./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.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-cde23df-m [2024-06-14 13:26:37,981 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:26:38,016 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:26:38,019 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:26:38,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:26:38,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:26:38,045 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:26:38,046 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:26:38,046 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:26:38,050 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:26:38,050 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:26:38,050 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:26:38,051 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:26:38,052 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:26:38,052 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:26:38,052 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:26:38,052 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:26:38,052 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:26:38,052 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:26:38,053 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:26:38,053 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:26:38,053 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:26:38,053 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:26:38,053 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:26:38,053 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:26:38,053 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:26:38,054 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:26:38,054 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:26:38,054 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:26:38,054 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:26:38,055 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:26:38,055 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:26:38,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:26:38,055 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:26:38,055 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:26:38,056 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:26:38,056 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:26:38,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:26:38,056 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:26:38,056 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:26:38,056 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:26:38,056 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:26:38,056 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:26:38,057 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:26:38,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:26:38,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:26:38,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:26:38,288 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:26:38,288 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:26:38,289 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-14 13:26:39,359 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:26:39,637 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:26:39,641 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-14 13:26:39,663 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57b5623de/7fa2bf88c8554de48eca0f5e0245bd8d/FLAG74c852d11 [2024-06-14 13:26:39,974 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57b5623de/7fa2bf88c8554de48eca0f5e0245bd8d [2024-06-14 13:26:39,976 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:26:39,976 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:26:39,977 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-14 13:26:40,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:26:40,116 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:26:40,116 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:26:40,116 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:26:40,120 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:26:40,121 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:26:39" (1/2) ... [2024-06-14 13:26:40,121 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@107da9b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:26:40, skipping insertion in model container [2024-06-14 13:26:40,122 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:26:39" (1/2) ... [2024-06-14 13:26:40,123 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6a99ffea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:26:40, skipping insertion in model container [2024-06-14 13:26:40,123 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:26:40" (2/2) ... [2024-06-14 13:26:40,126 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@107da9b5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:26:40, skipping insertion in model container [2024-06-14 13:26:40,127 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:26:40" (2/2) ... [2024-06-14 13:26:40,128 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:26:40,192 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:26:40,193 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] (((((((((((((((((! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-14 13:26:40,193 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-14 13:26:40,193 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-14 13:26:40,194 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:26:40,194 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-14 13:26:40,233 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:26:40,556 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:26:40,571 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:26:40,696 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:26:40,744 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:26:40,745 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:26:40 WrapperNode [2024-06-14 13:26:40,745 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:26:40,747 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:26:40,747 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:26:40,748 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:26:40,755 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 14.06 01:26:40" (1/1) ... [2024-06-14 13:26:40,793 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 14.06 01:26:40" (1/1) ... [2024-06-14 13:26:40,829 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-14 13:26:40,829 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:26:40,830 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:26:40,830 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:26:40,830 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:26:40,842 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:26:40" (1/1) ... [2024-06-14 13:26:40,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:26:40" (1/1) ... [2024-06-14 13:26:40,846 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:26:40" (1/1) ... [2024-06-14 13:26:40,863 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]. [2024-06-14 13:26:40,870 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:26:40" (1/1) ... [2024-06-14 13:26:40,871 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:26:40" (1/1) ... [2024-06-14 13:26:40,879 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:26:40" (1/1) ... [2024-06-14 13:26:40,888 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:26:40" (1/1) ... [2024-06-14 13:26:40,898 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:26:40" (1/1) ... [2024-06-14 13:26:40,900 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:26:40" (1/1) ... [2024-06-14 13:26:40,903 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:26:40,912 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:26:40,912 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:26:40,912 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:26:40,913 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:26:40" (1/1) ... [2024-06-14 13:26:40,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:26:40,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:26:40,956 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) [2024-06-14 13:26:40,984 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 [2024-06-14 13:26:40,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:26:40,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:26:40,996 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:26:40,997 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:26:40,997 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:26:40,997 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:26:40,997 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:26:40,997 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:26:40,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:26:40,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:26:40,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:26:40,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:26:41,000 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:26:41,131 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:26:41,133 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:26:41,485 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:26:41,485 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:26:41,701 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:26:41,702 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:26:41,703 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:26:41 BoogieIcfgContainer [2024-06-14 13:26:41,703 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:26:41,706 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:26:41,706 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:26:41,709 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:26:41,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:26:39" (1/4) ... [2024-06-14 13:26:41,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51881d25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:26:41, skipping insertion in model container [2024-06-14 13:26:41,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:26:40" (2/4) ... [2024-06-14 13:26:41,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51881d25 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:26:41, skipping insertion in model container [2024-06-14 13:26:41,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:26:40" (3/4) ... [2024-06-14 13:26:41,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51881d25 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:26:41, skipping insertion in model container [2024-06-14 13:26:41,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:26:41" (4/4) ... [2024-06-14 13:26:41,713 INFO L112 eAbstractionObserver]: Analyzing ICFG safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-14 13:26:41,730 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:26:41,730 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:26:41,730 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:26:41,783 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:26:41,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 13:26:41,843 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 13:26:41,844 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:26:41,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:26:41,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 13:26:41,849 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 13:26:41,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:26:41,867 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;@4f0d48d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:26:41,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:26:41,873 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:26:41,873 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 13:26:41,873 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:26:41,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:41,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:26:41,874 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)] === [2024-06-14 13:26:41,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:41,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1004483788, now seen corresponding path program 1 times [2024-06-14 13:26:41,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:41,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822893885] [2024-06-14 13:26:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:41,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:42,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:42,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822893885] [2024-06-14 13:26:42,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822893885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:42,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:42,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:26:42,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935520620] [2024-06-14 13:26:42,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:42,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:26:42,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:42,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:26:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:26:42,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:26:42,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:42,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:42,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:26:42,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:43,343 INFO L124 PetriNetUnfolderBase]: 1656/2484 cut-off events. [2024-06-14 13:26:43,343 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-06-14 13:26:43,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5069 conditions, 2484 events. 1656/2484 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11839 event pairs, 955 based on Foata normal form. 3/2438 useless extension candidates. Maximal degree in co-relation 5054. Up to 2464 conditions per place. [2024-06-14 13:26:43,357 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 37 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-14 13:26:43,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 187 flow [2024-06-14 13:26:43,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:26:43,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:26:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-14 13:26:43,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 13:26:43,367 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-14 13:26:43,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 187 flow [2024-06-14 13:26:43,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:43,371 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 13:26:43,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 13:26:43,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 13:26:43,374 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 13:26:43,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:43,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:43,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:43,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:26:43,375 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)] === [2024-06-14 13:26:43,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1058700245, now seen corresponding path program 1 times [2024-06-14 13:26:43,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:43,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077649906] [2024-06-14 13:26:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:43,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:43,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:43,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077649906] [2024-06-14 13:26:43,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077649906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:43,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:43,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:26:43,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116995054] [2024-06-14 13:26:43,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:43,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:26:43,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:26:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:26:44,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:26:44,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:44,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:44,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:26:44,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:44,379 INFO L124 PetriNetUnfolderBase]: 1644/2466 cut-off events. [2024-06-14 13:26:44,379 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2024-06-14 13:26:44,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5667 conditions, 2466 events. 1644/2466 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11350 event pairs, 941 based on Foata normal form. 6/2471 useless extension candidates. Maximal degree in co-relation 5652. Up to 2422 conditions per place. [2024-06-14 13:26:44,389 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-14 13:26:44,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 266 flow [2024-06-14 13:26:44,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:26:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:26:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-14 13:26:44,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-14 13:26:44,391 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 89 transitions. [2024-06-14 13:26:44,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 266 flow [2024-06-14 13:26:44,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:26:44,392 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2024-06-14 13:26:44,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-14 13:26:44,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-14 13:26:44,393 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2024-06-14 13:26:44,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:44,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:44,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:44,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:26:44,394 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)] === [2024-06-14 13:26:44,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:44,395 INFO L85 PathProgramCache]: Analyzing trace with hash 496336778, now seen corresponding path program 1 times [2024-06-14 13:26:44,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:44,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941115955] [2024-06-14 13:26:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:44,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:45,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:45,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941115955] [2024-06-14 13:26:45,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941115955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:45,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:45,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:26:45,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967868315] [2024-06-14 13:26:45,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:45,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:26:45,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:45,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:26:45,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:26:45,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:26:45,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:45,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:45,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:26:45,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:46,146 INFO L124 PetriNetUnfolderBase]: 1632/2448 cut-off events. [2024-06-14 13:26:46,146 INFO L125 PetriNetUnfolderBase]: For 1179/1187 co-relation queries the response was YES. [2024-06-14 13:26:46,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6249 conditions, 2448 events. 1632/2448 cut-off events. For 1179/1187 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11325 event pairs, 691 based on Foata normal form. 12/2459 useless extension candidates. Maximal degree in co-relation 6231. Up to 2374 conditions per place. [2024-06-14 13:26:46,157 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2024-06-14 13:26:46,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 68 transitions, 352 flow [2024-06-14 13:26:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:26:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:26:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-06-14 13:26:46,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190476190476191 [2024-06-14 13:26:46,159 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 5 states and 109 transitions. [2024-06-14 13:26:46,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 68 transitions, 352 flow [2024-06-14 13:26:46,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 350 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 13:26:46,162 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 200 flow [2024-06-14 13:26:46,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-14 13:26:46,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-14 13:26:46,162 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 200 flow [2024-06-14 13:26:46,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:46,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:46,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:46,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:26:46,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:26:46,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1943845815, now seen corresponding path program 1 times [2024-06-14 13:26:46,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:46,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575028512] [2024-06-14 13:26:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:46,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:46,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:46,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575028512] [2024-06-14 13:26:46,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575028512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:46,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:46,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:26:46,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035723736] [2024-06-14 13:26:46,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:46,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:26:46,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:46,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:26:46,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:26:46,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:26:46,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:46,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:46,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:26:46,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:47,227 INFO L124 PetriNetUnfolderBase]: 1637/2455 cut-off events. [2024-06-14 13:26:47,227 INFO L125 PetriNetUnfolderBase]: For 2150/2158 co-relation queries the response was YES. [2024-06-14 13:26:47,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6885 conditions, 2455 events. 1637/2455 cut-off events. For 2150/2158 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11211 event pairs, 881 based on Foata normal form. 10/2464 useless extension candidates. Maximal degree in co-relation 6864. Up to 2426 conditions per place. [2024-06-14 13:26:47,240 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 49 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-14 13:26:47,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 360 flow [2024-06-14 13:26:47,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:26:47,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:26:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-14 13:26:47,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:26:47,243 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 200 flow. Second operand 5 states and 90 transitions. [2024-06-14 13:26:47,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 360 flow [2024-06-14 13:26:47,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 61 transitions, 338 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:47,246 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 218 flow [2024-06-14 13:26:47,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-14 13:26:47,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-14 13:26:47,247 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 218 flow [2024-06-14 13:26:47,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:47,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:47,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:47,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:26:47,248 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)] === [2024-06-14 13:26:47,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1490748477, now seen corresponding path program 1 times [2024-06-14 13:26:47,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:47,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263540377] [2024-06-14 13:26:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:47,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:48,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:48,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263540377] [2024-06-14 13:26:48,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263540377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:48,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:48,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:26:48,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630951236] [2024-06-14 13:26:48,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:48,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:26:48,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:48,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:26:48,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:26:48,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:26:48,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 218 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:48,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:48,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:26:48,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:49,447 INFO L124 PetriNetUnfolderBase]: 1628/2440 cut-off events. [2024-06-14 13:26:49,447 INFO L125 PetriNetUnfolderBase]: For 2998/3006 co-relation queries the response was YES. [2024-06-14 13:26:49,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7380 conditions, 2440 events. 1628/2440 cut-off events. For 2998/3006 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11102 event pairs, 541 based on Foata normal form. 12/2451 useless extension candidates. Maximal degree in co-relation 7357. Up to 2336 conditions per place. [2024-06-14 13:26:49,462 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 61 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-14 13:26:49,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 77 transitions, 440 flow [2024-06-14 13:26:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:26:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:26:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-14 13:26:49,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-14 13:26:49,466 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 218 flow. Second operand 6 states and 124 transitions. [2024-06-14 13:26:49,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 77 transitions, 440 flow [2024-06-14 13:26:49,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 77 transitions, 424 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:49,472 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 243 flow [2024-06-14 13:26:49,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-14 13:26:49,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-14 13:26:49,474 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 243 flow [2024-06-14 13:26:49,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:49,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:49,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:49,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:26:49,478 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)] === [2024-06-14 13:26:49,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash -129676794, now seen corresponding path program 1 times [2024-06-14 13:26:49,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:49,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631002807] [2024-06-14 13:26:49,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:49,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:50,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:50,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631002807] [2024-06-14 13:26:50,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631002807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:50,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:50,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:26:50,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820746167] [2024-06-14 13:26:50,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:50,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:26:50,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:50,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:26:50,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:26:50,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:26:50,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 243 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 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) [2024-06-14 13:26:50,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:50,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:26:50,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:50,843 INFO L124 PetriNetUnfolderBase]: 1897/2824 cut-off events. [2024-06-14 13:26:50,843 INFO L125 PetriNetUnfolderBase]: For 4861/4861 co-relation queries the response was YES. [2024-06-14 13:26:50,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8913 conditions, 2824 events. 1897/2824 cut-off events. For 4861/4861 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12882 event pairs, 1022 based on Foata normal form. 2/2826 useless extension candidates. Maximal degree in co-relation 8890. Up to 2793 conditions per place. [2024-06-14 13:26:50,874 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-06-14 13:26:50,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 464 flow [2024-06-14 13:26:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:26:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:26:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 13:26:50,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-14 13:26:50,876 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 243 flow. Second operand 6 states and 97 transitions. [2024-06-14 13:26:50,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 464 flow [2024-06-14 13:26:50,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 73 transitions, 429 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:26:50,882 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 303 flow [2024-06-14 13:26:50,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-14 13:26:50,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-14 13:26:50,883 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 303 flow [2024-06-14 13:26:50,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 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) [2024-06-14 13:26:50,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:50,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:50,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:26:50,884 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)] === [2024-06-14 13:26:50,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:50,885 INFO L85 PathProgramCache]: Analyzing trace with hash -287765952, now seen corresponding path program 1 times [2024-06-14 13:26:50,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:50,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076526540] [2024-06-14 13:26:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:50,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:51,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:51,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076526540] [2024-06-14 13:26:51,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076526540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:51,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:51,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:26:51,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152699866] [2024-06-14 13:26:51,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:51,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:26:51,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:51,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:26:51,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:26:51,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:26:51,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:51,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:51,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:26:51,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:52,131 INFO L124 PetriNetUnfolderBase]: 1827/2736 cut-off events. [2024-06-14 13:26:52,132 INFO L125 PetriNetUnfolderBase]: For 6668/6710 co-relation queries the response was YES. [2024-06-14 13:26:52,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9339 conditions, 2736 events. 1827/2736 cut-off events. For 6668/6710 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12551 event pairs, 801 based on Foata normal form. 15/2741 useless extension candidates. Maximal degree in co-relation 9312. Up to 2659 conditions per place. [2024-06-14 13:26:52,146 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 60 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2024-06-14 13:26:52,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 531 flow [2024-06-14 13:26:52,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:26:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:26:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:26:52,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-14 13:26:52,148 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 303 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:26:52,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 531 flow [2024-06-14 13:26:52,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 525 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 13:26:52,153 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 378 flow [2024-06-14 13:26:52,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=378, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-14 13:26:52,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-14 13:26:52,154 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 378 flow [2024-06-14 13:26:52,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:52,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:52,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:52,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:26:52,155 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)] === [2024-06-14 13:26:52,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:52,155 INFO L85 PathProgramCache]: Analyzing trace with hash 274979112, now seen corresponding path program 2 times [2024-06-14 13:26:52,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:52,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713492237] [2024-06-14 13:26:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:52,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:52,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:52,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713492237] [2024-06-14 13:26:52,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713492237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:52,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:52,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:26:52,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212953033] [2024-06-14 13:26:52,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:52,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:26:52,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:52,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:26:52,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:26:52,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:26:52,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 378 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:52,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:52,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:26:52,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:53,352 INFO L124 PetriNetUnfolderBase]: 1871/2802 cut-off events. [2024-06-14 13:26:53,352 INFO L125 PetriNetUnfolderBase]: For 9205/9248 co-relation queries the response was YES. [2024-06-14 13:26:53,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10527 conditions, 2802 events. 1871/2802 cut-off events. For 9205/9248 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12907 event pairs, 782 based on Foata normal form. 18/2808 useless extension candidates. Maximal degree in co-relation 10496. Up to 2677 conditions per place. [2024-06-14 13:26:53,367 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 61 selfloop transitions, 23 changer transitions 0/91 dead transitions. [2024-06-14 13:26:53,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 91 transitions, 680 flow [2024-06-14 13:26:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:26:53,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:26:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 13:26:53,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-14 13:26:53,372 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 378 flow. Second operand 6 states and 109 transitions. [2024-06-14 13:26:53,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 91 transitions, 680 flow [2024-06-14 13:26:53,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 91 transitions, 657 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-14 13:26:53,378 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 490 flow [2024-06-14 13:26:53,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=490, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-14 13:26:53,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-14 13:26:53,380 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 490 flow [2024-06-14 13:26:53,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:53,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:53,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:53,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:26:53,381 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)] === [2024-06-14 13:26:53,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:53,381 INFO L85 PathProgramCache]: Analyzing trace with hash 274988040, now seen corresponding path program 1 times [2024-06-14 13:26:53,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:53,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040860988] [2024-06-14 13:26:53,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:53,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:54,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:54,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040860988] [2024-06-14 13:26:54,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040860988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:54,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:54,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:26:54,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141072457] [2024-06-14 13:26:54,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:54,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:26:54,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:54,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:26:54,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:26:54,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:26:54,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 490 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:54,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:54,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:26:54,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:55,003 INFO L124 PetriNetUnfolderBase]: 1932/2875 cut-off events. [2024-06-14 13:26:55,004 INFO L125 PetriNetUnfolderBase]: For 11634/11634 co-relation queries the response was YES. [2024-06-14 13:26:55,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11244 conditions, 2875 events. 1932/2875 cut-off events. For 11634/11634 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13219 event pairs, 857 based on Foata normal form. 2/2877 useless extension candidates. Maximal degree in co-relation 11210. Up to 2835 conditions per place. [2024-06-14 13:26:55,024 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 77 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-14 13:26:55,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 734 flow [2024-06-14 13:26:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:55,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 13:26:55,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-14 13:26:55,026 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 490 flow. Second operand 7 states and 111 transitions. [2024-06-14 13:26:55,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 734 flow [2024-06-14 13:26:55,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 94 transitions, 690 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:55,038 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 502 flow [2024-06-14 13:26:55,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=502, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2024-06-14 13:26:55,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-14 13:26:55,039 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 502 flow [2024-06-14 13:26:55,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:55,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:55,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:55,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:26:55,039 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)] === [2024-06-14 13:26:55,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:55,040 INFO L85 PathProgramCache]: Analyzing trace with hash 785936290, now seen corresponding path program 1 times [2024-06-14 13:26:55,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:55,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770176723] [2024-06-14 13:26:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:55,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:55,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:55,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770176723] [2024-06-14 13:26:55,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770176723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:55,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:55,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:26:55,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542508763] [2024-06-14 13:26:55,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:55,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:26:55,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:55,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:26:55,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:26:55,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:26:55,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 502 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) [2024-06-14 13:26:55,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:55,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:26:55,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:56,485 INFO L124 PetriNetUnfolderBase]: 1824/2735 cut-off events. [2024-06-14 13:26:56,486 INFO L125 PetriNetUnfolderBase]: For 14654/14700 co-relation queries the response was YES. [2024-06-14 13:26:56,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11362 conditions, 2735 events. 1824/2735 cut-off events. For 14654/14700 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12771 event pairs, 752 based on Foata normal form. 33/2712 useless extension candidates. Maximal degree in co-relation 11327. Up to 2608 conditions per place. [2024-06-14 13:26:56,501 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 69 selfloop transitions, 18 changer transitions 0/95 dead transitions. [2024-06-14 13:26:56,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 95 transitions, 737 flow [2024-06-14 13:26:56,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:26:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:26:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:26:56,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-14 13:26:56,503 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 502 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:26:56,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 95 transitions, 737 flow [2024-06-14 13:26:56,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 95 transitions, 695 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:56,513 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 521 flow [2024-06-14 13:26:56,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=521, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-06-14 13:26:56,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-14 13:26:56,515 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 521 flow [2024-06-14 13:26:56,516 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) [2024-06-14 13:26:56,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:56,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:56,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:26:56,516 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)] === [2024-06-14 13:26:56,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:56,517 INFO L85 PathProgramCache]: Analyzing trace with hash -330808593, now seen corresponding path program 1 times [2024-06-14 13:26:56,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:56,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957975342] [2024-06-14 13:26:56,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:56,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:57,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:57,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957975342] [2024-06-14 13:26:57,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957975342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:57,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:57,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:26:57,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613094979] [2024-06-14 13:26:57,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:57,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:26:57,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:57,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:26:57,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:26:57,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:26:57,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 521 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:57,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:57,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:26:57,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:57,806 INFO L124 PetriNetUnfolderBase]: 1946/2898 cut-off events. [2024-06-14 13:26:57,806 INFO L125 PetriNetUnfolderBase]: For 15739/15743 co-relation queries the response was YES. [2024-06-14 13:26:57,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12057 conditions, 2898 events. 1946/2898 cut-off events. For 15739/15743 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13165 event pairs, 829 based on Foata normal form. 8/2906 useless extension candidates. Maximal degree in co-relation 12021. Up to 2812 conditions per place. [2024-06-14 13:26:57,824 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-14 13:26:57,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 112 transitions, 897 flow [2024-06-14 13:26:57,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:57,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 13:26:57,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-14 13:26:57,826 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 521 flow. Second operand 7 states and 117 transitions. [2024-06-14 13:26:57,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 112 transitions, 897 flow [2024-06-14 13:26:57,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 112 transitions, 861 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 13:26:57,835 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 655 flow [2024-06-14 13:26:57,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=655, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2024-06-14 13:26:57,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-14 13:26:57,836 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 655 flow [2024-06-14 13:26:57,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:57,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:57,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:57,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:26:57,837 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)] === [2024-06-14 13:26:57,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:57,837 INFO L85 PathProgramCache]: Analyzing trace with hash -65313883, now seen corresponding path program 2 times [2024-06-14 13:26:57,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:57,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966984183] [2024-06-14 13:26:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:57,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:58,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:58,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966984183] [2024-06-14 13:26:58,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966984183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:58,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:58,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:26:58,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163753954] [2024-06-14 13:26:58,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:58,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:26:58,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:58,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:26:58,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:26:58,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:26:58,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 655 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:58,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:58,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:26:58,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:59,166 INFO L124 PetriNetUnfolderBase]: 1990/2964 cut-off events. [2024-06-14 13:26:59,168 INFO L125 PetriNetUnfolderBase]: For 19739/19747 co-relation queries the response was YES. [2024-06-14 13:26:59,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13023 conditions, 2964 events. 1990/2964 cut-off events. For 19739/19747 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13606 event pairs, 778 based on Foata normal form. 16/2980 useless extension candidates. Maximal degree in co-relation 12983. Up to 2699 conditions per place. [2024-06-14 13:26:59,182 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 33 changer transitions 0/125 dead transitions. [2024-06-14 13:26:59,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 125 transitions, 1099 flow [2024-06-14 13:26:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:26:59,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-14 13:26:59,184 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 655 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:26:59,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 125 transitions, 1099 flow [2024-06-14 13:26:59,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 125 transitions, 1075 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-14 13:26:59,196 INFO L231 Difference]: Finished difference. Result has 89 places, 100 transitions, 822 flow [2024-06-14 13:26:59,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=822, PETRI_PLACES=89, PETRI_TRANSITIONS=100} [2024-06-14 13:26:59,196 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-14 13:26:59,197 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 100 transitions, 822 flow [2024-06-14 13:26:59,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:59,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:59,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:59,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:26:59,197 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)] === [2024-06-14 13:26:59,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:59,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1455836185, now seen corresponding path program 3 times [2024-06-14 13:26:59,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:59,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270046779] [2024-06-14 13:26:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:59,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:59,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:59,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270046779] [2024-06-14 13:26:59,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270046779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:59,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:59,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:26:59,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997657812] [2024-06-14 13:26:59,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:59,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:26:59,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:59,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:26:59,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:26:59,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:26:59,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 100 transitions, 822 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:59,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:59,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:26:59,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:00,440 INFO L124 PetriNetUnfolderBase]: 1996/2973 cut-off events. [2024-06-14 13:27:00,441 INFO L125 PetriNetUnfolderBase]: For 23756/23764 co-relation queries the response was YES. [2024-06-14 13:27:00,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14031 conditions, 2973 events. 1996/2973 cut-off events. For 23756/23764 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13625 event pairs, 785 based on Foata normal form. 12/2985 useless extension candidates. Maximal degree in co-relation 13987. Up to 2705 conditions per place. [2024-06-14 13:27:00,481 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 91 selfloop transitions, 35 changer transitions 0/129 dead transitions. [2024-06-14 13:27:00,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 129 transitions, 1235 flow [2024-06-14 13:27:00,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:27:00,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-14 13:27:00,483 INFO L175 Difference]: Start difference. First operand has 89 places, 100 transitions, 822 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:27:00,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 129 transitions, 1235 flow [2024-06-14 13:27:00,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 129 transitions, 1193 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 13:27:00,500 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 901 flow [2024-06-14 13:27:00,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=901, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-14 13:27:00,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-14 13:27:00,501 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 901 flow [2024-06-14 13:27:00,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:00,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:00,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:00,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:27:00,501 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:00,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:00,502 INFO L85 PathProgramCache]: Analyzing trace with hash -65303963, now seen corresponding path program 1 times [2024-06-14 13:27:00,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:00,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518185049] [2024-06-14 13:27:00,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:00,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:01,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:01,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518185049] [2024-06-14 13:27:01,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518185049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:01,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:01,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:01,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785206756] [2024-06-14 13:27:01,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:01,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:01,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:01,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:01,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:01,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:01,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 901 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-14 13:27:01,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:01,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:01,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:02,158 INFO L124 PetriNetUnfolderBase]: 1988/2957 cut-off events. [2024-06-14 13:27:02,159 INFO L125 PetriNetUnfolderBase]: For 26142/26142 co-relation queries the response was YES. [2024-06-14 13:27:02,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14250 conditions, 2957 events. 1988/2957 cut-off events. For 26142/26142 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13497 event pairs, 783 based on Foata normal form. 4/2961 useless extension candidates. Maximal degree in co-relation 14204. Up to 2899 conditions per place. [2024-06-14 13:27:02,174 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 111 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2024-06-14 13:27:02,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 130 transitions, 1231 flow [2024-06-14 13:27:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:27:02,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 13:27:02,176 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 901 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:27:02,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 130 transitions, 1231 flow [2024-06-14 13:27:02,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 130 transitions, 1174 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:02,193 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 903 flow [2024-06-14 13:27:02,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=903, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2024-06-14 13:27:02,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-14 13:27:02,209 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 903 flow [2024-06-14 13:27:02,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-14 13:27:02,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:02,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:02,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:27:02,209 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)] === [2024-06-14 13:27:02,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:02,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2008575669, now seen corresponding path program 1 times [2024-06-14 13:27:02,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:02,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954682279] [2024-06-14 13:27:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:02,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:03,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:03,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954682279] [2024-06-14 13:27:03,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954682279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:03,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:03,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:03,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944446886] [2024-06-14 13:27:03,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:03,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:03,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:03,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:03,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:03,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:27:03,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 903 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) [2024-06-14 13:27:03,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:03,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:27:03,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:03,925 INFO L124 PetriNetUnfolderBase]: 1920/2878 cut-off events. [2024-06-14 13:27:03,926 INFO L125 PetriNetUnfolderBase]: For 31861/31945 co-relation queries the response was YES. [2024-06-14 13:27:03,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14445 conditions, 2878 events. 1920/2878 cut-off events. For 31861/31945 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13441 event pairs, 585 based on Foata normal form. 19/2833 useless extension candidates. Maximal degree in co-relation 14398. Up to 2698 conditions per place. [2024-06-14 13:27:03,950 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 97 selfloop transitions, 21 changer transitions 0/136 dead transitions. [2024-06-14 13:27:03,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1229 flow [2024-06-14 13:27:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:27:03,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:27:03,953 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 903 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:27:03,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1229 flow [2024-06-14 13:27:03,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 136 transitions, 1188 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:03,976 INFO L231 Difference]: Finished difference. Result has 100 places, 109 transitions, 940 flow [2024-06-14 13:27:03,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=940, PETRI_PLACES=100, PETRI_TRANSITIONS=109} [2024-06-14 13:27:03,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-14 13:27:03,979 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 109 transitions, 940 flow [2024-06-14 13:27:03,979 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) [2024-06-14 13:27:03,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:03,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:03,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:27:03,979 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)] === [2024-06-14 13:27:03,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:03,980 INFO L85 PathProgramCache]: Analyzing trace with hash 2008580319, now seen corresponding path program 2 times [2024-06-14 13:27:03,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:03,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955941477] [2024-06-14 13:27:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:03,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:05,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:05,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955941477] [2024-06-14 13:27:05,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955941477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:05,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:05,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:05,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286907007] [2024-06-14 13:27:05,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:05,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:05,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:05,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:05,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:05,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:27:05,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 109 transitions, 940 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) [2024-06-14 13:27:05,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:05,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:27:05,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:05,840 INFO L124 PetriNetUnfolderBase]: 1940/2910 cut-off events. [2024-06-14 13:27:05,840 INFO L125 PetriNetUnfolderBase]: For 36459/36553 co-relation queries the response was YES. [2024-06-14 13:27:05,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15209 conditions, 2910 events. 1940/2910 cut-off events. For 36459/36553 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13573 event pairs, 580 based on Foata normal form. 26/2870 useless extension candidates. Maximal degree in co-relation 15161. Up to 2672 conditions per place. [2024-06-14 13:27:05,860 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 88 selfloop transitions, 32 changer transitions 0/138 dead transitions. [2024-06-14 13:27:05,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 138 transitions, 1274 flow [2024-06-14 13:27:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:05,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:27:05,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-14 13:27:05,862 INFO L175 Difference]: Start difference. First operand has 100 places, 109 transitions, 940 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:27:05,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 138 transitions, 1274 flow [2024-06-14 13:27:05,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 138 transitions, 1220 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:05,879 INFO L231 Difference]: Finished difference. Result has 102 places, 112 transitions, 995 flow [2024-06-14 13:27:05,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=995, PETRI_PLACES=102, PETRI_TRANSITIONS=112} [2024-06-14 13:27:05,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-14 13:27:05,880 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 112 transitions, 995 flow [2024-06-14 13:27:05,880 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) [2024-06-14 13:27:05,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:05,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:05,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:27:05,881 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)] === [2024-06-14 13:27:05,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:05,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1665310171, now seen corresponding path program 1 times [2024-06-14 13:27:05,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:05,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833761397] [2024-06-14 13:27:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:05,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:06,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:06,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833761397] [2024-06-14 13:27:06,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833761397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:06,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:06,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:06,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13980873] [2024-06-14 13:27:06,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:06,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:06,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:06,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:06,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:07,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:07,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 112 transitions, 995 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-14 13:27:07,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:07,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:07,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:07,738 INFO L124 PetriNetUnfolderBase]: 2047/3042 cut-off events. [2024-06-14 13:27:07,738 INFO L125 PetriNetUnfolderBase]: For 37873/37873 co-relation queries the response was YES. [2024-06-14 13:27:07,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16084 conditions, 3042 events. 2047/3042 cut-off events. For 37873/37873 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13948 event pairs, 745 based on Foata normal form. 2/3044 useless extension candidates. Maximal degree in co-relation 16035. Up to 2940 conditions per place. [2024-06-14 13:27:07,757 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 114 selfloop transitions, 22 changer transitions 0/139 dead transitions. [2024-06-14 13:27:07,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 139 transitions, 1363 flow [2024-06-14 13:27:07,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 13:27:07,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-14 13:27:07,759 INFO L175 Difference]: Start difference. First operand has 102 places, 112 transitions, 995 flow. Second operand 7 states and 117 transitions. [2024-06-14 13:27:07,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 139 transitions, 1363 flow [2024-06-14 13:27:07,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 139 transitions, 1284 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:07,780 INFO L231 Difference]: Finished difference. Result has 104 places, 115 transitions, 1010 flow [2024-06-14 13:27:07,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1010, PETRI_PLACES=104, PETRI_TRANSITIONS=115} [2024-06-14 13:27:07,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-14 13:27:07,817 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 115 transitions, 1010 flow [2024-06-14 13:27:07,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-14 13:27:07,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:07,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:07,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:27:07,817 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)] === [2024-06-14 13:27:07,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:07,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1665130433, now seen corresponding path program 1 times [2024-06-14 13:27:07,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:07,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453439991] [2024-06-14 13:27:07,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:07,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:08,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:08,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453439991] [2024-06-14 13:27:08,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453439991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:08,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:08,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:08,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415678617] [2024-06-14 13:27:08,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:08,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:08,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:08,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:08,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:08,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:08,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 115 transitions, 1010 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-14 13:27:08,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:08,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:08,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:09,429 INFO L124 PetriNetUnfolderBase]: 2069/3076 cut-off events. [2024-06-14 13:27:09,429 INFO L125 PetriNetUnfolderBase]: For 42310/42318 co-relation queries the response was YES. [2024-06-14 13:27:09,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16519 conditions, 3076 events. 2069/3076 cut-off events. For 42310/42318 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14078 event pairs, 749 based on Foata normal form. 12/3088 useless extension candidates. Maximal degree in co-relation 16469. Up to 2967 conditions per place. [2024-06-14 13:27:09,449 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 20 changer transitions 0/147 dead transitions. [2024-06-14 13:27:09,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 147 transitions, 1409 flow [2024-06-14 13:27:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:09,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:27:09,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:27:09,452 INFO L175 Difference]: Start difference. First operand has 104 places, 115 transitions, 1010 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:27:09,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 147 transitions, 1409 flow [2024-06-14 13:27:09,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 147 transitions, 1369 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:09,481 INFO L231 Difference]: Finished difference. Result has 109 places, 118 transitions, 1057 flow [2024-06-14 13:27:09,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1057, PETRI_PLACES=109, PETRI_TRANSITIONS=118} [2024-06-14 13:27:09,482 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-14 13:27:09,482 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 118 transitions, 1057 flow [2024-06-14 13:27:09,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-14 13:27:09,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:09,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:09,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:27:09,483 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)] === [2024-06-14 13:27:09,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:09,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2033003225, now seen corresponding path program 2 times [2024-06-14 13:27:09,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:09,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728826254] [2024-06-14 13:27:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:09,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:10,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:10,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728826254] [2024-06-14 13:27:10,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728826254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:10,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:10,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:10,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494219279] [2024-06-14 13:27:10,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:10,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:10,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:10,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:10,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:10,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:10,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 118 transitions, 1057 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-14 13:27:10,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:10,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:10,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:10,947 INFO L124 PetriNetUnfolderBase]: 2059/3064 cut-off events. [2024-06-14 13:27:10,947 INFO L125 PetriNetUnfolderBase]: For 46292/46300 co-relation queries the response was YES. [2024-06-14 13:27:10,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16683 conditions, 3064 events. 2059/3064 cut-off events. For 46292/46300 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14094 event pairs, 746 based on Foata normal form. 12/3076 useless extension candidates. Maximal degree in co-relation 16632. Up to 2811 conditions per place. [2024-06-14 13:27:10,970 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 43 changer transitions 0/142 dead transitions. [2024-06-14 13:27:10,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1407 flow [2024-06-14 13:27:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:27:10,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:27:10,975 INFO L175 Difference]: Start difference. First operand has 109 places, 118 transitions, 1057 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:27:10,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1407 flow [2024-06-14 13:27:10,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 142 transitions, 1349 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:11,001 INFO L231 Difference]: Finished difference. Result has 111 places, 120 transitions, 1137 flow [2024-06-14 13:27:11,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1137, PETRI_PLACES=111, PETRI_TRANSITIONS=120} [2024-06-14 13:27:11,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-14 13:27:11,002 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 120 transitions, 1137 flow [2024-06-14 13:27:11,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-14 13:27:11,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:11,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:11,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:27:11,002 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)] === [2024-06-14 13:27:11,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:11,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2033010169, now seen corresponding path program 3 times [2024-06-14 13:27:11,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:11,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015287722] [2024-06-14 13:27:11,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:11,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:12,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:12,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015287722] [2024-06-14 13:27:12,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015287722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:12,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:12,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:12,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105312389] [2024-06-14 13:27:12,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:12,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:12,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:12,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:12,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:12,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:27:12,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 120 transitions, 1137 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:12,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:12,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:27:12,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:12,738 INFO L124 PetriNetUnfolderBase]: 1957/2941 cut-off events. [2024-06-14 13:27:12,739 INFO L125 PetriNetUnfolderBase]: For 54166/54257 co-relation queries the response was YES. [2024-06-14 13:27:12,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16877 conditions, 2941 events. 1957/2941 cut-off events. For 54166/54257 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13808 event pairs, 571 based on Foata normal form. 25/2898 useless extension candidates. Maximal degree in co-relation 16824. Up to 2637 conditions per place. [2024-06-14 13:27:12,759 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 39 changer transitions 0/147 dead transitions. [2024-06-14 13:27:12,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 147 transitions, 1485 flow [2024-06-14 13:27:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:27:12,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-14 13:27:12,761 INFO L175 Difference]: Start difference. First operand has 111 places, 120 transitions, 1137 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:27:12,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 147 transitions, 1485 flow [2024-06-14 13:27:12,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 147 transitions, 1361 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:27:12,792 INFO L231 Difference]: Finished difference. Result has 111 places, 123 transitions, 1140 flow [2024-06-14 13:27:12,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1140, PETRI_PLACES=111, PETRI_TRANSITIONS=123} [2024-06-14 13:27:12,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-14 13:27:12,793 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 123 transitions, 1140 flow [2024-06-14 13:27:12,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:12,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:12,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:12,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:27:12,793 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:12,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:12,794 INFO L85 PathProgramCache]: Analyzing trace with hash -267683638, now seen corresponding path program 1 times [2024-06-14 13:27:12,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:12,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783934042] [2024-06-14 13:27:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:12,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:13,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:13,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783934042] [2024-06-14 13:27:13,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783934042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:13,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:13,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:13,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486013530] [2024-06-14 13:27:13,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:13,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:13,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:13,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:13,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:13,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:13,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 123 transitions, 1140 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 13:27:13,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:13,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:13,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:14,699 INFO L124 PetriNetUnfolderBase]: 2159/3218 cut-off events. [2024-06-14 13:27:14,700 INFO L125 PetriNetUnfolderBase]: For 50669/50671 co-relation queries the response was YES. [2024-06-14 13:27:14,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17962 conditions, 3218 events. 2159/3218 cut-off events. For 50669/50671 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14815 event pairs, 619 based on Foata normal form. 6/3224 useless extension candidates. Maximal degree in co-relation 17909. Up to 3037 conditions per place. [2024-06-14 13:27:14,724 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 147 selfloop transitions, 31 changer transitions 0/181 dead transitions. [2024-06-14 13:27:14,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 181 transitions, 1788 flow [2024-06-14 13:27:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:14,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:27:14,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:27:14,726 INFO L175 Difference]: Start difference. First operand has 111 places, 123 transitions, 1140 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:27:14,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 181 transitions, 1788 flow [2024-06-14 13:27:14,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 181 transitions, 1667 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:14,762 INFO L231 Difference]: Finished difference. Result has 118 places, 145 transitions, 1326 flow [2024-06-14 13:27:14,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1326, PETRI_PLACES=118, PETRI_TRANSITIONS=145} [2024-06-14 13:27:14,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-14 13:27:14,763 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 145 transitions, 1326 flow [2024-06-14 13:27:14,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 13:27:14,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:14,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:14,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:27:14,763 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)] === [2024-06-14 13:27:14,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:14,764 INFO L85 PathProgramCache]: Analyzing trace with hash -85156338, now seen corresponding path program 2 times [2024-06-14 13:27:14,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:14,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949723334] [2024-06-14 13:27:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:14,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:15,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:15,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949723334] [2024-06-14 13:27:15,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949723334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:15,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:15,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:15,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826090440] [2024-06-14 13:27:15,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:15,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:15,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:15,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:15,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:15,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:15,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 145 transitions, 1326 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 13:27:15,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:15,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:15,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:16,684 INFO L124 PetriNetUnfolderBase]: 2181/3250 cut-off events. [2024-06-14 13:27:16,684 INFO L125 PetriNetUnfolderBase]: For 56154/56158 co-relation queries the response was YES. [2024-06-14 13:27:16,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18722 conditions, 3250 events. 2181/3250 cut-off events. For 56154/56158 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14929 event pairs, 598 based on Foata normal form. 8/3258 useless extension candidates. Maximal degree in co-relation 18665. Up to 3013 conditions per place. [2024-06-14 13:27:16,716 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 36 changer transitions 0/183 dead transitions. [2024-06-14 13:27:16,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 183 transitions, 1844 flow [2024-06-14 13:27:16,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:16,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:16,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:27:16,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-14 13:27:16,717 INFO L175 Difference]: Start difference. First operand has 118 places, 145 transitions, 1326 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:27:16,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 183 transitions, 1844 flow [2024-06-14 13:27:16,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 183 transitions, 1794 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-14 13:27:16,758 INFO L231 Difference]: Finished difference. Result has 125 places, 151 transitions, 1437 flow [2024-06-14 13:27:16,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1437, PETRI_PLACES=125, PETRI_TRANSITIONS=151} [2024-06-14 13:27:16,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-14 13:27:16,759 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 151 transitions, 1437 flow [2024-06-14 13:27:16,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 13:27:16,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:16,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:16,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:27:16,759 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)] === [2024-06-14 13:27:16,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:16,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2136449072, now seen corresponding path program 3 times [2024-06-14 13:27:16,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:16,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995485119] [2024-06-14 13:27:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:16,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:17,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:17,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995485119] [2024-06-14 13:27:17,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995485119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:17,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:17,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:17,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943399191] [2024-06-14 13:27:17,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:17,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:17,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:17,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:17,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:17,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:17,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 151 transitions, 1437 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 13:27:17,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:17,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:17,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:18,744 INFO L124 PetriNetUnfolderBase]: 2235/3329 cut-off events. [2024-06-14 13:27:18,745 INFO L125 PetriNetUnfolderBase]: For 64069/64069 co-relation queries the response was YES. [2024-06-14 13:27:18,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19986 conditions, 3329 events. 2235/3329 cut-off events. For 64069/64069 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15329 event pairs, 594 based on Foata normal form. 4/3333 useless extension candidates. Maximal degree in co-relation 19926. Up to 2947 conditions per place. [2024-06-14 13:27:18,770 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 138 selfloop transitions, 50 changer transitions 0/191 dead transitions. [2024-06-14 13:27:18,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 191 transitions, 2081 flow [2024-06-14 13:27:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:18,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:27:18,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:27:18,774 INFO L175 Difference]: Start difference. First operand has 125 places, 151 transitions, 1437 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:27:18,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 191 transitions, 2081 flow [2024-06-14 13:27:18,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 191 transitions, 2006 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:18,824 INFO L231 Difference]: Finished difference. Result has 131 places, 159 transitions, 1585 flow [2024-06-14 13:27:18,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1585, PETRI_PLACES=131, PETRI_TRANSITIONS=159} [2024-06-14 13:27:18,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-14 13:27:18,825 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 159 transitions, 1585 flow [2024-06-14 13:27:18,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 13:27:18,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:18,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:18,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:27:18,825 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)] === [2024-06-14 13:27:18,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:18,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1997926502, now seen corresponding path program 4 times [2024-06-14 13:27:18,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:18,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39796403] [2024-06-14 13:27:18,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:18,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:19,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:19,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39796403] [2024-06-14 13:27:19,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39796403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:19,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:19,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:19,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800223757] [2024-06-14 13:27:19,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:19,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:19,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:19,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:19,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:20,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:20,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 159 transitions, 1585 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 13:27:20,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:20,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:20,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:20,735 INFO L124 PetriNetUnfolderBase]: 2225/3315 cut-off events. [2024-06-14 13:27:20,736 INFO L125 PetriNetUnfolderBase]: For 64018/64018 co-relation queries the response was YES. [2024-06-14 13:27:20,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20083 conditions, 3315 events. 2225/3315 cut-off events. For 64018/64018 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15293 event pairs, 587 based on Foata normal form. 4/3319 useless extension candidates. Maximal degree in co-relation 20020. Up to 2939 conditions per place. [2024-06-14 13:27:20,763 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 135 selfloop transitions, 53 changer transitions 0/191 dead transitions. [2024-06-14 13:27:20,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 191 transitions, 2068 flow [2024-06-14 13:27:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:27:20,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 13:27:20,764 INFO L175 Difference]: Start difference. First operand has 131 places, 159 transitions, 1585 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:27:20,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 191 transitions, 2068 flow [2024-06-14 13:27:20,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 191 transitions, 1916 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:20,817 INFO L231 Difference]: Finished difference. Result has 134 places, 160 transitions, 1563 flow [2024-06-14 13:27:20,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1563, PETRI_PLACES=134, PETRI_TRANSITIONS=160} [2024-06-14 13:27:20,818 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-14 13:27:20,818 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 160 transitions, 1563 flow [2024-06-14 13:27:20,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 13:27:20,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:20,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:20,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:27:20,818 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)] === [2024-06-14 13:27:20,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:20,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2142026778, now seen corresponding path program 1 times [2024-06-14 13:27:20,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:20,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930494363] [2024-06-14 13:27:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:20,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:21,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:21,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:21,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930494363] [2024-06-14 13:27:21,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930494363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:21,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:21,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:21,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852726492] [2024-06-14 13:27:21,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:21,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:21,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:21,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:21,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:21,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:21,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 160 transitions, 1563 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:21,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:21,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:21,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:22,528 INFO L124 PetriNetUnfolderBase]: 2259/3372 cut-off events. [2024-06-14 13:27:22,528 INFO L125 PetriNetUnfolderBase]: For 69605/69617 co-relation queries the response was YES. [2024-06-14 13:27:22,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20376 conditions, 3372 events. 2259/3372 cut-off events. For 69605/69617 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15667 event pairs, 683 based on Foata normal form. 20/3392 useless extension candidates. Maximal degree in co-relation 20312. Up to 3011 conditions per place. [2024-06-14 13:27:22,556 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 137 selfloop transitions, 52 changer transitions 0/192 dead transitions. [2024-06-14 13:27:22,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 192 transitions, 2065 flow [2024-06-14 13:27:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:22,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:27:22,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-14 13:27:22,573 INFO L175 Difference]: Start difference. First operand has 134 places, 160 transitions, 1563 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:27:22,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 192 transitions, 2065 flow [2024-06-14 13:27:22,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 192 transitions, 1982 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:22,624 INFO L231 Difference]: Finished difference. Result has 137 places, 162 transitions, 1623 flow [2024-06-14 13:27:22,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1623, PETRI_PLACES=137, PETRI_TRANSITIONS=162} [2024-06-14 13:27:22,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-14 13:27:22,625 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 162 transitions, 1623 flow [2024-06-14 13:27:22,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:22,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:22,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:22,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:27:22,625 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)] === [2024-06-14 13:27:22,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:22,626 INFO L85 PathProgramCache]: Analyzing trace with hash -877891394, now seen corresponding path program 2 times [2024-06-14 13:27:22,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:22,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183611335] [2024-06-14 13:27:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:22,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:23,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:23,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183611335] [2024-06-14 13:27:23,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183611335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:23,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:23,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:23,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105606553] [2024-06-14 13:27:23,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:23,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:23,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:23,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:23,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:23,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:23,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 162 transitions, 1623 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:23,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:23,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:23,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:24,168 INFO L124 PetriNetUnfolderBase]: 2293/3426 cut-off events. [2024-06-14 13:27:24,168 INFO L125 PetriNetUnfolderBase]: For 75426/75438 co-relation queries the response was YES. [2024-06-14 13:27:24,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21088 conditions, 3426 events. 2293/3426 cut-off events. For 75426/75438 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15939 event pairs, 728 based on Foata normal form. 20/3446 useless extension candidates. Maximal degree in co-relation 21023. Up to 3075 conditions per place. [2024-06-14 13:27:24,195 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 141 selfloop transitions, 50 changer transitions 0/194 dead transitions. [2024-06-14 13:27:24,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 194 transitions, 2133 flow [2024-06-14 13:27:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:27:24,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-14 13:27:24,197 INFO L175 Difference]: Start difference. First operand has 137 places, 162 transitions, 1623 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:27:24,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 194 transitions, 2133 flow [2024-06-14 13:27:24,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 194 transitions, 2018 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:24,253 INFO L231 Difference]: Finished difference. Result has 139 places, 164 transitions, 1647 flow [2024-06-14 13:27:24,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1647, PETRI_PLACES=139, PETRI_TRANSITIONS=164} [2024-06-14 13:27:24,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-14 13:27:24,254 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 164 transitions, 1647 flow [2024-06-14 13:27:24,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:24,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:24,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:24,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:27:24,254 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)] === [2024-06-14 13:27:24,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:24,255 INFO L85 PathProgramCache]: Analyzing trace with hash -861773714, now seen corresponding path program 3 times [2024-06-14 13:27:24,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:24,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840975714] [2024-06-14 13:27:24,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:24,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:25,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:25,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840975714] [2024-06-14 13:27:25,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840975714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:25,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:25,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:25,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307756946] [2024-06-14 13:27:25,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:25,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:25,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:25,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:25,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:25,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 164 transitions, 1647 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:25,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:25,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:25,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:25,843 INFO L124 PetriNetUnfolderBase]: 2277/3402 cut-off events. [2024-06-14 13:27:25,843 INFO L125 PetriNetUnfolderBase]: For 79158/79170 co-relation queries the response was YES. [2024-06-14 13:27:25,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21142 conditions, 3402 events. 2277/3402 cut-off events. For 79158/79170 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15911 event pairs, 665 based on Foata normal form. 20/3422 useless extension candidates. Maximal degree in co-relation 21076. Up to 2931 conditions per place. [2024-06-14 13:27:25,870 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 141 selfloop transitions, 53 changer transitions 0/197 dead transitions. [2024-06-14 13:27:25,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 197 transitions, 2169 flow [2024-06-14 13:27:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:25,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:25,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:27:25,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-14 13:27:25,873 INFO L175 Difference]: Start difference. First operand has 139 places, 164 transitions, 1647 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:27:25,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 197 transitions, 2169 flow [2024-06-14 13:27:25,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 197 transitions, 2048 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:25,939 INFO L231 Difference]: Finished difference. Result has 141 places, 166 transitions, 1675 flow [2024-06-14 13:27:25,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1675, PETRI_PLACES=141, PETRI_TRANSITIONS=166} [2024-06-14 13:27:25,939 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-14 13:27:25,939 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 166 transitions, 1675 flow [2024-06-14 13:27:25,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:25,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:25,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:25,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:27:25,940 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)] === [2024-06-14 13:27:25,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:25,941 INFO L85 PathProgramCache]: Analyzing trace with hash -870987720, now seen corresponding path program 5 times [2024-06-14 13:27:25,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:25,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785122224] [2024-06-14 13:27:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:25,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:27,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:27,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785122224] [2024-06-14 13:27:27,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785122224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:27,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:27,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:27,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544960180] [2024-06-14 13:27:27,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:27,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:27,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:27,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:27,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:27,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:27,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 166 transitions, 1675 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:27,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:27,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:27,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:27,931 INFO L124 PetriNetUnfolderBase]: 2321/3469 cut-off events. [2024-06-14 13:27:27,931 INFO L125 PetriNetUnfolderBase]: For 87201/87209 co-relation queries the response was YES. [2024-06-14 13:27:27,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21828 conditions, 3469 events. 2321/3469 cut-off events. For 87201/87209 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16274 event pairs, 562 based on Foata normal form. 12/3481 useless extension candidates. Maximal degree in co-relation 21761. Up to 2741 conditions per place. [2024-06-14 13:27:27,953 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 132 selfloop transitions, 74 changer transitions 0/209 dead transitions. [2024-06-14 13:27:27,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 209 transitions, 2415 flow [2024-06-14 13:27:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:27,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:27:27,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:27:27,955 INFO L175 Difference]: Start difference. First operand has 141 places, 166 transitions, 1675 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:27:27,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 209 transitions, 2415 flow [2024-06-14 13:27:28,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 209 transitions, 2284 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:28,009 INFO L231 Difference]: Finished difference. Result has 144 places, 176 transitions, 1860 flow [2024-06-14 13:27:28,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1860, PETRI_PLACES=144, PETRI_TRANSITIONS=176} [2024-06-14 13:27:28,010 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-14 13:27:28,010 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 176 transitions, 1860 flow [2024-06-14 13:27:28,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:28,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:28,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:28,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:27:28,010 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)] === [2024-06-14 13:27:28,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:28,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1401201108, now seen corresponding path program 6 times [2024-06-14 13:27:28,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:28,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360584260] [2024-06-14 13:27:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:28,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:29,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:29,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360584260] [2024-06-14 13:27:29,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360584260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:29,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:29,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:29,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99660572] [2024-06-14 13:27:29,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:29,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:29,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:29,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:29,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:29,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:29,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 176 transitions, 1860 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 13:27:29,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:29,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:29,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:30,276 INFO L124 PetriNetUnfolderBase]: 2343/3501 cut-off events. [2024-06-14 13:27:30,276 INFO L125 PetriNetUnfolderBase]: For 94420/94428 co-relation queries the response was YES. [2024-06-14 13:27:30,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22875 conditions, 3501 events. 2343/3501 cut-off events. For 94420/94428 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16444 event pairs, 588 based on Foata normal form. 8/3509 useless extension candidates. Maximal degree in co-relation 22806. Up to 2959 conditions per place. [2024-06-14 13:27:30,320 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 145 selfloop transitions, 69 changer transitions 0/217 dead transitions. [2024-06-14 13:27:30,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 217 transitions, 2634 flow [2024-06-14 13:27:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:27:30,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:27:30,322 INFO L175 Difference]: Start difference. First operand has 144 places, 176 transitions, 1860 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:27:30,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 217 transitions, 2634 flow [2024-06-14 13:27:30,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 217 transitions, 2520 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:30,451 INFO L231 Difference]: Finished difference. Result has 150 places, 184 transitions, 2060 flow [2024-06-14 13:27:30,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2060, PETRI_PLACES=150, PETRI_TRANSITIONS=184} [2024-06-14 13:27:30,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-14 13:27:30,453 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 184 transitions, 2060 flow [2024-06-14 13:27:30,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 13:27:30,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:30,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:30,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:27:30,453 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:30,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:30,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1401195528, now seen corresponding path program 7 times [2024-06-14 13:27:30,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:30,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802349421] [2024-06-14 13:27:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:30,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:31,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:31,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802349421] [2024-06-14 13:27:31,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802349421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:31,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:31,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:31,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293717063] [2024-06-14 13:27:31,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:31,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:31,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:31,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:31,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:31,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:31,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 184 transitions, 2060 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 13:27:31,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:31,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:31,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:32,462 INFO L124 PetriNetUnfolderBase]: 2333/3487 cut-off events. [2024-06-14 13:27:32,462 INFO L125 PetriNetUnfolderBase]: For 99182/99190 co-relation queries the response was YES. [2024-06-14 13:27:32,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23261 conditions, 3487 events. 2333/3487 cut-off events. For 99182/99190 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16341 event pairs, 593 based on Foata normal form. 8/3495 useless extension candidates. Maximal degree in co-relation 23189. Up to 2951 conditions per place. [2024-06-14 13:27:32,485 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 140 selfloop transitions, 70 changer transitions 0/213 dead transitions. [2024-06-14 13:27:32,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 213 transitions, 2566 flow [2024-06-14 13:27:32,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:32,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:27:32,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 13:27:32,487 INFO L175 Difference]: Start difference. First operand has 150 places, 184 transitions, 2060 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:27:32,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 213 transitions, 2566 flow [2024-06-14 13:27:32,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 213 transitions, 2419 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:32,576 INFO L231 Difference]: Finished difference. Result has 155 places, 184 transitions, 2061 flow [2024-06-14 13:27:32,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2061, PETRI_PLACES=155, PETRI_TRANSITIONS=184} [2024-06-14 13:27:32,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-14 13:27:32,577 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 184 transitions, 2061 flow [2024-06-14 13:27:32,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 13:27:32,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:32,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:32,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:27:32,578 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)] === [2024-06-14 13:27:32,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:32,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1895652456, now seen corresponding path program 1 times [2024-06-14 13:27:32,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:32,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932956822] [2024-06-14 13:27:32,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:32,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:33,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:33,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932956822] [2024-06-14 13:27:33,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932956822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:33,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:33,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:33,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682854253] [2024-06-14 13:27:33,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:33,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:33,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:33,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:33,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:33,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:27:33,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 184 transitions, 2061 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) [2024-06-14 13:27:33,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:33,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:27:33,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:34,669 INFO L124 PetriNetUnfolderBase]: 2244/3385 cut-off events. [2024-06-14 13:27:34,669 INFO L125 PetriNetUnfolderBase]: For 109133/109176 co-relation queries the response was YES. [2024-06-14 13:27:34,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23243 conditions, 3385 events. 2244/3385 cut-off events. For 109133/109176 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16153 event pairs, 398 based on Foata normal form. 11/3338 useless extension candidates. Maximal degree in co-relation 23169. Up to 3046 conditions per place. [2024-06-14 13:27:34,700 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 145 selfloop transitions, 31 changer transitions 0/218 dead transitions. [2024-06-14 13:27:34,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 218 transitions, 2543 flow [2024-06-14 13:27:34,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:34,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:27:34,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:27:34,701 INFO L175 Difference]: Start difference. First operand has 155 places, 184 transitions, 2061 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:27:34,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 218 transitions, 2543 flow [2024-06-14 13:27:34,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 218 transitions, 2415 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:34,799 INFO L231 Difference]: Finished difference. Result has 158 places, 186 transitions, 2036 flow [2024-06-14 13:27:34,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2036, PETRI_PLACES=158, PETRI_TRANSITIONS=186} [2024-06-14 13:27:34,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-14 13:27:34,800 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 186 transitions, 2036 flow [2024-06-14 13:27:34,800 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) [2024-06-14 13:27:34,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:34,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:34,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:27:34,801 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)] === [2024-06-14 13:27:34,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:34,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1687915156, now seen corresponding path program 2 times [2024-06-14 13:27:34,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:34,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402908102] [2024-06-14 13:27:34,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:34,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:36,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:36,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402908102] [2024-06-14 13:27:36,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402908102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:36,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:36,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:36,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222976421] [2024-06-14 13:27:36,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:36,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:36,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:36,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:36,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:36,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:27:36,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 186 transitions, 2036 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) [2024-06-14 13:27:36,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:36,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:27:36,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:37,278 INFO L124 PetriNetUnfolderBase]: 2259/3412 cut-off events. [2024-06-14 13:27:37,278 INFO L125 PetriNetUnfolderBase]: For 116966/117008 co-relation queries the response was YES. [2024-06-14 13:27:37,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23677 conditions, 3412 events. 2259/3412 cut-off events. For 116966/117008 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16345 event pairs, 510 based on Foata normal form. 9/3361 useless extension candidates. Maximal degree in co-relation 23602. Up to 3055 conditions per place. [2024-06-14 13:27:37,306 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 142 selfloop transitions, 36 changer transitions 0/220 dead transitions. [2024-06-14 13:27:37,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 220 transitions, 2526 flow [2024-06-14 13:27:37,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:37,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:37,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:27:37,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 13:27:37,308 INFO L175 Difference]: Start difference. First operand has 158 places, 186 transitions, 2036 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:27:37,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 220 transitions, 2526 flow [2024-06-14 13:27:37,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 220 transitions, 2441 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:37,388 INFO L231 Difference]: Finished difference. Result has 160 places, 188 transitions, 2070 flow [2024-06-14 13:27:37,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2070, PETRI_PLACES=160, PETRI_TRANSITIONS=188} [2024-06-14 13:27:37,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-14 13:27:37,389 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 188 transitions, 2070 flow [2024-06-14 13:27:37,389 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) [2024-06-14 13:27:37,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:37,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:37,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:27:37,390 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)] === [2024-06-14 13:27:37,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:37,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1690716626, now seen corresponding path program 1 times [2024-06-14 13:27:37,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:37,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730246663] [2024-06-14 13:27:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:37,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:38,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:38,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730246663] [2024-06-14 13:27:38,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730246663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:38,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:38,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:27:38,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688286104] [2024-06-14 13:27:38,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:38,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:27:38,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:38,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:27:38,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:27:38,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:38,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 188 transitions, 2070 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:38,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:38,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:38,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:39,929 INFO L124 PetriNetUnfolderBase]: 2405/3590 cut-off events. [2024-06-14 13:27:39,930 INFO L125 PetriNetUnfolderBase]: For 119524/119528 co-relation queries the response was YES. [2024-06-14 13:27:39,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24794 conditions, 3590 events. 2405/3590 cut-off events. For 119524/119528 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16903 event pairs, 556 based on Foata normal form. 8/3598 useless extension candidates. Maximal degree in co-relation 24718. Up to 3320 conditions per place. [2024-06-14 13:27:39,978 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 186 selfloop transitions, 39 changer transitions 0/228 dead transitions. [2024-06-14 13:27:39,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 228 transitions, 2682 flow [2024-06-14 13:27:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:39,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:27:39,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-14 13:27:39,985 INFO L175 Difference]: Start difference. First operand has 160 places, 188 transitions, 2070 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:27:39,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 228 transitions, 2682 flow [2024-06-14 13:27:40,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 228 transitions, 2585 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:40,094 INFO L231 Difference]: Finished difference. Result has 163 places, 191 transitions, 2114 flow [2024-06-14 13:27:40,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2114, PETRI_PLACES=163, PETRI_TRANSITIONS=191} [2024-06-14 13:27:40,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-14 13:27:40,095 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 191 transitions, 2114 flow [2024-06-14 13:27:40,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:40,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:40,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:40,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:27:40,096 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)] === [2024-06-14 13:27:40,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:40,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1806007796, now seen corresponding path program 2 times [2024-06-14 13:27:40,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:40,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936766197] [2024-06-14 13:27:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:40,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:41,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:41,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936766197] [2024-06-14 13:27:41,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936766197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:41,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:41,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:27:41,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539775971] [2024-06-14 13:27:41,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:41,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:27:41,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:41,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:27:41,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:27:41,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:41,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 191 transitions, 2114 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:41,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:41,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:41,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:42,514 INFO L124 PetriNetUnfolderBase]: 2427/3623 cut-off events. [2024-06-14 13:27:42,515 INFO L125 PetriNetUnfolderBase]: For 126079/126079 co-relation queries the response was YES. [2024-06-14 13:27:42,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25184 conditions, 3623 events. 2427/3623 cut-off events. For 126079/126079 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17094 event pairs, 543 based on Foata normal form. 4/3627 useless extension candidates. Maximal degree in co-relation 25107. Up to 3224 conditions per place. [2024-06-14 13:27:42,544 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 172 selfloop transitions, 54 changer transitions 0/229 dead transitions. [2024-06-14 13:27:42,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 229 transitions, 2722 flow [2024-06-14 13:27:42,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:42,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:42,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:27:42,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:27:42,546 INFO L175 Difference]: Start difference. First operand has 163 places, 191 transitions, 2114 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:27:42,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 229 transitions, 2722 flow [2024-06-14 13:27:42,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 229 transitions, 2613 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:27:42,651 INFO L231 Difference]: Finished difference. Result has 165 places, 194 transitions, 2181 flow [2024-06-14 13:27:42,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2005, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2181, PETRI_PLACES=165, PETRI_TRANSITIONS=194} [2024-06-14 13:27:42,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-14 13:27:42,652 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 194 transitions, 2181 flow [2024-06-14 13:27:42,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:42,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:42,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:42,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:27:42,652 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)] === [2024-06-14 13:27:42,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:42,653 INFO L85 PathProgramCache]: Analyzing trace with hash -38632186, now seen corresponding path program 3 times [2024-06-14 13:27:42,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:42,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315437096] [2024-06-14 13:27:42,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:42,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:44,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:44,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315437096] [2024-06-14 13:27:44,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315437096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:44,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:44,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:27:44,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935328691] [2024-06-14 13:27:44,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:44,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:27:44,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:44,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:27:44,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:27:44,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:27:44,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 194 transitions, 2181 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) [2024-06-14 13:27:44,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:44,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:27:44,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:45,345 INFO L124 PetriNetUnfolderBase]: 2321/3507 cut-off events. [2024-06-14 13:27:45,346 INFO L125 PetriNetUnfolderBase]: For 141402/141443 co-relation queries the response was YES. [2024-06-14 13:27:45,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25134 conditions, 3507 events. 2321/3507 cut-off events. For 141402/141443 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16968 event pairs, 504 based on Foata normal form. 8/3453 useless extension candidates. Maximal degree in co-relation 25056. Up to 3076 conditions per place. [2024-06-14 13:27:45,372 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 134 selfloop transitions, 48 changer transitions 0/226 dead transitions. [2024-06-14 13:27:45,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 226 transitions, 2671 flow [2024-06-14 13:27:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:27:45,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 13:27:45,374 INFO L175 Difference]: Start difference. First operand has 165 places, 194 transitions, 2181 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:27:45,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 226 transitions, 2671 flow [2024-06-14 13:27:45,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 226 transitions, 2525 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:27:45,500 INFO L231 Difference]: Finished difference. Result has 166 places, 196 transitions, 2181 flow [2024-06-14 13:27:45,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2181, PETRI_PLACES=166, PETRI_TRANSITIONS=196} [2024-06-14 13:27:45,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-14 13:27:45,500 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 196 transitions, 2181 flow [2024-06-14 13:27:45,501 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) [2024-06-14 13:27:45,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:45,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:45,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:27:45,501 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)] === [2024-06-14 13:27:45,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:45,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1660358452, now seen corresponding path program 3 times [2024-06-14 13:27:45,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:45,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305820002] [2024-06-14 13:27:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:45,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:46,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305820002] [2024-06-14 13:27:46,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305820002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:46,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:46,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:27:46,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413540470] [2024-06-14 13:27:46,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:46,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:27:46,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:46,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:27:46,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:27:46,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:46,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 196 transitions, 2181 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:46,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:46,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:46,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:47,861 INFO L124 PetriNetUnfolderBase]: 2474/3694 cut-off events. [2024-06-14 13:27:47,861 INFO L125 PetriNetUnfolderBase]: For 142841/142841 co-relation queries the response was YES. [2024-06-14 13:27:47,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26232 conditions, 3694 events. 2474/3694 cut-off events. For 142841/142841 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17509 event pairs, 542 based on Foata normal form. 4/3698 useless extension candidates. Maximal degree in co-relation 26153. Up to 3295 conditions per place. [2024-06-14 13:27:47,899 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 56 changer transitions 0/235 dead transitions. [2024-06-14 13:27:47,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 235 transitions, 2811 flow [2024-06-14 13:27:47,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:47,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:27:47,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:27:47,901 INFO L175 Difference]: Start difference. First operand has 166 places, 196 transitions, 2181 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:27:47,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 235 transitions, 2811 flow [2024-06-14 13:27:48,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 235 transitions, 2685 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:48,037 INFO L231 Difference]: Finished difference. Result has 169 places, 199 transitions, 2241 flow [2024-06-14 13:27:48,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2241, PETRI_PLACES=169, PETRI_TRANSITIONS=199} [2024-06-14 13:27:48,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-14 13:27:48,037 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 199 transitions, 2241 flow [2024-06-14 13:27:48,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:48,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:48,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:48,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:27:48,038 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:48,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:48,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1806187286, now seen corresponding path program 4 times [2024-06-14 13:27:48,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:48,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781918217] [2024-06-14 13:27:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:48,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:49,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:49,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781918217] [2024-06-14 13:27:49,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781918217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:49,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:49,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:49,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986093438] [2024-06-14 13:27:49,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:49,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:49,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:49,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:49,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:49,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:49,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 199 transitions, 2241 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:49,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:49,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:49,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:49,988 INFO L124 PetriNetUnfolderBase]: 2496/3732 cut-off events. [2024-06-14 13:27:49,988 INFO L125 PetriNetUnfolderBase]: For 150938/150946 co-relation queries the response was YES. [2024-06-14 13:27:50,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26687 conditions, 3732 events. 2496/3732 cut-off events. For 150938/150946 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17736 event pairs, 546 based on Foata normal form. 8/3740 useless extension candidates. Maximal degree in co-relation 26607. Up to 2975 conditions per place. [2024-06-14 13:27:50,028 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 136 selfloop transitions, 96 changer transitions 0/235 dead transitions. [2024-06-14 13:27:50,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 235 transitions, 3003 flow [2024-06-14 13:27:50,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:27:50,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:27:50,030 INFO L175 Difference]: Start difference. First operand has 169 places, 199 transitions, 2241 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:27:50,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 235 transitions, 3003 flow [2024-06-14 13:27:50,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 235 transitions, 2847 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 13:27:50,182 INFO L231 Difference]: Finished difference. Result has 170 places, 202 transitions, 2352 flow [2024-06-14 13:27:50,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2352, PETRI_PLACES=170, PETRI_TRANSITIONS=202} [2024-06-14 13:27:50,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-14 13:27:50,184 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 202 transitions, 2352 flow [2024-06-14 13:27:50,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:50,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:50,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:50,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:27:50,184 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)] === [2024-06-14 13:27:50,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:50,185 INFO L85 PathProgramCache]: Analyzing trace with hash -436681217, now seen corresponding path program 1 times [2024-06-14 13:27:50,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:50,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416835990] [2024-06-14 13:27:50,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:50,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:51,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:51,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416835990] [2024-06-14 13:27:51,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416835990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:51,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:51,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:51,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521593038] [2024-06-14 13:27:51,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:51,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:51,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:51,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:51,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:51,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:51,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 202 transitions, 2352 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:51,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:51,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:51,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:51,939 INFO L124 PetriNetUnfolderBase]: 2526/3767 cut-off events. [2024-06-14 13:27:51,939 INFO L125 PetriNetUnfolderBase]: For 157711/157715 co-relation queries the response was YES. [2024-06-14 13:27:51,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27261 conditions, 3767 events. 2526/3767 cut-off events. For 157711/157715 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 17865 event pairs, 693 based on Foata normal form. 8/3775 useless extension candidates. Maximal degree in co-relation 27180. Up to 3629 conditions per place. [2024-06-14 13:27:51,973 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 201 selfloop transitions, 33 changer transitions 0/237 dead transitions. [2024-06-14 13:27:51,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 237 transitions, 3085 flow [2024-06-14 13:27:51,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:51,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 13:27:51,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-14 13:27:51,976 INFO L175 Difference]: Start difference. First operand has 170 places, 202 transitions, 2352 flow. Second operand 7 states and 118 transitions. [2024-06-14 13:27:51,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 237 transitions, 3085 flow [2024-06-14 13:27:52,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 237 transitions, 2857 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:52,128 INFO L231 Difference]: Finished difference. Result has 173 places, 213 transitions, 2332 flow [2024-06-14 13:27:52,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2124, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2332, PETRI_PLACES=173, PETRI_TRANSITIONS=213} [2024-06-14 13:27:52,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-14 13:27:52,129 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 213 transitions, 2332 flow [2024-06-14 13:27:52,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:52,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:52,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:52,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:27:52,130 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:52,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:52,130 INFO L85 PathProgramCache]: Analyzing trace with hash 487384806, now seen corresponding path program 4 times [2024-06-14 13:27:52,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:52,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721304144] [2024-06-14 13:27:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:52,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:53,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:53,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721304144] [2024-06-14 13:27:53,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721304144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:53,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:53,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:53,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035392029] [2024-06-14 13:27:53,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:53,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:53,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:53,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:53,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:53,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 13:27:53,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 213 transitions, 2332 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) [2024-06-14 13:27:53,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:53,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 13:27:53,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:54,469 INFO L124 PetriNetUnfolderBase]: 2384/3602 cut-off events. [2024-06-14 13:27:54,469 INFO L125 PetriNetUnfolderBase]: For 170180/170227 co-relation queries the response was YES. [2024-06-14 13:27:54,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26405 conditions, 3602 events. 2384/3602 cut-off events. For 170180/170227 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17404 event pairs, 520 based on Foata normal form. 11/3548 useless extension candidates. Maximal degree in co-relation 26322. Up to 3097 conditions per place. [2024-06-14 13:27:54,498 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 137 selfloop transitions, 61 changer transitions 0/244 dead transitions. [2024-06-14 13:27:54,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 244 transitions, 2856 flow [2024-06-14 13:27:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:54,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:27:54,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 13:27:54,502 INFO L175 Difference]: Start difference. First operand has 173 places, 213 transitions, 2332 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:27:54,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 244 transitions, 2856 flow [2024-06-14 13:27:54,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 244 transitions, 2814 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 13:27:54,650 INFO L231 Difference]: Finished difference. Result has 179 places, 215 transitions, 2466 flow [2024-06-14 13:27:54,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2466, PETRI_PLACES=179, PETRI_TRANSITIONS=215} [2024-06-14 13:27:54,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-14 13:27:54,652 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 215 transitions, 2466 flow [2024-06-14 13:27:54,652 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) [2024-06-14 13:27:54,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:54,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:54,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:27:54,653 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)] === [2024-06-14 13:27:54,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:54,653 INFO L85 PathProgramCache]: Analyzing trace with hash 487562746, now seen corresponding path program 5 times [2024-06-14 13:27:54,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:54,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208619212] [2024-06-14 13:27:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:54,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:56,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:56,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208619212] [2024-06-14 13:27:56,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208619212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:56,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:56,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:56,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744088656] [2024-06-14 13:27:56,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:56,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:56,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:56,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:56,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:56,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:56,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 215 transitions, 2466 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:27:56,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:56,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:56,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:57,477 INFO L124 PetriNetUnfolderBase]: 2535/3787 cut-off events. [2024-06-14 13:27:57,478 INFO L125 PetriNetUnfolderBase]: For 171408/171418 co-relation queries the response was YES. [2024-06-14 13:27:57,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27747 conditions, 3787 events. 2535/3787 cut-off events. For 171408/171418 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18048 event pairs, 553 based on Foata normal form. 9/3796 useless extension candidates. Maximal degree in co-relation 27662. Up to 3228 conditions per place. [2024-06-14 13:27:57,513 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 179 selfloop transitions, 72 changer transitions 0/254 dead transitions. [2024-06-14 13:27:57,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 254 transitions, 3130 flow [2024-06-14 13:27:57,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:27:57,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 13:27:57,515 INFO L175 Difference]: Start difference. First operand has 179 places, 215 transitions, 2466 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:27:57,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 254 transitions, 3130 flow [2024-06-14 13:27:57,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 254 transitions, 2974 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:57,667 INFO L231 Difference]: Finished difference. Result has 182 places, 218 transitions, 2524 flow [2024-06-14 13:27:57,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2310, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2524, PETRI_PLACES=182, PETRI_TRANSITIONS=218} [2024-06-14 13:27:57,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-14 13:27:57,667 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 218 transitions, 2524 flow [2024-06-14 13:27:57,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:27:57,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:57,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:57,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:27:57,668 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)] === [2024-06-14 13:27:57,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:57,668 INFO L85 PathProgramCache]: Analyzing trace with hash -144599926, now seen corresponding path program 6 times [2024-06-14 13:27:57,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:57,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042259626] [2024-06-14 13:27:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:57,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:59,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:59,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042259626] [2024-06-14 13:27:59,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042259626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:59,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:59,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:59,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753969068] [2024-06-14 13:27:59,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:59,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:59,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:59,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:59,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:59,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:27:59,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 218 transitions, 2524 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:27:59,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:59,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:27:59,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:00,192 INFO L124 PetriNetUnfolderBase]: 2557/3819 cut-off events. [2024-06-14 13:28:00,192 INFO L125 PetriNetUnfolderBase]: For 179491/179501 co-relation queries the response was YES. [2024-06-14 13:28:00,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28198 conditions, 3819 events. 2557/3819 cut-off events. For 179491/179501 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18147 event pairs, 545 based on Foata normal form. 9/3828 useless extension candidates. Maximal degree in co-relation 28112. Up to 3000 conditions per place. [2024-06-14 13:28:00,243 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 157 selfloop transitions, 98 changer transitions 0/258 dead transitions. [2024-06-14 13:28:00,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 258 transitions, 3354 flow [2024-06-14 13:28:00,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:28:00,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 13:28:00,245 INFO L175 Difference]: Start difference. First operand has 182 places, 218 transitions, 2524 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:28:00,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 258 transitions, 3354 flow [2024-06-14 13:28:00,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 258 transitions, 3170 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 13:28:00,493 INFO L231 Difference]: Finished difference. Result has 184 places, 221 transitions, 2606 flow [2024-06-14 13:28:00,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2606, PETRI_PLACES=184, PETRI_TRANSITIONS=221} [2024-06-14 13:28:00,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-14 13:28:00,494 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 221 transitions, 2606 flow [2024-06-14 13:28:00,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:28:00,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:00,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:00,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:28:00,495 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)] === [2024-06-14 13:28:00,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:00,495 INFO L85 PathProgramCache]: Analyzing trace with hash 487389766, now seen corresponding path program 7 times [2024-06-14 13:28:00,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:00,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505442972] [2024-06-14 13:28:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:00,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:01,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:01,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505442972] [2024-06-14 13:28:01,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505442972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:01,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:01,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:01,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919016985] [2024-06-14 13:28:01,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:01,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:01,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:01,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:01,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:01,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:01,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 221 transitions, 2606 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:28:01,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:01,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:01,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:02,859 INFO L124 PetriNetUnfolderBase]: 2547/3805 cut-off events. [2024-06-14 13:28:02,859 INFO L125 PetriNetUnfolderBase]: For 184823/184833 co-relation queries the response was YES. [2024-06-14 13:28:02,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28219 conditions, 3805 events. 2547/3805 cut-off events. For 184823/184833 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18104 event pairs, 560 based on Foata normal form. 9/3814 useless extension candidates. Maximal degree in co-relation 28132. Up to 3246 conditions per place. [2024-06-14 13:28:02,897 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 179 selfloop transitions, 73 changer transitions 0/255 dead transitions. [2024-06-14 13:28:02,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 255 transitions, 3210 flow [2024-06-14 13:28:02,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:28:02,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-14 13:28:02,899 INFO L175 Difference]: Start difference. First operand has 184 places, 221 transitions, 2606 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:28:02,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 255 transitions, 3210 flow [2024-06-14 13:28:03,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 255 transitions, 3001 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 13:28:03,158 INFO L231 Difference]: Finished difference. Result has 187 places, 221 transitions, 2551 flow [2024-06-14 13:28:03,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2551, PETRI_PLACES=187, PETRI_TRANSITIONS=221} [2024-06-14 13:28:03,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-14 13:28:03,159 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 221 transitions, 2551 flow [2024-06-14 13:28:03,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:28:03,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:03,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:03,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:28:03,160 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)] === [2024-06-14 13:28:03,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:03,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1033442119, now seen corresponding path program 2 times [2024-06-14 13:28:03,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:03,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517863254] [2024-06-14 13:28:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:03,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:04,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:04,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517863254] [2024-06-14 13:28:04,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517863254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:04,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:04,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:28:04,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447725827] [2024-06-14 13:28:04,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:04,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:28:04,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:04,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:28:04,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:28:04,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:04,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 221 transitions, 2551 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:04,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:04,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:04,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:05,024 INFO L124 PetriNetUnfolderBase]: 2567/3826 cut-off events. [2024-06-14 13:28:05,024 INFO L125 PetriNetUnfolderBase]: For 192115/192119 co-relation queries the response was YES. [2024-06-14 13:28:05,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28355 conditions, 3826 events. 2567/3826 cut-off events. For 192115/192119 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 18244 event pairs, 700 based on Foata normal form. 8/3834 useless extension candidates. Maximal degree in co-relation 28267. Up to 3716 conditions per place. [2024-06-14 13:28:05,060 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 211 selfloop transitions, 28 changer transitions 0/242 dead transitions. [2024-06-14 13:28:05,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 242 transitions, 3129 flow [2024-06-14 13:28:05,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:28:05,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:28:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-14 13:28:05,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-14 13:28:05,061 INFO L175 Difference]: Start difference. First operand has 187 places, 221 transitions, 2551 flow. Second operand 5 states and 92 transitions. [2024-06-14 13:28:05,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 242 transitions, 3129 flow [2024-06-14 13:28:05,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 242 transitions, 2865 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-14 13:28:05,246 INFO L231 Difference]: Finished difference. Result has 183 places, 224 transitions, 2413 flow [2024-06-14 13:28:05,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2413, PETRI_PLACES=183, PETRI_TRANSITIONS=224} [2024-06-14 13:28:05,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-14 13:28:05,247 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 224 transitions, 2413 flow [2024-06-14 13:28:05,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:05,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:05,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:05,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:28:05,247 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:05,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:05,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1081117085, now seen corresponding path program 3 times [2024-06-14 13:28:05,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:05,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012451817] [2024-06-14 13:28:05,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:05,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:06,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:06,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012451817] [2024-06-14 13:28:06,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012451817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:06,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:06,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:28:06,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031891242] [2024-06-14 13:28:06,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:06,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:28:06,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:06,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:28:06,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:28:06,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:06,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 224 transitions, 2413 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:06,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:06,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:06,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:07,437 INFO L124 PetriNetUnfolderBase]: 2555/3810 cut-off events. [2024-06-14 13:28:07,438 INFO L125 PetriNetUnfolderBase]: For 195329/195333 co-relation queries the response was YES. [2024-06-14 13:28:07,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27831 conditions, 3810 events. 2555/3810 cut-off events. For 195329/195333 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18061 event pairs, 694 based on Foata normal form. 8/3818 useless extension candidates. Maximal degree in co-relation 27742. Up to 3668 conditions per place. [2024-06-14 13:28:07,493 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 208 selfloop transitions, 34 changer transitions 0/245 dead transitions. [2024-06-14 13:28:07,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 245 transitions, 2965 flow [2024-06-14 13:28:07,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:28:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:28:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 13:28:07,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:28:07,495 INFO L175 Difference]: Start difference. First operand has 183 places, 224 transitions, 2413 flow. Second operand 6 states and 105 transitions. [2024-06-14 13:28:07,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 245 transitions, 2965 flow [2024-06-14 13:28:07,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 245 transitions, 2891 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 13:28:07,844 INFO L231 Difference]: Finished difference. Result has 186 places, 224 transitions, 2419 flow [2024-06-14 13:28:07,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2419, PETRI_PLACES=186, PETRI_TRANSITIONS=224} [2024-06-14 13:28:07,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-14 13:28:07,845 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 224 transitions, 2419 flow [2024-06-14 13:28:07,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:07,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:07,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:07,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:28:07,846 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:07,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:07,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1811834565, now seen corresponding path program 1 times [2024-06-14 13:28:07,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:07,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641192282] [2024-06-14 13:28:07,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:07,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:08,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:08,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641192282] [2024-06-14 13:28:08,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641192282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:08,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:08,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:08,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651472806] [2024-06-14 13:28:08,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:08,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:08,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:08,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:08,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:08,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:08,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 224 transitions, 2419 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:08,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:08,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:08,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:09,667 INFO L124 PetriNetUnfolderBase]: 2586/3865 cut-off events. [2024-06-14 13:28:09,667 INFO L125 PetriNetUnfolderBase]: For 206498/206498 co-relation queries the response was YES. [2024-06-14 13:28:09,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28395 conditions, 3865 events. 2586/3865 cut-off events. For 206498/206498 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18643 event pairs, 1122 based on Foata normal form. 3/3868 useless extension candidates. Maximal degree in co-relation 28305. Up to 3773 conditions per place. [2024-06-14 13:28:09,710 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 225 selfloop transitions, 25 changer transitions 0/253 dead transitions. [2024-06-14 13:28:09,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 253 transitions, 3212 flow [2024-06-14 13:28:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:09,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:28:09,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 13:28:09,715 INFO L175 Difference]: Start difference. First operand has 186 places, 224 transitions, 2419 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:28:09,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 253 transitions, 3212 flow [2024-06-14 13:28:09,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 253 transitions, 3129 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:09,895 INFO L231 Difference]: Finished difference. Result has 190 places, 232 transitions, 2514 flow [2024-06-14 13:28:09,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2514, PETRI_PLACES=190, PETRI_TRANSITIONS=232} [2024-06-14 13:28:09,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-14 13:28:09,896 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 232 transitions, 2514 flow [2024-06-14 13:28:09,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:09,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:09,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:09,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:28:09,897 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:09,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:09,897 INFO L85 PathProgramCache]: Analyzing trace with hash -837686171, now seen corresponding path program 2 times [2024-06-14 13:28:09,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:09,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343376012] [2024-06-14 13:28:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:09,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:10,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:10,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343376012] [2024-06-14 13:28:10,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343376012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:10,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:10,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:28:10,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835431750] [2024-06-14 13:28:10,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:10,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:28:10,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:10,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:28:10,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:28:10,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:10,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 232 transitions, 2514 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:10,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:10,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:10,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:11,430 INFO L124 PetriNetUnfolderBase]: 2616/3907 cut-off events. [2024-06-14 13:28:11,430 INFO L125 PetriNetUnfolderBase]: For 207946/207946 co-relation queries the response was YES. [2024-06-14 13:28:11,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28907 conditions, 3907 events. 2616/3907 cut-off events. For 207946/207946 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18863 event pairs, 1123 based on Foata normal form. 3/3910 useless extension candidates. Maximal degree in co-relation 28816. Up to 3831 conditions per place. [2024-06-14 13:28:11,470 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 230 selfloop transitions, 24 changer transitions 0/257 dead transitions. [2024-06-14 13:28:11,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 257 transitions, 3186 flow [2024-06-14 13:28:11,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:28:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:28:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:28:11,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:28:11,471 INFO L175 Difference]: Start difference. First operand has 190 places, 232 transitions, 2514 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:28:11,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 257 transitions, 3186 flow [2024-06-14 13:28:11,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 257 transitions, 3119 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 13:28:11,724 INFO L231 Difference]: Finished difference. Result has 194 places, 240 transitions, 2599 flow [2024-06-14 13:28:11,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2599, PETRI_PLACES=194, PETRI_TRANSITIONS=240} [2024-06-14 13:28:11,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-14 13:28:11,725 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 240 transitions, 2599 flow [2024-06-14 13:28:11,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:11,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:11,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:11,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:28:11,726 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:11,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:11,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1081332163, now seen corresponding path program 3 times [2024-06-14 13:28:11,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:11,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910084294] [2024-06-14 13:28:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:11,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:12,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:12,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910084294] [2024-06-14 13:28:12,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910084294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:12,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:12,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:28:12,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646770449] [2024-06-14 13:28:12,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:12,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:28:12,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:12,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:28:12,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:28:12,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:12,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 240 transitions, 2599 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:12,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:12,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:12,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:13,215 INFO L124 PetriNetUnfolderBase]: 2607/3895 cut-off events. [2024-06-14 13:28:13,216 INFO L125 PetriNetUnfolderBase]: For 213274/213274 co-relation queries the response was YES. [2024-06-14 13:28:13,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28884 conditions, 3895 events. 2607/3895 cut-off events. For 213274/213274 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18817 event pairs, 1124 based on Foata normal form. 3/3898 useless extension candidates. Maximal degree in co-relation 28791. Up to 3819 conditions per place. [2024-06-14 13:28:13,253 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 22 changer transitions 0/258 dead transitions. [2024-06-14 13:28:13,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 258 transitions, 3188 flow [2024-06-14 13:28:13,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:28:13,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:28:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 13:28:13,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-14 13:28:13,255 INFO L175 Difference]: Start difference. First operand has 194 places, 240 transitions, 2599 flow. Second operand 6 states and 103 transitions. [2024-06-14 13:28:13,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 258 transitions, 3188 flow [2024-06-14 13:28:13,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 258 transitions, 3089 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 13:28:13,508 INFO L231 Difference]: Finished difference. Result has 196 places, 240 transitions, 2555 flow [2024-06-14 13:28:13,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2555, PETRI_PLACES=196, PETRI_TRANSITIONS=240} [2024-06-14 13:28:13,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-14 13:28:13,509 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 240 transitions, 2555 flow [2024-06-14 13:28:13,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:13,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:13,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:13,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:28:13,510 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:13,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:13,510 INFO L85 PathProgramCache]: Analyzing trace with hash -919592379, now seen corresponding path program 1 times [2024-06-14 13:28:13,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:13,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946002092] [2024-06-14 13:28:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:13,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:14,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946002092] [2024-06-14 13:28:14,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946002092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:14,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:14,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:28:14,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127413556] [2024-06-14 13:28:14,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:14,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:28:14,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:14,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:28:14,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:28:14,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:14,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 240 transitions, 2555 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:14,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:14,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:14,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:15,338 INFO L124 PetriNetUnfolderBase]: 2601/3887 cut-off events. [2024-06-14 13:28:15,338 INFO L125 PetriNetUnfolderBase]: For 218419/218419 co-relation queries the response was YES. [2024-06-14 13:28:15,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28828 conditions, 3887 events. 2601/3887 cut-off events. For 218419/218419 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18726 event pairs, 1112 based on Foata normal form. 2/3889 useless extension candidates. Maximal degree in co-relation 28734. Up to 3810 conditions per place. [2024-06-14 13:28:15,393 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 227 selfloop transitions, 25 changer transitions 0/255 dead transitions. [2024-06-14 13:28:15,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 3139 flow [2024-06-14 13:28:15,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:28:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:28:15,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-14 13:28:15,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-14 13:28:15,395 INFO L175 Difference]: Start difference. First operand has 196 places, 240 transitions, 2555 flow. Second operand 5 states and 88 transitions. [2024-06-14 13:28:15,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 3139 flow [2024-06-14 13:28:15,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 255 transitions, 3084 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:15,698 INFO L231 Difference]: Finished difference. Result has 196 places, 243 transitions, 2622 flow [2024-06-14 13:28:15,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2622, PETRI_PLACES=196, PETRI_TRANSITIONS=243} [2024-06-14 13:28:15,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-14 13:28:15,699 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 243 transitions, 2622 flow [2024-06-14 13:28:15,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:15,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:15,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:15,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:28:15,700 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)] === [2024-06-14 13:28:15,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:15,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1081578427, now seen corresponding path program 1 times [2024-06-14 13:28:15,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:15,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717685276] [2024-06-14 13:28:15,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:15,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:16,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:16,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717685276] [2024-06-14 13:28:16,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717685276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:16,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:16,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:16,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853628424] [2024-06-14 13:28:16,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:16,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:16,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:16,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:16,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:16,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:16,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 243 transitions, 2622 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:28:16,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:16,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:16,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:17,609 INFO L124 PetriNetUnfolderBase]: 2596/3880 cut-off events. [2024-06-14 13:28:17,609 INFO L125 PetriNetUnfolderBase]: For 224114/224114 co-relation queries the response was YES. [2024-06-14 13:28:17,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29193 conditions, 3880 events. 2596/3880 cut-off events. For 224114/224114 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18633 event pairs, 1113 based on Foata normal form. 2/3882 useless extension candidates. Maximal degree in co-relation 29098. Up to 3832 conditions per place. [2024-06-14 13:28:17,648 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 239 selfloop transitions, 12 changer transitions 0/254 dead transitions. [2024-06-14 13:28:17,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 254 transitions, 3176 flow [2024-06-14 13:28:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:28:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:28:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-14 13:28:17,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-14 13:28:17,649 INFO L175 Difference]: Start difference. First operand has 196 places, 243 transitions, 2622 flow. Second operand 5 states and 82 transitions. [2024-06-14 13:28:17,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 254 transitions, 3176 flow [2024-06-14 13:28:17,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 254 transitions, 3118 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:28:17,888 INFO L231 Difference]: Finished difference. Result has 198 places, 245 transitions, 2625 flow [2024-06-14 13:28:17,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2564, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2625, PETRI_PLACES=198, PETRI_TRANSITIONS=245} [2024-06-14 13:28:17,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-14 13:28:17,889 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 245 transitions, 2625 flow [2024-06-14 13:28:17,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:28:17,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:17,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:17,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:28:17,890 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:17,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:17,890 INFO L85 PathProgramCache]: Analyzing trace with hash -733714691, now seen corresponding path program 1 times [2024-06-14 13:28:17,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:17,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202303856] [2024-06-14 13:28:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:17,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:19,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:19,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202303856] [2024-06-14 13:28:19,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202303856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:19,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:19,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:28:19,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367849384] [2024-06-14 13:28:19,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:19,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:28:19,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:19,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:28:19,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:28:19,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:19,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 245 transitions, 2625 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:19,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:19,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:19,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:20,567 INFO L124 PetriNetUnfolderBase]: 2662/3976 cut-off events. [2024-06-14 13:28:20,567 INFO L125 PetriNetUnfolderBase]: For 234433/234437 co-relation queries the response was YES. [2024-06-14 13:28:20,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29979 conditions, 3976 events. 2662/3976 cut-off events. For 234433/234437 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 19184 event pairs, 527 based on Foata normal form. 8/3984 useless extension candidates. Maximal degree in co-relation 29883. Up to 3759 conditions per place. [2024-06-14 13:28:20,609 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 257 selfloop transitions, 37 changer transitions 0/297 dead transitions. [2024-06-14 13:28:20,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 297 transitions, 3472 flow [2024-06-14 13:28:20,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:20,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 13:28:20,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-14 13:28:20,611 INFO L175 Difference]: Start difference. First operand has 198 places, 245 transitions, 2625 flow. Second operand 10 states and 164 transitions. [2024-06-14 13:28:20,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 297 transitions, 3472 flow [2024-06-14 13:28:20,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 297 transitions, 3427 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:28:20,902 INFO L231 Difference]: Finished difference. Result has 208 places, 257 transitions, 2836 flow [2024-06-14 13:28:20,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2836, PETRI_PLACES=208, PETRI_TRANSITIONS=257} [2024-06-14 13:28:20,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-14 13:28:20,903 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 257 transitions, 2836 flow [2024-06-14 13:28:20,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:20,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:20,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:20,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:28:20,904 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)] === [2024-06-14 13:28:20,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:20,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1424229625, now seen corresponding path program 2 times [2024-06-14 13:28:20,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:20,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481016623] [2024-06-14 13:28:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:20,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:22,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:22,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481016623] [2024-06-14 13:28:22,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481016623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:22,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:22,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:28:22,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648949831] [2024-06-14 13:28:22,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:22,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:28:22,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:22,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:28:22,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:28:22,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:22,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 257 transitions, 2836 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:22,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:22,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:22,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:23,468 INFO L124 PetriNetUnfolderBase]: 2679/4003 cut-off events. [2024-06-14 13:28:23,468 INFO L125 PetriNetUnfolderBase]: For 246982/246984 co-relation queries the response was YES. [2024-06-14 13:28:23,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30903 conditions, 4003 events. 2679/4003 cut-off events. For 246982/246984 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19353 event pairs, 539 based on Foata normal form. 6/4009 useless extension candidates. Maximal degree in co-relation 30803. Up to 3787 conditions per place. [2024-06-14 13:28:23,503 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 256 selfloop transitions, 39 changer transitions 0/298 dead transitions. [2024-06-14 13:28:23,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 298 transitions, 3599 flow [2024-06-14 13:28:23,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:28:23,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-14 13:28:23,505 INFO L175 Difference]: Start difference. First operand has 208 places, 257 transitions, 2836 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:28:23,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 298 transitions, 3599 flow [2024-06-14 13:28:23,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 298 transitions, 3504 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-14 13:28:23,777 INFO L231 Difference]: Finished difference. Result has 215 places, 259 transitions, 2876 flow [2024-06-14 13:28:23,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2741, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2876, PETRI_PLACES=215, PETRI_TRANSITIONS=259} [2024-06-14 13:28:23,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-14 13:28:23,777 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 259 transitions, 2876 flow [2024-06-14 13:28:23,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:23,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:23,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:23,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:28:23,778 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)] === [2024-06-14 13:28:23,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:23,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1424225905, now seen corresponding path program 3 times [2024-06-14 13:28:23,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:23,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802737386] [2024-06-14 13:28:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:23,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:25,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:25,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802737386] [2024-06-14 13:28:25,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802737386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:25,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:25,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:28:25,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558412339] [2024-06-14 13:28:25,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:25,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:28:25,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:25,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:28:25,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:28:25,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:25,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 259 transitions, 2876 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:25,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:25,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:25,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:26,855 INFO L124 PetriNetUnfolderBase]: 2713/4055 cut-off events. [2024-06-14 13:28:26,855 INFO L125 PetriNetUnfolderBase]: For 258231/258233 co-relation queries the response was YES. [2024-06-14 13:28:26,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31602 conditions, 4055 events. 2713/4055 cut-off events. For 258231/258233 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19673 event pairs, 530 based on Foata normal form. 6/4061 useless extension candidates. Maximal degree in co-relation 31500. Up to 3782 conditions per place. [2024-06-14 13:28:26,902 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 252 selfloop transitions, 47 changer transitions 0/302 dead transitions. [2024-06-14 13:28:26,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 302 transitions, 3679 flow [2024-06-14 13:28:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:26,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-14 13:28:26,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-14 13:28:26,903 INFO L175 Difference]: Start difference. First operand has 215 places, 259 transitions, 2876 flow. Second operand 10 states and 169 transitions. [2024-06-14 13:28:26,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 302 transitions, 3679 flow [2024-06-14 13:28:27,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 302 transitions, 3562 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 13:28:27,304 INFO L231 Difference]: Finished difference. Result has 218 places, 263 transitions, 2950 flow [2024-06-14 13:28:27,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2950, PETRI_PLACES=218, PETRI_TRANSITIONS=263} [2024-06-14 13:28:27,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-14 13:28:27,305 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 263 transitions, 2950 flow [2024-06-14 13:28:27,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:27,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:27,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:27,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:28:27,306 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)] === [2024-06-14 13:28:27,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:27,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1422351955, now seen corresponding path program 4 times [2024-06-14 13:28:27,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:27,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340321772] [2024-06-14 13:28:27,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:27,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:28,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:28,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340321772] [2024-06-14 13:28:28,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340321772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:28,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:28,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:28:28,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455988981] [2024-06-14 13:28:28,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:28,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:28:28,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:28,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:28:28,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:28:28,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:28,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 263 transitions, 2950 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:28,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:28,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:28,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:29,920 INFO L124 PetriNetUnfolderBase]: 2798/4196 cut-off events. [2024-06-14 13:28:29,920 INFO L125 PetriNetUnfolderBase]: For 269693/269695 co-relation queries the response was YES. [2024-06-14 13:28:29,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32651 conditions, 4196 events. 2798/4196 cut-off events. For 269693/269695 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 20699 event pairs, 535 based on Foata normal form. 6/4202 useless extension candidates. Maximal degree in co-relation 32547. Up to 3942 conditions per place. [2024-06-14 13:28:29,967 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 269 selfloop transitions, 43 changer transitions 0/315 dead transitions. [2024-06-14 13:28:29,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 315 transitions, 3863 flow [2024-06-14 13:28:29,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-14 13:28:29,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-14 13:28:29,972 INFO L175 Difference]: Start difference. First operand has 218 places, 263 transitions, 2950 flow. Second operand 10 states and 166 transitions. [2024-06-14 13:28:29,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 315 transitions, 3863 flow [2024-06-14 13:28:30,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 315 transitions, 3758 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:30,331 INFO L231 Difference]: Finished difference. Result has 225 places, 275 transitions, 3131 flow [2024-06-14 13:28:30,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2845, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3131, PETRI_PLACES=225, PETRI_TRANSITIONS=275} [2024-06-14 13:28:30,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-14 13:28:30,332 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 275 transitions, 3131 flow [2024-06-14 13:28:30,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:30,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:30,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:30,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:28:30,338 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)] === [2024-06-14 13:28:30,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:30,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1511071537, now seen corresponding path program 1 times [2024-06-14 13:28:30,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:30,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606330415] [2024-06-14 13:28:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:30,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:31,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:31,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606330415] [2024-06-14 13:28:31,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606330415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:31,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:31,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:28:31,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738322083] [2024-06-14 13:28:31,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:31,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:28:31,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:31,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:28:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:28:31,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:31,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 275 transitions, 3131 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:31,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:31,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:31,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:32,844 INFO L124 PetriNetUnfolderBase]: 2895/4355 cut-off events. [2024-06-14 13:28:32,844 INFO L125 PetriNetUnfolderBase]: For 302081/302083 co-relation queries the response was YES. [2024-06-14 13:28:32,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33905 conditions, 4355 events. 2895/4355 cut-off events. For 302081/302083 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21780 event pairs, 542 based on Foata normal form. 22/4377 useless extension candidates. Maximal degree in co-relation 33797. Up to 4008 conditions per place. [2024-06-14 13:28:32,897 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 283 selfloop transitions, 41 changer transitions 0/327 dead transitions. [2024-06-14 13:28:32,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 327 transitions, 3993 flow [2024-06-14 13:28:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:28:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:28:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-14 13:28:32,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-14 13:28:32,899 INFO L175 Difference]: Start difference. First operand has 225 places, 275 transitions, 3131 flow. Second operand 11 states and 185 transitions. [2024-06-14 13:28:32,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 327 transitions, 3993 flow [2024-06-14 13:28:33,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 327 transitions, 3864 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:33,368 INFO L231 Difference]: Finished difference. Result has 232 places, 279 transitions, 3146 flow [2024-06-14 13:28:33,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3002, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3146, PETRI_PLACES=232, PETRI_TRANSITIONS=279} [2024-06-14 13:28:33,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-14 13:28:33,370 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 279 transitions, 3146 flow [2024-06-14 13:28:33,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:33,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:33,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:33,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:28:33,371 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)] === [2024-06-14 13:28:33,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:33,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1067960957, now seen corresponding path program 5 times [2024-06-14 13:28:33,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:33,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402103645] [2024-06-14 13:28:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:33,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:35,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:35,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402103645] [2024-06-14 13:28:35,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402103645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:35,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:35,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:28:35,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293174092] [2024-06-14 13:28:35,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:35,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:28:35,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:35,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:28:35,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:28:35,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:35,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 279 transitions, 3146 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:35,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:35,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:35,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:36,392 INFO L124 PetriNetUnfolderBase]: 3088/4638 cut-off events. [2024-06-14 13:28:36,392 INFO L125 PetriNetUnfolderBase]: For 294716/294716 co-relation queries the response was YES. [2024-06-14 13:28:36,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36017 conditions, 4638 events. 3088/4638 cut-off events. For 294716/294716 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23399 event pairs, 559 based on Foata normal form. 4/4642 useless extension candidates. Maximal degree in co-relation 35906. Up to 4242 conditions per place. [2024-06-14 13:28:36,441 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 284 selfloop transitions, 61 changer transitions 0/348 dead transitions. [2024-06-14 13:28:36,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 348 transitions, 4387 flow [2024-06-14 13:28:36,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 13:28:36,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:28:36,443 INFO L175 Difference]: Start difference. First operand has 232 places, 279 transitions, 3146 flow. Second operand 10 states and 170 transitions. [2024-06-14 13:28:36,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 348 transitions, 4387 flow [2024-06-14 13:28:36,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 348 transitions, 4294 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:28:36,971 INFO L231 Difference]: Finished difference. Result has 237 places, 305 transitions, 3633 flow [2024-06-14 13:28:36,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3633, PETRI_PLACES=237, PETRI_TRANSITIONS=305} [2024-06-14 13:28:36,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-14 13:28:36,972 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 305 transitions, 3633 flow [2024-06-14 13:28:36,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:36,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:36,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:36,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:28:36,973 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)] === [2024-06-14 13:28:36,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:36,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1067955005, now seen corresponding path program 2 times [2024-06-14 13:28:36,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:36,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714248483] [2024-06-14 13:28:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:36,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:38,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:38,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714248483] [2024-06-14 13:28:38,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714248483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:38,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:38,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:28:38,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769109204] [2024-06-14 13:28:38,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:38,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:28:38,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:38,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:28:38,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:28:38,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:38,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 305 transitions, 3633 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:38,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:38,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:38,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:40,100 INFO L124 PetriNetUnfolderBase]: 3185/4795 cut-off events. [2024-06-14 13:28:40,100 INFO L125 PetriNetUnfolderBase]: For 329859/329859 co-relation queries the response was YES. [2024-06-14 13:28:40,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37444 conditions, 4795 events. 3185/4795 cut-off events. For 329859/329859 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24487 event pairs, 574 based on Foata normal form. 20/4815 useless extension candidates. Maximal degree in co-relation 37329. Up to 4274 conditions per place. [2024-06-14 13:28:40,155 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 295 selfloop transitions, 63 changer transitions 0/361 dead transitions. [2024-06-14 13:28:40,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 361 transitions, 4631 flow [2024-06-14 13:28:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:28:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:28:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-14 13:28:40,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-14 13:28:40,157 INFO L175 Difference]: Start difference. First operand has 237 places, 305 transitions, 3633 flow. Second operand 11 states and 188 transitions. [2024-06-14 13:28:40,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 361 transitions, 4631 flow [2024-06-14 13:28:40,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 361 transitions, 4491 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:40,746 INFO L231 Difference]: Finished difference. Result has 244 places, 309 transitions, 3685 flow [2024-06-14 13:28:40,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3493, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3685, PETRI_PLACES=244, PETRI_TRANSITIONS=309} [2024-06-14 13:28:40,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-14 13:28:40,748 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 309 transitions, 3685 flow [2024-06-14 13:28:40,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:40,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:40,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:40,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:28:40,748 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:40,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:40,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1068108827, now seen corresponding path program 6 times [2024-06-14 13:28:40,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:40,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129356030] [2024-06-14 13:28:40,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:40,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:42,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:42,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129356030] [2024-06-14 13:28:42,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129356030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:42,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:42,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:28:42,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628418994] [2024-06-14 13:28:42,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:42,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:28:42,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:42,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:28:42,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:28:42,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:42,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 309 transitions, 3685 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:42,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:42,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:42,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:43,714 INFO L124 PetriNetUnfolderBase]: 3244/4888 cut-off events. [2024-06-14 13:28:43,714 INFO L125 PetriNetUnfolderBase]: For 330726/330726 co-relation queries the response was YES. [2024-06-14 13:28:43,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38656 conditions, 4888 events. 3244/4888 cut-off events. For 330726/330726 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 25133 event pairs, 579 based on Foata normal form. 4/4892 useless extension candidates. Maximal degree in co-relation 38539. Up to 4427 conditions per place. [2024-06-14 13:28:43,772 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 291 selfloop transitions, 65 changer transitions 0/359 dead transitions. [2024-06-14 13:28:43,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 359 transitions, 4926 flow [2024-06-14 13:28:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:43,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-14 13:28:43,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-14 13:28:43,774 INFO L175 Difference]: Start difference. First operand has 244 places, 309 transitions, 3685 flow. Second operand 10 states and 172 transitions. [2024-06-14 13:28:43,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 359 transitions, 4926 flow [2024-06-14 13:28:44,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 359 transitions, 4785 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 13:28:44,277 INFO L231 Difference]: Finished difference. Result has 247 places, 314 transitions, 3831 flow [2024-06-14 13:28:44,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3831, PETRI_PLACES=247, PETRI_TRANSITIONS=314} [2024-06-14 13:28:44,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-14 13:28:44,278 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 314 transitions, 3831 flow [2024-06-14 13:28:44,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:44,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:44,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:44,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:28:44,278 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:44,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:44,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1062598577, now seen corresponding path program 7 times [2024-06-14 13:28:44,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:44,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488822761] [2024-06-14 13:28:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:44,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:45,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:45,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488822761] [2024-06-14 13:28:45,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488822761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:45,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:45,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:28:45,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289629170] [2024-06-14 13:28:45,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:45,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:28:45,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:45,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:28:45,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:28:45,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:45,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 314 transitions, 3831 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:45,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:45,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:45,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:46,838 INFO L124 PetriNetUnfolderBase]: 3236/4876 cut-off events. [2024-06-14 13:28:46,838 INFO L125 PetriNetUnfolderBase]: For 336989/336989 co-relation queries the response was YES. [2024-06-14 13:28:46,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38607 conditions, 4876 events. 3236/4876 cut-off events. For 336989/336989 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 25067 event pairs, 583 based on Foata normal form. 4/4880 useless extension candidates. Maximal degree in co-relation 38488. Up to 4480 conditions per place. [2024-06-14 13:28:46,893 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 293 selfloop transitions, 63 changer transitions 0/359 dead transitions. [2024-06-14 13:28:46,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 359 transitions, 4775 flow [2024-06-14 13:28:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:46,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 13:28:46,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:28:46,897 INFO L175 Difference]: Start difference. First operand has 247 places, 314 transitions, 3831 flow. Second operand 10 states and 170 transitions. [2024-06-14 13:28:46,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 359 transitions, 4775 flow [2024-06-14 13:28:47,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 359 transitions, 4538 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-14 13:28:47,396 INFO L231 Difference]: Finished difference. Result has 251 places, 318 transitions, 3848 flow [2024-06-14 13:28:47,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3848, PETRI_PLACES=251, PETRI_TRANSITIONS=318} [2024-06-14 13:28:47,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-14 13:28:47,396 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 318 transitions, 3848 flow [2024-06-14 13:28:47,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:47,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:47,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:47,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:28:47,397 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:47,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:47,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1062383375, now seen corresponding path program 3 times [2024-06-14 13:28:47,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:47,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542744853] [2024-06-14 13:28:47,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:47,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:48,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:48,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542744853] [2024-06-14 13:28:48,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542744853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:48,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:48,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:48,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854582048] [2024-06-14 13:28:48,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:48,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:48,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:48,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:48,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:48,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:48,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 318 transitions, 3848 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-14 13:28:48,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:48,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:48,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:49,983 INFO L124 PetriNetUnfolderBase]: 3405/5159 cut-off events. [2024-06-14 13:28:49,983 INFO L125 PetriNetUnfolderBase]: For 392622/392622 co-relation queries the response was YES. [2024-06-14 13:28:50,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41367 conditions, 5159 events. 3405/5159 cut-off events. For 392622/392622 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 26999 event pairs, 448 based on Foata normal form. 16/5175 useless extension candidates. Maximal degree in co-relation 41245. Up to 3475 conditions per place. [2024-06-14 13:28:50,033 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 140 changer transitions 0/365 dead transitions. [2024-06-14 13:28:50,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 365 transitions, 5020 flow [2024-06-14 13:28:50,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:28:50,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 13:28:50,035 INFO L175 Difference]: Start difference. First operand has 251 places, 318 transitions, 3848 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:28:50,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 365 transitions, 5020 flow [2024-06-14 13:28:50,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 365 transitions, 4936 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:50,429 INFO L231 Difference]: Finished difference. Result has 255 places, 320 transitions, 4124 flow [2024-06-14 13:28:50,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3764, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4124, PETRI_PLACES=255, PETRI_TRANSITIONS=320} [2024-06-14 13:28:50,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-14 13:28:50,430 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 320 transitions, 4124 flow [2024-06-14 13:28:50,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-14 13:28:50,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:50,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:50,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:28:50,431 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:50,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:50,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1542633577, now seen corresponding path program 4 times [2024-06-14 13:28:50,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:50,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401482448] [2024-06-14 13:28:50,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:50,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:51,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:51,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401482448] [2024-06-14 13:28:51,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401482448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:51,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:51,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:51,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109042849] [2024-06-14 13:28:51,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:51,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:51,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:51,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:51,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:51,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 320 transitions, 4124 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-14 13:28:51,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:51,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:51,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:53,157 INFO L124 PetriNetUnfolderBase]: 3480/5284 cut-off events. [2024-06-14 13:28:53,157 INFO L125 PetriNetUnfolderBase]: For 416532/416532 co-relation queries the response was YES. [2024-06-14 13:28:53,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43059 conditions, 5284 events. 3480/5284 cut-off events. For 416532/416532 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27926 event pairs, 629 based on Foata normal form. 20/5304 useless extension candidates. Maximal degree in co-relation 42936. Up to 4142 conditions per place. [2024-06-14 13:28:53,226 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 135 changer transitions 0/360 dead transitions. [2024-06-14 13:28:53,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 360 transitions, 5018 flow [2024-06-14 13:28:53,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:53,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:28:53,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 13:28:53,228 INFO L175 Difference]: Start difference. First operand has 255 places, 320 transitions, 4124 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:28:53,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 360 transitions, 5018 flow [2024-06-14 13:28:53,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 360 transitions, 4797 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:53,738 INFO L231 Difference]: Finished difference. Result has 259 places, 321 transitions, 4220 flow [2024-06-14 13:28:53,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4220, PETRI_PLACES=259, PETRI_TRANSITIONS=321} [2024-06-14 13:28:53,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-14 13:28:53,739 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 321 transitions, 4220 flow [2024-06-14 13:28:53,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-14 13:28:53,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:53,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:53,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:28:53,739 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:53,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:53,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1542431767, now seen corresponding path program 5 times [2024-06-14 13:28:53,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:53,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304746773] [2024-06-14 13:28:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:53,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:55,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:55,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304746773] [2024-06-14 13:28:55,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304746773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:55,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:55,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:28:55,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860417932] [2024-06-14 13:28:55,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:55,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:28:55,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:55,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:28:55,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:28:55,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:55,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 321 transitions, 4220 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:55,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:55,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:55,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:56,883 INFO L124 PetriNetUnfolderBase]: 3577/5437 cut-off events. [2024-06-14 13:28:56,883 INFO L125 PetriNetUnfolderBase]: For 426331/426331 co-relation queries the response was YES. [2024-06-14 13:28:56,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44138 conditions, 5437 events. 3577/5437 cut-off events. For 426331/426331 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29081 event pairs, 666 based on Foata normal form. 20/5457 useless extension candidates. Maximal degree in co-relation 44013. Up to 4916 conditions per place. [2024-06-14 13:28:56,950 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 307 selfloop transitions, 65 changer transitions 0/375 dead transitions. [2024-06-14 13:28:56,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 375 transitions, 5199 flow [2024-06-14 13:28:56,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:28:56,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:28:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-14 13:28:56,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-14 13:28:56,951 INFO L175 Difference]: Start difference. First operand has 259 places, 321 transitions, 4220 flow. Second operand 11 states and 188 transitions. [2024-06-14 13:28:56,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 375 transitions, 5199 flow [2024-06-14 13:28:57,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 375 transitions, 4910 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:28:57,519 INFO L231 Difference]: Finished difference. Result has 264 places, 325 transitions, 4134 flow [2024-06-14 13:28:57,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3937, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4134, PETRI_PLACES=264, PETRI_TRANSITIONS=325} [2024-06-14 13:28:57,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-14 13:28:57,520 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 325 transitions, 4134 flow [2024-06-14 13:28:57,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:57,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:57,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:57,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:28:57,521 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:57,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash -720921137, now seen corresponding path program 8 times [2024-06-14 13:28:57,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:57,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394994816] [2024-06-14 13:28:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:57,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:58,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:58,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394994816] [2024-06-14 13:28:58,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394994816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:58,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:58,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:28:58,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380867983] [2024-06-14 13:28:58,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:58,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:28:58,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:58,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:28:58,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:28:58,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:28:58,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 325 transitions, 4134 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:28:58,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:58,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:28:58,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:00,385 INFO L124 PetriNetUnfolderBase]: 3834/5852 cut-off events. [2024-06-14 13:29:00,386 INFO L125 PetriNetUnfolderBase]: For 467839/467841 co-relation queries the response was YES. [2024-06-14 13:29:00,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46318 conditions, 5852 events. 3834/5852 cut-off events. For 467839/467841 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 31987 event pairs, 788 based on Foata normal form. 38/5890 useless extension candidates. Maximal degree in co-relation 46191. Up to 5297 conditions per place. [2024-06-14 13:29:00,457 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 332 selfloop transitions, 51 changer transitions 0/386 dead transitions. [2024-06-14 13:29:00,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 386 transitions, 5368 flow [2024-06-14 13:29:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:29:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:29:00,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 13:29:00,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:29:00,458 INFO L175 Difference]: Start difference. First operand has 264 places, 325 transitions, 4134 flow. Second operand 10 states and 170 transitions. [2024-06-14 13:29:00,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 386 transitions, 5368 flow [2024-06-14 13:29:01,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 386 transitions, 5215 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:29:01,020 INFO L231 Difference]: Finished difference. Result has 268 places, 340 transitions, 4403 flow [2024-06-14 13:29:01,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3993, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4403, PETRI_PLACES=268, PETRI_TRANSITIONS=340} [2024-06-14 13:29:01,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-14 13:29:01,020 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 340 transitions, 4403 flow [2024-06-14 13:29:01,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:29:01,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:01,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:01,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:29:01,021 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:01,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:01,021 INFO L85 PathProgramCache]: Analyzing trace with hash -48564653, now seen corresponding path program 9 times [2024-06-14 13:29:01,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:01,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679375665] [2024-06-14 13:29:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:01,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:02,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:02,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679375665] [2024-06-14 13:29:02,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679375665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:02,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:02,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:29:02,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083172368] [2024-06-14 13:29:02,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:02,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:29:02,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:02,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:29:02,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:29:02,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:02,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 340 transitions, 4403 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:29:02,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:02,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:02,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:03,635 INFO L124 PetriNetUnfolderBase]: 3931/6009 cut-off events. [2024-06-14 13:29:03,636 INFO L125 PetriNetUnfolderBase]: For 456830/456832 co-relation queries the response was YES. [2024-06-14 13:29:03,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47617 conditions, 6009 events. 3931/6009 cut-off events. For 456830/456832 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 33125 event pairs, 784 based on Foata normal form. 18/6027 useless extension candidates. Maximal degree in co-relation 47487. Up to 5317 conditions per place. [2024-06-14 13:29:03,717 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 338 selfloop transitions, 55 changer transitions 0/396 dead transitions. [2024-06-14 13:29:03,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 396 transitions, 5556 flow [2024-06-14 13:29:03,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:29:03,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:29:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 13:29:03,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-14 13:29:03,719 INFO L175 Difference]: Start difference. First operand has 268 places, 340 transitions, 4403 flow. Second operand 10 states and 173 transitions. [2024-06-14 13:29:03,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 396 transitions, 5556 flow [2024-06-14 13:29:04,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 396 transitions, 5454 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:04,271 INFO L231 Difference]: Finished difference. Result has 273 places, 346 transitions, 4551 flow [2024-06-14 13:29:04,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4551, PETRI_PLACES=273, PETRI_TRANSITIONS=346} [2024-06-14 13:29:04,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-14 13:29:04,271 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 346 transitions, 4551 flow [2024-06-14 13:29:04,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:29:04,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:04,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:04,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:29:04,272 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:04,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:04,273 INFO L85 PathProgramCache]: Analyzing trace with hash 936567759, now seen corresponding path program 10 times [2024-06-14 13:29:04,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:04,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531558897] [2024-06-14 13:29:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:04,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:05,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:05,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531558897] [2024-06-14 13:29:05,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531558897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:05,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:05,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:05,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119881551] [2024-06-14 13:29:05,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:05,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:05,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:05,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:05,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:05,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:05,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 346 transitions, 4551 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-14 13:29:05,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:05,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:05,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:07,205 INFO L124 PetriNetUnfolderBase]: 4090/6272 cut-off events. [2024-06-14 13:29:07,205 INFO L125 PetriNetUnfolderBase]: For 475666/475668 co-relation queries the response was YES. [2024-06-14 13:29:07,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49416 conditions, 6272 events. 4090/6272 cut-off events. For 475666/475668 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 35137 event pairs, 803 based on Foata normal form. 18/6290 useless extension candidates. Maximal degree in co-relation 49284. Up to 5819 conditions per place. [2024-06-14 13:29:07,274 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 53 changer transitions 0/408 dead transitions. [2024-06-14 13:29:07,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 408 transitions, 5831 flow [2024-06-14 13:29:07,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:29:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:29:07,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 13:29:07,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-14 13:29:07,276 INFO L175 Difference]: Start difference. First operand has 273 places, 346 transitions, 4551 flow. Second operand 10 states and 164 transitions. [2024-06-14 13:29:07,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 408 transitions, 5831 flow [2024-06-14 13:29:07,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 408 transitions, 5738 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:07,835 INFO L231 Difference]: Finished difference. Result has 279 places, 364 transitions, 4905 flow [2024-06-14 13:29:07,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4905, PETRI_PLACES=279, PETRI_TRANSITIONS=364} [2024-06-14 13:29:07,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-14 13:29:07,836 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 364 transitions, 4905 flow [2024-06-14 13:29:07,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-14 13:29:07,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:07,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:07,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:29:07,836 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:07,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:07,837 INFO L85 PathProgramCache]: Analyzing trace with hash 558364913, now seen corresponding path program 11 times [2024-06-14 13:29:07,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:07,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426127234] [2024-06-14 13:29:07,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:07,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:09,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:09,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426127234] [2024-06-14 13:29:09,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426127234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:09,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:09,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:29:09,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769702285] [2024-06-14 13:29:09,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:09,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:29:09,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:09,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:29:09,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:29:09,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:09,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 364 transitions, 4905 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:09,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:09,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:09,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:11,142 INFO L124 PetriNetUnfolderBase]: 4107/6297 cut-off events. [2024-06-14 13:29:11,143 INFO L125 PetriNetUnfolderBase]: For 472578/472580 co-relation queries the response was YES. [2024-06-14 13:29:11,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50453 conditions, 6297 events. 4107/6297 cut-off events. For 472578/472580 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35269 event pairs, 817 based on Foata normal form. 6/6303 useless extension candidates. Maximal degree in co-relation 50317. Up to 5763 conditions per place. [2024-06-14 13:29:11,248 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 333 selfloop transitions, 67 changer transitions 0/403 dead transitions. [2024-06-14 13:29:11,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 403 transitions, 6004 flow [2024-06-14 13:29:11,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:29:11,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:29:11,250 INFO L175 Difference]: Start difference. First operand has 279 places, 364 transitions, 4905 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:29:11,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 403 transitions, 6004 flow [2024-06-14 13:29:12,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 403 transitions, 5792 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:12,152 INFO L231 Difference]: Finished difference. Result has 283 places, 369 transitions, 5055 flow [2024-06-14 13:29:12,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5055, PETRI_PLACES=283, PETRI_TRANSITIONS=369} [2024-06-14 13:29:12,153 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-14 13:29:12,153 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 369 transitions, 5055 flow [2024-06-14 13:29:12,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:12,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:12,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:12,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:29:12,153 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:12,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:12,154 INFO L85 PathProgramCache]: Analyzing trace with hash 560242583, now seen corresponding path program 12 times [2024-06-14 13:29:12,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:12,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134414774] [2024-06-14 13:29:12,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:12,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:13,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:13,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134414774] [2024-06-14 13:29:13,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134414774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:13,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:13,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:29:13,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161997506] [2024-06-14 13:29:13,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:13,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:29:13,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:13,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:29:13,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:29:13,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:13,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 369 transitions, 5055 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:13,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:13,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:13,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:15,251 INFO L124 PetriNetUnfolderBase]: 4124/6336 cut-off events. [2024-06-14 13:29:15,251 INFO L125 PetriNetUnfolderBase]: For 488349/488351 co-relation queries the response was YES. [2024-06-14 13:29:15,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51331 conditions, 6336 events. 4124/6336 cut-off events. For 488349/488351 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35763 event pairs, 990 based on Foata normal form. 6/6342 useless extension candidates. Maximal degree in co-relation 51193. Up to 5938 conditions per place. [2024-06-14 13:29:15,333 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 57 changer transitions 0/406 dead transitions. [2024-06-14 13:29:15,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 406 transitions, 6092 flow [2024-06-14 13:29:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:15,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:15,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:29:15,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-14 13:29:15,334 INFO L175 Difference]: Start difference. First operand has 283 places, 369 transitions, 5055 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:29:15,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 406 transitions, 6092 flow [2024-06-14 13:29:16,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 406 transitions, 5905 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-14 13:29:16,293 INFO L231 Difference]: Finished difference. Result has 287 places, 372 transitions, 5111 flow [2024-06-14 13:29:16,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4872, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5111, PETRI_PLACES=287, PETRI_TRANSITIONS=372} [2024-06-14 13:29:16,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-14 13:29:16,294 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 372 transitions, 5111 flow [2024-06-14 13:29:16,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:16,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:16,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:16,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:29:16,294 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:16,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash 643355753, now seen corresponding path program 13 times [2024-06-14 13:29:16,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:16,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329890110] [2024-06-14 13:29:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:16,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:17,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:17,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329890110] [2024-06-14 13:29:17,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329890110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:17,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:17,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:29:17,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127436709] [2024-06-14 13:29:17,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:17,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:29:17,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:17,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:29:17,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:29:17,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:17,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 372 transitions, 5111 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:17,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:17,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:17,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:19,495 INFO L124 PetriNetUnfolderBase]: 4141/6361 cut-off events. [2024-06-14 13:29:19,495 INFO L125 PetriNetUnfolderBase]: For 470758/470760 co-relation queries the response was YES. [2024-06-14 13:29:19,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51179 conditions, 6361 events. 4141/6361 cut-off events. For 470758/470760 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35970 event pairs, 944 based on Foata normal form. 6/6367 useless extension candidates. Maximal degree in co-relation 51039. Up to 5819 conditions per place. [2024-06-14 13:29:19,567 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 67 changer transitions 0/411 dead transitions. [2024-06-14 13:29:19,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 411 transitions, 6208 flow [2024-06-14 13:29:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:29:19,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-14 13:29:19,568 INFO L175 Difference]: Start difference. First operand has 287 places, 372 transitions, 5111 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:29:19,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 411 transitions, 6208 flow [2024-06-14 13:29:20,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 411 transitions, 6016 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 13:29:20,246 INFO L231 Difference]: Finished difference. Result has 290 places, 377 transitions, 5256 flow [2024-06-14 13:29:20,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4919, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5256, PETRI_PLACES=290, PETRI_TRANSITIONS=377} [2024-06-14 13:29:20,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-14 13:29:20,247 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 377 transitions, 5256 flow [2024-06-14 13:29:20,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:20,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:20,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:20,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:29:20,248 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)] === [2024-06-14 13:29:20,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:20,248 INFO L85 PathProgramCache]: Analyzing trace with hash 872609243, now seen corresponding path program 6 times [2024-06-14 13:29:20,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:20,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042382598] [2024-06-14 13:29:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:20,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:21,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:21,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042382598] [2024-06-14 13:29:21,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042382598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:21,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:21,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:29:21,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366578949] [2024-06-14 13:29:21,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:21,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:29:21,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:21,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:29:21,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:29:21,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:21,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 377 transitions, 5256 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:21,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:21,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:21,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:23,392 INFO L124 PetriNetUnfolderBase]: 4216/6486 cut-off events. [2024-06-14 13:29:23,392 INFO L125 PetriNetUnfolderBase]: For 514262/514264 co-relation queries the response was YES. [2024-06-14 13:29:23,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52116 conditions, 6486 events. 4216/6486 cut-off events. For 514262/514264 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 36878 event pairs, 933 based on Foata normal form. 22/6508 useless extension candidates. Maximal degree in co-relation 51974. Up to 5644 conditions per place. [2024-06-14 13:29:23,479 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 351 selfloop transitions, 67 changer transitions 0/421 dead transitions. [2024-06-14 13:29:23,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 421 transitions, 6294 flow [2024-06-14 13:29:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:29:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:29:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:29:23,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-14 13:29:23,481 INFO L175 Difference]: Start difference. First operand has 290 places, 377 transitions, 5256 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:29:23,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 421 transitions, 6294 flow [2024-06-14 13:29:24,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 421 transitions, 6086 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-14 13:29:24,560 INFO L231 Difference]: Finished difference. Result has 295 places, 378 transitions, 5234 flow [2024-06-14 13:29:24,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5048, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5234, PETRI_PLACES=295, PETRI_TRANSITIONS=378} [2024-06-14 13:29:24,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-14 13:29:24,561 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 378 transitions, 5234 flow [2024-06-14 13:29:24,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:24,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:24,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:24,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:29:24,561 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:24,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:24,562 INFO L85 PathProgramCache]: Analyzing trace with hash 133084089, now seen corresponding path program 14 times [2024-06-14 13:29:24,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:24,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904413669] [2024-06-14 13:29:24,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:24,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:25,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:25,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904413669] [2024-06-14 13:29:25,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904413669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:25,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:25,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:29:25,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447002500] [2024-06-14 13:29:25,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:25,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:29:25,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:25,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:29:25,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:29:26,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:26,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 378 transitions, 5234 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:26,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:26,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:26,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:27,644 INFO L124 PetriNetUnfolderBase]: 4233/6501 cut-off events. [2024-06-14 13:29:27,645 INFO L125 PetriNetUnfolderBase]: For 481783/481783 co-relation queries the response was YES. [2024-06-14 13:29:27,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52220 conditions, 6501 events. 4233/6501 cut-off events. For 481783/481783 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 36881 event pairs, 832 based on Foata normal form. 4/6505 useless extension candidates. Maximal degree in co-relation 52076. Up to 5889 conditions per place. [2024-06-14 13:29:27,728 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 87 changer transitions 0/414 dead transitions. [2024-06-14 13:29:27,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 414 transitions, 6262 flow [2024-06-14 13:29:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:29:27,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 13:29:27,730 INFO L175 Difference]: Start difference. First operand has 295 places, 378 transitions, 5234 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:29:27,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 414 transitions, 6262 flow [2024-06-14 13:29:28,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 414 transitions, 6112 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 13:29:28,773 INFO L231 Difference]: Finished difference. Result has 296 places, 380 transitions, 5356 flow [2024-06-14 13:29:28,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5084, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5356, PETRI_PLACES=296, PETRI_TRANSITIONS=380} [2024-06-14 13:29:28,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-14 13:29:28,773 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 380 transitions, 5356 flow [2024-06-14 13:29:28,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:28,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:28,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:28,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:29:28,774 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:28,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:28,774 INFO L85 PathProgramCache]: Analyzing trace with hash 133080369, now seen corresponding path program 15 times [2024-06-14 13:29:28,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:28,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642887478] [2024-06-14 13:29:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:28,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:30,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:30,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642887478] [2024-06-14 13:29:30,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642887478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:30,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:30,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:29:30,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940499776] [2024-06-14 13:29:30,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:30,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:29:30,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:30,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:29:30,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:29:30,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:30,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 380 transitions, 5356 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:30,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:30,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:30,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:32,175 INFO L124 PetriNetUnfolderBase]: 4275/6567 cut-off events. [2024-06-14 13:29:32,176 INFO L125 PetriNetUnfolderBase]: For 509272/509272 co-relation queries the response was YES. [2024-06-14 13:29:32,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53528 conditions, 6567 events. 4275/6567 cut-off events. For 509272/509272 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 37357 event pairs, 832 based on Foata normal form. 4/6571 useless extension candidates. Maximal degree in co-relation 53383. Up to 5831 conditions per place. [2024-06-14 13:29:32,281 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 322 selfloop transitions, 96 changer transitions 0/421 dead transitions. [2024-06-14 13:29:32,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 421 transitions, 6738 flow [2024-06-14 13:29:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:32,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:29:32,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-14 13:29:32,283 INFO L175 Difference]: Start difference. First operand has 296 places, 380 transitions, 5356 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:29:32,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 421 transitions, 6738 flow [2024-06-14 13:29:33,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 421 transitions, 6498 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 13:29:33,319 INFO L231 Difference]: Finished difference. Result has 299 places, 385 transitions, 5523 flow [2024-06-14 13:29:33,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5116, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5523, PETRI_PLACES=299, PETRI_TRANSITIONS=385} [2024-06-14 13:29:33,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-14 13:29:33,320 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 385 transitions, 5523 flow [2024-06-14 13:29:33,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:33,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:33,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:33,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:29:33,320 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:33,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:33,321 INFO L85 PathProgramCache]: Analyzing trace with hash 133234191, now seen corresponding path program 7 times [2024-06-14 13:29:33,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:33,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760713711] [2024-06-14 13:29:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:33,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:34,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:34,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760713711] [2024-06-14 13:29:34,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760713711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:34,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:34,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:29:34,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366278127] [2024-06-14 13:29:34,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:34,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:29:34,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:34,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:29:34,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:29:34,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:34,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 385 transitions, 5523 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:34,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:34,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:34,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:36,621 INFO L124 PetriNetUnfolderBase]: 4350/6692 cut-off events. [2024-06-14 13:29:36,621 INFO L125 PetriNetUnfolderBase]: For 555816/555816 co-relation queries the response was YES. [2024-06-14 13:29:36,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54633 conditions, 6692 events. 4350/6692 cut-off events. For 555816/555816 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 38225 event pairs, 844 based on Foata normal form. 20/6712 useless extension candidates. Maximal degree in co-relation 54486. Up to 5784 conditions per place. [2024-06-14 13:29:36,707 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 334 selfloop transitions, 97 changer transitions 0/434 dead transitions. [2024-06-14 13:29:36,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 434 transitions, 6607 flow [2024-06-14 13:29:36,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:29:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:29:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-14 13:29:36,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-14 13:29:36,708 INFO L175 Difference]: Start difference. First operand has 299 places, 385 transitions, 5523 flow. Second operand 11 states and 185 transitions. [2024-06-14 13:29:36,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 434 transitions, 6607 flow [2024-06-14 13:29:37,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 434 transitions, 6384 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:37,707 INFO L231 Difference]: Finished difference. Result has 304 places, 386 transitions, 5542 flow [2024-06-14 13:29:37,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5300, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5542, PETRI_PLACES=304, PETRI_TRANSITIONS=386} [2024-06-14 13:29:37,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-14 13:29:37,707 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 386 transitions, 5542 flow [2024-06-14 13:29:37,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:37,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:37,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:37,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:29:37,708 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:37,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:37,708 INFO L85 PathProgramCache]: Analyzing trace with hash 157024645, now seen corresponding path program 16 times [2024-06-14 13:29:37,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:37,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412175403] [2024-06-14 13:29:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:37,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:39,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:39,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412175403] [2024-06-14 13:29:39,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412175403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:39,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:39,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:29:39,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482863744] [2024-06-14 13:29:39,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:39,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:29:39,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:39,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:29:39,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:29:39,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:39,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 386 transitions, 5542 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:39,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:39,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:39,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:41,426 INFO L124 PetriNetUnfolderBase]: 4342/6680 cut-off events. [2024-06-14 13:29:41,426 INFO L125 PetriNetUnfolderBase]: For 513155/513155 co-relation queries the response was YES. [2024-06-14 13:29:41,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54194 conditions, 6680 events. 4342/6680 cut-off events. For 513155/513155 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 38286 event pairs, 856 based on Foata normal form. 4/6684 useless extension candidates. Maximal degree in co-relation 54046. Up to 6068 conditions per place. [2024-06-14 13:29:41,558 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 328 selfloop transitions, 91 changer transitions 0/422 dead transitions. [2024-06-14 13:29:41,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 422 transitions, 6537 flow [2024-06-14 13:29:41,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:29:41,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 13:29:41,560 INFO L175 Difference]: Start difference. First operand has 304 places, 386 transitions, 5542 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:29:41,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 422 transitions, 6537 flow [2024-06-14 13:29:42,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 422 transitions, 6265 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-14 13:29:42,730 INFO L231 Difference]: Finished difference. Result has 304 places, 387 transitions, 5495 flow [2024-06-14 13:29:42,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5290, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5495, PETRI_PLACES=304, PETRI_TRANSITIONS=387} [2024-06-14 13:29:42,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-14 13:29:42,731 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 387 transitions, 5495 flow [2024-06-14 13:29:42,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:42,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:42,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:42,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:29:42,731 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:42,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:42,732 INFO L85 PathProgramCache]: Analyzing trace with hash 157030597, now seen corresponding path program 8 times [2024-06-14 13:29:42,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:42,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899308145] [2024-06-14 13:29:42,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:42,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:44,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:44,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899308145] [2024-06-14 13:29:44,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899308145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:44,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:44,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:29:44,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87358155] [2024-06-14 13:29:44,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:44,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:29:44,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:29:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:29:44,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:44,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 387 transitions, 5495 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:44,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:44,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:44,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:45,918 INFO L124 PetriNetUnfolderBase]: 4417/6805 cut-off events. [2024-06-14 13:29:45,918 INFO L125 PetriNetUnfolderBase]: For 555756/555756 co-relation queries the response was YES. [2024-06-14 13:29:45,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54794 conditions, 6805 events. 4417/6805 cut-off events. For 555756/555756 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39196 event pairs, 856 based on Foata normal form. 20/6825 useless extension candidates. Maximal degree in co-relation 54645. Up to 5943 conditions per place. [2024-06-14 13:29:46,017 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 334 selfloop transitions, 95 changer transitions 0/432 dead transitions. [2024-06-14 13:29:46,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 432 transitions, 6563 flow [2024-06-14 13:29:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:29:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:29:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 13:29:46,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:29:46,019 INFO L175 Difference]: Start difference. First operand has 304 places, 387 transitions, 5495 flow. Second operand 10 states and 170 transitions. [2024-06-14 13:29:46,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 432 transitions, 6563 flow [2024-06-14 13:29:46,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 432 transitions, 6379 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:29:46,903 INFO L231 Difference]: Finished difference. Result has 307 places, 388 transitions, 5551 flow [2024-06-14 13:29:46,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5311, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5551, PETRI_PLACES=307, PETRI_TRANSITIONS=388} [2024-06-14 13:29:46,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-14 13:29:46,904 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 388 transitions, 5551 flow [2024-06-14 13:29:46,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:46,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:46,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:46,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:29:46,905 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:46,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:46,905 INFO L85 PathProgramCache]: Analyzing trace with hash -571980307, now seen corresponding path program 17 times [2024-06-14 13:29:46,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:46,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598580119] [2024-06-14 13:29:46,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:46,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:48,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:48,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598580119] [2024-06-14 13:29:48,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598580119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:48,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:48,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:29:48,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979972059] [2024-06-14 13:29:48,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:48,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:29:48,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:48,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:29:48,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:29:48,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:48,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 388 transitions, 5551 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:29:48,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:48,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:48,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:50,151 INFO L124 PetriNetUnfolderBase]: 4434/6836 cut-off events. [2024-06-14 13:29:50,151 INFO L125 PetriNetUnfolderBase]: For 544671/544673 co-relation queries the response was YES. [2024-06-14 13:29:50,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55464 conditions, 6836 events. 4434/6836 cut-off events. For 544671/544673 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 39459 event pairs, 849 based on Foata normal form. 6/6842 useless extension candidates. Maximal degree in co-relation 55314. Up to 5697 conditions per place. [2024-06-14 13:29:50,236 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 289 selfloop transitions, 133 changer transitions 0/425 dead transitions. [2024-06-14 13:29:50,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 425 transitions, 6609 flow [2024-06-14 13:29:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:29:50,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-14 13:29:50,238 INFO L175 Difference]: Start difference. First operand has 307 places, 388 transitions, 5551 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:29:50,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 425 transitions, 6609 flow [2024-06-14 13:29:51,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 425 transitions, 6395 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 13:29:51,215 INFO L231 Difference]: Finished difference. Result has 308 places, 390 transitions, 5702 flow [2024-06-14 13:29:51,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5337, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5702, PETRI_PLACES=308, PETRI_TRANSITIONS=390} [2024-06-14 13:29:51,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-14 13:29:51,216 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 390 transitions, 5702 flow [2024-06-14 13:29:51,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:29:51,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:51,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:51,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:29:51,217 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)] === [2024-06-14 13:29:51,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:51,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2065422669, now seen corresponding path program 9 times [2024-06-14 13:29:51,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:51,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551129965] [2024-06-14 13:29:51,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:51,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:52,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:52,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551129965] [2024-06-14 13:29:52,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551129965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:52,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:52,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:29:52,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043824571] [2024-06-14 13:29:52,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:52,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:29:52,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:52,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:29:52,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:29:53,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:53,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 390 transitions, 5702 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:29:53,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:53,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:53,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:54,774 INFO L124 PetriNetUnfolderBase]: 4509/6961 cut-off events. [2024-06-14 13:29:54,775 INFO L125 PetriNetUnfolderBase]: For 578711/578713 co-relation queries the response was YES. [2024-06-14 13:29:54,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56303 conditions, 6961 events. 4509/6961 cut-off events. For 578711/578713 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 40438 event pairs, 859 based on Foata normal form. 22/6983 useless extension candidates. Maximal degree in co-relation 56152. Up to 5702 conditions per place. [2024-06-14 13:29:54,881 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 298 selfloop transitions, 134 changer transitions 0/435 dead transitions. [2024-06-14 13:29:54,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 435 transitions, 6776 flow [2024-06-14 13:29:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:29:54,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:29:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 13:29:54,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-14 13:29:54,882 INFO L175 Difference]: Start difference. First operand has 308 places, 390 transitions, 5702 flow. Second operand 10 states and 177 transitions. [2024-06-14 13:29:54,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 435 transitions, 6776 flow [2024-06-14 13:29:56,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 435 transitions, 6429 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 13:29:56,093 INFO L231 Difference]: Finished difference. Result has 311 places, 391 transitions, 5673 flow [2024-06-14 13:29:56,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5673, PETRI_PLACES=311, PETRI_TRANSITIONS=391} [2024-06-14 13:29:56,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-14 13:29:56,094 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 391 transitions, 5673 flow [2024-06-14 13:29:56,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:29:56,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:56,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:56,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:29:56,094 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)] === [2024-06-14 13:29:56,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:56,095 INFO L85 PathProgramCache]: Analyzing trace with hash -2070935151, now seen corresponding path program 18 times [2024-06-14 13:29:56,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:56,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000009694] [2024-06-14 13:29:56,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:56,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:57,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:57,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000009694] [2024-06-14 13:29:57,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000009694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:57,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:57,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:29:57,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234549340] [2024-06-14 13:29:57,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:57,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:29:57,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:57,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:29:57,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:29:57,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:29:57,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 391 transitions, 5673 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:29:57,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:57,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:29:57,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:59,435 INFO L124 PetriNetUnfolderBase]: 4526/6988 cut-off events. [2024-06-14 13:29:59,435 INFO L125 PetriNetUnfolderBase]: For 563989/563991 co-relation queries the response was YES. [2024-06-14 13:29:59,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56700 conditions, 6988 events. 4526/6988 cut-off events. For 563989/563991 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 40648 event pairs, 869 based on Foata normal form. 6/6994 useless extension candidates. Maximal degree in co-relation 56548. Up to 5849 conditions per place. [2024-06-14 13:29:59,522 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 288 selfloop transitions, 135 changer transitions 0/426 dead transitions. [2024-06-14 13:29:59,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 426 transitions, 6731 flow [2024-06-14 13:29:59,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:29:59,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 13:29:59,524 INFO L175 Difference]: Start difference. First operand has 311 places, 391 transitions, 5673 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:29:59,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 426 transitions, 6731 flow [2024-06-14 13:30:00,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 426 transitions, 6443 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 13:30:00,533 INFO L231 Difference]: Finished difference. Result has 312 places, 393 transitions, 5758 flow [2024-06-14 13:30:00,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5385, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5758, PETRI_PLACES=312, PETRI_TRANSITIONS=393} [2024-06-14 13:30:00,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-14 13:30:00,537 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 393 transitions, 5758 flow [2024-06-14 13:30:00,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:30:00,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:00,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:00,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:30:00,539 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)] === [2024-06-14 13:30:00,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:00,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2070785049, now seen corresponding path program 10 times [2024-06-14 13:30:00,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:00,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252887319] [2024-06-14 13:30:00,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:00,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:02,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:02,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252887319] [2024-06-14 13:30:02,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252887319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:02,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:02,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:30:02,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896487626] [2024-06-14 13:30:02,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:02,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:30:02,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:02,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:30:02,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:30:02,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:02,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 393 transitions, 5758 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:30:02,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:02,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:02,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:03,865 INFO L124 PetriNetUnfolderBase]: 4601/7113 cut-off events. [2024-06-14 13:30:03,865 INFO L125 PetriNetUnfolderBase]: For 614841/614843 co-relation queries the response was YES. [2024-06-14 13:30:03,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57625 conditions, 7113 events. 4601/7113 cut-off events. For 614841/614843 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41603 event pairs, 883 based on Foata normal form. 22/7135 useless extension candidates. Maximal degree in co-relation 57472. Up to 6236 conditions per place. [2024-06-14 13:30:03,973 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 333 selfloop transitions, 100 changer transitions 0/436 dead transitions. [2024-06-14 13:30:03,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 436 transitions, 6830 flow [2024-06-14 13:30:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:30:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:30:03,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 13:30:03,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-14 13:30:03,974 INFO L175 Difference]: Start difference. First operand has 312 places, 393 transitions, 5758 flow. Second operand 10 states and 171 transitions. [2024-06-14 13:30:03,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 436 transitions, 6830 flow [2024-06-14 13:30:05,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 436 transitions, 6475 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 13:30:05,136 INFO L231 Difference]: Finished difference. Result has 315 places, 394 transitions, 5652 flow [2024-06-14 13:30:05,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5403, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5652, PETRI_PLACES=315, PETRI_TRANSITIONS=394} [2024-06-14 13:30:05,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-14 13:30:05,136 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 394 transitions, 5652 flow [2024-06-14 13:30:05,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:30:05,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:05,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:05,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:30:05,137 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)] === [2024-06-14 13:30:05,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:05,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2070938871, now seen corresponding path program 19 times [2024-06-14 13:30:05,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:05,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466408422] [2024-06-14 13:30:05,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:05,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:06,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:06,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466408422] [2024-06-14 13:30:06,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466408422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:06,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:06,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:30:06,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118528289] [2024-06-14 13:30:06,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:06,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:30:06,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:06,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:30:06,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:30:06,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:06,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 394 transitions, 5652 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:30:06,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:06,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:06,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:08,838 INFO L124 PetriNetUnfolderBase]: 4729/7321 cut-off events. [2024-06-14 13:30:08,839 INFO L125 PetriNetUnfolderBase]: For 648980/648982 co-relation queries the response was YES. [2024-06-14 13:30:08,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60496 conditions, 7321 events. 4729/7321 cut-off events. For 648980/648982 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 43187 event pairs, 914 based on Foata normal form. 6/7327 useless extension candidates. Maximal degree in co-relation 60342. Up to 5933 conditions per place. [2024-06-14 13:30:08,925 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 294 selfloop transitions, 141 changer transitions 0/438 dead transitions. [2024-06-14 13:30:08,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 438 transitions, 7132 flow [2024-06-14 13:30:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:30:08,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:30:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:30:08,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:30:08,927 INFO L175 Difference]: Start difference. First operand has 315 places, 394 transitions, 5652 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:30:08,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 438 transitions, 7132 flow [2024-06-14 13:30:10,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 438 transitions, 6907 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 13:30:10,102 INFO L231 Difference]: Finished difference. Result has 317 places, 399 transitions, 5931 flow [2024-06-14 13:30:10,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5427, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5931, PETRI_PLACES=317, PETRI_TRANSITIONS=399} [2024-06-14 13:30:10,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-14 13:30:10,103 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 399 transitions, 5931 flow [2024-06-14 13:30:10,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:30:10,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:10,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:10,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:30:10,103 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)] === [2024-06-14 13:30:10,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:10,104 INFO L85 PathProgramCache]: Analyzing trace with hash 67891447, now seen corresponding path program 11 times [2024-06-14 13:30:10,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:10,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709965693] [2024-06-14 13:30:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:10,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:11,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:11,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709965693] [2024-06-14 13:30:11,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709965693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:11,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:11,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:30:11,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747535531] [2024-06-14 13:30:11,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:11,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:30:11,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:11,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:30:11,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:30:11,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:11,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 399 transitions, 5931 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-14 13:30:11,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:11,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:11,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:13,423 INFO L124 PetriNetUnfolderBase]: 4787/7419 cut-off events. [2024-06-14 13:30:13,423 INFO L125 PetriNetUnfolderBase]: For 697578/697580 co-relation queries the response was YES. [2024-06-14 13:30:13,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61724 conditions, 7419 events. 4787/7419 cut-off events. For 697578/697580 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 43938 event pairs, 881 based on Foata normal form. 18/7437 useless extension candidates. Maximal degree in co-relation 61568. Up to 5970 conditions per place. [2024-06-14 13:30:13,547 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 301 selfloop transitions, 142 changer transitions 0/446 dead transitions. [2024-06-14 13:30:13,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 446 transitions, 7382 flow [2024-06-14 13:30:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:30:13,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:30:13,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 13:30:13,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-14 13:30:13,549 INFO L175 Difference]: Start difference. First operand has 317 places, 399 transitions, 5931 flow. Second operand 9 states and 166 transitions. [2024-06-14 13:30:13,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 446 transitions, 7382 flow [2024-06-14 13:30:15,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 446 transitions, 7090 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-14 13:30:15,011 INFO L231 Difference]: Finished difference. Result has 322 places, 401 transitions, 6058 flow [2024-06-14 13:30:15,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5659, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6058, PETRI_PLACES=322, PETRI_TRANSITIONS=401} [2024-06-14 13:30:15,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-14 13:30:15,012 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 401 transitions, 6058 flow [2024-06-14 13:30:15,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-14 13:30:15,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:15,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:15,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:30:15,013 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:15,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:15,013 INFO L85 PathProgramCache]: Analyzing trace with hash 67884007, now seen corresponding path program 12 times [2024-06-14 13:30:15,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:15,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63925842] [2024-06-14 13:30:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:15,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:16,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:16,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63925842] [2024-06-14 13:30:16,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63925842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:16,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:16,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:30:16,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828484901] [2024-06-14 13:30:16,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:16,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:30:16,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:16,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:30:16,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:30:16,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:16,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 401 transitions, 6058 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:30:16,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:16,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:16,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:18,358 INFO L124 PetriNetUnfolderBase]: 4751/7363 cut-off events. [2024-06-14 13:30:18,358 INFO L125 PetriNetUnfolderBase]: For 670412/670414 co-relation queries the response was YES. [2024-06-14 13:30:18,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60319 conditions, 7363 events. 4751/7363 cut-off events. For 670412/670414 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 43570 event pairs, 868 based on Foata normal form. 22/7385 useless extension candidates. Maximal degree in co-relation 60160. Up to 6122 conditions per place. [2024-06-14 13:30:18,467 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 290 selfloop transitions, 153 changer transitions 0/446 dead transitions. [2024-06-14 13:30:18,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 446 transitions, 7160 flow [2024-06-14 13:30:18,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:30:18,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:30:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 13:30:18,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-14 13:30:18,469 INFO L175 Difference]: Start difference. First operand has 322 places, 401 transitions, 6058 flow. Second operand 10 states and 174 transitions. [2024-06-14 13:30:18,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 446 transitions, 7160 flow [2024-06-14 13:30:19,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 446 transitions, 6833 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 13:30:19,832 INFO L231 Difference]: Finished difference. Result has 326 places, 402 transitions, 6088 flow [2024-06-14 13:30:19,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5732, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6088, PETRI_PLACES=326, PETRI_TRANSITIONS=402} [2024-06-14 13:30:19,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-14 13:30:19,833 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 402 transitions, 6088 flow [2024-06-14 13:30:19,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:30:19,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:19,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:19,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:30:19,833 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:19,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:19,834 INFO L85 PathProgramCache]: Analyzing trace with hash 381850147, now seen corresponding path program 13 times [2024-06-14 13:30:19,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:19,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997032053] [2024-06-14 13:30:19,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:19,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:21,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:21,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997032053] [2024-06-14 13:30:21,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997032053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:21,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:21,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:30:21,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473421571] [2024-06-14 13:30:21,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:21,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:30:21,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:30:21,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:30:21,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:21,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 402 transitions, 6088 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:30:21,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:21,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:21,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:23,282 INFO L124 PetriNetUnfolderBase]: 4759/7383 cut-off events. [2024-06-14 13:30:23,282 INFO L125 PetriNetUnfolderBase]: For 657401/657403 co-relation queries the response was YES. [2024-06-14 13:30:23,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59886 conditions, 7383 events. 4759/7383 cut-off events. For 657401/657403 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 43474 event pairs, 697 based on Foata normal form. 18/7401 useless extension candidates. Maximal degree in co-relation 59726. Up to 4266 conditions per place. [2024-06-14 13:30:23,402 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 279 selfloop transitions, 172 changer transitions 0/454 dead transitions. [2024-06-14 13:30:23,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 454 transitions, 7528 flow [2024-06-14 13:30:23,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:30:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:30:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 13:30:23,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:30:23,404 INFO L175 Difference]: Start difference. First operand has 326 places, 402 transitions, 6088 flow. Second operand 10 states and 180 transitions. [2024-06-14 13:30:23,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 454 transitions, 7528 flow [2024-06-14 13:30:24,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 454 transitions, 7161 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:30:24,839 INFO L231 Difference]: Finished difference. Result has 328 places, 403 transitions, 6133 flow [2024-06-14 13:30:24,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5721, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6133, PETRI_PLACES=328, PETRI_TRANSITIONS=403} [2024-06-14 13:30:24,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-14 13:30:24,840 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 403 transitions, 6133 flow [2024-06-14 13:30:24,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:30:24,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:24,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:24,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:30:24,841 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:24,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:24,841 INFO L85 PathProgramCache]: Analyzing trace with hash -187634973, now seen corresponding path program 20 times [2024-06-14 13:30:24,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:24,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036631763] [2024-06-14 13:30:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:24,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:26,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:26,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036631763] [2024-06-14 13:30:26,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036631763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:26,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:26,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:30:26,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884766756] [2024-06-14 13:30:26,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:26,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:30:26,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:26,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:30:26,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:30:26,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:26,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 403 transitions, 6133 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:26,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:26,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:26,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:28,206 INFO L124 PetriNetUnfolderBase]: 4751/7371 cut-off events. [2024-06-14 13:30:28,206 INFO L125 PetriNetUnfolderBase]: For 633774/633776 co-relation queries the response was YES. [2024-06-14 13:30:28,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59630 conditions, 7371 events. 4751/7371 cut-off events. For 633774/633776 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 43725 event pairs, 883 based on Foata normal form. 6/7377 useless extension candidates. Maximal degree in co-relation 59471. Up to 6112 conditions per place. [2024-06-14 13:30:28,316 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 296 selfloop transitions, 142 changer transitions 0/441 dead transitions. [2024-06-14 13:30:28,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 441 transitions, 7161 flow [2024-06-14 13:30:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:30:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:30:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 13:30:28,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-14 13:30:28,318 INFO L175 Difference]: Start difference. First operand has 328 places, 403 transitions, 6133 flow. Second operand 9 states and 160 transitions. [2024-06-14 13:30:28,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 441 transitions, 7161 flow [2024-06-14 13:30:29,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 441 transitions, 6689 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-14 13:30:29,713 INFO L231 Difference]: Finished difference. Result has 329 places, 403 transitions, 5955 flow [2024-06-14 13:30:29,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5661, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5955, PETRI_PLACES=329, PETRI_TRANSITIONS=403} [2024-06-14 13:30:29,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-14 13:30:29,714 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 403 transitions, 5955 flow [2024-06-14 13:30:29,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:29,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:29,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:29,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:30:29,714 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:29,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:29,715 INFO L85 PathProgramCache]: Analyzing trace with hash -187629021, now seen corresponding path program 14 times [2024-06-14 13:30:29,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:29,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615434210] [2024-06-14 13:30:29,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:29,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:31,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:31,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615434210] [2024-06-14 13:30:31,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615434210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:31,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:31,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:30:31,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250141699] [2024-06-14 13:30:31,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:31,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:30:31,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:31,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:30:31,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:30:31,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:31,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 403 transitions, 5955 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:30:31,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:31,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:31,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:33,232 INFO L124 PetriNetUnfolderBase]: 4715/7315 cut-off events. [2024-06-14 13:30:33,232 INFO L125 PetriNetUnfolderBase]: For 628665/628667 co-relation queries the response was YES. [2024-06-14 13:30:33,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57009 conditions, 7315 events. 4715/7315 cut-off events. For 628665/628667 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 43284 event pairs, 865 based on Foata normal form. 22/7337 useless extension candidates. Maximal degree in co-relation 56849. Up to 5936 conditions per place. [2024-06-14 13:30:33,336 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 300 selfloop transitions, 143 changer transitions 0/446 dead transitions. [2024-06-14 13:30:33,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 446 transitions, 7011 flow [2024-06-14 13:30:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:30:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:30:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-14 13:30:33,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:30:33,339 INFO L175 Difference]: Start difference. First operand has 329 places, 403 transitions, 5955 flow. Second operand 10 states and 175 transitions. [2024-06-14 13:30:33,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 446 transitions, 7011 flow [2024-06-14 13:30:34,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 446 transitions, 6712 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 13:30:34,608 INFO L231 Difference]: Finished difference. Result has 331 places, 403 transitions, 5955 flow [2024-06-14 13:30:34,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5656, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5955, PETRI_PLACES=331, PETRI_TRANSITIONS=403} [2024-06-14 13:30:34,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-14 13:30:34,609 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 403 transitions, 5955 flow [2024-06-14 13:30:34,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-14 13:30:34,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:34,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:34,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:30:34,610 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)] === [2024-06-14 13:30:34,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:34,610 INFO L85 PathProgramCache]: Analyzing trace with hash 798194447, now seen corresponding path program 1 times [2024-06-14 13:30:34,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:34,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128812235] [2024-06-14 13:30:34,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:34,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:35,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:35,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128812235] [2024-06-14 13:30:35,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128812235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:35,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:35,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:35,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496637813] [2024-06-14 13:30:35,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:35,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:35,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:35,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:35,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:35,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:35,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 403 transitions, 5955 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:30:35,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:35,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:35,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:37,787 INFO L124 PetriNetUnfolderBase]: 4746/7369 cut-off events. [2024-06-14 13:30:37,787 INFO L125 PetriNetUnfolderBase]: For 595767/595767 co-relation queries the response was YES. [2024-06-14 13:30:37,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57418 conditions, 7369 events. 4746/7369 cut-off events. For 595767/595767 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 44096 event pairs, 1995 based on Foata normal form. 3/7372 useless extension candidates. Maximal degree in co-relation 57257. Up to 7202 conditions per place. [2024-06-14 13:30:37,954 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 393 selfloop transitions, 43 changer transitions 0/439 dead transitions. [2024-06-14 13:30:37,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 439 transitions, 7233 flow [2024-06-14 13:30:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:30:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:30:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:30:37,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:30:37,956 INFO L175 Difference]: Start difference. First operand has 331 places, 403 transitions, 5955 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:30:37,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 439 transitions, 7233 flow [2024-06-14 13:30:40,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 439 transitions, 6922 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 13:30:40,113 INFO L231 Difference]: Finished difference. Result has 332 places, 411 transitions, 5884 flow [2024-06-14 13:30:40,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5646, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5884, PETRI_PLACES=332, PETRI_TRANSITIONS=411} [2024-06-14 13:30:40,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-14 13:30:40,113 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 411 transitions, 5884 flow [2024-06-14 13:30:40,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:30:40,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:40,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:40,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:30:40,114 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)] === [2024-06-14 13:30:40,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:40,114 INFO L85 PathProgramCache]: Analyzing trace with hash -198465717, now seen corresponding path program 2 times [2024-06-14 13:30:40,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:40,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192472322] [2024-06-14 13:30:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:40,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:41,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:41,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192472322] [2024-06-14 13:30:41,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192472322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:41,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:41,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:41,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702810963] [2024-06-14 13:30:41,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:41,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:41,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:41,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:41,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:41,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:41,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 411 transitions, 5884 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:30:41,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:41,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:41,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:42,904 INFO L124 PetriNetUnfolderBase]: 4806/7444 cut-off events. [2024-06-14 13:30:42,905 INFO L125 PetriNetUnfolderBase]: For 595824/595828 co-relation queries the response was YES. [2024-06-14 13:30:42,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58053 conditions, 7444 events. 4806/7444 cut-off events. For 595824/595828 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 44341 event pairs, 1377 based on Foata normal form. 7/7451 useless extension candidates. Maximal degree in co-relation 57891. Up to 7167 conditions per place. [2024-06-14 13:30:43,020 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 377 selfloop transitions, 70 changer transitions 0/450 dead transitions. [2024-06-14 13:30:43,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 450 transitions, 7306 flow [2024-06-14 13:30:43,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:43,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:43,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:30:43,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:30:43,021 INFO L175 Difference]: Start difference. First operand has 332 places, 411 transitions, 5884 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:30:43,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 450 transitions, 7306 flow [2024-06-14 13:30:44,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 450 transitions, 7197 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 13:30:44,802 INFO L231 Difference]: Finished difference. Result has 336 places, 431 transitions, 6261 flow [2024-06-14 13:30:44,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5781, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6261, PETRI_PLACES=336, PETRI_TRANSITIONS=431} [2024-06-14 13:30:44,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-14 13:30:44,803 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 431 transitions, 6261 flow [2024-06-14 13:30:44,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:30:44,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:44,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:44,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:30:44,803 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)] === [2024-06-14 13:30:44,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:44,804 INFO L85 PathProgramCache]: Analyzing trace with hash -831082122, now seen corresponding path program 1 times [2024-06-14 13:30:44,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:44,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744826679] [2024-06-14 13:30:44,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:44,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:45,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:45,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744826679] [2024-06-14 13:30:45,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744826679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:45,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:45,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:45,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638336254] [2024-06-14 13:30:45,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:45,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:45,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:45,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:45,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:45,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:45,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 431 transitions, 6261 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:30:45,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:45,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:45,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:47,707 INFO L124 PetriNetUnfolderBase]: 4800/7445 cut-off events. [2024-06-14 13:30:47,707 INFO L125 PetriNetUnfolderBase]: For 610317/610317 co-relation queries the response was YES. [2024-06-14 13:30:47,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58732 conditions, 7445 events. 4800/7445 cut-off events. For 610317/610317 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 44486 event pairs, 2000 based on Foata normal form. 2/7447 useless extension candidates. Maximal degree in co-relation 58567. Up to 7330 conditions per place. [2024-06-14 13:30:47,818 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 419 selfloop transitions, 30 changer transitions 0/452 dead transitions. [2024-06-14 13:30:47,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 452 transitions, 7327 flow [2024-06-14 13:30:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:30:47,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:30:47,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 13:30:47,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:30:47,820 INFO L175 Difference]: Start difference. First operand has 336 places, 431 transitions, 6261 flow. Second operand 6 states and 105 transitions. [2024-06-14 13:30:47,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 452 transitions, 7327 flow [2024-06-14 13:30:49,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 452 transitions, 7187 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-14 13:30:49,630 INFO L231 Difference]: Finished difference. Result has 340 places, 434 transitions, 6280 flow [2024-06-14 13:30:49,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6121, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6280, PETRI_PLACES=340, PETRI_TRANSITIONS=434} [2024-06-14 13:30:49,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-14 13:30:49,631 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 434 transitions, 6280 flow [2024-06-14 13:30:49,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:30:49,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:49,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:49,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:30:49,634 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)] === [2024-06-14 13:30:49,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:49,634 INFO L85 PathProgramCache]: Analyzing trace with hash -838439507, now seen corresponding path program 3 times [2024-06-14 13:30:49,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:49,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924167814] [2024-06-14 13:30:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:49,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:50,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:50,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924167814] [2024-06-14 13:30:50,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924167814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:50,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:50,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:50,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217339938] [2024-06-14 13:30:50,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:50,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:50,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:50,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:50,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:50,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:50,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 434 transitions, 6280 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:30:50,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:50,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:50,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:52,428 INFO L124 PetriNetUnfolderBase]: 4807/7455 cut-off events. [2024-06-14 13:30:52,428 INFO L125 PetriNetUnfolderBase]: For 622461/622461 co-relation queries the response was YES. [2024-06-14 13:30:52,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59090 conditions, 7455 events. 4807/7455 cut-off events. For 622461/622461 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 44586 event pairs, 2006 based on Foata normal form. 3/7458 useless extension candidates. Maximal degree in co-relation 58923. Up to 7342 conditions per place. [2024-06-14 13:30:52,544 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 427 selfloop transitions, 29 changer transitions 0/459 dead transitions. [2024-06-14 13:30:52,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 459 transitions, 7343 flow [2024-06-14 13:30:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:52,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:30:52,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-14 13:30:52,546 INFO L175 Difference]: Start difference. First operand has 340 places, 434 transitions, 6280 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:30:52,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 459 transitions, 7343 flow [2024-06-14 13:30:54,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 459 transitions, 7227 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:30:54,234 INFO L231 Difference]: Finished difference. Result has 342 places, 437 transitions, 6284 flow [2024-06-14 13:30:54,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6164, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6284, PETRI_PLACES=342, PETRI_TRANSITIONS=437} [2024-06-14 13:30:54,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-14 13:30:54,235 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 437 transitions, 6284 flow [2024-06-14 13:30:54,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:30:54,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:54,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:54,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:30:54,235 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:54,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1465903481, now seen corresponding path program 1 times [2024-06-14 13:30:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:54,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392637057] [2024-06-14 13:30:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:54,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:55,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:55,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392637057] [2024-06-14 13:30:55,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392637057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:55,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:55,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:30:55,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143205425] [2024-06-14 13:30:55,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:55,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:30:55,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:55,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:30:55,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:30:55,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:30:55,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 437 transitions, 6284 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:55,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:55,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:30:55,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:57,767 INFO L124 PetriNetUnfolderBase]: 4875/7560 cut-off events. [2024-06-14 13:30:57,767 INFO L125 PetriNetUnfolderBase]: For 646929/646931 co-relation queries the response was YES. [2024-06-14 13:30:57,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59869 conditions, 7560 events. 4875/7560 cut-off events. For 646929/646931 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 45188 event pairs, 1039 based on Foata normal form. 14/7574 useless extension candidates. Maximal degree in co-relation 59702. Up to 7192 conditions per place. [2024-06-14 13:30:57,883 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 435 selfloop transitions, 47 changer transitions 0/485 dead transitions. [2024-06-14 13:30:57,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 485 transitions, 7504 flow [2024-06-14 13:30:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:30:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:30:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-14 13:30:57,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-14 13:30:57,885 INFO L175 Difference]: Start difference. First operand has 342 places, 437 transitions, 6284 flow. Second operand 11 states and 182 transitions. [2024-06-14 13:30:57,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 485 transitions, 7504 flow [2024-06-14 13:30:59,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 485 transitions, 7411 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:30:59,497 INFO L231 Difference]: Finished difference. Result has 348 places, 439 transitions, 6383 flow [2024-06-14 13:30:59,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6191, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6383, PETRI_PLACES=348, PETRI_TRANSITIONS=439} [2024-06-14 13:30:59,497 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-14 13:30:59,497 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 439 transitions, 6383 flow [2024-06-14 13:30:59,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:59,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:59,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:59,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:30:59,498 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:59,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:59,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1201331453, now seen corresponding path program 2 times [2024-06-14 13:30:59,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:59,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820685158] [2024-06-14 13:30:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:59,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:01,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:01,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820685158] [2024-06-14 13:31:01,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820685158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:01,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:01,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:31:01,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012298890] [2024-06-14 13:31:01,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:01,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:31:01,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:01,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:31:01,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:31:01,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:01,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 439 transitions, 6383 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:01,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:01,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:01,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:03,185 INFO L124 PetriNetUnfolderBase]: 4943/7676 cut-off events. [2024-06-14 13:31:03,185 INFO L125 PetriNetUnfolderBase]: For 670171/670173 co-relation queries the response was YES. [2024-06-14 13:31:03,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61012 conditions, 7676 events. 4943/7676 cut-off events. For 670171/670173 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46161 event pairs, 1037 based on Foata normal form. 14/7690 useless extension candidates. Maximal degree in co-relation 60844. Up to 7244 conditions per place. [2024-06-14 13:31:03,303 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 432 selfloop transitions, 52 changer transitions 0/487 dead transitions. [2024-06-14 13:31:03,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 487 transitions, 7599 flow [2024-06-14 13:31:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:31:03,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:31:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-14 13:31:03,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-14 13:31:03,305 INFO L175 Difference]: Start difference. First operand has 348 places, 439 transitions, 6383 flow. Second operand 11 states and 183 transitions. [2024-06-14 13:31:03,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 487 transitions, 7599 flow [2024-06-14 13:31:05,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 487 transitions, 7446 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-14 13:31:05,145 INFO L231 Difference]: Finished difference. Result has 350 places, 441 transitions, 6424 flow [2024-06-14 13:31:05,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6230, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6424, PETRI_PLACES=350, PETRI_TRANSITIONS=441} [2024-06-14 13:31:05,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-14 13:31:05,146 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 441 transitions, 6424 flow [2024-06-14 13:31:05,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:05,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:05,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:05,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:31:05,146 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:31:05,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:05,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1143239003, now seen corresponding path program 3 times [2024-06-14 13:31:05,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:05,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206494606] [2024-06-14 13:31:05,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:05,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:06,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:06,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206494606] [2024-06-14 13:31:06,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206494606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:06,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:06,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:31:06,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443813739] [2024-06-14 13:31:06,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:06,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:31:06,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:06,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:31:06,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:31:06,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:06,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 441 transitions, 6424 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:06,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:06,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:06,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:09,003 INFO L124 PetriNetUnfolderBase]: 5011/7788 cut-off events. [2024-06-14 13:31:09,003 INFO L125 PetriNetUnfolderBase]: For 686729/686731 co-relation queries the response was YES. [2024-06-14 13:31:09,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61771 conditions, 7788 events. 5011/7788 cut-off events. For 686729/686731 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46993 event pairs, 1071 based on Foata normal form. 14/7802 useless extension candidates. Maximal degree in co-relation 61602. Up to 7381 conditions per place. [2024-06-14 13:31:09,109 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 437 selfloop transitions, 50 changer transitions 0/490 dead transitions. [2024-06-14 13:31:09,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 490 transitions, 7651 flow [2024-06-14 13:31:09,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:31:09,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:31:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-14 13:31:09,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-14 13:31:09,110 INFO L175 Difference]: Start difference. First operand has 350 places, 441 transitions, 6424 flow. Second operand 11 states and 181 transitions. [2024-06-14 13:31:09,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 490 transitions, 7651 flow [2024-06-14 13:31:10,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 490 transitions, 7504 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-14 13:31:10,526 INFO L231 Difference]: Finished difference. Result has 353 places, 443 transitions, 6472 flow [2024-06-14 13:31:10,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6277, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6472, PETRI_PLACES=353, PETRI_TRANSITIONS=443} [2024-06-14 13:31:10,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-14 13:31:10,527 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 443 transitions, 6472 flow [2024-06-14 13:31:10,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:10,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:10,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:10,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:31:10,527 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:31:10,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:10,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1419183839, now seen corresponding path program 4 times [2024-06-14 13:31:10,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:10,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294466016] [2024-06-14 13:31:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:10,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:12,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:12,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294466016] [2024-06-14 13:31:12,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294466016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:12,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:12,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 13:31:12,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593988405] [2024-06-14 13:31:12,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:12,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 13:31:12,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 13:31:12,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-14 13:31:12,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:12,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 443 transitions, 6472 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:12,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:12,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:12,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:14,701 INFO L124 PetriNetUnfolderBase]: 5052/7859 cut-off events. [2024-06-14 13:31:14,701 INFO L125 PetriNetUnfolderBase]: For 703611/703611 co-relation queries the response was YES. [2024-06-14 13:31:14,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62300 conditions, 7859 events. 5052/7859 cut-off events. For 703611/703611 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 47540 event pairs, 1046 based on Foata normal form. 12/7871 useless extension candidates. Maximal degree in co-relation 62130. Up to 7370 conditions per place. [2024-06-14 13:31:14,823 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 420 selfloop transitions, 69 changer transitions 0/492 dead transitions. [2024-06-14 13:31:14,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 492 transitions, 7699 flow [2024-06-14 13:31:14,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:31:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:31:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-14 13:31:14,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-14 13:31:14,824 INFO L175 Difference]: Start difference. First operand has 353 places, 443 transitions, 6472 flow. Second operand 11 states and 185 transitions. [2024-06-14 13:31:14,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 492 transitions, 7699 flow [2024-06-14 13:31:16,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 492 transitions, 7529 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-14 13:31:16,438 INFO L231 Difference]: Finished difference. Result has 354 places, 444 transitions, 6516 flow [2024-06-14 13:31:16,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6302, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6516, PETRI_PLACES=354, PETRI_TRANSITIONS=444} [2024-06-14 13:31:16,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-14 13:31:16,439 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 444 transitions, 6516 flow [2024-06-14 13:31:16,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:16,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:16,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:16,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:31:16,439 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:31:16,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:16,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1248481409, now seen corresponding path program 5 times [2024-06-14 13:31:16,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:16,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552566184] [2024-06-14 13:31:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:16,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:18,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:18,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552566184] [2024-06-14 13:31:18,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552566184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:18,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:18,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 13:31:18,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159712004] [2024-06-14 13:31:18,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:18,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 13:31:18,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:18,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 13:31:18,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-14 13:31:18,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:18,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 444 transitions, 6516 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:18,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:18,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:18,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:20,611 INFO L124 PetriNetUnfolderBase]: 5093/7930 cut-off events. [2024-06-14 13:31:20,611 INFO L125 PetriNetUnfolderBase]: For 721148/721148 co-relation queries the response was YES. [2024-06-14 13:31:20,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62906 conditions, 7930 events. 5093/7930 cut-off events. For 721148/721148 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 48117 event pairs, 1056 based on Foata normal form. 12/7942 useless extension candidates. Maximal degree in co-relation 62735. Up to 7441 conditions per place. [2024-06-14 13:31:20,718 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 423 selfloop transitions, 66 changer transitions 0/492 dead transitions. [2024-06-14 13:31:20,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 492 transitions, 7741 flow [2024-06-14 13:31:20,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:31:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:31:20,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-14 13:31:20,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-14 13:31:20,720 INFO L175 Difference]: Start difference. First operand has 354 places, 444 transitions, 6516 flow. Second operand 11 states and 185 transitions. [2024-06-14 13:31:20,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 492 transitions, 7741 flow [2024-06-14 13:31:22,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 492 transitions, 7545 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-14 13:31:22,208 INFO L231 Difference]: Finished difference. Result has 356 places, 445 transitions, 6530 flow [2024-06-14 13:31:22,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6320, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6530, PETRI_PLACES=356, PETRI_TRANSITIONS=445} [2024-06-14 13:31:22,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-14 13:31:22,209 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 445 transitions, 6530 flow [2024-06-14 13:31:22,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:22,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:22,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:22,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:31:22,210 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:31:22,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:22,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1248366089, now seen corresponding path program 6 times [2024-06-14 13:31:22,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:22,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220796231] [2024-06-14 13:31:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:22,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:24,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:24,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220796231] [2024-06-14 13:31:24,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220796231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:24,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:24,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 13:31:24,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029705992] [2024-06-14 13:31:24,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:24,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 13:31:24,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:24,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 13:31:24,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-14 13:31:24,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:24,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 445 transitions, 6530 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:24,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:24,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:24,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:26,458 INFO L124 PetriNetUnfolderBase]: 5134/8001 cut-off events. [2024-06-14 13:31:26,459 INFO L125 PetriNetUnfolderBase]: For 739696/739696 co-relation queries the response was YES. [2024-06-14 13:31:26,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63396 conditions, 8001 events. 5134/8001 cut-off events. For 739696/739696 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 48712 event pairs, 1059 based on Foata normal form. 12/8013 useless extension candidates. Maximal degree in co-relation 63224. Up to 7453 conditions per place. [2024-06-14 13:31:26,584 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 419 selfloop transitions, 71 changer transitions 0/493 dead transitions. [2024-06-14 13:31:26,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 493 transitions, 7759 flow [2024-06-14 13:31:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:31:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:31:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-14 13:31:26,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-14 13:31:26,586 INFO L175 Difference]: Start difference. First operand has 356 places, 445 transitions, 6530 flow. Second operand 11 states and 185 transitions. [2024-06-14 13:31:26,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 493 transitions, 7759 flow [2024-06-14 13:31:28,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 493 transitions, 7567 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-14 13:31:28,487 INFO L231 Difference]: Finished difference. Result has 358 places, 446 transitions, 6560 flow [2024-06-14 13:31:28,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6338, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6560, PETRI_PLACES=358, PETRI_TRANSITIONS=446} [2024-06-14 13:31:28,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-14 13:31:28,488 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 446 transitions, 6560 flow [2024-06-14 13:31:28,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:28,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:28,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:28,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:31:28,489 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)] === [2024-06-14 13:31:28,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:28,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1032375058, now seen corresponding path program 1 times [2024-06-14 13:31:28,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:28,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734021088] [2024-06-14 13:31:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:28,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:30,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:30,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734021088] [2024-06-14 13:31:30,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734021088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:30,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:30,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:30,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438344799] [2024-06-14 13:31:30,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:30,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:30,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:30,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:30,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:30,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:30,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 446 transitions, 6560 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:31:30,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:30,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:30,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:32,423 INFO L124 PetriNetUnfolderBase]: 5278/8203 cut-off events. [2024-06-14 13:31:32,423 INFO L125 PetriNetUnfolderBase]: For 756722/756724 co-relation queries the response was YES. [2024-06-14 13:31:32,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64955 conditions, 8203 events. 5278/8203 cut-off events. For 756722/756724 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 49912 event pairs, 1211 based on Foata normal form. 6/8209 useless extension candidates. Maximal degree in co-relation 64782. Up to 7808 conditions per place. [2024-06-14 13:31:32,529 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 445 selfloop transitions, 66 changer transitions 0/514 dead transitions. [2024-06-14 13:31:32,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 514 transitions, 8536 flow [2024-06-14 13:31:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:32,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:31:32,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:31:32,530 INFO L175 Difference]: Start difference. First operand has 358 places, 446 transitions, 6560 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:31:32,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 514 transitions, 8536 flow [2024-06-14 13:31:34,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 514 transitions, 8332 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-14 13:31:34,509 INFO L231 Difference]: Finished difference. Result has 360 places, 471 transitions, 6834 flow [2024-06-14 13:31:34,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6356, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6834, PETRI_PLACES=360, PETRI_TRANSITIONS=471} [2024-06-14 13:31:34,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-14 13:31:34,510 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 471 transitions, 6834 flow [2024-06-14 13:31:34,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:31:34,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:34,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:34,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:31:34,511 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)] === [2024-06-14 13:31:34,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:34,511 INFO L85 PathProgramCache]: Analyzing trace with hash 486043194, now seen corresponding path program 2 times [2024-06-14 13:31:34,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:34,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527743231] [2024-06-14 13:31:34,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:34,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:35,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:35,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527743231] [2024-06-14 13:31:35,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527743231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:35,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:35,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:35,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563912171] [2024-06-14 13:31:35,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:35,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:35,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:35,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:35,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:35,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:35,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 471 transitions, 6834 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:31:35,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:35,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:35,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:38,171 INFO L124 PetriNetUnfolderBase]: 5298/8229 cut-off events. [2024-06-14 13:31:38,171 INFO L125 PetriNetUnfolderBase]: For 768044/768044 co-relation queries the response was YES. [2024-06-14 13:31:38,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65419 conditions, 8229 events. 5298/8229 cut-off events. For 768044/768044 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 50005 event pairs, 1133 based on Foata normal form. 4/8233 useless extension candidates. Maximal degree in co-relation 65243. Up to 7824 conditions per place. [2024-06-14 13:31:38,307 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 435 selfloop transitions, 73 changer transitions 0/511 dead transitions. [2024-06-14 13:31:38,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 511 transitions, 8377 flow [2024-06-14 13:31:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:31:38,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 13:31:38,309 INFO L175 Difference]: Start difference. First operand has 360 places, 471 transitions, 6834 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:31:38,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 511 transitions, 8377 flow [2024-06-14 13:31:41,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 511 transitions, 8298 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-14 13:31:41,108 INFO L231 Difference]: Finished difference. Result has 368 places, 477 transitions, 7017 flow [2024-06-14 13:31:41,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6763, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7017, PETRI_PLACES=368, PETRI_TRANSITIONS=477} [2024-06-14 13:31:41,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-14 13:31:41,109 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 477 transitions, 7017 flow [2024-06-14 13:31:41,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:31:41,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:41,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:41,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:31:41,110 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)] === [2024-06-14 13:31:41,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:41,111 INFO L85 PathProgramCache]: Analyzing trace with hash -401441856, now seen corresponding path program 3 times [2024-06-14 13:31:41,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:41,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166641481] [2024-06-14 13:31:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:41,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:42,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:42,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166641481] [2024-06-14 13:31:42,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166641481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:42,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:42,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:42,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608269311] [2024-06-14 13:31:42,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:42,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:42,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:42,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:42,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:42,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:42,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 477 transitions, 7017 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:31:42,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:42,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:42,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:45,142 INFO L124 PetriNetUnfolderBase]: 5286/8213 cut-off events. [2024-06-14 13:31:45,143 INFO L125 PetriNetUnfolderBase]: For 772044/772044 co-relation queries the response was YES. [2024-06-14 13:31:45,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65412 conditions, 8213 events. 5286/8213 cut-off events. For 772044/772044 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 49974 event pairs, 1131 based on Foata normal form. 4/8217 useless extension candidates. Maximal degree in co-relation 65233. Up to 7816 conditions per place. [2024-06-14 13:31:45,255 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 439 selfloop transitions, 71 changer transitions 0/513 dead transitions. [2024-06-14 13:31:45,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 513 transitions, 8492 flow [2024-06-14 13:31:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:45,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:31:45,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 13:31:45,257 INFO L175 Difference]: Start difference. First operand has 368 places, 477 transitions, 7017 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:31:45,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 513 transitions, 8492 flow [2024-06-14 13:31:47,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 513 transitions, 8309 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 13:31:47,272 INFO L231 Difference]: Finished difference. Result has 373 places, 478 transitions, 7001 flow [2024-06-14 13:31:47,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6834, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7001, PETRI_PLACES=373, PETRI_TRANSITIONS=478} [2024-06-14 13:31:47,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-14 13:31:47,272 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 478 transitions, 7001 flow [2024-06-14 13:31:47,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:31:47,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:47,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:47,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:31:47,273 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:31:47,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:47,273 INFO L85 PathProgramCache]: Analyzing trace with hash 790581049, now seen corresponding path program 7 times [2024-06-14 13:31:47,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:47,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746578286] [2024-06-14 13:31:47,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:47,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:48,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:48,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746578286] [2024-06-14 13:31:48,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746578286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:48,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:48,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:31:48,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104547352] [2024-06-14 13:31:48,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:48,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:31:48,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:48,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:31:48,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:31:48,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:48,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 478 transitions, 7001 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:48,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:48,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:48,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:51,251 INFO L124 PetriNetUnfolderBase]: 5381/8376 cut-off events. [2024-06-14 13:31:51,252 INFO L125 PetriNetUnfolderBase]: For 819742/819744 co-relation queries the response was YES. [2024-06-14 13:31:51,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66586 conditions, 8376 events. 5381/8376 cut-off events. For 819742/819744 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 51392 event pairs, 1305 based on Foata normal form. 14/8390 useless extension candidates. Maximal degree in co-relation 66405. Up to 7934 conditions per place. [2024-06-14 13:31:51,378 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 474 selfloop transitions, 51 changer transitions 0/528 dead transitions. [2024-06-14 13:31:51,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 528 transitions, 8325 flow [2024-06-14 13:31:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:31:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:31:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-14 13:31:51,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-14 13:31:51,379 INFO L175 Difference]: Start difference. First operand has 373 places, 478 transitions, 7001 flow. Second operand 11 states and 179 transitions. [2024-06-14 13:31:51,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 528 transitions, 8325 flow [2024-06-14 13:31:53,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 528 transitions, 8193 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:53,954 INFO L231 Difference]: Finished difference. Result has 378 places, 481 transitions, 7091 flow [2024-06-14 13:31:53,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6869, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7091, PETRI_PLACES=378, PETRI_TRANSITIONS=481} [2024-06-14 13:31:53,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-14 13:31:53,955 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 481 transitions, 7091 flow [2024-06-14 13:31:53,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:53,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:53,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:53,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:31:53,956 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)] === [2024-06-14 13:31:53,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:53,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1258901060, now seen corresponding path program 4 times [2024-06-14 13:31:53,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:53,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906552665] [2024-06-14 13:31:53,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:53,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:55,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:55,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906552665] [2024-06-14 13:31:55,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906552665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:55,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:55,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:55,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579328187] [2024-06-14 13:31:55,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:55,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:55,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:55,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:55,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:55,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:31:55,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 481 transitions, 7091 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:31:55,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:55,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:31:55,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:57,498 INFO L124 PetriNetUnfolderBase]: 5399/8408 cut-off events. [2024-06-14 13:31:57,499 INFO L125 PetriNetUnfolderBase]: For 800460/800462 co-relation queries the response was YES. [2024-06-14 13:31:57,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66557 conditions, 8408 events. 5399/8408 cut-off events. For 800460/800462 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 51611 event pairs, 1442 based on Foata normal form. 6/8414 useless extension candidates. Maximal degree in co-relation 66375. Up to 7991 conditions per place. [2024-06-14 13:31:57,640 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 438 selfloop transitions, 80 changer transitions 0/521 dead transitions. [2024-06-14 13:31:57,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 521 transitions, 8459 flow [2024-06-14 13:31:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:31:57,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-14 13:31:57,642 INFO L175 Difference]: Start difference. First operand has 378 places, 481 transitions, 7091 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:31:57,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 521 transitions, 8459 flow [2024-06-14 13:31:59,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 521 transitions, 8266 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-14 13:31:59,951 INFO L231 Difference]: Finished difference. Result has 379 places, 487 transitions, 7134 flow [2024-06-14 13:31:59,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6898, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7134, PETRI_PLACES=379, PETRI_TRANSITIONS=487} [2024-06-14 13:31:59,951 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-14 13:31:59,952 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 487 transitions, 7134 flow [2024-06-14 13:31:59,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:31:59,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:59,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:59,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:31:59,952 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)] === [2024-06-14 13:31:59,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:59,953 INFO L85 PathProgramCache]: Analyzing trace with hash -467064222, now seen corresponding path program 1 times [2024-06-14 13:31:59,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:59,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492592376] [2024-06-14 13:31:59,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:59,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:00,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:00,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492592376] [2024-06-14 13:32:00,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492592376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:00,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:00,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:00,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378488017] [2024-06-14 13:32:00,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:00,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:00,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:00,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:00,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:00,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:32:00,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 487 transitions, 7134 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:32:00,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:00,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:32:00,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:02,832 INFO L124 PetriNetUnfolderBase]: 5461/8490 cut-off events. [2024-06-14 13:32:02,832 INFO L125 PetriNetUnfolderBase]: For 819391/819403 co-relation queries the response was YES. [2024-06-14 13:32:02,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67685 conditions, 8490 events. 5461/8490 cut-off events. For 819391/819403 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 52097 event pairs, 1670 based on Foata normal form. 14/8504 useless extension candidates. Maximal degree in co-relation 67501. Up to 8295 conditions per place. [2024-06-14 13:32:02,976 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 477 selfloop transitions, 55 changer transitions 0/535 dead transitions. [2024-06-14 13:32:02,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 535 transitions, 8867 flow [2024-06-14 13:32:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:02,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:02,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:32:02,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-14 13:32:02,978 INFO L175 Difference]: Start difference. First operand has 379 places, 487 transitions, 7134 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:32:02,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 535 transitions, 8867 flow [2024-06-14 13:32:05,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 535 transitions, 8739 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:32:05,974 INFO L231 Difference]: Finished difference. Result has 385 places, 506 transitions, 7575 flow [2024-06-14 13:32:05,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7006, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7575, PETRI_PLACES=385, PETRI_TRANSITIONS=506} [2024-06-14 13:32:05,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-14 13:32:05,982 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 506 transitions, 7575 flow [2024-06-14 13:32:05,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:32:05,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:05,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:05,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:32:05,983 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)] === [2024-06-14 13:32:05,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:05,983 INFO L85 PathProgramCache]: Analyzing trace with hash 507084172, now seen corresponding path program 2 times [2024-06-14 13:32:05,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:05,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531075746] [2024-06-14 13:32:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:05,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:06,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:06,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531075746] [2024-06-14 13:32:06,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531075746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:06,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:06,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:06,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312666841] [2024-06-14 13:32:06,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:06,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:06,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:06,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:06,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:32:06,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 506 transitions, 7575 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:32:06,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:06,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:32:06,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:09,279 INFO L124 PetriNetUnfolderBase]: 5455/8481 cut-off events. [2024-06-14 13:32:09,279 INFO L125 PetriNetUnfolderBase]: For 831722/831726 co-relation queries the response was YES. [2024-06-14 13:32:09,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67859 conditions, 8481 events. 5455/8481 cut-off events. For 831722/831726 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 52029 event pairs, 1668 based on Foata normal form. 6/8487 useless extension candidates. Maximal degree in co-relation 67672. Up to 8332 conditions per place. [2024-06-14 13:32:09,413 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 481 selfloop transitions, 47 changer transitions 0/531 dead transitions. [2024-06-14 13:32:09,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 531 transitions, 8719 flow [2024-06-14 13:32:09,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:32:09,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:32:09,414 INFO L175 Difference]: Start difference. First operand has 385 places, 506 transitions, 7575 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:32:09,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 531 transitions, 8719 flow [2024-06-14 13:32:12,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 531 transitions, 8568 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-14 13:32:12,652 INFO L231 Difference]: Finished difference. Result has 391 places, 506 transitions, 7524 flow [2024-06-14 13:32:12,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7424, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7524, PETRI_PLACES=391, PETRI_TRANSITIONS=506} [2024-06-14 13:32:12,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-14 13:32:12,655 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 506 transitions, 7524 flow [2024-06-14 13:32:12,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:32:12,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:12,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:12,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:32:12,656 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)] === [2024-06-14 13:32:12,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:12,656 INFO L85 PathProgramCache]: Analyzing trace with hash 507084358, now seen corresponding path program 1 times [2024-06-14 13:32:12,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:12,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106716231] [2024-06-14 13:32:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:12,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:13,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:13,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106716231] [2024-06-14 13:32:13,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106716231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:13,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:13,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:13,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681872476] [2024-06-14 13:32:13,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:13,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:13,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:13,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:13,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:13,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:32:13,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 506 transitions, 7524 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:32:13,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:13,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:32:13,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:16,056 INFO L124 PetriNetUnfolderBase]: 5512/8560 cut-off events. [2024-06-14 13:32:16,057 INFO L125 PetriNetUnfolderBase]: For 873672/873676 co-relation queries the response was YES. [2024-06-14 13:32:16,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68943 conditions, 8560 events. 5512/8560 cut-off events. For 873672/873676 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 52397 event pairs, 1678 based on Foata normal form. 8/8568 useless extension candidates. Maximal degree in co-relation 68754. Up to 8306 conditions per place. [2024-06-14 13:32:16,198 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 479 selfloop transitions, 64 changer transitions 0/546 dead transitions. [2024-06-14 13:32:16,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 546 transitions, 9044 flow [2024-06-14 13:32:16,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:32:16,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:32:16,201 INFO L175 Difference]: Start difference. First operand has 391 places, 506 transitions, 7524 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:32:16,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 546 transitions, 9044 flow [2024-06-14 13:32:18,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 546 transitions, 8899 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 13:32:18,885 INFO L231 Difference]: Finished difference. Result has 396 places, 516 transitions, 7696 flow [2024-06-14 13:32:18,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7379, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7696, PETRI_PLACES=396, PETRI_TRANSITIONS=516} [2024-06-14 13:32:18,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-14 13:32:18,886 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 516 transitions, 7696 flow [2024-06-14 13:32:18,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:32:18,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:18,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:18,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:32:18,887 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)] === [2024-06-14 13:32:18,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:18,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1839134364, now seen corresponding path program 2 times [2024-06-14 13:32:18,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:18,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585142555] [2024-06-14 13:32:18,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:18,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:19,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:19,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585142555] [2024-06-14 13:32:19,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585142555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:19,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:19,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:19,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154483386] [2024-06-14 13:32:19,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:19,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:19,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:19,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:19,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:19,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:32:19,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 516 transitions, 7696 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:32:19,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:19,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:32:19,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:21,981 INFO L124 PetriNetUnfolderBase]: 5532/8588 cut-off events. [2024-06-14 13:32:21,981 INFO L125 PetriNetUnfolderBase]: For 894535/894539 co-relation queries the response was YES. [2024-06-14 13:32:22,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70088 conditions, 8588 events. 5532/8588 cut-off events. For 894535/894539 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 52607 event pairs, 1700 based on Foata normal form. 8/8596 useless extension candidates. Maximal degree in co-relation 69897. Up to 8390 conditions per place. [2024-06-14 13:32:22,169 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 486 selfloop transitions, 57 changer transitions 0/546 dead transitions. [2024-06-14 13:32:22,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 546 transitions, 8972 flow [2024-06-14 13:32:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:32:22,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:32:22,173 INFO L175 Difference]: Start difference. First operand has 396 places, 516 transitions, 7696 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:32:22,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 546 transitions, 8972 flow [2024-06-14 13:32:24,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 546 transitions, 8889 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-14 13:32:24,917 INFO L231 Difference]: Finished difference. Result has 403 places, 522 transitions, 7849 flow [2024-06-14 13:32:24,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7613, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7849, PETRI_PLACES=403, PETRI_TRANSITIONS=522} [2024-06-14 13:32:24,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-14 13:32:24,917 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 522 transitions, 7849 flow [2024-06-14 13:32:24,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:32:24,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:24,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:24,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:32:24,918 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)] === [2024-06-14 13:32:24,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1060148128, now seen corresponding path program 3 times [2024-06-14 13:32:24,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:24,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289914005] [2024-06-14 13:32:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:24,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:26,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:26,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289914005] [2024-06-14 13:32:26,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289914005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:26,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:26,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:26,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88895974] [2024-06-14 13:32:26,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:26,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:26,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:26,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:26,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:26,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:32:26,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 522 transitions, 7849 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:32:26,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:26,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:32:26,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:28,344 INFO L124 PetriNetUnfolderBase]: 5520/8572 cut-off events. [2024-06-14 13:32:28,344 INFO L125 PetriNetUnfolderBase]: For 895834/895838 co-relation queries the response was YES. [2024-06-14 13:32:28,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70303 conditions, 8572 events. 5520/8572 cut-off events. For 895834/895838 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 52506 event pairs, 1691 based on Foata normal form. 8/8580 useless extension candidates. Maximal degree in co-relation 70108. Up to 8368 conditions per place. [2024-06-14 13:32:28,547 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 484 selfloop transitions, 59 changer transitions 0/546 dead transitions. [2024-06-14 13:32:28,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 546 transitions, 9029 flow [2024-06-14 13:32:28,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:28,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:32:28,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:32:28,549 INFO L175 Difference]: Start difference. First operand has 403 places, 522 transitions, 7849 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:32:28,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 546 transitions, 9029 flow [2024-06-14 13:32:32,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 546 transitions, 8808 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-14 13:32:32,861 INFO L231 Difference]: Finished difference. Result has 406 places, 522 transitions, 7752 flow [2024-06-14 13:32:32,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7628, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7752, PETRI_PLACES=406, PETRI_TRANSITIONS=522} [2024-06-14 13:32:32,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-14 13:32:32,862 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 522 transitions, 7752 flow [2024-06-14 13:32:32,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:32:32,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:32,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:32,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:32:32,862 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)] === [2024-06-14 13:32:32,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:32,863 INFO L85 PathProgramCache]: Analyzing trace with hash 684215692, now seen corresponding path program 3 times [2024-06-14 13:32:32,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:32,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126561900] [2024-06-14 13:32:32,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:32,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:33,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:33,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126561900] [2024-06-14 13:32:33,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126561900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:33,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:33,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:33,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119305561] [2024-06-14 13:32:33,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:33,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:33,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:33,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:33,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:33,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:32:33,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 522 transitions, 7752 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:32:33,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:33,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:32:33,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:35,738 INFO L124 PetriNetUnfolderBase]: 5514/8564 cut-off events. [2024-06-14 13:32:35,738 INFO L125 PetriNetUnfolderBase]: For 894590/894594 co-relation queries the response was YES. [2024-06-14 13:32:35,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69945 conditions, 8564 events. 5514/8564 cut-off events. For 894590/894594 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 52498 event pairs, 1688 based on Foata normal form. 6/8570 useless extension candidates. Maximal degree in co-relation 69749. Up to 8441 conditions per place. [2024-06-14 13:32:35,893 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 498 selfloop transitions, 42 changer transitions 0/543 dead transitions. [2024-06-14 13:32:35,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 543 transitions, 8910 flow [2024-06-14 13:32:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-14 13:32:35,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-14 13:32:35,894 INFO L175 Difference]: Start difference. First operand has 406 places, 522 transitions, 7752 flow. Second operand 9 states and 138 transitions. [2024-06-14 13:32:35,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 543 transitions, 8910 flow [2024-06-14 13:32:38,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 543 transitions, 8721 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-14 13:32:38,943 INFO L231 Difference]: Finished difference. Result has 410 places, 522 transitions, 7653 flow [2024-06-14 13:32:38,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7563, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7653, PETRI_PLACES=410, PETRI_TRANSITIONS=522} [2024-06-14 13:32:38,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-14 13:32:38,944 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 522 transitions, 7653 flow [2024-06-14 13:32:38,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:32:38,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:38,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:38,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:32:38,945 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)] === [2024-06-14 13:32:38,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:38,945 INFO L85 PathProgramCache]: Analyzing trace with hash 684461956, now seen corresponding path program 1 times [2024-06-14 13:32:38,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:38,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352959573] [2024-06-14 13:32:38,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:38,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:40,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:40,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352959573] [2024-06-14 13:32:40,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352959573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:40,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:40,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:40,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619104924] [2024-06-14 13:32:40,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:40,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:40,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:40,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:32:40,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 522 transitions, 7653 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:32:40,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:40,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:32:40,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:42,563 INFO L124 PetriNetUnfolderBase]: 5557/8629 cut-off events. [2024-06-14 13:32:42,563 INFO L125 PetriNetUnfolderBase]: For 921513/921517 co-relation queries the response was YES. [2024-06-14 13:32:42,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70592 conditions, 8629 events. 5557/8629 cut-off events. For 921513/921517 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 52921 event pairs, 1695 based on Foata normal form. 8/8637 useless extension candidates. Maximal degree in co-relation 70395. Up to 8415 conditions per place. [2024-06-14 13:32:42,766 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 495 selfloop transitions, 66 changer transitions 0/564 dead transitions. [2024-06-14 13:32:42,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 564 transitions, 9192 flow [2024-06-14 13:32:42,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:32:42,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-14 13:32:42,767 INFO L175 Difference]: Start difference. First operand has 410 places, 522 transitions, 7653 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:32:42,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 564 transitions, 9192 flow [2024-06-14 13:32:45,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 564 transitions, 9080 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:32:45,940 INFO L231 Difference]: Finished difference. Result has 415 places, 540 transitions, 8057 flow [2024-06-14 13:32:45,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7551, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8057, PETRI_PLACES=415, PETRI_TRANSITIONS=540} [2024-06-14 13:32:45,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-14 13:32:45,941 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 540 transitions, 8057 flow [2024-06-14 13:32:45,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:32:45,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:45,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:45,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:32:45,942 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:32:45,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:45,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2076484763, now seen corresponding path program 8 times [2024-06-14 13:32:45,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:45,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412565501] [2024-06-14 13:32:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:45,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:47,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:47,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412565501] [2024-06-14 13:32:47,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412565501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:47,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:47,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:32:47,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317419862] [2024-06-14 13:32:47,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:47,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:32:47,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:47,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:32:47,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:32:47,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:32:47,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 540 transitions, 8057 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:47,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:47,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:32:47,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:50,005 INFO L124 PetriNetUnfolderBase]: 5598/8696 cut-off events. [2024-06-14 13:32:50,005 INFO L125 PetriNetUnfolderBase]: For 973158/973160 co-relation queries the response was YES. [2024-06-14 13:32:50,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71921 conditions, 8696 events. 5598/8696 cut-off events. For 973158/973160 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 53347 event pairs, 1290 based on Foata normal form. 14/8710 useless extension candidates. Maximal degree in co-relation 71720. Up to 7759 conditions per place. [2024-06-14 13:32:50,152 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 502 selfloop transitions, 77 changer transitions 0/582 dead transitions. [2024-06-14 13:32:50,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 582 transitions, 9445 flow [2024-06-14 13:32:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:32:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:32:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-14 13:32:50,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-14 13:32:50,153 INFO L175 Difference]: Start difference. First operand has 415 places, 540 transitions, 8057 flow. Second operand 10 states and 162 transitions. [2024-06-14 13:32:50,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 582 transitions, 9445 flow [2024-06-14 13:32:53,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 582 transitions, 9352 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-14 13:32:53,730 INFO L231 Difference]: Finished difference. Result has 423 places, 541 transitions, 8211 flow [2024-06-14 13:32:53,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7964, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8211, PETRI_PLACES=423, PETRI_TRANSITIONS=541} [2024-06-14 13:32:53,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-14 13:32:53,731 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 541 transitions, 8211 flow [2024-06-14 13:32:53,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:53,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:53,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:53,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:32:53,731 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:32:53,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:53,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1411015157, now seen corresponding path program 9 times [2024-06-14 13:32:53,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:53,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112237574] [2024-06-14 13:32:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:53,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:55,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:55,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112237574] [2024-06-14 13:32:55,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112237574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:55,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:55,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:32:55,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507545039] [2024-06-14 13:32:55,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:55,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:32:55,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:55,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:32:55,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:32:55,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:32:55,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 541 transitions, 8211 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 13:32:55,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:55,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:32:55,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:57,809 INFO L124 PetriNetUnfolderBase]: 5639/8779 cut-off events. [2024-06-14 13:32:57,810 INFO L125 PetriNetUnfolderBase]: For 1003700/1003702 co-relation queries the response was YES. [2024-06-14 13:32:57,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73116 conditions, 8779 events. 5639/8779 cut-off events. For 1003700/1003702 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 54304 event pairs, 1473 based on Foata normal form. 14/8793 useless extension candidates. Maximal degree in co-relation 72913. Up to 8125 conditions per place. [2024-06-14 13:32:57,966 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 516 selfloop transitions, 64 changer transitions 0/583 dead transitions. [2024-06-14 13:32:57,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 583 transitions, 9603 flow [2024-06-14 13:32:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:32:57,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:32:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 13:32:57,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-14 13:32:57,982 INFO L175 Difference]: Start difference. First operand has 423 places, 541 transitions, 8211 flow. Second operand 10 states and 164 transitions. [2024-06-14 13:32:57,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 583 transitions, 9603 flow [2024-06-14 13:33:01,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 583 transitions, 9376 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-14 13:33:01,526 INFO L231 Difference]: Finished difference. Result has 425 places, 542 transitions, 8202 flow [2024-06-14 13:33:01,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7988, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8202, PETRI_PLACES=425, PETRI_TRANSITIONS=542} [2024-06-14 13:33:01,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-14 13:33:01,526 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 542 transitions, 8202 flow [2024-06-14 13:33:01,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 13:33:01,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:01,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:01,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:33:01,527 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:33:01,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:01,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1165493113, now seen corresponding path program 10 times [2024-06-14 13:33:01,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:01,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891131677] [2024-06-14 13:33:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:01,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:03,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:03,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891131677] [2024-06-14 13:33:03,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891131677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:03,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:03,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:33:03,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123873287] [2024-06-14 13:33:03,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:03,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:33:03,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:03,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:33:03,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:33:03,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:33:03,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 542 transitions, 8202 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:03,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:03,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:33:03,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:05,550 INFO L124 PetriNetUnfolderBase]: 5680/8850 cut-off events. [2024-06-14 13:33:05,550 INFO L125 PetriNetUnfolderBase]: For 985165/985167 co-relation queries the response was YES. [2024-06-14 13:33:05,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73139 conditions, 8850 events. 5680/8850 cut-off events. For 985165/985167 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 54882 event pairs, 1425 based on Foata normal form. 14/8864 useless extension candidates. Maximal degree in co-relation 72935. Up to 8050 conditions per place. [2024-06-14 13:33:05,713 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 507 selfloop transitions, 74 changer transitions 0/584 dead transitions. [2024-06-14 13:33:05,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 584 transitions, 9594 flow [2024-06-14 13:33:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:33:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:33:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 13:33:05,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:33:05,715 INFO L175 Difference]: Start difference. First operand has 425 places, 542 transitions, 8202 flow. Second operand 10 states and 165 transitions. [2024-06-14 13:33:05,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 584 transitions, 9594 flow [2024-06-14 13:33:09,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 584 transitions, 9384 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-14 13:33:09,388 INFO L231 Difference]: Finished difference. Result has 427 places, 543 transitions, 8228 flow [2024-06-14 13:33:09,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7998, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8228, PETRI_PLACES=427, PETRI_TRANSITIONS=543} [2024-06-14 13:33:09,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-14 13:33:09,388 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 543 transitions, 8228 flow [2024-06-14 13:33:09,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:09,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:09,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:09,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:33:09,389 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:33:09,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:09,389 INFO L85 PathProgramCache]: Analyzing trace with hash 318994384, now seen corresponding path program 5 times [2024-06-14 13:33:09,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:09,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885477779] [2024-06-14 13:33:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:09,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:10,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:10,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885477779] [2024-06-14 13:33:10,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885477779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:10,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:10,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:33:10,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736074669] [2024-06-14 13:33:10,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:10,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:33:10,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:10,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:33:10,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:33:10,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:33:10,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 543 transitions, 8228 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:10,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:10,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:33:10,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:13,315 INFO L124 PetriNetUnfolderBase]: 5710/8888 cut-off events. [2024-06-14 13:33:13,315 INFO L125 PetriNetUnfolderBase]: For 951933/951935 co-relation queries the response was YES. [2024-06-14 13:33:13,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73004 conditions, 8888 events. 5710/8888 cut-off events. For 951933/951935 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 55053 event pairs, 1612 based on Foata normal form. 6/8894 useless extension candidates. Maximal degree in co-relation 72799. Up to 8421 conditions per place. [2024-06-14 13:33:13,476 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 471 selfloop transitions, 103 changer transitions 0/577 dead transitions. [2024-06-14 13:33:13,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 577 transitions, 9733 flow [2024-06-14 13:33:13,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:33:13,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:33:13,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:33:13,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 13:33:13,478 INFO L175 Difference]: Start difference. First operand has 427 places, 543 transitions, 8228 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:33:13,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 577 transitions, 9733 flow [2024-06-14 13:33:17,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 577 transitions, 9521 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-14 13:33:17,120 INFO L231 Difference]: Finished difference. Result has 428 places, 549 transitions, 8335 flow [2024-06-14 13:33:17,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8018, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8335, PETRI_PLACES=428, PETRI_TRANSITIONS=549} [2024-06-14 13:33:17,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-14 13:33:17,120 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 549 transitions, 8335 flow [2024-06-14 13:33:17,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:17,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:17,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:17,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:33:17,121 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:33:17,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:17,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1343251, now seen corresponding path program 11 times [2024-06-14 13:33:17,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:17,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094339306] [2024-06-14 13:33:17,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:17,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:19,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:19,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094339306] [2024-06-14 13:33:19,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094339306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:19,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:19,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 13:33:19,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893963204] [2024-06-14 13:33:19,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:19,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 13:33:19,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:19,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 13:33:19,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-14 13:33:19,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:33:19,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 549 transitions, 8335 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:19,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:19,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:33:19,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:21,827 INFO L124 PetriNetUnfolderBase]: 5751/8951 cut-off events. [2024-06-14 13:33:21,827 INFO L125 PetriNetUnfolderBase]: For 973425/973425 co-relation queries the response was YES. [2024-06-14 13:33:21,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73342 conditions, 8951 events. 5751/8951 cut-off events. For 973425/973425 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 55386 event pairs, 1149 based on Foata normal form. 12/8963 useless extension candidates. Maximal degree in co-relation 73135. Up to 7898 conditions per place. [2024-06-14 13:33:21,988 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 495 selfloop transitions, 103 changer transitions 0/601 dead transitions. [2024-06-14 13:33:21,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 601 transitions, 9823 flow [2024-06-14 13:33:21,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:33:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:33:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-14 13:33:21,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-14 13:33:21,990 INFO L175 Difference]: Start difference. First operand has 428 places, 549 transitions, 8335 flow. Second operand 11 states and 186 transitions. [2024-06-14 13:33:21,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 601 transitions, 9823 flow [2024-06-14 13:33:25,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 601 transitions, 9630 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:33:26,002 INFO L231 Difference]: Finished difference. Result has 433 places, 550 transitions, 8428 flow [2024-06-14 13:33:26,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8142, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8428, PETRI_PLACES=433, PETRI_TRANSITIONS=550} [2024-06-14 13:33:26,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-14 13:33:26,003 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 550 transitions, 8428 flow [2024-06-14 13:33:26,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:26,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:26,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:26,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:33:26,004 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:33:26,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:26,004 INFO L85 PathProgramCache]: Analyzing trace with hash -169359179, now seen corresponding path program 12 times [2024-06-14 13:33:26,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:26,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258764126] [2024-06-14 13:33:26,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:26,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:27,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:27,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258764126] [2024-06-14 13:33:27,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258764126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:27,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:27,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 13:33:27,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874949773] [2024-06-14 13:33:27,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:27,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 13:33:27,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:27,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 13:33:27,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-14 13:33:27,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:33:27,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 550 transitions, 8428 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:27,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:27,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:33:27,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:30,570 INFO L124 PetriNetUnfolderBase]: 5792/9022 cut-off events. [2024-06-14 13:33:30,571 INFO L125 PetriNetUnfolderBase]: For 965115/965115 co-relation queries the response was YES. [2024-06-14 13:33:30,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73959 conditions, 9022 events. 5792/9022 cut-off events. For 965115/965115 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 56018 event pairs, 1174 based on Foata normal form. 12/9034 useless extension candidates. Maximal degree in co-relation 73753. Up to 8255 conditions per place. [2024-06-14 13:33:30,707 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 498 selfloop transitions, 91 changer transitions 0/592 dead transitions. [2024-06-14 13:33:30,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 592 transitions, 9838 flow [2024-06-14 13:33:30,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:33:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:33:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:33:30,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-14 13:33:30,708 INFO L175 Difference]: Start difference. First operand has 433 places, 550 transitions, 8428 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:33:30,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 592 transitions, 9838 flow [2024-06-14 13:33:34,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 592 transitions, 9568 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-14 13:33:34,147 INFO L231 Difference]: Finished difference. Result has 434 places, 551 transitions, 8422 flow [2024-06-14 13:33:34,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8160, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8422, PETRI_PLACES=434, PETRI_TRANSITIONS=551} [2024-06-14 13:33:34,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-14 13:33:34,147 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 551 transitions, 8422 flow [2024-06-14 13:33:34,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:34,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:34,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:34,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:33:34,148 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:33:34,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:34,148 INFO L85 PathProgramCache]: Analyzing trace with hash -169474499, now seen corresponding path program 13 times [2024-06-14 13:33:34,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:34,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441926215] [2024-06-14 13:33:34,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:34,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:35,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:35,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441926215] [2024-06-14 13:33:35,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441926215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:35,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:35,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 13:33:35,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958908555] [2024-06-14 13:33:35,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:35,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 13:33:35,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:35,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 13:33:35,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-14 13:33:35,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:33:35,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 551 transitions, 8422 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:35,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:35,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:33:35,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:38,767 INFO L124 PetriNetUnfolderBase]: 5833/9093 cut-off events. [2024-06-14 13:33:38,767 INFO L125 PetriNetUnfolderBase]: For 965420/965420 co-relation queries the response was YES. [2024-06-14 13:33:38,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74150 conditions, 9093 events. 5833/9093 cut-off events. For 965420/965420 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 56633 event pairs, 1167 based on Foata normal form. 12/9105 useless extension candidates. Maximal degree in co-relation 73943. Up to 8208 conditions per place. [2024-06-14 13:33:38,930 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 489 selfloop transitions, 101 changer transitions 0/593 dead transitions. [2024-06-14 13:33:38,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 593 transitions, 9834 flow [2024-06-14 13:33:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:33:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:33:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:33:38,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-14 13:33:38,931 INFO L175 Difference]: Start difference. First operand has 434 places, 551 transitions, 8422 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:33:38,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 593 transitions, 9834 flow [2024-06-14 13:33:41,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 593 transitions, 9588 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-14 13:33:41,848 INFO L231 Difference]: Finished difference. Result has 436 places, 552 transitions, 8460 flow [2024-06-14 13:33:41,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8178, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8460, PETRI_PLACES=436, PETRI_TRANSITIONS=552} [2024-06-14 13:33:41,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-14 13:33:41,848 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 552 transitions, 8460 flow [2024-06-14 13:33:41,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:41,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:41,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:41,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:33:41,849 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:33:41,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:41,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1111948926, now seen corresponding path program 6 times [2024-06-14 13:33:41,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:41,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309858887] [2024-06-14 13:33:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:41,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:43,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:43,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309858887] [2024-06-14 13:33:43,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309858887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:43,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:43,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:43,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910349160] [2024-06-14 13:33:43,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:43,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:43,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:43,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:43,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:43,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:33:43,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 552 transitions, 8460 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:33:43,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:43,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:33:43,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:46,017 INFO L124 PetriNetUnfolderBase]: 5895/9179 cut-off events. [2024-06-14 13:33:46,018 INFO L125 PetriNetUnfolderBase]: For 952370/952370 co-relation queries the response was YES. [2024-06-14 13:33:46,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74727 conditions, 9179 events. 5895/9179 cut-off events. For 952370/952370 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 57082 event pairs, 1289 based on Foata normal form. 4/9183 useless extension candidates. Maximal degree in co-relation 74519. Up to 8680 conditions per place. [2024-06-14 13:33:46,188 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 471 selfloop transitions, 114 changer transitions 0/588 dead transitions. [2024-06-14 13:33:46,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 588 transitions, 10235 flow [2024-06-14 13:33:46,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:33:46,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:33:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:33:46,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 13:33:46,190 INFO L175 Difference]: Start difference. First operand has 436 places, 552 transitions, 8460 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:33:46,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 588 transitions, 10235 flow [2024-06-14 13:33:49,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 588 transitions, 9967 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-14 13:33:49,387 INFO L231 Difference]: Finished difference. Result has 437 places, 561 transitions, 8606 flow [2024-06-14 13:33:49,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8196, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8606, PETRI_PLACES=437, PETRI_TRANSITIONS=561} [2024-06-14 13:33:49,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-14 13:33:49,388 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 561 transitions, 8606 flow [2024-06-14 13:33:49,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:33:49,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:49,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:49,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:33:49,388 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:33:49,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:49,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1111937766, now seen corresponding path program 7 times [2024-06-14 13:33:49,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:49,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196992557] [2024-06-14 13:33:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:49,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:50,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:50,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196992557] [2024-06-14 13:33:50,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196992557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:50,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:50,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:50,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209566654] [2024-06-14 13:33:50,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:50,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:50,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:50,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:50,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:51,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:33:51,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 561 transitions, 8606 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:33:51,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:51,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:33:51,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:53,670 INFO L124 PetriNetUnfolderBase]: 5883/9163 cut-off events. [2024-06-14 13:33:53,670 INFO L125 PetriNetUnfolderBase]: For 927657/927657 co-relation queries the response was YES. [2024-06-14 13:33:53,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73921 conditions, 9163 events. 5883/9163 cut-off events. For 927657/927657 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 57022 event pairs, 1287 based on Foata normal form. 4/9167 useless extension candidates. Maximal degree in co-relation 73711. Up to 8672 conditions per place. [2024-06-14 13:33:53,833 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 477 selfloop transitions, 108 changer transitions 0/588 dead transitions. [2024-06-14 13:33:53,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 588 transitions, 10065 flow [2024-06-14 13:33:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:33:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:33:53,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:33:53,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 13:33:53,835 INFO L175 Difference]: Start difference. First operand has 437 places, 561 transitions, 8606 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:33:53,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 588 transitions, 10065 flow [2024-06-14 13:33:57,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 588 transitions, 9887 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 13:33:57,920 INFO L231 Difference]: Finished difference. Result has 441 places, 561 transitions, 8656 flow [2024-06-14 13:33:57,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8430, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8656, PETRI_PLACES=441, PETRI_TRANSITIONS=561} [2024-06-14 13:33:57,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-14 13:33:57,921 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 561 transitions, 8656 flow [2024-06-14 13:33:57,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:33:57,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:57,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:57,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:33:57,922 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:33:57,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:57,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1198674970, now seen corresponding path program 4 times [2024-06-14 13:33:57,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:57,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438398757] [2024-06-14 13:33:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:57,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:58,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:58,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438398757] [2024-06-14 13:33:58,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438398757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:58,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:58,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:33:58,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357604970] [2024-06-14 13:33:58,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:58,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:33:58,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:58,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:33:58,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:33:58,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:33:58,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 561 transitions, 8656 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:33:58,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:58,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:33:58,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:01,555 INFO L124 PetriNetUnfolderBase]: 5925/9225 cut-off events. [2024-06-14 13:34:01,555 INFO L125 PetriNetUnfolderBase]: For 941482/941486 co-relation queries the response was YES. [2024-06-14 13:34:01,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75020 conditions, 9225 events. 5925/9225 cut-off events. For 941482/941486 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 57475 event pairs, 1767 based on Foata normal form. 6/9231 useless extension candidates. Maximal degree in co-relation 74810. Up to 8940 conditions per place. [2024-06-14 13:34:01,698 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 514 selfloop transitions, 78 changer transitions 0/595 dead transitions. [2024-06-14 13:34:01,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 595 transitions, 10444 flow [2024-06-14 13:34:01,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:34:01,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 13:34:01,699 INFO L175 Difference]: Start difference. First operand has 441 places, 561 transitions, 8656 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:34:01,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 595 transitions, 10444 flow [2024-06-14 13:34:05,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 595 transitions, 10186 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:34:05,789 INFO L231 Difference]: Finished difference. Result has 442 places, 570 transitions, 8910 flow [2024-06-14 13:34:05,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8400, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8910, PETRI_PLACES=442, PETRI_TRANSITIONS=570} [2024-06-14 13:34:05,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-14 13:34:05,790 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 570 transitions, 8910 flow [2024-06-14 13:34:05,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:34:05,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:05,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:05,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:34:05,793 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:05,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:05,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1250446696, now seen corresponding path program 4 times [2024-06-14 13:34:05,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:05,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943504330] [2024-06-14 13:34:05,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:05,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:06,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:06,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943504330] [2024-06-14 13:34:06,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943504330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:06,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:06,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:06,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952558231] [2024-06-14 13:34:06,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:06,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:06,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:06,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:06,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:06,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:34:06,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 570 transitions, 8910 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:34:06,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:06,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:34:06,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:09,617 INFO L124 PetriNetUnfolderBase]: 5977/9298 cut-off events. [2024-06-14 13:34:09,617 INFO L125 PetriNetUnfolderBase]: For 972382/972394 co-relation queries the response was YES. [2024-06-14 13:34:09,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76279 conditions, 9298 events. 5977/9298 cut-off events. For 972382/972394 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 57936 event pairs, 1772 based on Foata normal form. 16/9314 useless extension candidates. Maximal degree in co-relation 76069. Up to 8957 conditions per place. [2024-06-14 13:34:09,781 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 507 selfloop transitions, 91 changer transitions 0/601 dead transitions. [2024-06-14 13:34:09,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 601 transitions, 10564 flow [2024-06-14 13:34:09,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:34:09,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-14 13:34:09,782 INFO L175 Difference]: Start difference. First operand has 442 places, 570 transitions, 8910 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:34:09,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 601 transitions, 10564 flow [2024-06-14 13:34:13,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 601 transitions, 10361 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-14 13:34:13,242 INFO L231 Difference]: Finished difference. Result has 445 places, 576 transitions, 9071 flow [2024-06-14 13:34:13,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8713, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9071, PETRI_PLACES=445, PETRI_TRANSITIONS=576} [2024-06-14 13:34:13,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-14 13:34:13,243 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 576 transitions, 9071 flow [2024-06-14 13:34:13,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:34:13,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:13,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:13,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:34:13,243 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:13,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:13,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1027977190, now seen corresponding path program 5 times [2024-06-14 13:34:13,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:13,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714280853] [2024-06-14 13:34:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:13,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:14,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:14,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714280853] [2024-06-14 13:34:14,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714280853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:14,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:14,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:14,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10427090] [2024-06-14 13:34:14,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:14,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:14,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:14,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:14,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:34:14,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 576 transitions, 9071 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:34:14,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:14,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:34:14,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:16,825 INFO L124 PetriNetUnfolderBase]: 6027/9369 cut-off events. [2024-06-14 13:34:16,825 INFO L125 PetriNetUnfolderBase]: For 955624/955628 co-relation queries the response was YES. [2024-06-14 13:34:16,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77040 conditions, 9369 events. 6027/9369 cut-off events. For 955624/955628 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 58422 event pairs, 1809 based on Foata normal form. 6/9375 useless extension candidates. Maximal degree in co-relation 76829. Up to 9165 conditions per place. [2024-06-14 13:34:16,991 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 544 selfloop transitions, 68 changer transitions 0/615 dead transitions. [2024-06-14 13:34:16,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 615 transitions, 10872 flow [2024-06-14 13:34:16,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 13:34:16,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-14 13:34:16,993 INFO L175 Difference]: Start difference. First operand has 445 places, 576 transitions, 9071 flow. Second operand 9 states and 137 transitions. [2024-06-14 13:34:16,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 615 transitions, 10872 flow [2024-06-14 13:34:20,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 615 transitions, 10693 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 13:34:20,898 INFO L231 Difference]: Finished difference. Result has 453 places, 595 transitions, 9559 flow [2024-06-14 13:34:20,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8904, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9559, PETRI_PLACES=453, PETRI_TRANSITIONS=595} [2024-06-14 13:34:20,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-14 13:34:20,899 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 595 transitions, 9559 flow [2024-06-14 13:34:20,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:34:20,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:20,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:20,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:34:20,900 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:20,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:20,900 INFO L85 PathProgramCache]: Analyzing trace with hash 644126414, now seen corresponding path program 5 times [2024-06-14 13:34:20,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:20,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541871131] [2024-06-14 13:34:20,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:20,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:21,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:21,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541871131] [2024-06-14 13:34:21,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541871131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:21,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:21,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:21,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145742223] [2024-06-14 13:34:21,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:21,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:21,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:21,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:21,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:22,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:34:22,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 595 transitions, 9559 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:34:22,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:22,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:34:22,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:24,748 INFO L124 PetriNetUnfolderBase]: 6047/9398 cut-off events. [2024-06-14 13:34:24,749 INFO L125 PetriNetUnfolderBase]: For 962036/962040 co-relation queries the response was YES. [2024-06-14 13:34:24,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77178 conditions, 9398 events. 6047/9398 cut-off events. For 962036/962040 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 58503 event pairs, 1808 based on Foata normal form. 8/9406 useless extension candidates. Maximal degree in co-relation 76963. Up to 9154 conditions per place. [2024-06-14 13:34:24,926 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 537 selfloop transitions, 80 changer transitions 0/620 dead transitions. [2024-06-14 13:34:24,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 620 transitions, 10975 flow [2024-06-14 13:34:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:34:24,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:34:24,928 INFO L175 Difference]: Start difference. First operand has 453 places, 595 transitions, 9559 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:34:24,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 620 transitions, 10975 flow [2024-06-14 13:34:28,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 620 transitions, 10813 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 13:34:28,150 INFO L231 Difference]: Finished difference. Result has 457 places, 600 transitions, 9679 flow [2024-06-14 13:34:28,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9397, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9679, PETRI_PLACES=457, PETRI_TRANSITIONS=600} [2024-06-14 13:34:28,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-14 13:34:28,151 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 600 transitions, 9679 flow [2024-06-14 13:34:28,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:34:28,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:28,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:28,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:34:28,152 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:28,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:28,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1205108710, now seen corresponding path program 6 times [2024-06-14 13:34:28,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:28,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756958101] [2024-06-14 13:34:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:28,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:28,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:28,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756958101] [2024-06-14 13:34:28,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756958101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:28,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:28,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:28,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576278203] [2024-06-14 13:34:28,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:28,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:28,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:28,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:28,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:29,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:34:29,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 600 transitions, 9679 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:34:29,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:29,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:34:29,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:31,608 INFO L124 PetriNetUnfolderBase]: 6067/9425 cut-off events. [2024-06-14 13:34:31,609 INFO L125 PetriNetUnfolderBase]: For 972475/972479 co-relation queries the response was YES. [2024-06-14 13:34:31,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77971 conditions, 9425 events. 6067/9425 cut-off events. For 972475/972479 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 58774 event pairs, 1818 based on Foata normal form. 6/9431 useless extension candidates. Maximal degree in co-relation 77754. Up to 9257 conditions per place. [2024-06-14 13:34:31,820 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 557 selfloop transitions, 63 changer transitions 0/623 dead transitions. [2024-06-14 13:34:31,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 623 transitions, 11152 flow [2024-06-14 13:34:31,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 13:34:31,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-14 13:34:31,822 INFO L175 Difference]: Start difference. First operand has 457 places, 600 transitions, 9679 flow. Second operand 8 states and 123 transitions. [2024-06-14 13:34:31,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 623 transitions, 11152 flow [2024-06-14 13:34:35,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 623 transitions, 11020 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-14 13:34:35,156 INFO L231 Difference]: Finished difference. Result has 464 places, 606 transitions, 9871 flow [2024-06-14 13:34:35,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9547, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9871, PETRI_PLACES=464, PETRI_TRANSITIONS=606} [2024-06-14 13:34:35,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-14 13:34:35,157 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 606 transitions, 9871 flow [2024-06-14 13:34:35,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:34:35,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:35,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:35,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:34:35,157 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:35,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:35,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1205108896, now seen corresponding path program 6 times [2024-06-14 13:34:35,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:35,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517969112] [2024-06-14 13:34:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:35,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:36,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:36,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517969112] [2024-06-14 13:34:36,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517969112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:36,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:36,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:36,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950742431] [2024-06-14 13:34:36,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:36,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:36,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:36,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:36,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:36,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:34:36,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 606 transitions, 9871 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:34:36,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:36,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:34:36,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:38,983 INFO L124 PetriNetUnfolderBase]: 6107/9482 cut-off events. [2024-06-14 13:34:38,984 INFO L125 PetriNetUnfolderBase]: For 1002231/1002235 co-relation queries the response was YES. [2024-06-14 13:34:39,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78441 conditions, 9482 events. 6107/9482 cut-off events. For 1002231/1002235 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 59053 event pairs, 1809 based on Foata normal form. 8/9490 useless extension candidates. Maximal degree in co-relation 78221. Up to 9188 conditions per place. [2024-06-14 13:34:39,153 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 542 selfloop transitions, 98 changer transitions 0/643 dead transitions. [2024-06-14 13:34:39,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 643 transitions, 11434 flow [2024-06-14 13:34:39,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:34:39,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:34:39,155 INFO L175 Difference]: Start difference. First operand has 464 places, 606 transitions, 9871 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:34:39,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 643 transitions, 11434 flow [2024-06-14 13:34:42,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 643 transitions, 11245 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-14 13:34:42,869 INFO L231 Difference]: Finished difference. Result has 470 places, 623 transitions, 10173 flow [2024-06-14 13:34:42,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9682, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10173, PETRI_PLACES=470, PETRI_TRANSITIONS=623} [2024-06-14 13:34:42,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-14 13:34:42,869 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 623 transitions, 10173 flow [2024-06-14 13:34:42,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:34:42,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:42,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:42,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:34:42,870 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:42,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:42,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1726551880, now seen corresponding path program 2 times [2024-06-14 13:34:42,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:42,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165699765] [2024-06-14 13:34:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:42,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:44,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:44,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165699765] [2024-06-14 13:34:44,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165699765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:44,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:44,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:44,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523789724] [2024-06-14 13:34:44,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:44,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:44,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:44,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:44,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:34:44,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 623 transitions, 10173 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:34:44,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:44,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:34:44,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:47,173 INFO L124 PetriNetUnfolderBase]: 6123/9503 cut-off events. [2024-06-14 13:34:47,173 INFO L125 PetriNetUnfolderBase]: For 1003907/1003909 co-relation queries the response was YES. [2024-06-14 13:34:47,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79259 conditions, 9503 events. 6123/9503 cut-off events. For 1003907/1003909 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59244 event pairs, 1926 based on Foata normal form. 6/9509 useless extension candidates. Maximal degree in co-relation 79036. Up to 9260 conditions per place. [2024-06-14 13:34:47,348 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 567 selfloop transitions, 75 changer transitions 0/645 dead transitions. [2024-06-14 13:34:47,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 645 transitions, 11593 flow [2024-06-14 13:34:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:47,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:34:47,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-14 13:34:47,350 INFO L175 Difference]: Start difference. First operand has 470 places, 623 transitions, 10173 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:34:47,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 645 transitions, 11593 flow [2024-06-14 13:34:50,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 645 transitions, 11458 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 13:34:50,369 INFO L231 Difference]: Finished difference. Result has 475 places, 625 transitions, 10253 flow [2024-06-14 13:34:50,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10038, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10253, PETRI_PLACES=475, PETRI_TRANSITIONS=625} [2024-06-14 13:34:50,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-14 13:34:50,370 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 625 transitions, 10253 flow [2024-06-14 13:34:50,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:34:50,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:50,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:50,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:34:50,370 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:50,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:50,371 INFO L85 PathProgramCache]: Analyzing trace with hash 221372615, now seen corresponding path program 14 times [2024-06-14 13:34:50,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:50,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419646105] [2024-06-14 13:34:50,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:50,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:52,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:52,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419646105] [2024-06-14 13:34:52,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419646105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:52,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:52,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:34:52,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248265554] [2024-06-14 13:34:52,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:52,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:34:52,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:52,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:34:52,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:34:52,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:34:52,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 625 transitions, 10253 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:52,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:52,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:34:52,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:55,168 INFO L124 PetriNetUnfolderBase]: 6164/9577 cut-off events. [2024-06-14 13:34:55,168 INFO L125 PetriNetUnfolderBase]: For 1037617/1037619 co-relation queries the response was YES. [2024-06-14 13:34:55,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79853 conditions, 9577 events. 6164/9577 cut-off events. For 1037617/1037619 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 59779 event pairs, 1214 based on Foata normal form. 14/9591 useless extension candidates. Maximal degree in co-relation 79629. Up to 8326 conditions per place. [2024-06-14 13:34:55,355 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 527 selfloop transitions, 138 changer transitions 0/668 dead transitions. [2024-06-14 13:34:55,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 668 transitions, 11829 flow [2024-06-14 13:34:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:34:55,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:34:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 13:34:55,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-14 13:34:55,356 INFO L175 Difference]: Start difference. First operand has 475 places, 625 transitions, 10253 flow. Second operand 10 states and 173 transitions. [2024-06-14 13:34:55,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 668 transitions, 11829 flow [2024-06-14 13:34:58,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 668 transitions, 11646 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:34:58,774 INFO L231 Difference]: Finished difference. Result has 479 places, 626 transitions, 10424 flow [2024-06-14 13:34:58,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10070, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10424, PETRI_PLACES=479, PETRI_TRANSITIONS=626} [2024-06-14 13:34:58,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-14 13:34:58,775 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 626 transitions, 10424 flow [2024-06-14 13:34:58,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:58,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:58,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:58,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:34:58,776 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:58,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:58,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2053317444, now seen corresponding path program 7 times [2024-06-14 13:34:58,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:58,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597538821] [2024-06-14 13:34:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:58,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:59,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:59,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597538821] [2024-06-14 13:34:59,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597538821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:59,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:59,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:59,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254030736] [2024-06-14 13:34:59,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:59,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:59,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:59,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:59,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:59,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:34:59,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 626 transitions, 10424 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:34:59,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:59,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:34:59,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:02,357 INFO L124 PetriNetUnfolderBase]: 6238/9681 cut-off events. [2024-06-14 13:35:02,357 INFO L125 PetriNetUnfolderBase]: For 1068874/1068878 co-relation queries the response was YES. [2024-06-14 13:35:02,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82650 conditions, 9681 events. 6238/9681 cut-off events. For 1068874/1068878 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 60602 event pairs, 1820 based on Foata normal form. 6/9687 useless extension candidates. Maximal degree in co-relation 82425. Up to 8883 conditions per place. [2024-06-14 13:35:02,536 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 537 selfloop transitions, 141 changer transitions 0/681 dead transitions. [2024-06-14 13:35:02,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 681 transitions, 13204 flow [2024-06-14 13:35:02,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:35:02,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 13:35:02,537 INFO L175 Difference]: Start difference. First operand has 479 places, 626 transitions, 10424 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:35:02,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 681 transitions, 13204 flow [2024-06-14 13:35:05,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 681 transitions, 12868 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-14 13:35:05,824 INFO L231 Difference]: Finished difference. Result has 480 places, 653 transitions, 11209 flow [2024-06-14 13:35:05,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10088, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11209, PETRI_PLACES=480, PETRI_TRANSITIONS=653} [2024-06-14 13:35:05,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-14 13:35:05,825 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 653 transitions, 11209 flow [2024-06-14 13:35:05,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:35:05,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:05,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:05,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:35:05,825 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:05,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:05,826 INFO L85 PathProgramCache]: Analyzing trace with hash 50670185, now seen corresponding path program 15 times [2024-06-14 13:35:05,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:05,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776620966] [2024-06-14 13:35:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:05,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:07,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:07,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776620966] [2024-06-14 13:35:07,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776620966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:07,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:07,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 13:35:07,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736613984] [2024-06-14 13:35:07,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:07,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 13:35:07,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:07,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 13:35:07,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-14 13:35:07,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:35:07,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 653 transitions, 11209 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:07,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:07,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:35:07,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:11,030 INFO L124 PetriNetUnfolderBase]: 6279/9750 cut-off events. [2024-06-14 13:35:11,030 INFO L125 PetriNetUnfolderBase]: For 1129629/1129631 co-relation queries the response was YES. [2024-06-14 13:35:11,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83938 conditions, 9750 events. 6279/9750 cut-off events. For 1129629/1129631 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 60888 event pairs, 1246 based on Foata normal form. 14/9764 useless extension candidates. Maximal degree in co-relation 83711. Up to 8697 conditions per place. [2024-06-14 13:35:11,225 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 592 selfloop transitions, 113 changer transitions 0/708 dead transitions. [2024-06-14 13:35:11,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 708 transitions, 12929 flow [2024-06-14 13:35:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:35:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:35:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-14 13:35:11,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-14 13:35:11,226 INFO L175 Difference]: Start difference. First operand has 480 places, 653 transitions, 11209 flow. Second operand 12 states and 202 transitions. [2024-06-14 13:35:11,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 708 transitions, 12929 flow [2024-06-14 13:35:15,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 708 transitions, 12725 flow, removed 84 selfloop flow, removed 2 redundant places. [2024-06-14 13:35:15,264 INFO L231 Difference]: Finished difference. Result has 490 places, 654 transitions, 11311 flow [2024-06-14 13:35:15,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11005, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11311, PETRI_PLACES=490, PETRI_TRANSITIONS=654} [2024-06-14 13:35:15,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 447 predicate places. [2024-06-14 13:35:15,265 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 654 transitions, 11311 flow [2024-06-14 13:35:15,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:15,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:15,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:15,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:35:15,265 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:15,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:15,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1979974632, now seen corresponding path program 7 times [2024-06-14 13:35:15,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:15,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338736050] [2024-06-14 13:35:15,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:15,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:16,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:16,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338736050] [2024-06-14 13:35:16,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338736050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:16,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:16,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:16,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42212820] [2024-06-14 13:35:16,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:16,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:16,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:16,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:16,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:16,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:35:16,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 654 transitions, 11311 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:35:16,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:16,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:35:16,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:19,480 INFO L124 PetriNetUnfolderBase]: 6341/9838 cut-off events. [2024-06-14 13:35:19,480 INFO L125 PetriNetUnfolderBase]: For 1145957/1145961 co-relation queries the response was YES. [2024-06-14 13:35:19,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85693 conditions, 9838 events. 6341/9838 cut-off events. For 1145957/1145961 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 61668 event pairs, 1838 based on Foata normal form. 8/9846 useless extension candidates. Maximal degree in co-relation 85464. Up to 9174 conditions per place. [2024-06-14 13:35:19,678 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 544 selfloop transitions, 145 changer transitions 0/692 dead transitions. [2024-06-14 13:35:19,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 692 transitions, 13515 flow [2024-06-14 13:35:19,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:35:19,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-14 13:35:19,679 INFO L175 Difference]: Start difference. First operand has 490 places, 654 transitions, 11311 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:35:19,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 692 transitions, 13515 flow [2024-06-14 13:35:24,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 692 transitions, 13227 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-14 13:35:24,147 INFO L231 Difference]: Finished difference. Result has 489 places, 666 transitions, 11631 flow [2024-06-14 13:35:24,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11023, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11631, PETRI_PLACES=489, PETRI_TRANSITIONS=666} [2024-06-14 13:35:24,148 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-14 13:35:24,148 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 666 transitions, 11631 flow [2024-06-14 13:35:24,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:35:24,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:24,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:24,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:35:24,149 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:24,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:24,149 INFO L85 PathProgramCache]: Analyzing trace with hash 225405797, now seen corresponding path program 16 times [2024-06-14 13:35:24,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:24,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351903577] [2024-06-14 13:35:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:24,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:26,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:26,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351903577] [2024-06-14 13:35:26,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351903577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:26,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:26,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 13:35:26,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379663049] [2024-06-14 13:35:26,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:26,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 13:35:26,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 13:35:26,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-14 13:35:26,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:35:26,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 666 transitions, 11631 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:26,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:26,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:35:26,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:30,088 INFO L124 PetriNetUnfolderBase]: 6382/9907 cut-off events. [2024-06-14 13:35:30,089 INFO L125 PetriNetUnfolderBase]: For 1196552/1196554 co-relation queries the response was YES. [2024-06-14 13:35:30,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86396 conditions, 9907 events. 6382/9907 cut-off events. For 1196552/1196554 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 62058 event pairs, 1252 based on Foata normal form. 14/9921 useless extension candidates. Maximal degree in co-relation 86165. Up to 8966 conditions per place. [2024-06-14 13:35:30,261 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 594 selfloop transitions, 110 changer transitions 0/707 dead transitions. [2024-06-14 13:35:30,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 707 transitions, 13279 flow [2024-06-14 13:35:30,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:35:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:35:30,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 13:35:30,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:35:30,262 INFO L175 Difference]: Start difference. First operand has 489 places, 666 transitions, 11631 flow. Second operand 10 states and 168 transitions. [2024-06-14 13:35:30,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 707 transitions, 13279 flow [2024-06-14 13:35:34,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 707 transitions, 13114 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-14 13:35:34,279 INFO L231 Difference]: Finished difference. Result has 497 places, 667 transitions, 11768 flow [2024-06-14 13:35:34,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11466, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11768, PETRI_PLACES=497, PETRI_TRANSITIONS=667} [2024-06-14 13:35:34,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-14 13:35:34,281 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 667 transitions, 11768 flow [2024-06-14 13:35:34,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:34,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:34,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:34,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:35:34,281 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:34,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:34,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2060467284, now seen corresponding path program 8 times [2024-06-14 13:35:34,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:34,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636350824] [2024-06-14 13:35:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:34,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:35,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:35,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636350824] [2024-06-14 13:35:35,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636350824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:35,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:35,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:35,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312755352] [2024-06-14 13:35:35,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:35,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:35,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:35,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:35,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:35,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:35:35,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 667 transitions, 11768 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:35:35,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:35,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:35:35,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:38,868 INFO L124 PetriNetUnfolderBase]: 6402/9937 cut-off events. [2024-06-14 13:35:38,868 INFO L125 PetriNetUnfolderBase]: For 1193765/1193769 co-relation queries the response was YES. [2024-06-14 13:35:39,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87276 conditions, 9937 events. 6402/9937 cut-off events. For 1193765/1193769 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 62561 event pairs, 1809 based on Foata normal form. 8/9945 useless extension candidates. Maximal degree in co-relation 87043. Up to 9119 conditions per place. [2024-06-14 13:35:39,076 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 536 selfloop transitions, 159 changer transitions 0/698 dead transitions. [2024-06-14 13:35:39,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 698 transitions, 13810 flow [2024-06-14 13:35:39,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:35:39,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 13:35:39,092 INFO L175 Difference]: Start difference. First operand has 497 places, 667 transitions, 11768 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:35:39,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 698 transitions, 13810 flow [2024-06-14 13:35:42,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 698 transitions, 13498 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-14 13:35:42,973 INFO L231 Difference]: Finished difference. Result has 496 places, 671 transitions, 11897 flow [2024-06-14 13:35:42,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11456, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11897, PETRI_PLACES=496, PETRI_TRANSITIONS=671} [2024-06-14 13:35:42,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-14 13:35:42,974 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 671 transitions, 11897 flow [2024-06-14 13:35:42,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:35:42,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:42,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:42,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:35:42,975 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:42,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:42,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1696566441, now seen corresponding path program 17 times [2024-06-14 13:35:42,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:42,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236445374] [2024-06-14 13:35:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:42,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:44,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:44,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236445374] [2024-06-14 13:35:44,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236445374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:44,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:44,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:35:44,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352139798] [2024-06-14 13:35:44,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:44,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:35:44,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:44,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:35:44,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:35:44,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:35:44,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 671 transitions, 11897 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:44,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:44,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:35:44,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:48,730 INFO L124 PetriNetUnfolderBase]: 6382/9903 cut-off events. [2024-06-14 13:35:48,730 INFO L125 PetriNetUnfolderBase]: For 1185178/1185180 co-relation queries the response was YES. [2024-06-14 13:35:48,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85685 conditions, 9903 events. 6382/9903 cut-off events. For 1185178/1185180 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 61954 event pairs, 1212 based on Foata normal form. 14/9917 useless extension candidates. Maximal degree in co-relation 85452. Up to 8532 conditions per place. [2024-06-14 13:35:48,914 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 564 selfloop transitions, 148 changer transitions 0/715 dead transitions. [2024-06-14 13:35:48,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 715 transitions, 13381 flow [2024-06-14 13:35:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:35:48,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:35:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 13:35:48,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-14 13:35:48,917 INFO L175 Difference]: Start difference. First operand has 496 places, 671 transitions, 11897 flow. Second operand 10 states and 174 transitions. [2024-06-14 13:35:48,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 715 transitions, 13381 flow [2024-06-14 13:35:53,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 715 transitions, 12998 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-14 13:35:53,061 INFO L231 Difference]: Finished difference. Result has 500 places, 670 transitions, 11662 flow [2024-06-14 13:35:53,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11362, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11662, PETRI_PLACES=500, PETRI_TRANSITIONS=670} [2024-06-14 13:35:53,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 457 predicate places. [2024-06-14 13:35:53,062 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 670 transitions, 11662 flow [2024-06-14 13:35:53,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:53,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:53,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:53,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:35:53,063 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:53,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:53,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1984791292, now seen corresponding path program 9 times [2024-06-14 13:35:53,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:53,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784294511] [2024-06-14 13:35:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:53,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:53,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:53,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784294511] [2024-06-14 13:35:53,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784294511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:53,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:53,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:53,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678455186] [2024-06-14 13:35:53,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:53,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:53,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:53,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:53,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:53,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:35:53,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 670 transitions, 11662 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:35:53,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:53,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:35:53,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:57,387 INFO L124 PetriNetUnfolderBase]: 6426/9966 cut-off events. [2024-06-14 13:35:57,387 INFO L125 PetriNetUnfolderBase]: For 1176520/1176524 co-relation queries the response was YES. [2024-06-14 13:35:57,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86507 conditions, 9966 events. 6426/9966 cut-off events. For 1176520/1176524 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 62676 event pairs, 1805 based on Foata normal form. 8/9974 useless extension candidates. Maximal degree in co-relation 86273. Up to 9124 conditions per place. [2024-06-14 13:35:57,639 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 534 selfloop transitions, 165 changer transitions 0/702 dead transitions. [2024-06-14 13:35:57,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 702 transitions, 13831 flow [2024-06-14 13:35:57,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:57,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 13:35:57,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 13:35:57,641 INFO L175 Difference]: Start difference. First operand has 500 places, 670 transitions, 11662 flow. Second operand 8 states and 134 transitions. [2024-06-14 13:35:57,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 702 transitions, 13831 flow [2024-06-14 13:36:03,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 702 transitions, 13270 flow, removed 37 selfloop flow, removed 11 redundant places. [2024-06-14 13:36:03,131 INFO L231 Difference]: Finished difference. Result has 497 places, 677 transitions, 11635 flow [2024-06-14 13:36:03,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11101, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11635, PETRI_PLACES=497, PETRI_TRANSITIONS=677} [2024-06-14 13:36:03,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-14 13:36:03,132 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 677 transitions, 11635 flow [2024-06-14 13:36:03,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:36:03,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:03,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:03,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:36:03,133 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:03,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2053437414, now seen corresponding path program 10 times [2024-06-14 13:36:03,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:03,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145866820] [2024-06-14 13:36:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:03,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:03,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:03,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145866820] [2024-06-14 13:36:03,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145866820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:03,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:03,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:03,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634164273] [2024-06-14 13:36:03,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:03,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:03,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:03,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:03,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:04,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:36:04,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 677 transitions, 11635 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:36:04,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:04,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:36:04,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:07,762 INFO L124 PetriNetUnfolderBase]: 6436/9980 cut-off events. [2024-06-14 13:36:07,762 INFO L125 PetriNetUnfolderBase]: For 1177912/1177916 co-relation queries the response was YES. [2024-06-14 13:36:07,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85010 conditions, 9980 events. 6436/9980 cut-off events. For 1177912/1177916 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 62734 event pairs, 1820 based on Foata normal form. 6/9986 useless extension candidates. Maximal degree in co-relation 84778. Up to 9655 conditions per place. [2024-06-14 13:36:07,929 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 602 selfloop transitions, 95 changer transitions 0/700 dead transitions. [2024-06-14 13:36:07,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 700 transitions, 13220 flow [2024-06-14 13:36:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:07,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:07,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:36:07,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 13:36:07,931 INFO L175 Difference]: Start difference. First operand has 497 places, 677 transitions, 11635 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:36:07,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 700 transitions, 13220 flow [2024-06-14 13:36:12,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 700 transitions, 12890 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-14 13:36:12,641 INFO L231 Difference]: Finished difference. Result has 501 places, 680 transitions, 11600 flow [2024-06-14 13:36:12,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11307, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11600, PETRI_PLACES=501, PETRI_TRANSITIONS=680} [2024-06-14 13:36:12,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-14 13:36:12,641 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 680 transitions, 11600 flow [2024-06-14 13:36:12,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:36:12,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:12,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:12,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:36:12,642 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:12,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:12,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1857744922, now seen corresponding path program 11 times [2024-06-14 13:36:12,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:12,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873983181] [2024-06-14 13:36:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:12,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:13,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:13,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873983181] [2024-06-14 13:36:13,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873983181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:13,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:13,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:13,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772012930] [2024-06-14 13:36:13,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:13,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:13,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:13,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:13,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:13,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:36:13,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 680 transitions, 11600 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:36:13,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:13,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:36:13,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:16,917 INFO L124 PetriNetUnfolderBase]: 6446/9994 cut-off events. [2024-06-14 13:36:16,917 INFO L125 PetriNetUnfolderBase]: For 1156557/1156561 co-relation queries the response was YES. [2024-06-14 13:36:17,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84467 conditions, 9994 events. 6446/9994 cut-off events. For 1156557/1156561 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 62816 event pairs, 1823 based on Foata normal form. 6/10000 useless extension candidates. Maximal degree in co-relation 84234. Up to 9575 conditions per place. [2024-06-14 13:36:17,100 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 581 selfloop transitions, 122 changer transitions 0/706 dead transitions. [2024-06-14 13:36:17,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 706 transitions, 13593 flow [2024-06-14 13:36:17,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:36:17,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:36:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-14 13:36:17,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-14 13:36:17,101 INFO L175 Difference]: Start difference. First operand has 501 places, 680 transitions, 11600 flow. Second operand 10 states and 153 transitions. [2024-06-14 13:36:17,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 706 transitions, 13593 flow [2024-06-14 13:36:21,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 706 transitions, 13335 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 13:36:21,736 INFO L231 Difference]: Finished difference. Result has 505 places, 683 transitions, 11677 flow [2024-06-14 13:36:21,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11342, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11677, PETRI_PLACES=505, PETRI_TRANSITIONS=683} [2024-06-14 13:36:21,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-14 13:36:21,748 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 683 transitions, 11677 flow [2024-06-14 13:36:21,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:36:21,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:21,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:21,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:36:21,749 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:21,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1857299266, now seen corresponding path program 8 times [2024-06-14 13:36:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:21,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927715174] [2024-06-14 13:36:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:21,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:22,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:22,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927715174] [2024-06-14 13:36:22,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927715174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:22,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:22,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:22,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168492407] [2024-06-14 13:36:22,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:22,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:22,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:22,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:22,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:22,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:36:22,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 683 transitions, 11677 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:36:22,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:22,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:36:22,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:26,466 INFO L124 PetriNetUnfolderBase]: 6471/10037 cut-off events. [2024-06-14 13:36:26,466 INFO L125 PetriNetUnfolderBase]: For 1190593/1190593 co-relation queries the response was YES. [2024-06-14 13:36:26,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85031 conditions, 10037 events. 6471/10037 cut-off events. For 1190593/1190593 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 63145 event pairs, 2653 based on Foata normal form. 4/10041 useless extension candidates. Maximal degree in co-relation 84797. Up to 9930 conditions per place. [2024-06-14 13:36:26,634 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 675 selfloop transitions, 31 changer transitions 0/709 dead transitions. [2024-06-14 13:36:26,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 709 transitions, 13322 flow [2024-06-14 13:36:26,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:26,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:26,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-14 13:36:26,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-14 13:36:26,636 INFO L175 Difference]: Start difference. First operand has 505 places, 683 transitions, 11677 flow. Second operand 9 states and 130 transitions. [2024-06-14 13:36:26,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 709 transitions, 13322 flow [2024-06-14 13:36:30,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 709 transitions, 13041 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 13:36:30,501 INFO L231 Difference]: Finished difference. Result has 511 places, 692 transitions, 11659 flow [2024-06-14 13:36:30,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11396, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11659, PETRI_PLACES=511, PETRI_TRANSITIONS=692} [2024-06-14 13:36:30,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 468 predicate places. [2024-06-14 13:36:30,516 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 692 transitions, 11659 flow [2024-06-14 13:36:30,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:36:30,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:30,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:30,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:36:30,517 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:30,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:30,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1857478012, now seen corresponding path program 12 times [2024-06-14 13:36:30,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:30,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712427918] [2024-06-14 13:36:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:30,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:31,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:31,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712427918] [2024-06-14 13:36:31,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712427918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:31,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:31,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:31,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34204846] [2024-06-14 13:36:31,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:31,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:31,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:31,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:31,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:31,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 13:36:31,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 692 transitions, 11659 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 13:36:31,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:31,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 13:36:31,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand