2112 flow [2024-06-21 20:54:43,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:43,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:43,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:43,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:54:43,048 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:43,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:43,048 INFO L85 PathProgramCache]: Analyzing trace with hash -790828564, now seen corresponding path program 1 times [2024-06-21 20:54:43,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:43,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829606427] [2024-06-21 20:54:43,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:43,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:43,978 INFO 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 20:54:43,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:43,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829606427] [2024-06-21 20:54:43,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829606427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:43,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:43,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:43,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560347540] [2024-06-21 20:54:43,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:43,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:43,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:44,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:44,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 173 transitions, 2112 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:44,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:44,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:44,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:44,690 INFO L124 PetriNetUnfolderBase]: 2487/3675 cut-off events. [2024-06-21 20:54:44,691 INFO L125 PetriNetUnfolderBase]: For 126011/126013 co-relation queries the response was YES. [2024-06-21 20:54:44,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27013 conditions, 3675 events. 2487/3675 cut-off events. For 126011/126013 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17313 event pairs, 549 based on Foata normal form. 14/3688 useless extension candidates. Maximal degree in co-relation 26947. Up to 3174 conditions per place. [2024-06-21 20:54:44,766 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 154 selfloop transitions, 53 changer transitions 0/210 dead transitions. [2024-06-21 20:54:44,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 210 transitions, 2850 flow [2024-06-21 20:54:44,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:54:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:54:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:54:44,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-21 20:54:44,767 INFO L175 Difference]: Start difference. First operand has 137 places, 173 transitions, 2112 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:54:44,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 210 transitions, 2850 flow [2024-06-21 20:54:44,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 210 transitions, 2701 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 20:54:44,855 INFO L231 Difference]: Finished difference. Result has 140 places, 177 transitions, 2162 flow [2024-06-21 20:54:44,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1963, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2162, PETRI_PLACES=140, PETRI_TRANSITIONS=177} [2024-06-21 20:54:44,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-21 20:54:44,856 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 177 transitions, 2162 flow [2024-06-21 20:54:44,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:44,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:44,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:44,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:54:44,856 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:44,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash -790835508, now seen corresponding path program 5 times [2024-06-21 20:54:44,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:44,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687742719] [2024-06-21 20:54:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:44,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:45,730 INFO 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 20:54:45,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:45,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687742719] [2024-06-21 20:54:45,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687742719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:45,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:45,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:54:45,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552352128] [2024-06-21 20:54:45,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:45,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:54:45,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:45,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:54:45,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:54:45,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:45,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 177 transitions, 2162 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:45,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:45,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:45,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:46,441 INFO L124 PetriNetUnfolderBase]: 2523/3727 cut-off events. [2024-06-21 20:54:46,441 INFO L125 PetriNetUnfolderBase]: For 131962/131964 co-relation queries the response was YES. [2024-06-21 20:54:46,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28110 conditions, 3727 events. 2523/3727 cut-off events. For 131962/131964 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17578 event pairs, 523 based on Foata normal form. 8/3734 useless extension candidates. Maximal degree in co-relation 28042. Up to 3244 conditions per place. [2024-06-21 20:54:46,472 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 155 selfloop transitions, 55 changer transitions 0/213 dead transitions. [2024-06-21 20:54:46,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 213 transitions, 2864 flow [2024-06-21 20:54:46,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:54:46,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:54:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:54:46,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:54:46,473 INFO L175 Difference]: Start difference. First operand has 140 places, 177 transitions, 2162 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:54:46,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 213 transitions, 2864 flow [2024-06-21 20:54:46,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 213 transitions, 2695 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:46,579 INFO L231 Difference]: Finished difference. Result has 142 places, 181 transitions, 2204 flow [2024-06-21 20:54:46,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2204, PETRI_PLACES=142, PETRI_TRANSITIONS=181} [2024-06-21 20:54:46,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-21 20:54:46,580 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 181 transitions, 2204 flow [2024-06-21 20:54:46,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:46,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:46,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:46,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:54:46,581 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:46,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:46,581 INFO L85 PathProgramCache]: Analyzing trace with hash 904019071, now seen corresponding path program 1 times [2024-06-21 20:54:46,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:46,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057588850] [2024-06-21 20:54:46,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:46,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:47,081 INFO 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 20:54:47,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:47,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057588850] [2024-06-21 20:54:47,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057588850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:47,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:47,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:54:47,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514405409] [2024-06-21 20:54:47,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:47,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:54:47,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:47,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:54:47,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:54:47,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:47,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 181 transitions, 2204 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:47,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:47,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:47,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:47,672 INFO L124 PetriNetUnfolderBase]: 2528/3732 cut-off events. [2024-06-21 20:54:47,672 INFO L125 PetriNetUnfolderBase]: For 138247/138247 co-relation queries the response was YES. [2024-06-21 20:54:47,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28220 conditions, 3732 events. 2528/3732 cut-off events. For 138247/138247 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17552 event pairs, 637 based on Foata normal form. 1/3732 useless extension candidates. Maximal degree in co-relation 28151. Up to 3695 conditions per place. [2024-06-21 20:54:47,705 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 181 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2024-06-21 20:54:47,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 200 transitions, 2749 flow [2024-06-21 20:54:47,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:54:47,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:54:47,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 20:54:47,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 20:54:47,706 INFO L175 Difference]: Start difference. First operand has 142 places, 181 transitions, 2204 flow. Second operand 6 states and 104 transitions. [2024-06-21 20:54:47,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 200 transitions, 2749 flow [2024-06-21 20:54:47,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 200 transitions, 2584 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:47,808 INFO L231 Difference]: Finished difference. Result has 142 places, 184 transitions, 2130 flow [2024-06-21 20:54:47,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2130, PETRI_PLACES=142, PETRI_TRANSITIONS=184} [2024-06-21 20:54:47,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-21 20:54:47,808 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 184 transitions, 2130 flow [2024-06-21 20:54:47,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:47,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:47,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:47,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:54:47,809 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:47,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:47,809 INFO L85 PathProgramCache]: Analyzing trace with hash -49655982, now seen corresponding path program 2 times [2024-06-21 20:54:47,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:47,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218850903] [2024-06-21 20:54:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:47,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:48,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:48,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218850903] [2024-06-21 20:54:48,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218850903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:48,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:48,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:48,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351704936] [2024-06-21 20:54:48,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:48,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:48,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:48,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:48,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:48,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:48,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 184 transitions, 2130 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:48,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:48,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:48,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:49,425 INFO L124 PetriNetUnfolderBase]: 2556/3776 cut-off events. [2024-06-21 20:54:49,425 INFO L125 PetriNetUnfolderBase]: For 146310/146310 co-relation queries the response was YES. [2024-06-21 20:54:49,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28273 conditions, 3776 events. 2556/3776 cut-off events. For 146310/146310 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17839 event pairs, 624 based on Foata normal form. 6/3781 useless extension candidates. Maximal degree in co-relation 28203. Up to 3617 conditions per place. [2024-06-21 20:54:49,457 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 182 selfloop transitions, 30 changer transitions 0/215 dead transitions. [2024-06-21 20:54:49,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 215 transitions, 2822 flow [2024-06-21 20:54:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:54:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:54:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 20:54:49,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 20:54:49,458 INFO L175 Difference]: Start difference. First operand has 142 places, 184 transitions, 2130 flow. Second operand 8 states and 143 transitions. [2024-06-21 20:54:49,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 215 transitions, 2822 flow [2024-06-21 20:54:49,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 215 transitions, 2679 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:49,570 INFO L231 Difference]: Finished difference. Result has 144 places, 187 transitions, 2137 flow [2024-06-21 20:54:49,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2137, PETRI_PLACES=144, PETRI_TRANSITIONS=187} [2024-06-21 20:54:49,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-21 20:54:49,570 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 187 transitions, 2137 flow [2024-06-21 20:54:49,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:49,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:49,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:49,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:54:49,571 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:49,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:49,571 INFO L85 PathProgramCache]: Analyzing trace with hash 178245168, now seen corresponding path program 3 times [2024-06-21 20:54:49,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:49,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510489373] [2024-06-21 20:54:49,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:49,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:50,377 INFO 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 20:54:50,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:50,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510489373] [2024-06-21 20:54:50,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510489373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:50,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:50,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:50,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542588310] [2024-06-21 20:54:50,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:50,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:50,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:50,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:50,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:50,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:50,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 187 transitions, 2137 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:50,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:50,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:50,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:51,198 INFO L124 PetriNetUnfolderBase]: 2584/3820 cut-off events. [2024-06-21 20:54:51,199 INFO L125 PetriNetUnfolderBase]: For 155705/155705 co-relation queries the response was YES. [2024-06-21 20:54:51,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29040 conditions, 3820 events. 2584/3820 cut-off events. For 155705/155705 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18151 event pairs, 627 based on Foata normal form. 6/3825 useless extension candidates. Maximal degree in co-relation 28970. Up to 3721 conditions per place. [2024-06-21 20:54:51,227 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 189 selfloop transitions, 24 changer transitions 0/216 dead transitions. [2024-06-21 20:54:51,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 216 transitions, 2773 flow [2024-06-21 20:54:51,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:54:51,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:54:51,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:54:51,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 20:54:51,229 INFO L175 Difference]: Start difference. First operand has 144 places, 187 transitions, 2137 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:54:51,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 216 transitions, 2773 flow [2024-06-21 20:54:51,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 216 transitions, 2647 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:51,330 INFO L231 Difference]: Finished difference. Result has 146 places, 190 transitions, 2155 flow [2024-06-21 20:54:51,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2155, PETRI_PLACES=146, PETRI_TRANSITIONS=190} [2024-06-21 20:54:51,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-21 20:54:51,330 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 190 transitions, 2155 flow [2024-06-21 20:54:51,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:51,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:51,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:51,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:54:51,331 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:51,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:51,331 INFO L85 PathProgramCache]: Analyzing trace with hash 186519378, now seen corresponding path program 4 times [2024-06-21 20:54:51,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:51,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751655337] [2024-06-21 20:54:51,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:51,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:52,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:52,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751655337] [2024-06-21 20:54:52,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751655337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:52,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:52,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:52,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539588841] [2024-06-21 20:54:52,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:52,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:52,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:52,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:52,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:52,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:52,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 190 transitions, 2155 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:52,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:52,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:52,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:53,003 INFO L124 PetriNetUnfolderBase]: 2612/3864 cut-off events. [2024-06-21 20:54:53,004 INFO L125 PetriNetUnfolderBase]: For 165610/165610 co-relation queries the response was YES. [2024-06-21 20:54:53,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29655 conditions, 3864 events. 2612/3864 cut-off events. For 165610/165610 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 18373 event pairs, 629 based on Foata normal form. 6/3869 useless extension candidates. Maximal degree in co-relation 29584. Up to 3706 conditions per place. [2024-06-21 20:54:53,040 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 180 selfloop transitions, 36 changer transitions 0/219 dead transitions. [2024-06-21 20:54:53,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 219 transitions, 2805 flow [2024-06-21 20:54:53,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:54:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:54:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 20:54:53,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 20:54:53,041 INFO L175 Difference]: Start difference. First operand has 146 places, 190 transitions, 2155 flow. Second operand 8 states and 142 transitions. [2024-06-21 20:54:53,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 219 transitions, 2805 flow [2024-06-21 20:54:53,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 219 transitions, 2685 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:53,155 INFO L231 Difference]: Finished difference. Result has 148 places, 193 transitions, 2213 flow [2024-06-21 20:54:53,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2213, PETRI_PLACES=148, PETRI_TRANSITIONS=193} [2024-06-21 20:54:53,156 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-21 20:54:53,156 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 193 transitions, 2213 flow [2024-06-21 20:54:53,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:53,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:53,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:53,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:54:53,157 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:53,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:53,157 INFO L85 PathProgramCache]: Analyzing trace with hash 186519130, now seen corresponding path program 1 times [2024-06-21 20:54:53,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:53,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257825093] [2024-06-21 20:54:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:53,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:53,844 INFO 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 20:54:53,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:53,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257825093] [2024-06-21 20:54:53,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257825093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:53,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:53,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:54:53,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136498905] [2024-06-21 20:54:53,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:53,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:54:53,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:53,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:54:53,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:54:53,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:53,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 193 transitions, 2213 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:53,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:53,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:53,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:54,592 INFO L124 PetriNetUnfolderBase]: 2614/3868 cut-off events. [2024-06-21 20:54:54,592 INFO L125 PetriNetUnfolderBase]: For 171789/171795 co-relation queries the response was YES. [2024-06-21 20:54:54,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29952 conditions, 3868 events. 2614/3868 cut-off events. For 171789/171795 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 18432 event pairs, 627 based on Foata normal form. 9/3876 useless extension candidates. Maximal degree in co-relation 29880. Up to 3714 conditions per place. [2024-06-21 20:54:54,623 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 180 selfloop transitions, 36 changer transitions 0/219 dead transitions. [2024-06-21 20:54:54,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 219 transitions, 2851 flow [2024-06-21 20:54:54,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:54,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 20:54:54,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-21 20:54:54,624 INFO L175 Difference]: Start difference. First operand has 148 places, 193 transitions, 2213 flow. Second operand 7 states and 128 transitions. [2024-06-21 20:54:54,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 219 transitions, 2851 flow [2024-06-21 20:54:54,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 219 transitions, 2697 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:54,756 INFO L231 Difference]: Finished difference. Result has 149 places, 197 transitions, 2237 flow [2024-06-21 20:54:54,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2237, PETRI_PLACES=149, PETRI_TRANSITIONS=197} [2024-06-21 20:54:54,756 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-21 20:54:54,756 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 197 transitions, 2237 flow [2024-06-21 20:54:54,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:54,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:54,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:54,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:54:54,756 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:54,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:54,757 INFO L85 PathProgramCache]: Analyzing trace with hash -732370508, now seen corresponding path program 6 times [2024-06-21 20:54:54,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:54,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599615262] [2024-06-21 20:54:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:54,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:55,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:55,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599615262] [2024-06-21 20:54:55,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599615262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:55,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:55,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:54:55,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063788521] [2024-06-21 20:54:55,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:55,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:54:55,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:55,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:54:55,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:54:55,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:55,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 197 transitions, 2237 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:55,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:55,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:55,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:56,200 INFO L124 PetriNetUnfolderBase]: 2620/3877 cut-off events. [2024-06-21 20:54:56,200 INFO L125 PetriNetUnfolderBase]: For 168851/168857 co-relation queries the response was YES. [2024-06-21 20:54:56,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29458 conditions, 3877 events. 2620/3877 cut-off events. For 168851/168857 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 18455 event pairs, 624 based on Foata normal form. 15/3891 useless extension candidates. Maximal degree in co-relation 29385. Up to 3676 conditions per place. [2024-06-21 20:54:56,231 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 185 selfloop transitions, 43 changer transitions 0/231 dead transitions. [2024-06-21 20:54:56,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 231 transitions, 2972 flow [2024-06-21 20:54:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:54:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:54:56,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:54:56,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 20:54:56,232 INFO L175 Difference]: Start difference. First operand has 149 places, 197 transitions, 2237 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:54:56,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 231 transitions, 2972 flow [2024-06-21 20:54:56,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 231 transitions, 2856 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 20:54:56,367 INFO L231 Difference]: Finished difference. Result has 152 places, 204 transitions, 2375 flow [2024-06-21 20:54:56,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2375, PETRI_PLACES=152, PETRI_TRANSITIONS=204} [2024-06-21 20:54:56,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-21 20:54:56,367 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 204 transitions, 2375 flow [2024-06-21 20:54:56,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:56,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:56,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:56,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:54:56,368 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:56,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:56,368 INFO L85 PathProgramCache]: Analyzing trace with hash -723792684, now seen corresponding path program 5 times [2024-06-21 20:54:56,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:56,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261905493] [2024-06-21 20:54:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:56,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:57,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:57,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261905493] [2024-06-21 20:54:57,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261905493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:57,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:57,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:57,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473119461] [2024-06-21 20:54:57,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:57,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:57,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:57,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:57,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:57,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:57,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 204 transitions, 2375 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:57,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:57,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:57,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:57,874 INFO L124 PetriNetUnfolderBase]: 2623/3881 cut-off events. [2024-06-21 20:54:57,875 INFO L125 PetriNetUnfolderBase]: For 174432/174432 co-relation queries the response was YES. [2024-06-21 20:54:57,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29751 conditions, 3881 events. 2623/3881 cut-off events. For 174432/174432 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18482 event pairs, 608 based on Foata normal form. 6/3886 useless extension candidates. Maximal degree in co-relation 29677. Up to 3754 conditions per place. [2024-06-21 20:54:57,906 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 202 selfloop transitions, 28 changer transitions 0/233 dead transitions. [2024-06-21 20:54:57,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 233 transitions, 3059 flow [2024-06-21 20:54:57,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:54:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:54:57,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 20:54:57,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 20:54:57,907 INFO L175 Difference]: Start difference. First operand has 152 places, 204 transitions, 2375 flow. Second operand 8 states and 141 transitions. [2024-06-21 20:54:57,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 233 transitions, 3059 flow [2024-06-21 20:54:58,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 233 transitions, 2888 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:58,038 INFO L231 Difference]: Finished difference. Result has 154 places, 207 transitions, 2366 flow [2024-06-21 20:54:58,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2366, PETRI_PLACES=154, PETRI_TRANSITIONS=207} [2024-06-21 20:54:58,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-21 20:54:58,039 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 207 transitions, 2366 flow [2024-06-21 20:54:58,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:58,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:58,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:58,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:54:58,039 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:58,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:58,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2005857375, now seen corresponding path program 2 times [2024-06-21 20:54:58,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:58,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127806052] [2024-06-21 20:54:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:58,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:58,497 INFO 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 20:54:58,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:58,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127806052] [2024-06-21 20:54:58,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127806052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:58,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:58,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:54:58,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799808591] [2024-06-21 20:54:58,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:58,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:54:58,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:58,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:54:58,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:54:58,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:58,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 207 transitions, 2366 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:58,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:58,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:58,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:59,183 INFO L124 PetriNetUnfolderBase]: 2620/3877 cut-off events. [2024-06-21 20:54:59,183 INFO L125 PetriNetUnfolderBase]: For 179000/179000 co-relation queries the response was YES. [2024-06-21 20:54:59,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29749 conditions, 3877 events. 2620/3877 cut-off events. For 179000/179000 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18447 event pairs, 636 based on Foata normal form. 1/3877 useless extension candidates. Maximal degree in co-relation 29674. Up to 3859 conditions per place. [2024-06-21 20:54:59,219 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 202 selfloop transitions, 11 changer transitions 0/216 dead transitions. [2024-06-21 20:54:59,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 216 transitions, 2814 flow [2024-06-21 20:54:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:54:59,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:54:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 20:54:59,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-21 20:54:59,220 INFO L175 Difference]: Start difference. First operand has 154 places, 207 transitions, 2366 flow. Second operand 6 states and 95 transitions. [2024-06-21 20:54:59,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 216 transitions, 2814 flow [2024-06-21 20:54:59,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 216 transitions, 2664 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:59,361 INFO L231 Difference]: Finished difference. Result has 154 places, 207 transitions, 2244 flow [2024-06-21 20:54:59,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2216, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2244, PETRI_PLACES=154, PETRI_TRANSITIONS=207} [2024-06-21 20:54:59,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-21 20:54:59,362 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 207 transitions, 2244 flow [2024-06-21 20:54:59,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:59,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:59,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:59,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:54:59,362 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:59,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:59,363 INFO L85 PathProgramCache]: Analyzing trace with hash 909738943, now seen corresponding path program 1 times [2024-06-21 20:54:59,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:59,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096775138] [2024-06-21 20:54:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:59,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:59,819 INFO 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 20:54:59,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:59,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096775138] [2024-06-21 20:54:59,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096775138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:59,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:59,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:54:59,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300819707] [2024-06-21 20:54:59,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:59,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:54:59,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:59,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:54:59,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:54:59,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:54:59,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 207 transitions, 2244 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:59,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:59,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:54:59,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:00,542 INFO L124 PetriNetUnfolderBase]: 2619/3876 cut-off events. [2024-06-21 20:55:00,543 INFO L125 PetriNetUnfolderBase]: For 183387/183387 co-relation queries the response was YES. [2024-06-21 20:55:00,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29525 conditions, 3876 events. 2619/3876 cut-off events. For 183387/183387 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18419 event pairs, 634 based on Foata normal form. 3/3878 useless extension candidates. Maximal degree in co-relation 29449. Up to 3809 conditions per place. [2024-06-21 20:55:00,575 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 24 changer transitions 0/223 dead transitions. [2024-06-21 20:55:00,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 223 transitions, 2833 flow [2024-06-21 20:55:00,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:55:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:55:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 20:55:00,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 20:55:00,576 INFO L175 Difference]: Start difference. First operand has 154 places, 207 transitions, 2244 flow. Second operand 6 states and 105 transitions. [2024-06-21 20:55:00,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 223 transitions, 2833 flow [2024-06-21 20:55:00,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 223 transitions, 2801 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 20:55:00,699 INFO L231 Difference]: Finished difference. Result has 155 places, 210 transitions, 2318 flow [2024-06-21 20:55:00,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2318, PETRI_PLACES=155, PETRI_TRANSITIONS=210} [2024-06-21 20:55:00,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-21 20:55:00,700 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 210 transitions, 2318 flow [2024-06-21 20:55:00,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:00,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:00,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:00,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:55:00,700 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:00,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:00,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2005851423, now seen corresponding path program 2 times [2024-06-21 20:55:00,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:00,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444626341] [2024-06-21 20:55:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:00,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:01,170 INFO 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 20:55:01,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:01,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444626341] [2024-06-21 20:55:01,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444626341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:01,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:01,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:55:01,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368554185] [2024-06-21 20:55:01,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:01,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:55:01,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:01,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:55:01,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:55:01,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:01,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 210 transitions, 2318 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:01,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:01,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:01,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:01,878 INFO L124 PetriNetUnfolderBase]: 2582/3821 cut-off events. [2024-06-21 20:55:01,878 INFO L125 PetriNetUnfolderBase]: For 189905/189907 co-relation queries the response was YES. [2024-06-21 20:55:01,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29418 conditions, 3821 events. 2582/3821 cut-off events. For 189905/189907 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18094 event pairs, 644 based on Foata normal form. 1/3821 useless extension candidates. Maximal degree in co-relation 29341. Up to 3755 conditions per place. [2024-06-21 20:55:01,911 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 191 selfloop transitions, 25 changer transitions 0/219 dead transitions. [2024-06-21 20:55:01,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 219 transitions, 2772 flow [2024-06-21 20:55:01,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:55:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:55:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 20:55:01,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 20:55:01,912 INFO L175 Difference]: Start difference. First operand has 155 places, 210 transitions, 2318 flow. Second operand 6 states and 102 transitions. [2024-06-21 20:55:01,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 219 transitions, 2772 flow [2024-06-21 20:55:02,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 219 transitions, 2712 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:55:02,057 INFO L231 Difference]: Finished difference. Result has 157 places, 210 transitions, 2314 flow [2024-06-21 20:55:02,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2314, PETRI_PLACES=157, PETRI_TRANSITIONS=210} [2024-06-21 20:55:02,057 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-21 20:55:02,057 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 210 transitions, 2314 flow [2024-06-21 20:55:02,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:02,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:02,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:02,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:55:02,058 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:02,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:02,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1209614158, now seen corresponding path program 1 times [2024-06-21 20:55:02,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:02,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573997477] [2024-06-21 20:55:02,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:02,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:02,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:02,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573997477] [2024-06-21 20:55:02,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573997477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:02,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:02,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:02,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574862381] [2024-06-21 20:55:02,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:02,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:02,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:02,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:02,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:02,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:02,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 210 transitions, 2314 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:02,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:02,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:02,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:03,732 INFO L124 PetriNetUnfolderBase]: 2920/4359 cut-off events. [2024-06-21 20:55:03,732 INFO L125 PetriNetUnfolderBase]: For 248049/248051 co-relation queries the response was YES. [2024-06-21 20:55:03,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34795 conditions, 4359 events. 2920/4359 cut-off events. For 248049/248051 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21687 event pairs, 438 based on Foata normal form. 26/4384 useless extension candidates. Maximal degree in co-relation 34717. Up to 2532 conditions per place. [2024-06-21 20:55:03,773 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 188 selfloop transitions, 83 changer transitions 0/274 dead transitions. [2024-06-21 20:55:03,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 274 transitions, 3664 flow [2024-06-21 20:55:03,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:03,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:03,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 20:55:03,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013550135501355 [2024-06-21 20:55:03,774 INFO L175 Difference]: Start difference. First operand has 157 places, 210 transitions, 2314 flow. Second operand 9 states and 185 transitions. [2024-06-21 20:55:03,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 274 transitions, 3664 flow [2024-06-21 20:55:03,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 274 transitions, 3592 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:55:03,998 INFO L231 Difference]: Finished difference. Result has 162 places, 216 transitions, 2626 flow [2024-06-21 20:55:03,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2626, PETRI_PLACES=162, PETRI_TRANSITIONS=216} [2024-06-21 20:55:03,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-21 20:55:03,998 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 216 transitions, 2626 flow [2024-06-21 20:55:03,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:03,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:03,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:03,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:55:03,999 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:03,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:03,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1882643352, now seen corresponding path program 2 times [2024-06-21 20:55:03,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:03,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775704915] [2024-06-21 20:55:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:04,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:04,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:04,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775704915] [2024-06-21 20:55:04,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775704915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:04,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:04,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:04,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951886762] [2024-06-21 20:55:04,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:04,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:04,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:04,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:04,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:04,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:04,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 216 transitions, 2626 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:04,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:04,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:04,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:05,885 INFO L124 PetriNetUnfolderBase]: 3225/4846 cut-off events. [2024-06-21 20:55:05,885 INFO L125 PetriNetUnfolderBase]: For 296947/296949 co-relation queries the response was YES. [2024-06-21 20:55:05,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41010 conditions, 4846 events. 3225/4846 cut-off events. For 296947/296949 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25060 event pairs, 763 based on Foata normal form. 26/4871 useless extension candidates. Maximal degree in co-relation 40930. Up to 3456 conditions per place. [2024-06-21 20:55:05,946 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 187 selfloop transitions, 90 changer transitions 0/280 dead transitions. [2024-06-21 20:55:05,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 280 transitions, 4026 flow [2024-06-21 20:55:05,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:55:05,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:55:05,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-21 20:55:05,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951219512195122 [2024-06-21 20:55:05,949 INFO L175 Difference]: Start difference. First operand has 162 places, 216 transitions, 2626 flow. Second operand 10 states and 203 transitions. [2024-06-21 20:55:05,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 280 transitions, 4026 flow [2024-06-21 20:55:06,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 280 transitions, 3855 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 20:55:06,256 INFO L231 Difference]: Finished difference. Result has 169 places, 221 transitions, 2824 flow [2024-06-21 20:55:06,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2824, PETRI_PLACES=169, PETRI_TRANSITIONS=221} [2024-06-21 20:55:06,257 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-21 20:55:06,257 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 221 transitions, 2824 flow [2024-06-21 20:55:06,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:06,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:06,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:06,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:55:06,257 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:06,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:06,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1882647072, now seen corresponding path program 3 times [2024-06-21 20:55:06,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:06,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768902225] [2024-06-21 20:55:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:06,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:07,143 INFO 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 20:55:07,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:07,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768902225] [2024-06-21 20:55:07,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768902225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:07,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:07,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:07,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31398256] [2024-06-21 20:55:07,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:07,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:07,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:07,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:07,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:07,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:07,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 221 transitions, 2824 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:07,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:07,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:07,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:08,208 INFO L124 PetriNetUnfolderBase]: 3238/4869 cut-off events. [2024-06-21 20:55:08,208 INFO L125 PetriNetUnfolderBase]: For 309703/309705 co-relation queries the response was YES. [2024-06-21 20:55:08,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41273 conditions, 4869 events. 3238/4869 cut-off events. For 309703/309705 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25219 event pairs, 761 based on Foata normal form. 32/4900 useless extension candidates. Maximal degree in co-relation 41190. Up to 3809 conditions per place. [2024-06-21 20:55:08,250 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 180 selfloop transitions, 97 changer transitions 0/280 dead transitions. [2024-06-21 20:55:08,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 280 transitions, 3950 flow [2024-06-21 20:55:08,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:55:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:55:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-21 20:55:08,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811529933481153 [2024-06-21 20:55:08,252 INFO L175 Difference]: Start difference. First operand has 169 places, 221 transitions, 2824 flow. Second operand 11 states and 217 transitions. [2024-06-21 20:55:08,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 280 transitions, 3950 flow [2024-06-21 20:55:08,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 280 transitions, 3759 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 20:55:08,526 INFO L231 Difference]: Finished difference. Result has 174 places, 223 transitions, 2933 flow [2024-06-21 20:55:08,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2933, PETRI_PLACES=174, PETRI_TRANSITIONS=223} [2024-06-21 20:55:08,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-21 20:55:08,527 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 223 transitions, 2933 flow [2024-06-21 20:55:08,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:08,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:08,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:08,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:55:08,528 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:08,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:08,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2040477405, now seen corresponding path program 1 times [2024-06-21 20:55:08,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:08,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720872150] [2024-06-21 20:55:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:08,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:09,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:09,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720872150] [2024-06-21 20:55:09,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720872150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:09,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:09,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:09,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135273731] [2024-06-21 20:55:09,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:09,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:09,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:09,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:09,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:09,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:09,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 223 transitions, 2933 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:09,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:09,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:09,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:09,915 INFO L124 PetriNetUnfolderBase]: 3258/4897 cut-off events. [2024-06-21 20:55:09,915 INFO L125 PetriNetUnfolderBase]: For 290345/290347 co-relation queries the response was YES. [2024-06-21 20:55:09,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42015 conditions, 4897 events. 3258/4897 cut-off events. For 290345/290347 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25311 event pairs, 823 based on Foata normal form. 6/4902 useless extension candidates. Maximal degree in co-relation 41930. Up to 4441 conditions per place. [2024-06-21 20:55:09,963 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 189 selfloop transitions, 63 changer transitions 0/255 dead transitions. [2024-06-21 20:55:09,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 255 transitions, 3766 flow [2024-06-21 20:55:09,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:55:09,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-21 20:55:09,964 INFO L175 Difference]: Start difference. First operand has 174 places, 223 transitions, 2933 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:55:09,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 255 transitions, 3766 flow [2024-06-21 20:55:10,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 255 transitions, 3518 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 20:55:10,291 INFO L231 Difference]: Finished difference. Result has 172 places, 228 transitions, 2917 flow [2024-06-21 20:55:10,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2917, PETRI_PLACES=172, PETRI_TRANSITIONS=228} [2024-06-21 20:55:10,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-21 20:55:10,292 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 228 transitions, 2917 flow [2024-06-21 20:55:10,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:10,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:10,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:10,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:55:10,292 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:10,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:10,293 INFO L85 PathProgramCache]: Analyzing trace with hash 199448532, now seen corresponding path program 4 times [2024-06-21 20:55:10,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:10,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105206372] [2024-06-21 20:55:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:10,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:11,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:11,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105206372] [2024-06-21 20:55:11,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105206372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:11,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:11,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:11,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312671051] [2024-06-21 20:55:11,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:11,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:11,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:11,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:11,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:11,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:11,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 228 transitions, 2917 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:11,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:11,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:11,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:12,215 INFO L124 PetriNetUnfolderBase]: 3486/5269 cut-off events. [2024-06-21 20:55:12,215 INFO L125 PetriNetUnfolderBase]: For 342902/342904 co-relation queries the response was YES. [2024-06-21 20:55:12,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45168 conditions, 5269 events. 3486/5269 cut-off events. For 342902/342904 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 27967 event pairs, 720 based on Foata normal form. 26/5294 useless extension candidates. Maximal degree in co-relation 45082. Up to 4009 conditions per place. [2024-06-21 20:55:12,267 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 205 selfloop transitions, 80 changer transitions 0/288 dead transitions. [2024-06-21 20:55:12,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 288 transitions, 4267 flow [2024-06-21 20:55:12,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 20:55:12,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-21 20:55:12,268 INFO L175 Difference]: Start difference. First operand has 172 places, 228 transitions, 2917 flow. Second operand 9 states and 187 transitions. [2024-06-21 20:55:12,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 288 transitions, 4267 flow [2024-06-21 20:55:12,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 288 transitions, 4154 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 20:55:12,603 INFO L231 Difference]: Finished difference. Result has 178 places, 232 transitions, 3138 flow [2024-06-21 20:55:12,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2804, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3138, PETRI_PLACES=178, PETRI_TRANSITIONS=232} [2024-06-21 20:55:12,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-21 20:55:12,603 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 232 transitions, 3138 flow [2024-06-21 20:55:12,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:12,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:12,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:12,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:55:12,604 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:12,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:12,604 INFO L85 PathProgramCache]: Analyzing trace with hash 577242612, now seen corresponding path program 5 times [2024-06-21 20:55:12,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:12,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506616857] [2024-06-21 20:55:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:12,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:13,495 INFO 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 20:55:13,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:13,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506616857] [2024-06-21 20:55:13,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506616857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:13,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:13,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:13,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248788806] [2024-06-21 20:55:13,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:13,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:13,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:13,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:13,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:13,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:13,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 232 transitions, 3138 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:13,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:13,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:13,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:14,664 INFO L124 PetriNetUnfolderBase]: 3638/5517 cut-off events. [2024-06-21 20:55:14,664 INFO L125 PetriNetUnfolderBase]: For 385978/385980 co-relation queries the response was YES. [2024-06-21 20:55:14,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48084 conditions, 5517 events. 3638/5517 cut-off events. For 385978/385980 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 29738 event pairs, 915 based on Foata normal form. 38/5554 useless extension candidates. Maximal degree in co-relation 47996. Up to 4663 conditions per place. [2024-06-21 20:55:14,722 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 204 selfloop transitions, 82 changer transitions 0/289 dead transitions. [2024-06-21 20:55:14,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 289 transitions, 4228 flow [2024-06-21 20:55:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:55:14,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:55:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 20:55:14,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853658536585366 [2024-06-21 20:55:14,726 INFO L175 Difference]: Start difference. First operand has 178 places, 232 transitions, 3138 flow. Second operand 10 states and 199 transitions. [2024-06-21 20:55:14,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 289 transitions, 4228 flow [2024-06-21 20:55:15,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 289 transitions, 4039 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-21 20:55:15,150 INFO L231 Difference]: Finished difference. Result has 183 places, 234 transitions, 3218 flow [2024-06-21 20:55:15,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2951, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3218, PETRI_PLACES=183, PETRI_TRANSITIONS=234} [2024-06-21 20:55:15,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-21 20:55:15,150 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 234 transitions, 3218 flow [2024-06-21 20:55:15,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:15,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:15,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:15,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:55:15,151 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:15,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:15,151 INFO L85 PathProgramCache]: Analyzing trace with hash 582956904, now seen corresponding path program 1 times [2024-06-21 20:55:15,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:15,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234761848] [2024-06-21 20:55:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:15,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:16,029 INFO 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 20:55:16,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:16,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234761848] [2024-06-21 20:55:16,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234761848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:16,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:16,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:16,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738356444] [2024-06-21 20:55:16,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:16,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:16,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:16,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:16,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:16,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:16,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 234 transitions, 3218 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:16,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:16,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:16,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:17,108 INFO L124 PetriNetUnfolderBase]: 3666/5561 cut-off events. [2024-06-21 20:55:17,109 INFO L125 PetriNetUnfolderBase]: For 373813/373815 co-relation queries the response was YES. [2024-06-21 20:55:17,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48666 conditions, 5561 events. 3666/5561 cut-off events. For 373813/373815 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30045 event pairs, 940 based on Foata normal form. 8/5568 useless extension candidates. Maximal degree in co-relation 48576. Up to 5079 conditions per place. [2024-06-21 20:55:17,164 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 204 selfloop transitions, 61 changer transitions 0/268 dead transitions. [2024-06-21 20:55:17,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 268 transitions, 4022 flow [2024-06-21 20:55:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:55:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:55:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:55:17,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 20:55:17,165 INFO L175 Difference]: Start difference. First operand has 183 places, 234 transitions, 3218 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:55:17,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 268 transitions, 4022 flow [2024-06-21 20:55:17,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 268 transitions, 3803 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 20:55:17,574 INFO L231 Difference]: Finished difference. Result has 183 places, 237 transitions, 3239 flow [2024-06-21 20:55:17,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2999, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3239, PETRI_PLACES=183, PETRI_TRANSITIONS=237} [2024-06-21 20:55:17,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-21 20:55:17,574 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 237 transitions, 3239 flow [2024-06-21 20:55:17,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:17,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:17,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:17,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:55:17,575 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:17,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:17,575 INFO L85 PathProgramCache]: Analyzing trace with hash 582964344, now seen corresponding path program 2 times [2024-06-21 20:55:17,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:17,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900752252] [2024-06-21 20:55:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:17,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:18,427 INFO 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 20:55:18,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:18,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900752252] [2024-06-21 20:55:18,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900752252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:18,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:18,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:18,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61816574] [2024-06-21 20:55:18,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:18,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:18,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:18,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:18,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:18,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:18,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 237 transitions, 3239 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:18,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:18,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:18,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:19,563 INFO L124 PetriNetUnfolderBase]: 3694/5605 cut-off events. [2024-06-21 20:55:19,563 INFO L125 PetriNetUnfolderBase]: For 384129/384131 co-relation queries the response was YES. [2024-06-21 20:55:19,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48775 conditions, 5605 events. 3694/5605 cut-off events. For 384129/384131 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 30388 event pairs, 921 based on Foata normal form. 8/5612 useless extension candidates. Maximal degree in co-relation 48684. Up to 4969 conditions per place. [2024-06-21 20:55:19,609 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 199 selfloop transitions, 72 changer transitions 0/274 dead transitions. [2024-06-21 20:55:19,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 274 transitions, 4104 flow [2024-06-21 20:55:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:55:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:55:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:55:19,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 20:55:19,610 INFO L175 Difference]: Start difference. First operand has 183 places, 237 transitions, 3239 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:55:19,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 274 transitions, 4104 flow [2024-06-21 20:55:19,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 274 transitions, 3894 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 20:55:19,939 INFO L231 Difference]: Finished difference. Result has 186 places, 243 transitions, 3362 flow [2024-06-21 20:55:19,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3362, PETRI_PLACES=186, PETRI_TRANSITIONS=243} [2024-06-21 20:55:19,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-21 20:55:19,939 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 243 transitions, 3362 flow [2024-06-21 20:55:19,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:19,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:19,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:19,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:55:19,940 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:19,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash 582749142, now seen corresponding path program 6 times [2024-06-21 20:55:19,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:19,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071768263] [2024-06-21 20:55:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:19,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:20,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:20,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071768263] [2024-06-21 20:55:20,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071768263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:20,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:20,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:20,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047624415] [2024-06-21 20:55:20,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:20,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:20,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:20,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:20,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:20,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:20,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 243 transitions, 3362 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:20,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:20,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:20,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:22,175 INFO L124 PetriNetUnfolderBase]: 3818/5809 cut-off events. [2024-06-21 20:55:22,175 INFO L125 PetriNetUnfolderBase]: For 435377/435379 co-relation queries the response was YES. [2024-06-21 20:55:22,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51128 conditions, 5809 events. 3818/5809 cut-off events. For 435377/435379 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 31837 event pairs, 926 based on Foata normal form. 32/5840 useless extension candidates. Maximal degree in co-relation 51035. Up to 5099 conditions per place. [2024-06-21 20:55:22,255 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 216 selfloop transitions, 66 changer transitions 0/285 dead transitions. [2024-06-21 20:55:22,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 285 transitions, 4238 flow [2024-06-21 20:55:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:55:22,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:55:22,256 INFO L175 Difference]: Start difference. First operand has 186 places, 243 transitions, 3362 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:55:22,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 285 transitions, 4238 flow [2024-06-21 20:55:22,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 285 transitions, 4044 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-21 20:55:22,779 INFO L231 Difference]: Finished difference. Result has 191 places, 245 transitions, 3415 flow [2024-06-21 20:55:22,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3168, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3415, PETRI_PLACES=191, PETRI_TRANSITIONS=245} [2024-06-21 20:55:22,779 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-21 20:55:22,780 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 245 transitions, 3415 flow [2024-06-21 20:55:22,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:22,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:22,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:22,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:55:22,780 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:22,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:22,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2040178875, now seen corresponding path program 2 times [2024-06-21 20:55:22,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:22,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711635000] [2024-06-21 20:55:22,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:22,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:23,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:23,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711635000] [2024-06-21 20:55:23,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711635000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:23,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:23,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:23,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310381661] [2024-06-21 20:55:23,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:23,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:23,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:23,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:23,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:23,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:23,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 245 transitions, 3415 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:23,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:23,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:23,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:24,330 INFO L124 PetriNetUnfolderBase]: 3884/5901 cut-off events. [2024-06-21 20:55:24,330 INFO L125 PetriNetUnfolderBase]: For 433358/433360 co-relation queries the response was YES. [2024-06-21 20:55:24,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52915 conditions, 5901 events. 3884/5901 cut-off events. For 433358/433360 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32369 event pairs, 965 based on Foata normal form. 6/5906 useless extension candidates. Maximal degree in co-relation 52820. Up to 5399 conditions per place. [2024-06-21 20:55:24,394 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 206 selfloop transitions, 70 changer transitions 0/279 dead transitions. [2024-06-21 20:55:24,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 279 transitions, 4460 flow [2024-06-21 20:55:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 20:55:24,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-21 20:55:24,395 INFO L175 Difference]: Start difference. First operand has 191 places, 245 transitions, 3415 flow. Second operand 7 states and 130 transitions. [2024-06-21 20:55:24,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 279 transitions, 4460 flow [2024-06-21 20:55:24,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 279 transitions, 4241 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 20:55:24,911 INFO L231 Difference]: Finished difference. Result has 192 places, 258 transitions, 3633 flow [2024-06-21 20:55:24,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3633, PETRI_PLACES=192, PETRI_TRANSITIONS=258} [2024-06-21 20:55:24,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-21 20:55:24,912 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 258 transitions, 3633 flow [2024-06-21 20:55:24,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:24,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:24,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:24,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:55:24,912 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:24,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:24,913 INFO L85 PathProgramCache]: Analyzing trace with hash -190001003, now seen corresponding path program 1 times [2024-06-21 20:55:24,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:24,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899698758] [2024-06-21 20:55:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:24,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:25,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:25,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899698758] [2024-06-21 20:55:25,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899698758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:25,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:25,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:25,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467900621] [2024-06-21 20:55:25,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:25,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:25,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:25,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:25,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:25,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:25,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 258 transitions, 3633 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:25,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:25,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:25,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:26,482 INFO L124 PetriNetUnfolderBase]: 3915/5942 cut-off events. [2024-06-21 20:55:26,482 INFO L125 PetriNetUnfolderBase]: For 435948/435948 co-relation queries the response was YES. [2024-06-21 20:55:26,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52927 conditions, 5942 events. 3915/5942 cut-off events. For 435948/435948 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32551 event pairs, 1062 based on Foata normal form. 3/5944 useless extension candidates. Maximal degree in co-relation 52830. Up to 5878 conditions per place. [2024-06-21 20:55:26,543 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 262 selfloop transitions, 23 changer transitions 0/288 dead transitions. [2024-06-21 20:55:26,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 288 transitions, 4459 flow [2024-06-21 20:55:26,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:26,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:26,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 20:55:26,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 20:55:26,544 INFO L175 Difference]: Start difference. First operand has 192 places, 258 transitions, 3633 flow. Second operand 7 states and 122 transitions. [2024-06-21 20:55:26,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 288 transitions, 4459 flow [2024-06-21 20:55:27,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 288 transitions, 4361 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 20:55:27,083 INFO L231 Difference]: Finished difference. Result has 197 places, 267 transitions, 3717 flow [2024-06-21 20:55:27,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3535, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3717, PETRI_PLACES=197, PETRI_TRANSITIONS=267} [2024-06-21 20:55:27,083 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-21 20:55:27,083 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 267 transitions, 3717 flow [2024-06-21 20:55:27,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:27,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:27,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:27,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:55:27,084 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:27,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:27,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2007069880, now seen corresponding path program 3 times [2024-06-21 20:55:27,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:27,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995511247] [2024-06-21 20:55:27,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:27,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:27,917 INFO 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 20:55:27,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:27,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995511247] [2024-06-21 20:55:27,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995511247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:27,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:27,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:27,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839822971] [2024-06-21 20:55:27,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:27,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:27,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:27,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:27,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:27,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:27,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 267 transitions, 3717 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:27,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:27,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:27,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:29,080 INFO L124 PetriNetUnfolderBase]: 3915/5943 cut-off events. [2024-06-21 20:55:29,080 INFO L125 PetriNetUnfolderBase]: For 450869/450875 co-relation queries the response was YES. [2024-06-21 20:55:29,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53144 conditions, 5943 events. 3915/5943 cut-off events. For 450869/450875 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32556 event pairs, 1052 based on Foata normal form. 12/5954 useless extension candidates. Maximal degree in co-relation 53045. Up to 5816 conditions per place. [2024-06-21 20:55:29,144 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 264 selfloop transitions, 29 changer transitions 0/296 dead transitions. [2024-06-21 20:55:29,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 296 transitions, 4489 flow [2024-06-21 20:55:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:55:29,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:55:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 20:55:29,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 20:55:29,145 INFO L175 Difference]: Start difference. First operand has 197 places, 267 transitions, 3717 flow. Second operand 8 states and 141 transitions. [2024-06-21 20:55:29,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 296 transitions, 4489 flow [2024-06-21 20:55:29,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 296 transitions, 4419 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 20:55:29,591 INFO L231 Difference]: Finished difference. Result has 202 places, 270 transitions, 3837 flow [2024-06-21 20:55:29,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3647, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3837, PETRI_PLACES=202, PETRI_TRANSITIONS=270} [2024-06-21 20:55:29,592 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-21 20:55:29,592 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 270 transitions, 3837 flow [2024-06-21 20:55:29,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:29,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:29,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:29,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:55:29,592 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:29,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:29,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1228432708, now seen corresponding path program 4 times [2024-06-21 20:55:29,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:29,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702324144] [2024-06-21 20:55:29,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:29,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:30,414 INFO 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 20:55:30,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:30,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702324144] [2024-06-21 20:55:30,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702324144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:30,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:30,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:30,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250347049] [2024-06-21 20:55:30,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:30,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:30,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:30,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:30,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:30,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:30,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 270 transitions, 3837 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:30,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:30,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:30,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:31,539 INFO L124 PetriNetUnfolderBase]: 3915/5943 cut-off events. [2024-06-21 20:55:31,539 INFO L125 PetriNetUnfolderBase]: For 464602/464608 co-relation queries the response was YES. [2024-06-21 20:55:31,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53433 conditions, 5943 events. 3915/5943 cut-off events. For 464602/464608 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32576 event pairs, 1052 based on Foata normal form. 12/5954 useless extension candidates. Maximal degree in co-relation 53332. Up to 5761 conditions per place. [2024-06-21 20:55:31,607 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 262 selfloop transitions, 34 changer transitions 0/299 dead transitions. [2024-06-21 20:55:31,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 299 transitions, 4614 flow [2024-06-21 20:55:31,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:55:31,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:55:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 20:55:31,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 20:55:31,608 INFO L175 Difference]: Start difference. First operand has 202 places, 270 transitions, 3837 flow. Second operand 8 states and 142 transitions. [2024-06-21 20:55:31,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 299 transitions, 4614 flow [2024-06-21 20:55:32,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 299 transitions, 4454 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 20:55:32,198 INFO L231 Difference]: Finished difference. Result has 204 places, 273 transitions, 3878 flow [2024-06-21 20:55:32,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3677, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3878, PETRI_PLACES=204, PETRI_TRANSITIONS=273} [2024-06-21 20:55:32,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-21 20:55:32,199 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 273 transitions, 3878 flow [2024-06-21 20:55:32,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:32,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:32,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:32,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:55:32,200 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:32,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash -971932198, now seen corresponding path program 5 times [2024-06-21 20:55:32,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:32,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072740168] [2024-06-21 20:55:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:32,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:33,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:33,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072740168] [2024-06-21 20:55:33,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072740168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:33,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:33,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:33,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913384316] [2024-06-21 20:55:33,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:33,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:33,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:33,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:33,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:33,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:33,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 273 transitions, 3878 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:33,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:33,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:33,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:34,298 INFO L124 PetriNetUnfolderBase]: 3978/6040 cut-off events. [2024-06-21 20:55:34,298 INFO L125 PetriNetUnfolderBase]: For 494842/494848 co-relation queries the response was YES. [2024-06-21 20:55:34,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55017 conditions, 6040 events. 3978/6040 cut-off events. For 494842/494848 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 33234 event pairs, 1035 based on Foata normal form. 12/6051 useless extension candidates. Maximal degree in co-relation 54915. Up to 5729 conditions per place. [2024-06-21 20:55:34,356 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 55 changer transitions 0/307 dead transitions. [2024-06-21 20:55:34,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 307 transitions, 4974 flow [2024-06-21 20:55:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:55:34,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:55:34,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:55:34,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 20:55:34,358 INFO L175 Difference]: Start difference. First operand has 204 places, 273 transitions, 3878 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:55:34,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 307 transitions, 4974 flow [2024-06-21 20:55:34,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 307 transitions, 4800 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 20:55:34,930 INFO L231 Difference]: Finished difference. Result has 206 places, 279 transitions, 4064 flow [2024-06-21 20:55:34,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3704, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4064, PETRI_PLACES=206, PETRI_TRANSITIONS=279} [2024-06-21 20:55:34,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-21 20:55:34,930 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 279 transitions, 4064 flow [2024-06-21 20:55:34,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:34,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:34,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:34,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:55:34,930 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:34,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:34,931 INFO L85 PathProgramCache]: Analyzing trace with hash -971939638, now seen corresponding path program 6 times [2024-06-21 20:55:34,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:34,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821382289] [2024-06-21 20:55:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:34,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:35,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:35,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821382289] [2024-06-21 20:55:35,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821382289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:35,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:35,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:35,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064665972] [2024-06-21 20:55:35,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:35,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:35,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:35,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:35,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:35,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:35,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 279 transitions, 4064 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:35,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:35,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:35,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:37,299 INFO L124 PetriNetUnfolderBase]: 3965/6021 cut-off events. [2024-06-21 20:55:37,299 INFO L125 PetriNetUnfolderBase]: For 502475/502479 co-relation queries the response was YES. [2024-06-21 20:55:37,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55004 conditions, 6021 events. 3965/6021 cut-off events. For 502475/502479 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33160 event pairs, 1057 based on Foata normal form. 10/6030 useless extension candidates. Maximal degree in co-relation 54901. Up to 5829 conditions per place. [2024-06-21 20:55:37,367 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 257 selfloop transitions, 45 changer transitions 0/305 dead transitions. [2024-06-21 20:55:37,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 305 transitions, 4736 flow [2024-06-21 20:55:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:55:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:55:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 20:55:37,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 20:55:37,369 INFO L175 Difference]: Start difference. First operand has 206 places, 279 transitions, 4064 flow. Second operand 8 states and 143 transitions. [2024-06-21 20:55:37,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 305 transitions, 4736 flow [2024-06-21 20:55:38,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 305 transitions, 4487 flow, removed 102 selfloop flow, removed 4 redundant places. [2024-06-21 20:55:38,121 INFO L231 Difference]: Finished difference. Result has 210 places, 279 transitions, 3917 flow [2024-06-21 20:55:38,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3815, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3917, PETRI_PLACES=210, PETRI_TRANSITIONS=279} [2024-06-21 20:55:38,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-21 20:55:38,121 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 279 transitions, 3917 flow [2024-06-21 20:55:38,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:38,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:38,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:38,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:55:38,122 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:38,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:38,122 INFO L85 PathProgramCache]: Analyzing trace with hash -962735428, now seen corresponding path program 7 times [2024-06-21 20:55:38,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:38,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462193324] [2024-06-21 20:55:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:38,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:38,899 INFO 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 20:55:38,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:38,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462193324] [2024-06-21 20:55:38,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462193324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:38,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:38,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:38,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634875945] [2024-06-21 20:55:38,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:38,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:38,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:38,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:38,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:38,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:38,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 279 transitions, 3917 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:38,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:38,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:38,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:40,054 INFO L124 PetriNetUnfolderBase]: 3965/6021 cut-off events. [2024-06-21 20:55:40,054 INFO L125 PetriNetUnfolderBase]: For 507224/507228 co-relation queries the response was YES. [2024-06-21 20:55:40,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54788 conditions, 6021 events. 3965/6021 cut-off events. For 507224/507228 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33047 event pairs, 994 based on Foata normal form. 10/6030 useless extension candidates. Maximal degree in co-relation 54683. Up to 5870 conditions per place. [2024-06-21 20:55:40,124 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 32 changer transitions 0/308 dead transitions. [2024-06-21 20:55:40,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 308 transitions, 4713 flow [2024-06-21 20:55:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:55:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:55:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 20:55:40,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 20:55:40,126 INFO L175 Difference]: Start difference. First operand has 210 places, 279 transitions, 3917 flow. Second operand 8 states and 141 transitions. [2024-06-21 20:55:40,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 308 transitions, 4713 flow [2024-06-21 20:55:40,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 308 transitions, 4611 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:55:40,798 INFO L231 Difference]: Finished difference. Result has 211 places, 282 transitions, 4015 flow [2024-06-21 20:55:40,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3815, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4015, PETRI_PLACES=211, PETRI_TRANSITIONS=282} [2024-06-21 20:55:40,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-21 20:55:40,799 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 282 transitions, 4015 flow [2024-06-21 20:55:40,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:40,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:40,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:40,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:55:40,799 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:40,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:40,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1228647910, now seen corresponding path program 7 times [2024-06-21 20:55:40,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:40,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474207041] [2024-06-21 20:55:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:40,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:41,653 INFO 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 20:55:41,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:41,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474207041] [2024-06-21 20:55:41,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474207041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:41,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:41,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:41,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322513381] [2024-06-21 20:55:41,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:41,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:41,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:41,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:41,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:41,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:41,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 282 transitions, 4015 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:41,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:41,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:41,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:42,932 INFO L124 PetriNetUnfolderBase]: 3965/6021 cut-off events. [2024-06-21 20:55:42,932 INFO L125 PetriNetUnfolderBase]: For 538579/538583 co-relation queries the response was YES. [2024-06-21 20:55:42,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54229 conditions, 6021 events. 3965/6021 cut-off events. For 538579/538583 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33014 event pairs, 1016 based on Foata normal form. 34/6054 useless extension candidates. Maximal degree in co-relation 54123. Up to 5687 conditions per place. [2024-06-21 20:55:42,992 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 283 selfloop transitions, 34 changer transitions 0/320 dead transitions. [2024-06-21 20:55:42,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 320 transitions, 4873 flow [2024-06-21 20:55:42,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:55:42,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:55:42,993 INFO L175 Difference]: Start difference. First operand has 211 places, 282 transitions, 4015 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:55:42,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 320 transitions, 4873 flow [2024-06-21 20:55:43,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 320 transitions, 4697 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 20:55:43,460 INFO L231 Difference]: Finished difference. Result has 215 places, 285 transitions, 4047 flow [2024-06-21 20:55:43,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3839, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4047, PETRI_PLACES=215, PETRI_TRANSITIONS=285} [2024-06-21 20:55:43,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-21 20:55:43,460 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 285 transitions, 4047 flow [2024-06-21 20:55:43,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:43,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:43,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:43,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:55:43,461 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:43,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:43,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2052035485, now seen corresponding path program 3 times [2024-06-21 20:55:43,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:43,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413121334] [2024-06-21 20:55:43,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:43,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:44,021 INFO 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 20:55:44,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:44,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413121334] [2024-06-21 20:55:44,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413121334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:44,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:44,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:44,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760510415] [2024-06-21 20:55:44,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:44,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:44,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:44,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:44,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:44,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:44,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 285 transitions, 4047 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:44,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:44,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:44,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:45,193 INFO L124 PetriNetUnfolderBase]: 3959/6015 cut-off events. [2024-06-21 20:55:45,193 INFO L125 PetriNetUnfolderBase]: For 513204/513206 co-relation queries the response was YES. [2024-06-21 20:55:45,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54187 conditions, 6015 events. 3959/6015 cut-off events. For 513204/513206 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33006 event pairs, 1041 based on Foata normal form. 6/6020 useless extension candidates. Maximal degree in co-relation 54079. Up to 5919 conditions per place. [2024-06-21 20:55:45,267 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 261 selfloop transitions, 34 changer transitions 0/298 dead transitions. [2024-06-21 20:55:45,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 298 transitions, 4781 flow [2024-06-21 20:55:45,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:45,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 20:55:45,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-21 20:55:45,268 INFO L175 Difference]: Start difference. First operand has 215 places, 285 transitions, 4047 flow. Second operand 7 states and 120 transitions. [2024-06-21 20:55:45,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 298 transitions, 4781 flow [2024-06-21 20:55:45,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 298 transitions, 4629 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 20:55:45,894 INFO L231 Difference]: Finished difference. Result has 216 places, 285 transitions, 3973 flow [2024-06-21 20:55:45,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3895, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3973, PETRI_PLACES=216, PETRI_TRANSITIONS=285} [2024-06-21 20:55:45,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-21 20:55:45,895 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 285 transitions, 3973 flow [2024-06-21 20:55:45,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:45,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:45,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:45,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:55:45,895 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:45,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:45,896 INFO L85 PathProgramCache]: Analyzing trace with hash 885356313, now seen corresponding path program 2 times [2024-06-21 20:55:45,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:45,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724912432] [2024-06-21 20:55:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:45,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:46,439 INFO 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 20:55:46,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:46,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724912432] [2024-06-21 20:55:46,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724912432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:46,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:46,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:46,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915211902] [2024-06-21 20:55:46,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:46,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:46,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:46,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:46,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:46,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 285 transitions, 3973 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:46,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:46,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:46,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:47,546 INFO L124 PetriNetUnfolderBase]: 3974/6034 cut-off events. [2024-06-21 20:55:47,547 INFO L125 PetriNetUnfolderBase]: For 510883/510883 co-relation queries the response was YES. [2024-06-21 20:55:47,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53780 conditions, 6034 events. 3974/6034 cut-off events. For 510883/510883 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33081 event pairs, 1035 based on Foata normal form. 3/6036 useless extension candidates. Maximal degree in co-relation 53671. Up to 5990 conditions per place. [2024-06-21 20:55:47,604 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 281 selfloop transitions, 19 changer transitions 0/303 dead transitions. [2024-06-21 20:55:47,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 303 transitions, 4767 flow [2024-06-21 20:55:47,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 20:55:47,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-21 20:55:47,605 INFO L175 Difference]: Start difference. First operand has 216 places, 285 transitions, 3973 flow. Second operand 7 states and 114 transitions. [2024-06-21 20:55:47,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 303 transitions, 4767 flow [2024-06-21 20:55:48,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 303 transitions, 4491 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 20:55:48,005 INFO L231 Difference]: Finished difference. Result has 214 places, 288 transitions, 3785 flow [2024-06-21 20:55:48,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3697, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3785, PETRI_PLACES=214, PETRI_TRANSITIONS=288} [2024-06-21 20:55:48,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-21 20:55:48,005 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 288 transitions, 3785 flow [2024-06-21 20:55:48,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:48,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:48,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:48,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:55:48,006 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:48,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:48,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1685499753, now seen corresponding path program 3 times [2024-06-21 20:55:48,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:48,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729150316] [2024-06-21 20:55:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:48,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:48,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:48,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729150316] [2024-06-21 20:55:48,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729150316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:48,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:48,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:48,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178288971] [2024-06-21 20:55:48,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:48,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:48,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:48,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:48,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:48,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:48,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 288 transitions, 3785 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:48,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:48,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:48,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:49,636 INFO L124 PetriNetUnfolderBase]: 3965/6022 cut-off events. [2024-06-21 20:55:49,636 INFO L125 PetriNetUnfolderBase]: For 519141/519141 co-relation queries the response was YES. [2024-06-21 20:55:49,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53255 conditions, 6022 events. 3965/6022 cut-off events. For 519141/519141 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33040 event pairs, 1033 based on Foata normal form. 3/6024 useless extension candidates. Maximal degree in co-relation 53147. Up to 5995 conditions per place. [2024-06-21 20:55:49,697 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 283 selfloop transitions, 14 changer transitions 0/300 dead transitions. [2024-06-21 20:55:49,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 300 transitions, 4409 flow [2024-06-21 20:55:49,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:49,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 20:55:49,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-21 20:55:49,698 INFO L175 Difference]: Start difference. First operand has 214 places, 288 transitions, 3785 flow. Second operand 7 states and 109 transitions. [2024-06-21 20:55:49,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 300 transitions, 4409 flow [2024-06-21 20:55:50,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 300 transitions, 4301 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 20:55:50,360 INFO L231 Difference]: Finished difference. Result has 216 places, 288 transitions, 3711 flow [2024-06-21 20:55:50,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3677, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3711, PETRI_PLACES=216, PETRI_TRANSITIONS=288} [2024-06-21 20:55:50,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-21 20:55:50,361 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 288 transitions, 3711 flow [2024-06-21 20:55:50,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:50,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:50,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:50,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:55:50,361 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:50,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:50,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1862862471, now seen corresponding path program 1 times [2024-06-21 20:55:50,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:50,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489003845] [2024-06-21 20:55:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:50,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:50,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:50,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489003845] [2024-06-21 20:55:50,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489003845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:50,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:50,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:50,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298354585] [2024-06-21 20:55:50,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:50,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:50,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:50,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:50,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:50,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:50,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 288 transitions, 3711 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:50,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:50,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:50,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:52,173 INFO L124 PetriNetUnfolderBase]: 4010/6085 cut-off events. [2024-06-21 20:55:52,173 INFO L125 PetriNetUnfolderBase]: For 526818/526818 co-relation queries the response was YES. [2024-06-21 20:55:52,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53349 conditions, 6085 events. 4010/6085 cut-off events. For 526818/526818 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33431 event pairs, 1031 based on Foata normal form. 9/6093 useless extension candidates. Maximal degree in co-relation 53241. Up to 5907 conditions per place. [2024-06-21 20:55:52,233 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 282 selfloop transitions, 32 changer transitions 0/317 dead transitions. [2024-06-21 20:55:52,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 317 transitions, 4621 flow [2024-06-21 20:55:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 20:55:52,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-21 20:55:52,234 INFO L175 Difference]: Start difference. First operand has 216 places, 288 transitions, 3711 flow. Second operand 7 states and 127 transitions. [2024-06-21 20:55:52,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 317 transitions, 4621 flow [2024-06-21 20:55:52,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 317 transitions, 4583 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:55:52,925 INFO L231 Difference]: Finished difference. Result has 217 places, 295 transitions, 3835 flow [2024-06-21 20:55:52,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3673, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3835, PETRI_PLACES=217, PETRI_TRANSITIONS=295} [2024-06-21 20:55:52,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-21 20:55:52,926 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 295 transitions, 3835 flow [2024-06-21 20:55:52,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:52,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:52,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:52,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:55:52,926 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:52,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:52,926 INFO L85 PathProgramCache]: Analyzing trace with hash -2051613451, now seen corresponding path program 2 times [2024-06-21 20:55:52,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:52,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651716361] [2024-06-21 20:55:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:52,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:53,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:53,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651716361] [2024-06-21 20:55:53,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651716361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:53,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:53,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:53,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662821533] [2024-06-21 20:55:53,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:53,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:53,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:53,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:53,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:53,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:53,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 295 transitions, 3835 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:53,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:53,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:53,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:54,862 INFO L124 PetriNetUnfolderBase]: 4025/6108 cut-off events. [2024-06-21 20:55:54,862 INFO L125 PetriNetUnfolderBase]: For 536773/536775 co-relation queries the response was YES. [2024-06-21 20:55:54,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54423 conditions, 6108 events. 4025/6108 cut-off events. For 536773/536775 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33609 event pairs, 1045 based on Foata normal form. 3/6110 useless extension candidates. Maximal degree in co-relation 54314. Up to 5915 conditions per place. [2024-06-21 20:55:54,933 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 278 selfloop transitions, 40 changer transitions 0/321 dead transitions. [2024-06-21 20:55:54,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 321 transitions, 4861 flow [2024-06-21 20:55:54,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 20:55:54,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:55:54,935 INFO L175 Difference]: Start difference. First operand has 217 places, 295 transitions, 3835 flow. Second operand 7 states and 126 transitions. [2024-06-21 20:55:54,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 321 transitions, 4861 flow [2024-06-21 20:55:55,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 321 transitions, 4786 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 20:55:55,524 INFO L231 Difference]: Finished difference. Result has 221 places, 301 transitions, 3953 flow [2024-06-21 20:55:55,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3764, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3953, PETRI_PLACES=221, PETRI_TRANSITIONS=301} [2024-06-21 20:55:55,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-21 20:55:55,524 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 301 transitions, 3953 flow [2024-06-21 20:55:55,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:55,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:55,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:55,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:55:55,525 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:55,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:55,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1685730951, now seen corresponding path program 3 times [2024-06-21 20:55:55,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:55,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005821413] [2024-06-21 20:55:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:55,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:56,070 INFO 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 20:55:56,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:56,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005821413] [2024-06-21 20:55:56,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005821413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:56,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:56,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:56,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747289209] [2024-06-21 20:55:56,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:56,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:56,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:56,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:56,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:56,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:56,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 301 transitions, 3953 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:56,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:56,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:56,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:57,343 INFO L124 PetriNetUnfolderBase]: 4016/6096 cut-off events. [2024-06-21 20:55:57,343 INFO L125 PetriNetUnfolderBase]: For 547945/547947 co-relation queries the response was YES. [2024-06-21 20:55:57,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54509 conditions, 6096 events. 4016/6096 cut-off events. For 547945/547947 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33505 event pairs, 1045 based on Foata normal form. 3/6098 useless extension candidates. Maximal degree in co-relation 54398. Up to 5911 conditions per place. [2024-06-21 20:55:57,414 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 281 selfloop transitions, 38 changer transitions 0/322 dead transitions. [2024-06-21 20:55:57,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 322 transitions, 4767 flow [2024-06-21 20:55:57,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 20:55:57,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:55:57,415 INFO L175 Difference]: Start difference. First operand has 221 places, 301 transitions, 3953 flow. Second operand 7 states and 126 transitions. [2024-06-21 20:55:57,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 322 transitions, 4767 flow [2024-06-21 20:55:58,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 322 transitions, 4659 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 20:55:58,167 INFO L231 Difference]: Finished difference. Result has 225 places, 301 transitions, 3927 flow [2024-06-21 20:55:58,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3927, PETRI_PLACES=225, PETRI_TRANSITIONS=301} [2024-06-21 20:55:58,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-21 20:55:58,167 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 301 transitions, 3927 flow [2024-06-21 20:55:58,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:58,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:58,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:58,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:55:58,168 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:58,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:58,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1604597502, now seen corresponding path program 1 times [2024-06-21 20:55:58,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:58,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865074454] [2024-06-21 20:55:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:58,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:58,906 INFO 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 20:55:58,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:58,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865074454] [2024-06-21 20:55:58,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865074454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:58,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:58,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:55:58,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440977230] [2024-06-21 20:55:58,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:58,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:55:58,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:58,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:55:58,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:55:58,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:55:58,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 301 transitions, 3927 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:58,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:58,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:55:58,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:00,054 INFO L124 PetriNetUnfolderBase]: 4041/6131 cut-off events. [2024-06-21 20:56:00,054 INFO L125 PetriNetUnfolderBase]: For 566428/566430 co-relation queries the response was YES. [2024-06-21 20:56:00,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55005 conditions, 6131 events. 4041/6131 cut-off events. For 566428/566430 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 33750 event pairs, 924 based on Foata normal form. 5/6135 useless extension candidates. Maximal degree in co-relation 54892. Up to 5364 conditions per place. [2024-06-21 20:56:00,123 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 227 selfloop transitions, 118 changer transitions 0/348 dead transitions. [2024-06-21 20:56:00,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 348 transitions, 5273 flow [2024-06-21 20:56:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:00,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 20:56:00,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 20:56:00,124 INFO L175 Difference]: Start difference. First operand has 225 places, 301 transitions, 3927 flow. Second operand 8 states and 160 transitions. [2024-06-21 20:56:00,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 348 transitions, 5273 flow [2024-06-21 20:56:00,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 348 transitions, 5179 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:56:00,893 INFO L231 Difference]: Finished difference. Result has 228 places, 312 transitions, 4337 flow [2024-06-21 20:56:00,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3833, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4337, PETRI_PLACES=228, PETRI_TRANSITIONS=312} [2024-06-21 20:56:00,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-21 20:56:00,893 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 312 transitions, 4337 flow [2024-06-21 20:56:00,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:00,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:00,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:00,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:56:00,894 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:00,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:00,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1604328732, now seen corresponding path program 2 times [2024-06-21 20:56:00,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:00,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10109554] [2024-06-21 20:56:00,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:00,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:00,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:01,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:01,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10109554] [2024-06-21 20:56:01,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10109554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:01,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:01,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:01,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081443479] [2024-06-21 20:56:01,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:01,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:01,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:01,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:01,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:01,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:01,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 312 transitions, 4337 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:01,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:01,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:01,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:02,944 INFO L124 PetriNetUnfolderBase]: 4061/6159 cut-off events. [2024-06-21 20:56:02,944 INFO L125 PetriNetUnfolderBase]: For 583622/583624 co-relation queries the response was YES. [2024-06-21 20:56:02,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56550 conditions, 6159 events. 4061/6159 cut-off events. For 583622/583624 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 33915 event pairs, 925 based on Foata normal form. 6/6164 useless extension candidates. Maximal degree in co-relation 56435. Up to 5648 conditions per place. [2024-06-21 20:56:03,018 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 264 selfloop transitions, 78 changer transitions 0/345 dead transitions. [2024-06-21 20:56:03,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 345 transitions, 5330 flow [2024-06-21 20:56:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:56:03,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 20:56:03,019 INFO L175 Difference]: Start difference. First operand has 228 places, 312 transitions, 4337 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:56:03,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 345 transitions, 5330 flow [2024-06-21 20:56:03,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 345 transitions, 5039 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 20:56:03,657 INFO L231 Difference]: Finished difference. Result has 231 places, 317 transitions, 4331 flow [2024-06-21 20:56:03,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4054, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4331, PETRI_PLACES=231, PETRI_TRANSITIONS=317} [2024-06-21 20:56:03,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-21 20:56:03,658 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 317 transitions, 4331 flow [2024-06-21 20:56:03,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:03,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:03,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:03,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:56:03,659 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:03,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:03,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1169711253, now seen corresponding path program 1 times [2024-06-21 20:56:03,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:03,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868429648] [2024-06-21 20:56:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:03,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:04,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:04,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868429648] [2024-06-21 20:56:04,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868429648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:04,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:04,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:04,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643599631] [2024-06-21 20:56:04,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:04,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:04,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:04,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:04,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:04,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:04,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 317 transitions, 4331 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:04,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:04,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:04,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:05,562 INFO L124 PetriNetUnfolderBase]: 4321/6518 cut-off events. [2024-06-21 20:56:05,562 INFO L125 PetriNetUnfolderBase]: For 668786/668788 co-relation queries the response was YES. [2024-06-21 20:56:05,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60306 conditions, 6518 events. 4321/6518 cut-off events. For 668786/668788 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36012 event pairs, 971 based on Foata normal form. 14/6531 useless extension candidates. Maximal degree in co-relation 60191. Up to 5556 conditions per place. [2024-06-21 20:56:05,637 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 292 selfloop transitions, 82 changer transitions 0/377 dead transitions. [2024-06-21 20:56:05,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 377 transitions, 5899 flow [2024-06-21 20:56:05,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:05,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 20:56:05,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-21 20:56:05,638 INFO L175 Difference]: Start difference. First operand has 231 places, 317 transitions, 4331 flow. Second operand 8 states and 161 transitions. [2024-06-21 20:56:05,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 377 transitions, 5899 flow [2024-06-21 20:56:06,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 377 transitions, 5699 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 20:56:06,657 INFO L231 Difference]: Finished difference. Result has 235 places, 336 transitions, 4663 flow [2024-06-21 20:56:06,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4131, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4663, PETRI_PLACES=235, PETRI_TRANSITIONS=336} [2024-06-21 20:56:06,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-21 20:56:06,658 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 336 transitions, 4663 flow [2024-06-21 20:56:06,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:06,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:06,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:06,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:56:06,659 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:06,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:06,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1173255390, now seen corresponding path program 1 times [2024-06-21 20:56:06,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:06,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745120652] [2024-06-21 20:56:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:06,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:07,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:07,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745120652] [2024-06-21 20:56:07,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745120652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:07,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:07,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:56:07,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132053188] [2024-06-21 20:56:07,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:07,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:56:07,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:07,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:56:07,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:56:07,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:07,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 336 transitions, 4663 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:07,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:07,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:07,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:08,548 INFO L124 PetriNetUnfolderBase]: 4319/6516 cut-off events. [2024-06-21 20:56:08,548 INFO L125 PetriNetUnfolderBase]: For 674289/674291 co-relation queries the response was YES. [2024-06-21 20:56:08,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62017 conditions, 6516 events. 4319/6516 cut-off events. For 674289/674291 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 35926 event pairs, 974 based on Foata normal form. 8/6523 useless extension candidates. Maximal degree in co-relation 61899. Up to 6019 conditions per place. [2024-06-21 20:56:08,631 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 292 selfloop transitions, 69 changer transitions 0/364 dead transitions. [2024-06-21 20:56:08,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 364 transitions, 5775 flow [2024-06-21 20:56:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:56:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:56:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 20:56:08,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:56:08,632 INFO L175 Difference]: Start difference. First operand has 235 places, 336 transitions, 4663 flow. Second operand 7 states and 133 transitions. [2024-06-21 20:56:08,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 364 transitions, 5775 flow [2024-06-21 20:56:09,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 364 transitions, 5656 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-21 20:56:09,545 INFO L231 Difference]: Finished difference. Result has 240 places, 340 transitions, 4761 flow [2024-06-21 20:56:09,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4544, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4761, PETRI_PLACES=240, PETRI_TRANSITIONS=340} [2024-06-21 20:56:09,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-21 20:56:09,546 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 340 transitions, 4761 flow [2024-06-21 20:56:09,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:09,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:09,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:09,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:56:09,546 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:09,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:09,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1178969310, now seen corresponding path program 2 times [2024-06-21 20:56:09,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:09,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055099793] [2024-06-21 20:56:09,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:09,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:10,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:10,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055099793] [2024-06-21 20:56:10,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055099793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:10,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:10,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:56:10,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145794408] [2024-06-21 20:56:10,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:10,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:56:10,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:10,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:56:10,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:56:10,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:10,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 340 transitions, 4761 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:10,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:10,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:10,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:11,402 INFO L124 PetriNetUnfolderBase]: 4313/6508 cut-off events. [2024-06-21 20:56:11,402 INFO L125 PetriNetUnfolderBase]: For 679580/679582 co-relation queries the response was YES. [2024-06-21 20:56:11,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61920 conditions, 6508 events. 4313/6508 cut-off events. For 679580/679582 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 35897 event pairs, 976 based on Foata normal form. 4/6511 useless extension candidates. Maximal degree in co-relation 61799. Up to 6016 conditions per place. [2024-06-21 20:56:11,481 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 284 selfloop transitions, 73 changer transitions 0/360 dead transitions. [2024-06-21 20:56:11,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 360 transitions, 5787 flow [2024-06-21 20:56:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:56:11,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:56:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 20:56:11,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-21 20:56:11,482 INFO L175 Difference]: Start difference. First operand has 240 places, 340 transitions, 4761 flow. Second operand 7 states and 128 transitions. [2024-06-21 20:56:11,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 360 transitions, 5787 flow [2024-06-21 20:56:12,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 360 transitions, 5672 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:56:12,408 INFO L231 Difference]: Finished difference. Result has 243 places, 340 transitions, 4801 flow [2024-06-21 20:56:12,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4646, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4801, PETRI_PLACES=243, PETRI_TRANSITIONS=340} [2024-06-21 20:56:12,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-21 20:56:12,408 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 340 transitions, 4801 flow [2024-06-21 20:56:12,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:12,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:12,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:12,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:56:12,409 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:12,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:12,409 INFO L85 PathProgramCache]: Analyzing trace with hash 223002891, now seen corresponding path program 1 times [2024-06-21 20:56:12,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:12,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532653898] [2024-06-21 20:56:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:12,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:13,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:13,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532653898] [2024-06-21 20:56:13,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532653898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:13,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:13,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:56:13,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105376784] [2024-06-21 20:56:13,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:13,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:56:13,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:13,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:56:13,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:56:13,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:13,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 340 transitions, 4801 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:13,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:13,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:13,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:15,265 INFO L124 PetriNetUnfolderBase]: 4381/6624 cut-off events. [2024-06-21 20:56:15,265 INFO L125 PetriNetUnfolderBase]: For 746459/746461 co-relation queries the response was YES. [2024-06-21 20:56:15,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63280 conditions, 6624 events. 4381/6624 cut-off events. For 746459/746461 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 36822 event pairs, 942 based on Foata normal form. 20/6643 useless extension candidates. Maximal degree in co-relation 63158. Up to 5850 conditions per place. [2024-06-21 20:56:15,351 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 290 selfloop transitions, 87 changer transitions 0/380 dead transitions. [2024-06-21 20:56:15,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 380 transitions, 5902 flow [2024-06-21 20:56:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:56:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:56:15,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 20:56:15,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 20:56:15,353 INFO L175 Difference]: Start difference. First operand has 243 places, 340 transitions, 4801 flow. Second operand 9 states and 167 transitions. [2024-06-21 20:56:15,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 380 transitions, 5902 flow [2024-06-21 20:56:16,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 380 transitions, 5785 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 20:56:16,320 INFO L231 Difference]: Finished difference. Result has 248 places, 342 transitions, 4980 flow [2024-06-21 20:56:16,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4684, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4980, PETRI_PLACES=248, PETRI_TRANSITIONS=342} [2024-06-21 20:56:16,321 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-21 20:56:16,321 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 342 transitions, 4980 flow [2024-06-21 20:56:16,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:16,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:16,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:16,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:56:16,321 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:16,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:16,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1305344973, now seen corresponding path program 2 times [2024-06-21 20:56:16,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:16,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892086454] [2024-06-21 20:56:16,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:16,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:17,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:17,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892086454] [2024-06-21 20:56:17,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892086454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:17,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:17,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:17,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508894715] [2024-06-21 20:56:17,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:17,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:17,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:17,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:17,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:17,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:17,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 342 transitions, 4980 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:17,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:17,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:17,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:18,406 INFO L124 PetriNetUnfolderBase]: 4699/7065 cut-off events. [2024-06-21 20:56:18,406 INFO L125 PetriNetUnfolderBase]: For 821702/821704 co-relation queries the response was YES. [2024-06-21 20:56:18,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69373 conditions, 7065 events. 4699/7065 cut-off events. For 821702/821704 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 39463 event pairs, 1008 based on Foata normal form. 14/7078 useless extension candidates. Maximal degree in co-relation 69250. Up to 5842 conditions per place. [2024-06-21 20:56:18,496 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 298 selfloop transitions, 90 changer transitions 0/391 dead transitions. [2024-06-21 20:56:18,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 391 transitions, 6692 flow [2024-06-21 20:56:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:56:18,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-21 20:56:18,498 INFO L175 Difference]: Start difference. First operand has 248 places, 342 transitions, 4980 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:56:18,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 391 transitions, 6692 flow [2024-06-21 20:56:19,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 391 transitions, 6423 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 20:56:19,606 INFO L231 Difference]: Finished difference. Result has 250 places, 355 transitions, 5170 flow [2024-06-21 20:56:19,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4711, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5170, PETRI_PLACES=250, PETRI_TRANSITIONS=355} [2024-06-21 20:56:19,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-21 20:56:19,607 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 355 transitions, 5170 flow [2024-06-21 20:56:19,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:19,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:19,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:19,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:56:19,607 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:19,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:19,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1178965683, now seen corresponding path program 3 times [2024-06-21 20:56:19,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:19,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077066560] [2024-06-21 20:56:19,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:19,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:20,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:20,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077066560] [2024-06-21 20:56:20,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077066560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:20,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:20,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:20,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407354915] [2024-06-21 20:56:20,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:20,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:20,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:20,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:20,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:20,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:20,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 355 transitions, 5170 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:20,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:20,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:20,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:21,755 INFO L124 PetriNetUnfolderBase]: 4681/7044 cut-off events. [2024-06-21 20:56:21,755 INFO L125 PetriNetUnfolderBase]: For 826076/826078 co-relation queries the response was YES. [2024-06-21 20:56:21,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68860 conditions, 7044 events. 4681/7044 cut-off events. For 826076/826078 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 39354 event pairs, 1007 based on Foata normal form. 14/7057 useless extension candidates. Maximal degree in co-relation 68735. Up to 5838 conditions per place. [2024-06-21 20:56:21,846 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 298 selfloop transitions, 92 changer transitions 0/393 dead transitions. [2024-06-21 20:56:21,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 393 transitions, 6568 flow [2024-06-21 20:56:21,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 20:56:21,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-21 20:56:21,847 INFO L175 Difference]: Start difference. First operand has 250 places, 355 transitions, 5170 flow. Second operand 8 states and 158 transitions. [2024-06-21 20:56:21,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 393 transitions, 6568 flow [2024-06-21 20:56:22,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 393 transitions, 6311 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-21 20:56:22,748 INFO L231 Difference]: Finished difference. Result has 254 places, 357 transitions, 5165 flow [2024-06-21 20:56:22,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4937, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5165, PETRI_PLACES=254, PETRI_TRANSITIONS=357} [2024-06-21 20:56:22,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-21 20:56:22,749 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 357 transitions, 5165 flow [2024-06-21 20:56:22,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:22,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:22,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:22,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:56:22,749 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:22,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:22,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1178965342, now seen corresponding path program 3 times [2024-06-21 20:56:22,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:22,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564773118] [2024-06-21 20:56:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:22,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:23,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:23,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564773118] [2024-06-21 20:56:23,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564773118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:23,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:23,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:23,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164585552] [2024-06-21 20:56:23,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:23,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:23,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:23,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:23,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:23,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:23,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 357 transitions, 5165 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:23,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:23,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:23,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:25,068 INFO L124 PetriNetUnfolderBase]: 4707/7081 cut-off events. [2024-06-21 20:56:25,068 INFO L125 PetriNetUnfolderBase]: For 823029/823031 co-relation queries the response was YES. [2024-06-21 20:56:25,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68541 conditions, 7081 events. 4707/7081 cut-off events. For 823029/823031 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 39546 event pairs, 1040 based on Foata normal form. 6/7086 useless extension candidates. Maximal degree in co-relation 68415. Up to 6571 conditions per place. [2024-06-21 20:56:25,156 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 303 selfloop transitions, 79 changer transitions 0/385 dead transitions. [2024-06-21 20:56:25,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 385 transitions, 6384 flow [2024-06-21 20:56:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:25,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:56:25,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 20:56:25,161 INFO L175 Difference]: Start difference. First operand has 254 places, 357 transitions, 5165 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:56:25,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 385 transitions, 6384 flow [2024-06-21 20:56:26,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 385 transitions, 6206 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 20:56:26,194 INFO L231 Difference]: Finished difference. Result has 257 places, 362 transitions, 5276 flow [2024-06-21 20:56:26,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4987, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5276, PETRI_PLACES=257, PETRI_TRANSITIONS=362} [2024-06-21 20:56:26,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-21 20:56:26,195 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 362 transitions, 5276 flow [2024-06-21 20:56:26,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:26,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:26,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:26,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:56:26,195 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:26,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:26,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2054803420, now seen corresponding path program 3 times [2024-06-21 20:56:26,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:26,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807801103] [2024-06-21 20:56:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:26,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:26,763 INFO 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 20:56:26,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:26,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807801103] [2024-06-21 20:56:26,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807801103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:26,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:26,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:26,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710281486] [2024-06-21 20:56:26,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:26,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:26,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:26,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:26,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:26,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:26,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 362 transitions, 5276 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:26,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:26,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:26,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:28,187 INFO L124 PetriNetUnfolderBase]: 4834/7260 cut-off events. [2024-06-21 20:56:28,187 INFO L125 PetriNetUnfolderBase]: For 849462/849462 co-relation queries the response was YES. [2024-06-21 20:56:28,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70592 conditions, 7260 events. 4834/7260 cut-off events. For 849462/849462 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 40613 event pairs, 1193 based on Foata normal form. 3/7262 useless extension candidates. Maximal degree in co-relation 70465. Up to 7126 conditions per place. [2024-06-21 20:56:28,283 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 367 selfloop transitions, 41 changer transitions 0/411 dead transitions. [2024-06-21 20:56:28,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 411 transitions, 6881 flow [2024-06-21 20:56:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:28,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:28,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 20:56:28,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 20:56:28,284 INFO L175 Difference]: Start difference. First operand has 257 places, 362 transitions, 5276 flow. Second operand 8 states and 135 transitions. [2024-06-21 20:56:28,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 411 transitions, 6881 flow [2024-06-21 20:56:29,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 411 transitions, 6629 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:56:29,463 INFO L231 Difference]: Finished difference. Result has 261 places, 387 transitions, 5705 flow [2024-06-21 20:56:29,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5064, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5705, PETRI_PLACES=261, PETRI_TRANSITIONS=387} [2024-06-21 20:56:29,464 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-21 20:56:29,464 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 387 transitions, 5705 flow [2024-06-21 20:56:29,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:29,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:29,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:29,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:56:29,464 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:29,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:29,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1925602082, now seen corresponding path program 4 times [2024-06-21 20:56:29,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:29,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545040276] [2024-06-21 20:56:29,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:29,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:30,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:30,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545040276] [2024-06-21 20:56:30,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545040276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:30,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:30,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:56:30,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135112362] [2024-06-21 20:56:30,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:30,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:56:30,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:30,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:56:30,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:56:30,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:30,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 387 transitions, 5705 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:30,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:30,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:30,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:31,463 INFO L124 PetriNetUnfolderBase]: 4795/7203 cut-off events. [2024-06-21 20:56:31,463 INFO L125 PetriNetUnfolderBase]: For 864561/864561 co-relation queries the response was YES. [2024-06-21 20:56:31,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70142 conditions, 7203 events. 4795/7203 cut-off events. For 864561/864561 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40259 event pairs, 1173 based on Foata normal form. 3/7205 useless extension candidates. Maximal degree in co-relation 70012. Up to 6978 conditions per place. [2024-06-21 20:56:31,565 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 345 selfloop transitions, 57 changer transitions 0/405 dead transitions. [2024-06-21 20:56:31,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 405 transitions, 6705 flow [2024-06-21 20:56:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:56:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:56:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 20:56:31,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 20:56:31,566 INFO L175 Difference]: Start difference. First operand has 261 places, 387 transitions, 5705 flow. Second operand 7 states and 122 transitions. [2024-06-21 20:56:31,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 405 transitions, 6705 flow [2024-06-21 20:56:32,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 405 transitions, 6639 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 20:56:32,786 INFO L231 Difference]: Finished difference. Result has 265 places, 387 transitions, 5769 flow [2024-06-21 20:56:32,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5639, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5769, PETRI_PLACES=265, PETRI_TRANSITIONS=387} [2024-06-21 20:56:32,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-21 20:56:32,787 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 387 transitions, 5769 flow [2024-06-21 20:56:32,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:32,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:32,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:32,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:56:32,787 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:32,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:32,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1264214116, now seen corresponding path program 5 times [2024-06-21 20:56:32,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:32,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134294509] [2024-06-21 20:56:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:32,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:33,281 INFO 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 20:56:33,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:33,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134294509] [2024-06-21 20:56:33,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134294509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:33,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:33,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:56:33,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318692492] [2024-06-21 20:56:33,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:33,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:56:33,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:33,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:56:33,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:56:33,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:33,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 387 transitions, 5769 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:33,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:33,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:33,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:34,779 INFO L124 PetriNetUnfolderBase]: 4777/7180 cut-off events. [2024-06-21 20:56:34,780 INFO L125 PetriNetUnfolderBase]: For 881349/881349 co-relation queries the response was YES. [2024-06-21 20:56:34,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69918 conditions, 7180 events. 4777/7180 cut-off events. For 881349/881349 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40124 event pairs, 1196 based on Foata normal form. 6/7185 useless extension candidates. Maximal degree in co-relation 69787. Up to 7095 conditions per place. [2024-06-21 20:56:34,881 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 367 selfloop transitions, 33 changer transitions 0/403 dead transitions. [2024-06-21 20:56:34,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 403 transitions, 6668 flow [2024-06-21 20:56:34,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:56:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:56:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 20:56:34,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-21 20:56:34,882 INFO L175 Difference]: Start difference. First operand has 265 places, 387 transitions, 5769 flow. Second operand 7 states and 116 transitions. [2024-06-21 20:56:34,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 403 transitions, 6668 flow [2024-06-21 20:56:36,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 403 transitions, 6522 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:56:36,447 INFO L231 Difference]: Finished difference. Result has 266 places, 390 transitions, 5767 flow [2024-06-21 20:56:36,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5625, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5767, PETRI_PLACES=266, PETRI_TRANSITIONS=390} [2024-06-21 20:56:36,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-21 20:56:36,448 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 390 transitions, 5767 flow [2024-06-21 20:56:36,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:36,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:36,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:36,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:56:36,448 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:36,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:36,449 INFO L85 PathProgramCache]: Analyzing trace with hash -858362801, now seen corresponding path program 2 times [2024-06-21 20:56:36,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:36,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590965797] [2024-06-21 20:56:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:36,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:37,491 INFO 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 20:56:37,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:37,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590965797] [2024-06-21 20:56:37,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590965797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:37,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:37,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:37,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353535522] [2024-06-21 20:56:37,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:37,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:37,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:37,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:37,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:37,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:37,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 390 transitions, 5767 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:37,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:37,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:37,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:39,110 INFO L124 PetriNetUnfolderBase]: 4838/7281 cut-off events. [2024-06-21 20:56:39,110 INFO L125 PetriNetUnfolderBase]: For 921319/921327 co-relation queries the response was YES. [2024-06-21 20:56:39,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70643 conditions, 7281 events. 4838/7281 cut-off events. For 921319/921327 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40823 event pairs, 1120 based on Foata normal form. 26/7306 useless extension candidates. Maximal degree in co-relation 70511. Up to 7013 conditions per place. [2024-06-21 20:56:39,208 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 384 selfloop transitions, 39 changer transitions 0/426 dead transitions. [2024-06-21 20:56:39,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 426 transitions, 6824 flow [2024-06-21 20:56:39,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:56:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:56:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 20:56:39,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 20:56:39,209 INFO L175 Difference]: Start difference. First operand has 266 places, 390 transitions, 5767 flow. Second operand 9 states and 158 transitions. [2024-06-21 20:56:39,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 426 transitions, 6824 flow [2024-06-21 20:56:40,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 426 transitions, 6725 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 20:56:40,501 INFO L231 Difference]: Finished difference. Result has 269 places, 392 transitions, 5865 flow [2024-06-21 20:56:40,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5668, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5865, PETRI_PLACES=269, PETRI_TRANSITIONS=392} [2024-06-21 20:56:40,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-21 20:56:40,502 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 392 transitions, 5865 flow [2024-06-21 20:56:40,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:40,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:40,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:40,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:56:40,502 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:40,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:40,502 INFO L85 PathProgramCache]: Analyzing trace with hash -65356379, now seen corresponding path program 3 times [2024-06-21 20:56:40,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:40,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875845891] [2024-06-21 20:56:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:40,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:41,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:41,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875845891] [2024-06-21 20:56:41,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875845891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:41,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:41,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:41,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165851796] [2024-06-21 20:56:41,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:41,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:41,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:41,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:41,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:41,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:41,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 392 transitions, 5865 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:41,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:41,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:41,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:43,282 INFO L124 PetriNetUnfolderBase]: 4960/7487 cut-off events. [2024-06-21 20:56:43,282 INFO L125 PetriNetUnfolderBase]: For 958533/958541 co-relation queries the response was YES. [2024-06-21 20:56:43,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72462 conditions, 7487 events. 4960/7487 cut-off events. For 958533/958541 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 42522 event pairs, 1172 based on Foata normal form. 26/7512 useless extension candidates. Maximal degree in co-relation 72329. Up to 7059 conditions per place. [2024-06-21 20:56:43,386 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 369 selfloop transitions, 58 changer transitions 0/430 dead transitions. [2024-06-21 20:56:43,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 430 transitions, 6976 flow [2024-06-21 20:56:43,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:56:43,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:56:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 20:56:43,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-21 20:56:43,387 INFO L175 Difference]: Start difference. First operand has 269 places, 392 transitions, 5865 flow. Second operand 9 states and 160 transitions. [2024-06-21 20:56:43,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 430 transitions, 6976 flow [2024-06-21 20:56:44,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 430 transitions, 6803 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 20:56:44,774 INFO L231 Difference]: Finished difference. Result has 271 places, 396 transitions, 5972 flow [2024-06-21 20:56:44,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5692, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5972, PETRI_PLACES=271, PETRI_TRANSITIONS=396} [2024-06-21 20:56:44,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-21 20:56:44,775 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 396 transitions, 5972 flow [2024-06-21 20:56:44,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:44,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:44,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:44,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:56:44,775 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:44,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:44,775 INFO L85 PathProgramCache]: Analyzing trace with hash -786095815, now seen corresponding path program 4 times [2024-06-21 20:56:44,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:44,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216244052] [2024-06-21 20:56:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:44,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:45,887 INFO 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 20:56:45,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:45,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216244052] [2024-06-21 20:56:45,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216244052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:45,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:45,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:56:45,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50917182] [2024-06-21 20:56:45,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:45,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:56:45,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:45,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:56:45,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:56:45,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:45,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 396 transitions, 5972 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:45,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:45,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:45,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:47,682 INFO L124 PetriNetUnfolderBase]: 4960/7487 cut-off events. [2024-06-21 20:56:47,682 INFO L125 PetriNetUnfolderBase]: For 956329/956337 co-relation queries the response was YES. [2024-06-21 20:56:47,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71720 conditions, 7487 events. 4960/7487 cut-off events. For 956329/956337 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 42587 event pairs, 1181 based on Foata normal form. 26/7512 useless extension candidates. Maximal degree in co-relation 71586. Up to 7164 conditions per place. [2024-06-21 20:56:47,763 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 382 selfloop transitions, 46 changer transitions 0/431 dead transitions. [2024-06-21 20:56:47,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 431 transitions, 7050 flow [2024-06-21 20:56:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:56:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:56:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 20:56:47,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 20:56:47,764 INFO L175 Difference]: Start difference. First operand has 271 places, 396 transitions, 5972 flow. Second operand 9 states and 159 transitions. [2024-06-21 20:56:47,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 431 transitions, 7050 flow [2024-06-21 20:56:48,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 431 transitions, 6828 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-21 20:56:48,987 INFO L231 Difference]: Finished difference. Result has 273 places, 398 transitions, 5972 flow [2024-06-21 20:56:48,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5750, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5972, PETRI_PLACES=273, PETRI_TRANSITIONS=398} [2024-06-21 20:56:48,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-21 20:56:48,987 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 398 transitions, 5972 flow [2024-06-21 20:56:48,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:48,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:48,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:48,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:56:48,988 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:48,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:48,988 INFO L85 PathProgramCache]: Analyzing trace with hash -65125739, now seen corresponding path program 5 times [2024-06-21 20:56:48,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:48,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993178326] [2024-06-21 20:56:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:48,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:49,997 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 20:56:49,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993178326] [2024-06-21 20:56:49,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993178326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:49,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:49,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:49,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025388813] [2024-06-21 20:56:49,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:49,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:49,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:49,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:49,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:50,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:50,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 398 transitions, 5972 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:50,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:50,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:50,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:51,855 INFO L124 PetriNetUnfolderBase]: 5021/7590 cut-off events. [2024-06-21 20:56:51,856 INFO L125 PetriNetUnfolderBase]: For 980439/980447 co-relation queries the response was YES. [2024-06-21 20:56:51,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72349 conditions, 7590 events. 5021/7590 cut-off events. For 980439/980447 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 43327 event pairs, 1178 based on Foata normal form. 26/7615 useless extension candidates. Maximal degree in co-relation 72214. Up to 7047 conditions per place. [2024-06-21 20:56:51,954 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 364 selfloop transitions, 67 changer transitions 0/434 dead transitions. [2024-06-21 20:56:51,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 434 transitions, 7059 flow [2024-06-21 20:56:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:56:51,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:56:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 20:56:51,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 20:56:51,955 INFO L175 Difference]: Start difference. First operand has 273 places, 398 transitions, 5972 flow. Second operand 9 states and 161 transitions. [2024-06-21 20:56:51,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 434 transitions, 7059 flow [2024-06-21 20:56:53,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 434 transitions, 6874 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 20:56:53,344 INFO L231 Difference]: Finished difference. Result has 276 places, 400 transitions, 6053 flow [2024-06-21 20:56:53,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6053, PETRI_PLACES=276, PETRI_TRANSITIONS=400} [2024-06-21 20:56:53,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-21 20:56:53,345 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 400 transitions, 6053 flow [2024-06-21 20:56:53,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:53,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:53,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:53,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:56:53,345 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:53,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:53,345 INFO L85 PathProgramCache]: Analyzing trace with hash -65363075, now seen corresponding path program 1 times [2024-06-21 20:56:53,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:53,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621210633] [2024-06-21 20:56:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:53,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:54,472 INFO 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 20:56:54,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:54,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621210633] [2024-06-21 20:56:54,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621210633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:54,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:54,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:56:54,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543426093] [2024-06-21 20:56:54,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:54,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:56:54,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:54,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:56:54,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:56:54,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:54,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 400 transitions, 6053 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:54,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:54,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:54,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:56,287 INFO L124 PetriNetUnfolderBase]: 5021/7590 cut-off events. [2024-06-21 20:56:56,287 INFO L125 PetriNetUnfolderBase]: For 979383/979391 co-relation queries the response was YES. [2024-06-21 20:56:56,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71185 conditions, 7590 events. 5021/7590 cut-off events. For 979383/979391 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 43300 event pairs, 1192 based on Foata normal form. 32/7621 useless extension candidates. Maximal degree in co-relation 71049. Up to 6833 conditions per place. [2024-06-21 20:56:56,397 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 365 selfloop transitions, 68 changer transitions 0/436 dead transitions. [2024-06-21 20:56:56,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 436 transitions, 6984 flow [2024-06-21 20:56:56,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:56:56,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:56:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 20:56:56,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 20:56:56,398 INFO L175 Difference]: Start difference. First operand has 276 places, 400 transitions, 6053 flow. Second operand 9 states and 163 transitions. [2024-06-21 20:56:56,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 436 transitions, 6984 flow [2024-06-21 20:56:58,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 436 transitions, 6752 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 20:56:58,027 INFO L231 Difference]: Finished difference. Result has 277 places, 400 transitions, 5909 flow [2024-06-21 20:56:58,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5719, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5909, PETRI_PLACES=277, PETRI_TRANSITIONS=400} [2024-06-21 20:56:58,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-21 20:56:58,028 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 400 transitions, 5909 flow [2024-06-21 20:56:58,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:58,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:58,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:58,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:56:58,028 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:58,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:58,028 INFO L85 PathProgramCache]: Analyzing trace with hash 811414400, now seen corresponding path program 6 times [2024-06-21 20:56:58,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:58,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439213852] [2024-06-21 20:56:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:58,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:58,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:58,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439213852] [2024-06-21 20:56:58,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439213852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:58,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:58,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:56:58,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094985511] [2024-06-21 20:56:58,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:58,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:56:58,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:58,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:56:58,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:56:58,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:56:58,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 400 transitions, 5909 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:58,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:58,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:56:58,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:00,140 INFO L124 PetriNetUnfolderBase]: 4997/7556 cut-off events. [2024-06-21 20:57:00,140 INFO L125 PetriNetUnfolderBase]: For 932874/932876 co-relation queries the response was YES. [2024-06-21 20:57:00,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70610 conditions, 7556 events. 4997/7556 cut-off events. For 932874/932876 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 43077 event pairs, 1237 based on Foata normal form. 4/7559 useless extension candidates. Maximal degree in co-relation 70473. Up to 7433 conditions per place. [2024-06-21 20:57:00,246 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 365 selfloop transitions, 44 changer transitions 0/412 dead transitions. [2024-06-21 20:57:00,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 412 transitions, 6913 flow [2024-06-21 20:57:00,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:00,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:00,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 20:57:00,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-21 20:57:00,247 INFO L175 Difference]: Start difference. First operand has 277 places, 400 transitions, 5909 flow. Second operand 7 states and 117 transitions. [2024-06-21 20:57:00,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 412 transitions, 6913 flow [2024-06-21 20:57:01,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 412 transitions, 6651 flow, removed 53 selfloop flow, removed 9 redundant places. [2024-06-21 20:57:01,834 INFO L231 Difference]: Finished difference. Result has 275 places, 400 transitions, 5747 flow [2024-06-21 20:57:01,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5651, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5747, PETRI_PLACES=275, PETRI_TRANSITIONS=400} [2024-06-21 20:57:01,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-21 20:57:01,834 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 400 transitions, 5747 flow [2024-06-21 20:57:01,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:01,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:01,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:01,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:57:01,835 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:01,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:01,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1279433914, now seen corresponding path program 7 times [2024-06-21 20:57:01,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:01,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311130515] [2024-06-21 20:57:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:01,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:02,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:02,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311130515] [2024-06-21 20:57:02,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311130515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:02,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:02,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:02,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394540036] [2024-06-21 20:57:02,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:02,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:02,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:02,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:02,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:02,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:57:02,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 400 transitions, 5747 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:02,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:02,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:57:02,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:03,848 INFO L124 PetriNetUnfolderBase]: 4944/7469 cut-off events. [2024-06-21 20:57:03,848 INFO L125 PetriNetUnfolderBase]: For 890632/890634 co-relation queries the response was YES. [2024-06-21 20:57:03,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68415 conditions, 7469 events. 4944/7469 cut-off events. For 890632/890634 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 42459 event pairs, 1229 based on Foata normal form. 3/7471 useless extension candidates. Maximal degree in co-relation 68279. Up to 7399 conditions per place. [2024-06-21 20:57:03,953 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 377 selfloop transitions, 30 changer transitions 0/410 dead transitions. [2024-06-21 20:57:03,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 410 transitions, 6587 flow [2024-06-21 20:57:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:03,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 20:57:03,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-21 20:57:03,953 INFO L175 Difference]: Start difference. First operand has 275 places, 400 transitions, 5747 flow. Second operand 7 states and 111 transitions. [2024-06-21 20:57:03,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 410 transitions, 6587 flow [2024-06-21 20:57:05,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 410 transitions, 6466 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:05,238 INFO L231 Difference]: Finished difference. Result has 276 places, 400 transitions, 5692 flow [2024-06-21 20:57:05,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5626, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5692, PETRI_PLACES=276, PETRI_TRANSITIONS=400} [2024-06-21 20:57:05,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-21 20:57:05,238 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 400 transitions, 5692 flow [2024-06-21 20:57:05,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:05,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:05,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:05,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:57:05,239 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:05,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:05,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1689575806, now seen corresponding path program 1 times [2024-06-21 20:57:05,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:05,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255426182] [2024-06-21 20:57:05,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:05,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:05,883 INFO 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 20:57:05,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:05,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255426182] [2024-06-21 20:57:05,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255426182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:05,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:05,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:05,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253570869] [2024-06-21 20:57:05,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:05,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:05,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:05,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:05,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:05,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:57:05,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 400 transitions, 5692 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:05,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:05,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:57:05,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:07,462 INFO L124 PetriNetUnfolderBase]: 4938/7459 cut-off events. [2024-06-21 20:57:07,462 INFO L125 PetriNetUnfolderBase]: For 907949/907949 co-relation queries the response was YES. [2024-06-21 20:57:07,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68397 conditions, 7459 events. 4938/7459 cut-off events. For 907949/907949 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 42393 event pairs, 1244 based on Foata normal form. 2/7460 useless extension candidates. Maximal degree in co-relation 68260. Up to 7425 conditions per place. [2024-06-21 20:57:07,569 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 396 selfloop transitions, 17 changer transitions 0/416 dead transitions. [2024-06-21 20:57:07,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 416 transitions, 6610 flow [2024-06-21 20:57:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:07,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 20:57:07,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-21 20:57:07,570 INFO L175 Difference]: Start difference. First operand has 276 places, 400 transitions, 5692 flow. Second operand 8 states and 120 transitions. [2024-06-21 20:57:07,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 416 transitions, 6610 flow [2024-06-21 20:57:08,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 416 transitions, 6429 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 20:57:08,892 INFO L231 Difference]: Finished difference. Result has 275 places, 403 transitions, 5617 flow [2024-06-21 20:57:08,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5511, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5617, PETRI_PLACES=275, PETRI_TRANSITIONS=403} [2024-06-21 20:57:08,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-21 20:57:08,893 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 403 transitions, 5617 flow [2024-06-21 20:57:08,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:08,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:08,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:08,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:57:08,893 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:08,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:08,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1291684505, now seen corresponding path program 4 times [2024-06-21 20:57:08,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:08,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149639323] [2024-06-21 20:57:08,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:08,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:09,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:09,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149639323] [2024-06-21 20:57:09,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149639323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:09,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:09,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:09,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802872525] [2024-06-21 20:57:09,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:09,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:09,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:09,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:09,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:09,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:57:09,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 403 transitions, 5617 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:09,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:09,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:57:09,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:11,064 INFO L124 PetriNetUnfolderBase]: 5094/7677 cut-off events. [2024-06-21 20:57:11,064 INFO L125 PetriNetUnfolderBase]: For 974431/974433 co-relation queries the response was YES. [2024-06-21 20:57:11,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70991 conditions, 7677 events. 5094/7677 cut-off events. For 974431/974433 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 43670 event pairs, 1225 based on Foata normal form. 14/7690 useless extension candidates. Maximal degree in co-relation 70853. Up to 7259 conditions per place. [2024-06-21 20:57:11,172 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 374 selfloop transitions, 68 changer transitions 0/445 dead transitions. [2024-06-21 20:57:11,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 445 transitions, 7365 flow [2024-06-21 20:57:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:57:11,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 20:57:11,173 INFO L175 Difference]: Start difference. First operand has 275 places, 403 transitions, 5617 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:57:11,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 445 transitions, 7365 flow [2024-06-21 20:57:12,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 445 transitions, 7275 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:12,719 INFO L231 Difference]: Finished difference. Result has 279 places, 422 transitions, 6077 flow [2024-06-21 20:57:12,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5527, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6077, PETRI_PLACES=279, PETRI_TRANSITIONS=422} [2024-06-21 20:57:12,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-21 20:57:12,720 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 422 transitions, 6077 flow [2024-06-21 20:57:12,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:12,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:12,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:12,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:57:12,720 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:12,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:12,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1689129933, now seen corresponding path program 5 times [2024-06-21 20:57:12,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:12,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333533677] [2024-06-21 20:57:12,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:12,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:13,306 INFO 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 20:57:13,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:13,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333533677] [2024-06-21 20:57:13,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333533677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:13,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:13,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:13,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851557451] [2024-06-21 20:57:13,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:13,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:13,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:13,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:13,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:13,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:57:13,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 422 transitions, 6077 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:13,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:13,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:57:13,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:14,959 INFO L124 PetriNetUnfolderBase]: 5268/7920 cut-off events. [2024-06-21 20:57:14,959 INFO L125 PetriNetUnfolderBase]: For 1040464/1040466 co-relation queries the response was YES. [2024-06-21 20:57:15,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75223 conditions, 7920 events. 5268/7920 cut-off events. For 1040464/1040466 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 45179 event pairs, 1301 based on Foata normal form. 14/7933 useless extension candidates. Maximal degree in co-relation 75082. Up to 7660 conditions per place. [2024-06-21 20:57:15,070 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 399 selfloop transitions, 49 changer transitions 0/451 dead transitions. [2024-06-21 20:57:15,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 451 transitions, 7588 flow [2024-06-21 20:57:15,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 20:57:15,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 20:57:15,070 INFO L175 Difference]: Start difference. First operand has 279 places, 422 transitions, 6077 flow. Second operand 8 states and 139 transitions. [2024-06-21 20:57:15,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 451 transitions, 7588 flow [2024-06-21 20:57:17,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 451 transitions, 7358 flow, removed 102 selfloop flow, removed 2 redundant places. [2024-06-21 20:57:17,089 INFO L231 Difference]: Finished difference. Result has 286 places, 432 transitions, 6237 flow [2024-06-21 20:57:17,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5909, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6237, PETRI_PLACES=286, PETRI_TRANSITIONS=432} [2024-06-21 20:57:17,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-21 20:57:17,089 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 432 transitions, 6237 flow [2024-06-21 20:57:17,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:17,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:17,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:17,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:57:17,090 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:17,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:17,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1676242923, now seen corresponding path program 6 times [2024-06-21 20:57:17,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:17,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848011528] [2024-06-21 20:57:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:17,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:17,706 INFO 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 20:57:17,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:17,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848011528] [2024-06-21 20:57:17,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848011528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:17,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:17,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:17,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219944517] [2024-06-21 20:57:17,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:17,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:17,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:17,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:17,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:17,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:57:17,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 432 transitions, 6237 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:17,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:17,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:57:17,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:19,607 INFO L124 PetriNetUnfolderBase]: 5250/7899 cut-off events. [2024-06-21 20:57:19,607 INFO L125 PetriNetUnfolderBase]: For 1024269/1024271 co-relation queries the response was YES. [2024-06-21 20:57:19,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73535 conditions, 7899 events. 5250/7899 cut-off events. For 1024269/1024271 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45084 event pairs, 1270 based on Foata normal form. 14/7912 useless extension candidates. Maximal degree in co-relation 73391. Up to 7365 conditions per place. [2024-06-21 20:57:19,702 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 379 selfloop transitions, 73 changer transitions 0/455 dead transitions. [2024-06-21 20:57:19,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 455 transitions, 7679 flow [2024-06-21 20:57:19,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:19,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:19,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:57:19,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 20:57:19,703 INFO L175 Difference]: Start difference. First operand has 286 places, 432 transitions, 6237 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:57:19,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 455 transitions, 7679 flow [2024-06-21 20:57:21,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 455 transitions, 7475 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:21,091 INFO L231 Difference]: Finished difference. Result has 289 places, 432 transitions, 6188 flow [2024-06-21 20:57:21,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6033, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6188, PETRI_PLACES=289, PETRI_TRANSITIONS=432} [2024-06-21 20:57:21,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-21 20:57:21,092 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 432 transitions, 6188 flow [2024-06-21 20:57:21,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:21,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:21,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:21,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:57:21,093 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:21,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:21,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1676231422, now seen corresponding path program 4 times [2024-06-21 20:57:21,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:21,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186972750] [2024-06-21 20:57:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:21,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:21,820 INFO 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 20:57:21,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:21,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186972750] [2024-06-21 20:57:21,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186972750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:21,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:21,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:21,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154777808] [2024-06-21 20:57:21,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:21,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:21,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:21,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:21,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:21,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:57:21,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 432 transitions, 6188 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:21,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:21,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:57:21,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:23,671 INFO L124 PetriNetUnfolderBase]: 5221/7854 cut-off events. [2024-06-21 20:57:23,671 INFO L125 PetriNetUnfolderBase]: For 1013314/1013316 co-relation queries the response was YES. [2024-06-21 20:57:23,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72563 conditions, 7854 events. 5221/7854 cut-off events. For 1013314/1013316 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 44763 event pairs, 1299 based on Foata normal form. 6/7859 useless extension candidates. Maximal degree in co-relation 72418. Up to 7719 conditions per place. [2024-06-21 20:57:23,780 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 391 selfloop transitions, 52 changer transitions 0/446 dead transitions. [2024-06-21 20:57:23,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 446 transitions, 7120 flow [2024-06-21 20:57:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 20:57:23,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-21 20:57:23,782 INFO L175 Difference]: Start difference. First operand has 289 places, 432 transitions, 6188 flow. Second operand 8 states and 133 transitions. [2024-06-21 20:57:23,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 446 transitions, 7120 flow [2024-06-21 20:57:25,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 446 transitions, 6826 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 20:57:25,253 INFO L231 Difference]: Finished difference. Result has 289 places, 432 transitions, 6006 flow [2024-06-21 20:57:25,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5894, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6006, PETRI_PLACES=289, PETRI_TRANSITIONS=432} [2024-06-21 20:57:25,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-21 20:57:25,253 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 432 transitions, 6006 flow [2024-06-21 20:57:25,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:25,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:25,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:25,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:57:25,254 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:25,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:25,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1027280697, now seen corresponding path program 1 times [2024-06-21 20:57:25,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:25,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759182696] [2024-06-21 20:57:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:25,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:25,764 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 20:57:25,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:25,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759182696] [2024-06-21 20:57:25,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759182696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:25,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:25,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:25,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395583101] [2024-06-21 20:57:25,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:25,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:25,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:25,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:25,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:25,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:57:25,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 432 transitions, 6006 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:25,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:25,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:57:25,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:27,644 INFO L124 PetriNetUnfolderBase]: 5251/7895 cut-off events. [2024-06-21 20:57:27,644 INFO L125 PetriNetUnfolderBase]: For 1040076/1040080 co-relation queries the response was YES. [2024-06-21 20:57:27,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72021 conditions, 7895 events. 5251/7895 cut-off events. For 1040076/1040080 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 44977 event pairs, 1309 based on Foata normal form. 10/7904 useless extension candidates. Maximal degree in co-relation 71877. Up to 7660 conditions per place. [2024-06-21 20:57:27,737 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 408 selfloop transitions, 54 changer transitions 0/465 dead transitions. [2024-06-21 20:57:27,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 465 transitions, 7251 flow [2024-06-21 20:57:27,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:27,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 20:57:27,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-21 20:57:27,738 INFO L175 Difference]: Start difference. First operand has 289 places, 432 transitions, 6006 flow. Second operand 7 states and 131 transitions. [2024-06-21 20:57:27,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 465 transitions, 7251 flow [2024-06-21 20:57:29,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 465 transitions, 7107 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:29,441 INFO L231 Difference]: Finished difference. Result has 290 places, 436 transitions, 6037 flow [2024-06-21 20:57:29,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5862, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6037, PETRI_PLACES=290, PETRI_TRANSITIONS=436} [2024-06-21 20:57:29,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-21 20:57:29,441 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 436 transitions, 6037 flow [2024-06-21 20:57:29,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:29,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:29,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:29,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:57:29,442 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:29,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:29,442 INFO L85 PathProgramCache]: Analyzing trace with hash -870762547, now seen corresponding path program 2 times [2024-06-21 20:57:29,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:29,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133896526] [2024-06-21 20:57:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:29,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:30,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:30,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133896526] [2024-06-21 20:57:30,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133896526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:30,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:30,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:30,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183907480] [2024-06-21 20:57:30,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:30,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:30,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:30,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:30,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:30,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:57:30,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 436 transitions, 6037 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:30,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:30,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:57:30,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:32,059 INFO L124 PetriNetUnfolderBase]: 5281/7938 cut-off events. [2024-06-21 20:57:32,059 INFO L125 PetriNetUnfolderBase]: For 1064850/1064850 co-relation queries the response was YES. [2024-06-21 20:57:32,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72556 conditions, 7938 events. 5281/7938 cut-off events. For 1064850/1064850 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45228 event pairs, 1311 based on Foata normal form. 6/7943 useless extension candidates. Maximal degree in co-relation 72411. Up to 7682 conditions per place. [2024-06-21 20:57:32,158 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 412 selfloop transitions, 53 changer transitions 0/468 dead transitions. [2024-06-21 20:57:32,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 468 transitions, 7298 flow [2024-06-21 20:57:32,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:32,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 20:57:32,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 20:57:32,159 INFO L175 Difference]: Start difference. First operand has 290 places, 436 transitions, 6037 flow. Second operand 8 states and 141 transitions. [2024-06-21 20:57:32,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 468 transitions, 7298 flow [2024-06-21 20:57:33,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 468 transitions, 7122 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:33,452 INFO L231 Difference]: Finished difference. Result has 292 places, 440 transitions, 6041 flow [2024-06-21 20:57:33,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5873, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6041, PETRI_PLACES=292, PETRI_TRANSITIONS=440} [2024-06-21 20:57:33,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-21 20:57:33,452 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 440 transitions, 6041 flow [2024-06-21 20:57:33,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:33,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:33,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:33,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:57:33,453 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:33,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash 824493641, now seen corresponding path program 3 times [2024-06-21 20:57:33,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:33,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353312765] [2024-06-21 20:57:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:33,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:34,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:34,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353312765] [2024-06-21 20:57:34,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353312765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:34,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:34,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:34,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644357103] [2024-06-21 20:57:34,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:34,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:34,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:34,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:34,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:34,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:57:34,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 440 transitions, 6041 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:34,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:34,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:57:34,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:36,133 INFO L124 PetriNetUnfolderBase]: 5311/7981 cut-off events. [2024-06-21 20:57:36,133 INFO L125 PetriNetUnfolderBase]: For 1088357/1088357 co-relation queries the response was YES. [2024-06-21 20:57:36,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73051 conditions, 7981 events. 5311/7981 cut-off events. For 1088357/1088357 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 45437 event pairs, 1304 based on Foata normal form. 6/7986 useless extension candidates. Maximal degree in co-relation 72906. Up to 7704 conditions per place. [2024-06-21 20:57:36,240 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 409 selfloop transitions, 63 changer transitions 0/475 dead transitions. [2024-06-21 20:57:36,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 475 transitions, 7334 flow [2024-06-21 20:57:36,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:57:36,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:57:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 20:57:36,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-21 20:57:36,241 INFO L175 Difference]: Start difference. First operand has 292 places, 440 transitions, 6041 flow. Second operand 9 states and 154 transitions. [2024-06-21 20:57:36,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 475 transitions, 7334 flow [2024-06-21 20:57:37,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 475 transitions, 7233 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:37,874 INFO L231 Difference]: Finished difference. Result has 296 places, 444 transitions, 6136 flow [2024-06-21 20:57:37,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5944, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6136, PETRI_PLACES=296, PETRI_TRANSITIONS=444} [2024-06-21 20:57:37,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-21 20:57:37,875 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 444 transitions, 6136 flow [2024-06-21 20:57:37,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:37,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:37,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:37,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:57:37,876 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:37,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:37,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1450961861, now seen corresponding path program 4 times [2024-06-21 20:57:37,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:37,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016469914] [2024-06-21 20:57:37,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:37,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:38,481 INFO 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 20:57:38,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:38,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016469914] [2024-06-21 20:57:38,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016469914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:38,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:38,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:38,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136431016] [2024-06-21 20:57:38,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:38,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:38,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:38,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:38,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:38,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:57:38,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 444 transitions, 6136 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:38,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:38,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:57:38,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:40,462 INFO L124 PetriNetUnfolderBase]: 5293/7957 cut-off events. [2024-06-21 20:57:40,462 INFO L125 PetriNetUnfolderBase]: For 1092292/1092292 co-relation queries the response was YES. [2024-06-21 20:57:40,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72696 conditions, 7957 events. 5293/7957 cut-off events. For 1092292/1092292 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45300 event pairs, 1313 based on Foata normal form. 6/7962 useless extension candidates. Maximal degree in co-relation 72550. Up to 7693 conditions per place. [2024-06-21 20:57:40,556 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 60 changer transitions 0/470 dead transitions. [2024-06-21 20:57:40,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 470 transitions, 7172 flow [2024-06-21 20:57:40,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:40,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 20:57:40,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 20:57:40,557 INFO L175 Difference]: Start difference. First operand has 296 places, 444 transitions, 6136 flow. Second operand 8 states and 139 transitions. [2024-06-21 20:57:40,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 470 transitions, 7172 flow [2024-06-21 20:57:42,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 470 transitions, 6982 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 20:57:42,477 INFO L231 Difference]: Finished difference. Result has 297 places, 444 transitions, 6074 flow [2024-06-21 20:57:42,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5946, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6074, PETRI_PLACES=297, PETRI_TRANSITIONS=444} [2024-06-21 20:57:42,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-21 20:57:42,478 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 444 transitions, 6074 flow [2024-06-21 20:57:42,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:42,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:42,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:42,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:57:42,478 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:42,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:42,479 INFO L85 PathProgramCache]: Analyzing trace with hash -710422050, now seen corresponding path program 1 times [2024-06-21 20:57:42,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:42,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527609394] [2024-06-21 20:57:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:42,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:43,452 INFO 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 20:57:43,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:43,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527609394] [2024-06-21 20:57:43,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527609394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:43,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:43,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:57:43,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931177897] [2024-06-21 20:57:43,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:43,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:57:43,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:43,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:57:43,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:57:43,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:57:43,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 444 transitions, 6074 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:43,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:43,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:57:43,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:45,407 INFO L124 PetriNetUnfolderBase]: 5288/7947 cut-off events. [2024-06-21 20:57:45,407 INFO L125 PetriNetUnfolderBase]: For 1094636/1094636 co-relation queries the response was YES. [2024-06-21 20:57:45,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72621 conditions, 7947 events. 5288/7947 cut-off events. For 1094636/1094636 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 45150 event pairs, 1322 based on Foata normal form. 2/7948 useless extension candidates. Maximal degree in co-relation 72474. Up to 7915 conditions per place. [2024-06-21 20:57:45,521 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 440 selfloop transitions, 16 changer transitions 0/459 dead transitions. [2024-06-21 20:57:45,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 459 transitions, 7054 flow [2024-06-21 20:57:45,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-21 20:57:45,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-21 20:57:45,522 INFO L175 Difference]: Start difference. First operand has 297 places, 444 transitions, 6074 flow. Second operand 8 states and 119 transitions. [2024-06-21 20:57:45,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 459 transitions, 7054 flow [2024-06-21 20:57:47,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 459 transitions, 6895 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 20:57:47,270 INFO L231 Difference]: Finished difference. Result has 297 places, 446 transitions, 5992 flow [2024-06-21 20:57:47,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5915, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5992, PETRI_PLACES=297, PETRI_TRANSITIONS=446} [2024-06-21 20:57:47,271 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-21 20:57:47,271 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 446 transitions, 5992 flow [2024-06-21 20:57:47,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:47,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:47,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:47,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:57:47,271 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:47,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:47,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1796847038, now seen corresponding path program 1 times [2024-06-21 20:57:47,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:47,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243197898] [2024-06-21 20:57:47,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:47,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:48,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:48,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243197898] [2024-06-21 20:57:48,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243197898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:48,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:48,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:57:48,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362457517] [2024-06-21 20:57:48,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:48,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:57:48,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:48,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:57:48,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:57:48,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:57:48,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 446 transitions, 5992 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:48,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:48,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:57:48,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:50,272 INFO L124 PetriNetUnfolderBase]: 5556/8382 cut-off events. [2024-06-21 20:57:50,272 INFO L125 PetriNetUnfolderBase]: For 1237670/1237670 co-relation queries the response was YES. [2024-06-21 20:57:50,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76729 conditions, 8382 events. 5556/8382 cut-off events. For 1237670/1237670 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 48298 event pairs, 1045 based on Foata normal form. 22/8403 useless extension candidates. Maximal degree in co-relation 76581. Up to 6388 conditions per place. [2024-06-21 20:57:50,376 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 341 selfloop transitions, 162 changer transitions 0/506 dead transitions. [2024-06-21 20:57:50,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 506 transitions, 8103 flow [2024-06-21 20:57:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:57:50,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:57:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 20:57:50,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-21 20:57:50,377 INFO L175 Difference]: Start difference. First operand has 297 places, 446 transitions, 5992 flow. Second operand 9 states and 183 transitions. [2024-06-21 20:57:50,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 506 transitions, 8103 flow [2024-06-21 20:57:52,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 506 transitions, 8042 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:52,475 INFO L231 Difference]: Finished difference. Result has 301 places, 456 transitions, 6559 flow [2024-06-21 20:57:52,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5931, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6559, PETRI_PLACES=301, PETRI_TRANSITIONS=456} [2024-06-21 20:57:52,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-21 20:57:52,476 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 456 transitions, 6559 flow [2024-06-21 20:57:52,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:52,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:52,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:52,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:57:52,476 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:52,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:52,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1800514006, now seen corresponding path program 1 times [2024-06-21 20:57:52,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:52,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826751609] [2024-06-21 20:57:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:52,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:53,355 INFO 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 20:57:53,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:53,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826751609] [2024-06-21 20:57:53,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826751609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:53,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:53,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:57:53,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822386410] [2024-06-21 20:57:53,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:53,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:57:53,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:53,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:57:53,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:57:53,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:57:53,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 456 transitions, 6559 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:53,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:53,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:57:53,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:55,389 INFO L124 PetriNetUnfolderBase]: 5600/8443 cut-off events. [2024-06-21 20:57:55,389 INFO L125 PetriNetUnfolderBase]: For 1223952/1223952 co-relation queries the response was YES. [2024-06-21 20:57:55,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79079 conditions, 8443 events. 5600/8443 cut-off events. For 1223952/1223952 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 48914 event pairs, 1172 based on Foata normal form. 4/8446 useless extension candidates. Maximal degree in co-relation 78929. Up to 7049 conditions per place. [2024-06-21 20:57:55,488 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 385 selfloop transitions, 180 changer transitions 0/568 dead transitions. [2024-06-21 20:57:55,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 568 transitions, 9240 flow [2024-06-21 20:57:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:57:55,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:57:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 20:57:55,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823848238482385 [2024-06-21 20:57:55,489 INFO L175 Difference]: Start difference. First operand has 301 places, 456 transitions, 6559 flow. Second operand 9 states and 178 transitions. [2024-06-21 20:57:55,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 568 transitions, 9240 flow [2024-06-21 20:57:56,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 568 transitions, 8969 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:56,953 INFO L231 Difference]: Finished difference. Result has 307 places, 517 transitions, 7737 flow [2024-06-21 20:57:56,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6288, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7737, PETRI_PLACES=307, PETRI_TRANSITIONS=517} [2024-06-21 20:57:56,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-21 20:57:56,954 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 517 transitions, 7737 flow [2024-06-21 20:57:56,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:56,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:56,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:56,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:57:56,954 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:56,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:56,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1797086048, now seen corresponding path program 2 times [2024-06-21 20:57:56,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:56,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962849509] [2024-06-21 20:57:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:56,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:57,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:57,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962849509] [2024-06-21 20:57:57,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962849509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:57,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:57,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:57:57,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323482652] [2024-06-21 20:57:57,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:57,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:57:57,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:57,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:57:57,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:57:57,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:57:57,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 517 transitions, 7737 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:57,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:57,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:57:57,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:00,177 INFO L124 PetriNetUnfolderBase]: 5680/8567 cut-off events. [2024-06-21 20:58:00,177 INFO L125 PetriNetUnfolderBase]: For 1327713/1327713 co-relation queries the response was YES. [2024-06-21 20:58:00,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82829 conditions, 8567 events. 5680/8567 cut-off events. For 1327713/1327713 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 49701 event pairs, 1199 based on Foata normal form. 22/8588 useless extension candidates. Maximal degree in co-relation 82675. Up to 7626 conditions per place. [2024-06-21 20:58:00,280 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 407 selfloop transitions, 153 changer transitions 0/563 dead transitions. [2024-06-21 20:58:00,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 563 transitions, 9643 flow [2024-06-21 20:58:00,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:00,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 20:58:00,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-21 20:58:00,281 INFO L175 Difference]: Start difference. First operand has 307 places, 517 transitions, 7737 flow. Second operand 9 states and 176 transitions. [2024-06-21 20:58:00,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 563 transitions, 9643 flow [2024-06-21 20:58:01,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 563 transitions, 9520 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-21 20:58:01,919 INFO L231 Difference]: Finished difference. Result has 314 places, 521 transitions, 8052 flow [2024-06-21 20:58:01,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7614, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8052, PETRI_PLACES=314, PETRI_TRANSITIONS=521} [2024-06-21 20:58:01,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-21 20:58:01,920 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 521 transitions, 8052 flow [2024-06-21 20:58:01,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:01,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:01,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:01,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:58:01,921 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:01,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:01,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1800802306, now seen corresponding path program 2 times [2024-06-21 20:58:01,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:01,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357908077] [2024-06-21 20:58:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:01,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:02,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:02,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357908077] [2024-06-21 20:58:02,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357908077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:02,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:02,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:02,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093517098] [2024-06-21 20:58:02,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:02,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:02,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:02,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:02,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:02,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:58:02,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 521 transitions, 8052 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:02,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:02,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:58:02,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:04,942 INFO L124 PetriNetUnfolderBase]: 5758/8675 cut-off events. [2024-06-21 20:58:04,942 INFO L125 PetriNetUnfolderBase]: For 1319283/1319283 co-relation queries the response was YES. [2024-06-21 20:58:05,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85216 conditions, 8675 events. 5758/8675 cut-off events. For 1319283/1319283 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 50455 event pairs, 1183 based on Foata normal form. 4/8678 useless extension candidates. Maximal degree in co-relation 85059. Up to 7569 conditions per place. [2024-06-21 20:58:05,046 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 415 selfloop transitions, 167 changer transitions 0/585 dead transitions. [2024-06-21 20:58:05,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 585 transitions, 10456 flow [2024-06-21 20:58:05,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:58:05,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-21 20:58:05,047 INFO L175 Difference]: Start difference. First operand has 314 places, 521 transitions, 8052 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:58:05,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 585 transitions, 10456 flow [2024-06-21 20:58:07,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 585 transitions, 10160 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:07,759 INFO L231 Difference]: Finished difference. Result has 319 places, 540 transitions, 8480 flow [2024-06-21 20:58:07,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7768, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8480, PETRI_PLACES=319, PETRI_TRANSITIONS=540} [2024-06-21 20:58:07,760 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-21 20:58:07,760 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 540 transitions, 8480 flow [2024-06-21 20:58:07,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:07,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:07,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:07,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:58:07,761 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:07,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:07,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1901311502, now seen corresponding path program 3 times [2024-06-21 20:58:07,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:07,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413492494] [2024-06-21 20:58:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:07,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:08,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:08,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413492494] [2024-06-21 20:58:08,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413492494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:08,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:08,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:08,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091004967] [2024-06-21 20:58:08,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:08,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:08,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:08,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:08,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:08,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:58:08,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 540 transitions, 8480 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:08,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:08,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:58:08,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:11,047 INFO L124 PetriNetUnfolderBase]: 5748/8662 cut-off events. [2024-06-21 20:58:11,047 INFO L125 PetriNetUnfolderBase]: For 1331601/1331601 co-relation queries the response was YES. [2024-06-21 20:58:11,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85031 conditions, 8662 events. 5748/8662 cut-off events. For 1331601/1331601 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 50435 event pairs, 1192 based on Foata normal form. 4/8665 useless extension candidates. Maximal degree in co-relation 84871. Up to 7597 conditions per place. [2024-06-21 20:58:11,173 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 426 selfloop transitions, 156 changer transitions 0/585 dead transitions. [2024-06-21 20:58:11,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 585 transitions, 10564 flow [2024-06-21 20:58:11,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:11,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:11,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:58:11,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:58:11,174 INFO L175 Difference]: Start difference. First operand has 319 places, 540 transitions, 8480 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:58:11,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 585 transitions, 10564 flow [2024-06-21 20:58:14,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 585 transitions, 10189 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-21 20:58:14,288 INFO L231 Difference]: Finished difference. Result has 324 places, 541 transitions, 8456 flow [2024-06-21 20:58:14,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8105, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8456, PETRI_PLACES=324, PETRI_TRANSITIONS=541} [2024-06-21 20:58:14,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-21 20:58:14,289 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 541 transitions, 8456 flow [2024-06-21 20:58:14,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:14,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:14,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:14,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:58:14,290 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:14,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:14,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1805417918, now seen corresponding path program 3 times [2024-06-21 20:58:14,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:14,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822569873] [2024-06-21 20:58:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:14,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:15,233 INFO 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 20:58:15,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:15,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822569873] [2024-06-21 20:58:15,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822569873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:15,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:15,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:58:15,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412874684] [2024-06-21 20:58:15,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:15,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:58:15,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:15,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:58:15,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:58:15,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:58:15,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 541 transitions, 8456 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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 20:58:15,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:15,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:58:15,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:17,602 INFO L124 PetriNetUnfolderBase]: 5828/8785 cut-off events. [2024-06-21 20:58:17,602 INFO L125 PetriNetUnfolderBase]: For 1433562/1433564 co-relation queries the response was YES. [2024-06-21 20:58:17,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86883 conditions, 8785 events. 5828/8785 cut-off events. For 1433562/1433564 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 51227 event pairs, 1221 based on Foata normal form. 24/8808 useless extension candidates. Maximal degree in co-relation 86721. Up to 8108 conditions per place. [2024-06-21 20:58:17,710 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 469 selfloop transitions, 107 changer transitions 0/579 dead transitions. [2024-06-21 20:58:17,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 579 transitions, 9885 flow [2024-06-21 20:58:17,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:17,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 20:58:17,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 20:58:17,711 INFO L175 Difference]: Start difference. First operand has 324 places, 541 transitions, 8456 flow. Second operand 9 states and 166 transitions. [2024-06-21 20:58:17,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 579 transitions, 9885 flow [2024-06-21 20:58:19,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 579 transitions, 9534 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:19,994 INFO L231 Difference]: Finished difference. Result has 327 places, 545 transitions, 8461 flow [2024-06-21 20:58:19,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8105, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8461, PETRI_PLACES=327, PETRI_TRANSITIONS=545} [2024-06-21 20:58:19,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-21 20:58:19,994 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 545 transitions, 8461 flow [2024-06-21 20:58:19,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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 20:58:19,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:19,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:19,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:58:19,995 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:19,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:19,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1915297046, now seen corresponding path program 1 times [2024-06-21 20:58:19,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:19,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289886528] [2024-06-21 20:58:19,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:19,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:20,695 INFO 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 20:58:20,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:20,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289886528] [2024-06-21 20:58:20,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289886528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:20,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:20,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:20,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297939323] [2024-06-21 20:58:20,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:20,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:20,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:20,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:20,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:20,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:58:20,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 545 transitions, 8461 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:20,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:20,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:58:20,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:23,125 INFO L124 PetriNetUnfolderBase]: 6761/10102 cut-off events. [2024-06-21 20:58:23,125 INFO L125 PetriNetUnfolderBase]: For 1652751/1652753 co-relation queries the response was YES. [2024-06-21 20:58:23,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101647 conditions, 10102 events. 6761/10102 cut-off events. For 1652751/1652753 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 59094 event pairs, 1541 based on Foata normal form. 20/10121 useless extension candidates. Maximal degree in co-relation 101484. Up to 8344 conditions per place. [2024-06-21 20:58:23,272 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 526 selfloop transitions, 169 changer transitions 0/698 dead transitions. [2024-06-21 20:58:23,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 698 transitions, 12560 flow [2024-06-21 20:58:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 20:58:23,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 20:58:23,273 INFO L175 Difference]: Start difference. First operand has 327 places, 545 transitions, 8461 flow. Second operand 9 states and 163 transitions. [2024-06-21 20:58:23,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 698 transitions, 12560 flow [2024-06-21 20:58:26,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 698 transitions, 12230 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:26,771 INFO L231 Difference]: Finished difference. Result has 333 places, 635 transitions, 10527 flow [2024-06-21 20:58:26,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8204, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10527, PETRI_PLACES=333, PETRI_TRANSITIONS=635} [2024-06-21 20:58:26,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-21 20:58:26,772 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 635 transitions, 10527 flow [2024-06-21 20:58:26,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:26,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:26,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:26,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:58:26,772 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:26,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:26,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2092665716, now seen corresponding path program 2 times [2024-06-21 20:58:26,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:26,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474999704] [2024-06-21 20:58:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:26,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:27,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:27,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474999704] [2024-06-21 20:58:27,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474999704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:27,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:27,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:27,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776143096] [2024-06-21 20:58:27,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:27,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:27,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:27,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:27,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:27,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:58:27,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 635 transitions, 10527 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:27,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:27,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:58:27,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:30,502 INFO L124 PetriNetUnfolderBase]: 6821/10185 cut-off events. [2024-06-21 20:58:30,502 INFO L125 PetriNetUnfolderBase]: For 1667614/1667616 co-relation queries the response was YES. [2024-06-21 20:58:30,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104218 conditions, 10185 events. 6821/10185 cut-off events. For 1667614/1667616 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 59625 event pairs, 1359 based on Foata normal form. 14/10198 useless extension candidates. Maximal degree in co-relation 104050. Up to 7666 conditions per place. [2024-06-21 20:58:30,636 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 440 selfloop transitions, 233 changer transitions 0/676 dead transitions. [2024-06-21 20:58:30,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 676 transitions, 12635 flow [2024-06-21 20:58:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 20:58:30,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-21 20:58:30,637 INFO L175 Difference]: Start difference. First operand has 333 places, 635 transitions, 10527 flow. Second operand 8 states and 151 transitions. [2024-06-21 20:58:30,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 676 transitions, 12635 flow [2024-06-21 20:58:33,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 676 transitions, 12527 flow, removed 53 selfloop flow, removed 1 redundant places. [2024-06-21 20:58:33,572 INFO L231 Difference]: Finished difference. Result has 340 places, 646 transitions, 11191 flow [2024-06-21 20:58:33,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10425, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11191, PETRI_PLACES=340, PETRI_TRANSITIONS=646} [2024-06-21 20:58:33,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-21 20:58:33,573 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 646 transitions, 11191 flow [2024-06-21 20:58:33,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:33,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:33,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:33,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:58:33,574 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:33,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:33,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1919938676, now seen corresponding path program 3 times [2024-06-21 20:58:33,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:33,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099059553] [2024-06-21 20:58:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:33,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:34,355 INFO 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 20:58:34,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:34,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099059553] [2024-06-21 20:58:34,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099059553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:34,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:34,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:34,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378869945] [2024-06-21 20:58:34,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:34,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:34,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:34,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:34,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:34,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:58:34,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 646 transitions, 11191 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:34,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:34,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:58:34,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:37,346 INFO L124 PetriNetUnfolderBase]: 6803/10162 cut-off events. [2024-06-21 20:58:37,346 INFO L125 PetriNetUnfolderBase]: For 1658352/1658354 co-relation queries the response was YES. [2024-06-21 20:58:37,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105081 conditions, 10162 events. 6803/10162 cut-off events. For 1658352/1658354 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 59450 event pairs, 1523 based on Foata normal form. 8/10169 useless extension candidates. Maximal degree in co-relation 104910. Up to 8391 conditions per place. [2024-06-21 20:58:37,623 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 530 selfloop transitions, 173 changer transitions 0/706 dead transitions. [2024-06-21 20:58:37,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 706 transitions, 13652 flow [2024-06-21 20:58:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:37,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:37,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 20:58:37,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 20:58:37,637 INFO L175 Difference]: Start difference. First operand has 340 places, 646 transitions, 11191 flow. Second operand 9 states and 159 transitions. [2024-06-21 20:58:37,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 706 transitions, 13652 flow [2024-06-21 20:58:41,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 706 transitions, 13276 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:41,111 INFO L231 Difference]: Finished difference. Result has 348 places, 661 transitions, 11613 flow [2024-06-21 20:58:41,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10836, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11613, PETRI_PLACES=348, PETRI_TRANSITIONS=661} [2024-06-21 20:58:41,111 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-21 20:58:41,112 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 661 transitions, 11613 flow [2024-06-21 20:58:41,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:41,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:41,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:41,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:58:41,112 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:41,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:41,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2092661748, now seen corresponding path program 4 times [2024-06-21 20:58:41,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:41,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846676641] [2024-06-21 20:58:41,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:41,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:42,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:42,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846676641] [2024-06-21 20:58:42,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846676641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:42,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:42,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:58:42,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21057365] [2024-06-21 20:58:42,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:42,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:58:42,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:42,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:58:42,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:58:42,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:58:42,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 661 transitions, 11613 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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 20:58:42,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:42,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:58:42,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:45,322 INFO L124 PetriNetUnfolderBase]: 6881/10272 cut-off events. [2024-06-21 20:58:45,322 INFO L125 PetriNetUnfolderBase]: For 1724145/1724147 co-relation queries the response was YES. [2024-06-21 20:58:45,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106644 conditions, 10272 events. 6881/10272 cut-off events. For 1724145/1724147 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 60216 event pairs, 1346 based on Foata normal form. 14/10285 useless extension candidates. Maximal degree in co-relation 106469. Up to 7674 conditions per place. [2024-06-21 20:58:45,472 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 446 selfloop transitions, 255 changer transitions 0/704 dead transitions. [2024-06-21 20:58:45,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 704 transitions, 13692 flow [2024-06-21 20:58:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:58:45,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 20:58:45,474 INFO L175 Difference]: Start difference. First operand has 348 places, 661 transitions, 11613 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:58:45,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 704 transitions, 13692 flow [2024-06-21 20:58:48,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 704 transitions, 13596 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 20:58:48,412 INFO L231 Difference]: Finished difference. Result has 354 places, 670 transitions, 12222 flow [2024-06-21 20:58:48,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11517, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12222, PETRI_PLACES=354, PETRI_TRANSITIONS=670} [2024-06-21 20:58:48,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-21 20:58:48,413 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 670 transitions, 12222 flow [2024-06-21 20:58:48,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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 20:58:48,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:48,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:48,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:58:48,413 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:48,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:48,414 INFO L85 PathProgramCache]: Analyzing trace with hash 2092315788, now seen corresponding path program 5 times [2024-06-21 20:58:48,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:48,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464406021] [2024-06-21 20:58:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:48,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:49,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:49,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464406021] [2024-06-21 20:58:49,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464406021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:49,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:49,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:49,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854149723] [2024-06-21 20:58:49,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:49,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:49,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:49,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:49,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:49,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:58:49,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 670 transitions, 12222 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:49,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:49,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:58:49,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:52,513 INFO L124 PetriNetUnfolderBase]: 6941/10356 cut-off events. [2024-06-21 20:58:52,513 INFO L125 PetriNetUnfolderBase]: For 1771099/1771101 co-relation queries the response was YES. [2024-06-21 20:58:52,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110104 conditions, 10356 events. 6941/10356 cut-off events. For 1771099/1771101 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 60722 event pairs, 1343 based on Foata normal form. 14/10369 useless extension candidates. Maximal degree in co-relation 109927. Up to 7782 conditions per place. [2024-06-21 20:58:52,679 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 451 selfloop transitions, 260 changer transitions 0/714 dead transitions. [2024-06-21 20:58:52,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 714 transitions, 14345 flow [2024-06-21 20:58:52,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:58:52,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-21 20:58:52,680 INFO L175 Difference]: Start difference. First operand has 354 places, 670 transitions, 12222 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:58:52,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 714 transitions, 14345 flow [2024-06-21 20:58:57,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 714 transitions, 13748 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:57,457 INFO L231 Difference]: Finished difference. Result has 357 places, 679 transitions, 12358 flow [2024-06-21 20:58:57,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11625, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12358, PETRI_PLACES=357, PETRI_TRANSITIONS=679} [2024-06-21 20:58:57,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-21 20:58:57,457 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 679 transitions, 12358 flow [2024-06-21 20:58:57,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:57,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:57,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:57,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:58:57,458 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:57,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:57,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2092305248, now seen corresponding path program 4 times [2024-06-21 20:58:57,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:57,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362778177] [2024-06-21 20:58:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:57,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:58,475 INFO 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 20:58:58,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:58,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362778177] [2024-06-21 20:58:58,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362778177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:58,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:58,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:58,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909872287] [2024-06-21 20:58:58,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:58,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:58,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:58,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:58,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:58,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:58:58,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 679 transitions, 12358 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:58,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:58,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:58:58,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:01,558 INFO L124 PetriNetUnfolderBase]: 7074/10560 cut-off events. [2024-06-21 20:59:01,559 INFO L125 PetriNetUnfolderBase]: For 1871640/1871640 co-relation queries the response was YES. [2024-06-21 20:59:01,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113338 conditions, 10560 events. 7074/10560 cut-off events. For 1871640/1871640 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 62022 event pairs, 1553 based on Foata normal form. 23/10582 useless extension candidates. Maximal degree in co-relation 113160. Up to 9793 conditions per place. [2024-06-21 20:59:01,857 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 599 selfloop transitions, 132 changer transitions 0/734 dead transitions. [2024-06-21 20:59:01,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 734 transitions, 15067 flow [2024-06-21 20:59:01,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 20:59:01,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-21 20:59:01,860 INFO L175 Difference]: Start difference. First operand has 357 places, 679 transitions, 12358 flow. Second operand 10 states and 171 transitions. [2024-06-21 20:59:01,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 734 transitions, 15067 flow [2024-06-21 20:59:05,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 734 transitions, 14270 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-21 20:59:05,953 INFO L231 Difference]: Finished difference. Result has 363 places, 704 transitions, 12538 flow [2024-06-21 20:59:05,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11565, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12538, PETRI_PLACES=363, PETRI_TRANSITIONS=704} [2024-06-21 20:59:05,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-21 20:59:05,954 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 704 transitions, 12538 flow [2024-06-21 20:59:05,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:05,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:05,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:05,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:59:05,954 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:05,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:05,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2092305558, now seen corresponding path program 6 times [2024-06-21 20:59:05,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:05,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197211842] [2024-06-21 20:59:05,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:05,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:06,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:06,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197211842] [2024-06-21 20:59:06,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197211842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:06,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:06,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:06,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351726459] [2024-06-21 20:59:06,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:06,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:06,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:06,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:06,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:07,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:59:07,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 704 transitions, 12538 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:07,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:07,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:59:07,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:10,250 INFO L124 PetriNetUnfolderBase]: 7094/10586 cut-off events. [2024-06-21 20:59:10,250 INFO L125 PetriNetUnfolderBase]: For 1843681/1843683 co-relation queries the response was YES. [2024-06-21 20:59:10,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113373 conditions, 10586 events. 7094/10586 cut-off events. For 1843681/1843683 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 62263 event pairs, 1359 based on Foata normal form. 6/10591 useless extension candidates. Maximal degree in co-relation 113190. Up to 7864 conditions per place. [2024-06-21 20:59:10,411 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 458 selfloop transitions, 286 changer transitions 0/747 dead transitions. [2024-06-21 20:59:10,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 747 transitions, 14685 flow [2024-06-21 20:59:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 20:59:10,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-21 20:59:10,413 INFO L175 Difference]: Start difference. First operand has 363 places, 704 transitions, 12538 flow. Second operand 10 states and 191 transitions. [2024-06-21 20:59:10,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 747 transitions, 14685 flow [2024-06-21 20:59:14,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 747 transitions, 14470 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:14,901 INFO L231 Difference]: Finished difference. Result has 369 places, 709 transitions, 13043 flow [2024-06-21 20:59:14,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12323, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13043, PETRI_PLACES=369, PETRI_TRANSITIONS=709} [2024-06-21 20:59:14,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-21 20:59:14,902 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 709 transitions, 13043 flow [2024-06-21 20:59:14,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:14,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:14,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:14,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:59:14,902 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:14,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:14,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1064886522, now seen corresponding path program 4 times [2024-06-21 20:59:14,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:14,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131894878] [2024-06-21 20:59:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:14,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:15,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:15,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131894878] [2024-06-21 20:59:15,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131894878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:15,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:15,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:15,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475941459] [2024-06-21 20:59:15,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:15,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:15,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:15,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:15,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:15,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:59:15,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 709 transitions, 13043 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:15,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:15,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:59:15,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:18,609 INFO L124 PetriNetUnfolderBase]: 7049/10521 cut-off events. [2024-06-21 20:59:18,610 INFO L125 PetriNetUnfolderBase]: For 1862396/1862396 co-relation queries the response was YES. [2024-06-21 20:59:18,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113081 conditions, 10521 events. 7049/10521 cut-off events. For 1862396/1862396 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 61908 event pairs, 1682 based on Foata normal form. 9/10529 useless extension candidates. Maximal degree in co-relation 112898. Up to 10032 conditions per place. [2024-06-21 20:59:18,950 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 653 selfloop transitions, 82 changer transitions 0/738 dead transitions. [2024-06-21 20:59:18,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 738 transitions, 14971 flow [2024-06-21 20:59:18,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:59:18,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:59:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 20:59:18,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 20:59:18,951 INFO L175 Difference]: Start difference. First operand has 369 places, 709 transitions, 13043 flow. Second operand 8 states and 142 transitions. [2024-06-21 20:59:18,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 738 transitions, 14971 flow [2024-06-21 20:59:23,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 738 transitions, 14321 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-21 20:59:23,464 INFO L231 Difference]: Finished difference. Result has 370 places, 713 transitions, 12774 flow [2024-06-21 20:59:23,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12397, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12774, PETRI_PLACES=370, PETRI_TRANSITIONS=713} [2024-06-21 20:59:23,465 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-21 20:59:23,465 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 713 transitions, 12774 flow [2024-06-21 20:59:23,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:23,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:23,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:23,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:59:23,465 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:23,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:23,465 INFO L85 PathProgramCache]: Analyzing trace with hash 790557720, now seen corresponding path program 5 times [2024-06-21 20:59:23,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:23,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543327359] [2024-06-21 20:59:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:23,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:24,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:24,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543327359] [2024-06-21 20:59:24,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543327359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:24,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:24,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:24,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294901568] [2024-06-21 20:59:24,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:24,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:24,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:24,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:24,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:24,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:59:24,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 713 transitions, 12774 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:24,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:24,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:59:24,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:27,062 INFO L124 PetriNetUnfolderBase]: 7034/10502 cut-off events. [2024-06-21 20:59:27,063 INFO L125 PetriNetUnfolderBase]: For 1859605/1859605 co-relation queries the response was YES. [2024-06-21 20:59:27,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111555 conditions, 10502 events. 7034/10502 cut-off events. For 1859605/1859605 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 61728 event pairs, 1728 based on Foata normal form. 9/10510 useless extension candidates. Maximal degree in co-relation 111370. Up to 10363 conditions per place. [2024-06-21 20:59:27,231 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 685 selfloop transitions, 45 changer transitions 0/733 dead transitions. [2024-06-21 20:59:27,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 733 transitions, 14407 flow [2024-06-21 20:59:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:59:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:59:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 20:59:27,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 20:59:27,232 INFO L175 Difference]: Start difference. First operand has 370 places, 713 transitions, 12774 flow. Second operand 8 states and 132 transitions. [2024-06-21 20:59:27,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 733 transitions, 14407 flow [2024-06-21 20:59:32,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 733 transitions, 14222 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:32,425 INFO L231 Difference]: Finished difference. Result has 374 places, 718 transitions, 12821 flow [2024-06-21 20:59:32,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12605, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12821, PETRI_PLACES=374, PETRI_TRANSITIONS=718} [2024-06-21 20:59:32,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-21 20:59:32,425 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 718 transitions, 12821 flow [2024-06-21 20:59:32,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:32,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:32,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:32,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:59:32,425 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:32,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:32,426 INFO L85 PathProgramCache]: Analyzing trace with hash 790142010, now seen corresponding path program 6 times [2024-06-21 20:59:32,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:32,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84847136] [2024-06-21 20:59:32,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:32,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:33,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:33,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84847136] [2024-06-21 20:59:33,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84847136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:33,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:33,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:33,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463214723] [2024-06-21 20:59:33,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:33,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:33,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:33,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:33,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:33,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:59:33,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 718 transitions, 12821 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:33,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:33,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:59:33,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:36,057 INFO L124 PetriNetUnfolderBase]: 7019/10481 cut-off events. [2024-06-21 20:59:36,057 INFO L125 PetriNetUnfolderBase]: For 1860719/1860719 co-relation queries the response was YES. [2024-06-21 20:59:36,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110598 conditions, 10481 events. 7019/10481 cut-off events. For 1860719/1860719 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 61676 event pairs, 1699 based on Foata normal form. 9/10489 useless extension candidates. Maximal degree in co-relation 110413. Up to 10285 conditions per place. [2024-06-21 20:59:36,396 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 681 selfloop transitions, 56 changer transitions 0/740 dead transitions. [2024-06-21 20:59:36,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 740 transitions, 14453 flow [2024-06-21 20:59:36,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:59:36,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:59:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 20:59:36,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 20:59:36,397 INFO L175 Difference]: Start difference. First operand has 374 places, 718 transitions, 12821 flow. Second operand 8 states and 137 transitions. [2024-06-21 20:59:36,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 740 transitions, 14453 flow [2024-06-21 20:59:41,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 740 transitions, 14338 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:41,527 INFO L231 Difference]: Finished difference. Result has 378 places, 722 transitions, 12930 flow [2024-06-21 20:59:41,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12706, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12930, PETRI_PLACES=378, PETRI_TRANSITIONS=722} [2024-06-21 20:59:41,528 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-21 20:59:41,528 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 722 transitions, 12930 flow [2024-06-21 20:59:41,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:41,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:41,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:41,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:59:41,528 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:41,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:41,528 INFO L85 PathProgramCache]: Analyzing trace with hash -615718858, now seen corresponding path program 7 times [2024-06-21 20:59:41,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:41,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903808974] [2024-06-21 20:59:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:41,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:42,136 INFO 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 20:59:42,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:42,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903808974] [2024-06-21 20:59:42,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903808974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:42,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:42,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:42,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169916467] [2024-06-21 20:59:42,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:42,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:42,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:42,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:42,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:42,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 20:59:42,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 722 transitions, 12930 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:42,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:42,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 20:59:42,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:45,198 INFO L124 PetriNetUnfolderBase]: 7049/10523 cut-off events. [2024-06-21 20:59:45,199 INFO L125 PetriNetUnfolderBase]: For 1879093/1879095 co-relation queries the response was YES. [2024-06-21 20:59:45,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111329 conditions, 10523 events. 7049/10523 cut-off events. For 1879093/1879095 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 61871 event pairs, 1688 based on Foata normal form. 8/10530 useless extension candidates. Maximal degree in co-relation 111143. Up to 9943 conditions per place. [2024-06-21 20:59:45,361 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 645 selfloop transitions, 102 changer transitions 0/750 dead transitions. [2024-06-21 20:59:45,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 750 transitions, 15076 flow [2024-06-21 20:59:45,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:59:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:59:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 20:59:45,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 20:59:45,362 INFO L175 Difference]: Start difference. First operand has 378 places, 722 transitions, 12930 flow. Second operand 8 states and 143 transitions. [2024-06-21 20:59:45,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 750 transitions, 15076 flow