./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_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/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe003_power.oepc_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-76401ed-m [2024-06-20 16:48:39,482 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:48:39,536 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:48:39,541 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:48:39,541 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:48:39,567 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:48:39,567 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:48:39,567 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:48:39,568 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:48:39,571 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:48:39,571 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:48:39,571 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:48:39,572 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:48:39,573 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:48:39,573 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:48:39,573 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:48:39,574 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:48:39,574 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:48:39,574 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:48:39,574 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:48:39,575 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:48:39,576 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:48:39,576 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:48:39,576 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:48:39,576 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:48:39,577 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:48:39,577 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:48:39,577 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:48:39,577 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:48:39,578 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:48:39,578 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:48:39,579 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:48:39,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:48:39,579 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:48:39,579 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:48:39,579 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:48:39,580 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:48:39,580 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:48:39,580 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:48:39,580 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:48:39,580 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:48:39,581 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:48:39,581 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:48:39,581 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:48:39,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:48:39,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:48:39,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:48:39,819 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:48:39,819 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:48:39,820 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-20 16:48:39,980 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:48:39,980 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:48:39,980 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-20 16:48:40,919 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:48:41,181 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:48:41,182 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-20 16:48:41,200 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fe22ec7e/767e341a6d4047c0b8790c9b333ede52/FLAGfa33ba60a [2024-06-20 16:48:41,212 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fe22ec7e/767e341a6d4047c0b8790c9b333ede52 [2024-06-20 16:48:41,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:48:41,213 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:48:41,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:48:41,214 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:48:41,217 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:48:41,218 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:48:39" (1/2) ... [2024-06-20 16:48:41,219 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b07a50e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:41, skipping insertion in model container [2024-06-20 16:48:41,219 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:48:39" (1/2) ... [2024-06-20 16:48:41,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6dad001e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:48:41, skipping insertion in model container [2024-06-20 16:48:41,220 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:48:41" (2/2) ... [2024-06-20 16:48:41,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b07a50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:41, skipping insertion in model container [2024-06-20 16:48:41,220 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:48:41" (2/2) ... [2024-06-20 16:48:41,221 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:48:41,292 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:48:41,293 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! 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 || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! 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 || (((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$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-20 16:48:41,293 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! 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)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-20 16:48:41,293 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! 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 || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! 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 || (((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$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-20 16:48:41,293 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:48:41,294 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-20 16:48:41,334 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:48:41,695 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:48:41,710 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:48:41,816 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:48:41,863 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:48:41,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:41 WrapperNode [2024-06-20 16:48:41,864 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:48:41,865 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:48:41,865 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:48:41,865 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:48:41,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:41" (1/1) ... [2024-06-20 16:48:41,883 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:41" (1/1) ... [2024-06-20 16:48:41,910 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-20 16:48:41,910 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:48:41,911 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:48:41,911 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:48:41,911 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:48:41,920 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:41" (1/1) ... [2024-06-20 16:48:41,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:41" (1/1) ... [2024-06-20 16:48:41,923 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:41" (1/1) ... [2024-06-20 16:48:41,936 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]. [2024-06-20 16:48:41,937 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:41" (1/1) ... [2024-06-20 16:48:41,938 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:41" (1/1) ... [2024-06-20 16:48:41,946 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:41" (1/1) ... [2024-06-20 16:48:41,947 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:41" (1/1) ... [2024-06-20 16:48:41,949 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:41" (1/1) ... [2024-06-20 16:48:41,952 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:41" (1/1) ... [2024-06-20 16:48:41,959 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:48:41,960 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:48:41,960 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:48:41,960 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:48:41,964 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:41" (1/1) ... [2024-06-20 16:48:41,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:48:41,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:48:41,984 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) [2024-06-20 16:48:41,999 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 [2024-06-20 16:48:42,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:48:42,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:48:42,012 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:48:42,012 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:48:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:48:42,013 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:48:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:48:42,013 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:48:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:48:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:48:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:48:42,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:48:42,016 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:48:42,142 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:48:42,143 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:48:42,487 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:48:42,488 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:48:42,673 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:48:42,673 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:48:42,674 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:48:42 BoogieIcfgContainer [2024-06-20 16:48:42,674 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:48:42,676 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:48:42,676 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:48:42,678 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:48:42,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:48:39" (1/4) ... [2024-06-20 16:48:42,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1890c1c2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:48:42, skipping insertion in model container [2024-06-20 16:48:42,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:48:41" (2/4) ... [2024-06-20 16:48:42,680 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1890c1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:48:42, skipping insertion in model container [2024-06-20 16:48:42,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:48:41" (3/4) ... [2024-06-20 16:48:42,680 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1890c1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:48:42, skipping insertion in model container [2024-06-20 16:48:42,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:48:42" (4/4) ... [2024-06-20 16:48:42,681 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-20 16:48:42,693 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:48:42,693 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:48:42,693 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:48:42,730 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:48:42,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 16:48:42,784 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-20 16:48:42,784 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:48:42,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:48:42,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 16:48:42,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-20 16:48:42,799 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:48:42,804 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;@4ac68ba0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:48:42,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:48:42,811 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:48:42,811 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 16:48:42,811 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:48:42,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:42,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:48:42,812 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)] === [2024-06-20 16:48:42,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:42,851 INFO L85 PathProgramCache]: Analyzing trace with hash 441899971, now seen corresponding path program 1 times [2024-06-20 16:48:42,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:42,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145539684] [2024-06-20 16:48:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:42,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:43,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:43,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145539684] [2024-06-20 16:48:43,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145539684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:43,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:43,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:48:43,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940623993] [2024-06-20 16:48:43,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:43,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:48:43,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:43,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:48:43,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:48:43,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:48:43,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:43,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:43,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:48:43,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:44,330 INFO L124 PetriNetUnfolderBase]: 1354/2038 cut-off events. [2024-06-20 16:48:44,331 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-20 16:48:44,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4150 conditions, 2038 events. 1354/2038 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9585 event pairs, 709 based on Foata normal form. 4/2007 useless extension candidates. Maximal degree in co-relation 4138. Up to 2016 conditions per place. [2024-06-20 16:48:44,344 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-20 16:48:44,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 181 flow [2024-06-20 16:48:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:48:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:48:44,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-20 16:48:44,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 16:48:44,354 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-20 16:48:44,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 181 flow [2024-06-20 16:48:44,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:48:44,358 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-20 16:48:44,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-20 16:48:44,362 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-20 16:48:44,362 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-20 16:48:44,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:44,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:44,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:44,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:48:44,363 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)] === [2024-06-20 16:48:44,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:44,363 INFO L85 PathProgramCache]: Analyzing trace with hash -535779076, now seen corresponding path program 1 times [2024-06-20 16:48:44,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:44,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415671508] [2024-06-20 16:48:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:44,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:44,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:44,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415671508] [2024-06-20 16:48:44,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415671508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:44,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:44,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:48:44,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685012393] [2024-06-20 16:48:44,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:44,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:48:44,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:44,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:48:44,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:48:45,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:48:45,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:45,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:45,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:48:45,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:45,346 INFO L124 PetriNetUnfolderBase]: 1363/2050 cut-off events. [2024-06-20 16:48:45,346 INFO L125 PetriNetUnfolderBase]: For 316/319 co-relation queries the response was YES. [2024-06-20 16:48:45,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4738 conditions, 2050 events. 1363/2050 cut-off events. For 316/319 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9433 event pairs, 772 based on Foata normal form. 8/2057 useless extension candidates. Maximal degree in co-relation 4726. Up to 2013 conditions per place. [2024-06-20 16:48:45,355 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 45 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-20 16:48:45,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 266 flow [2024-06-20 16:48:45,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:48:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:48:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-20 16:48:45,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 16:48:45,357 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 92 transitions. [2024-06-20 16:48:45,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 266 flow [2024-06-20 16:48:45,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:48:45,359 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 154 flow [2024-06-20 16:48:45,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-20 16:48:45,360 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-20 16:48:45,360 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 154 flow [2024-06-20 16:48:45,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:45,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:45,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:45,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:48:45,361 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)] === [2024-06-20 16:48:45,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:45,361 INFO L85 PathProgramCache]: Analyzing trace with hash 570718658, now seen corresponding path program 1 times [2024-06-20 16:48:45,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:45,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150379416] [2024-06-20 16:48:45,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:45,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:46,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:46,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150379416] [2024-06-20 16:48:46,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150379416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:46,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:46,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:48:46,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357672269] [2024-06-20 16:48:46,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:46,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:48:46,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:46,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:48:46,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:48:46,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:48:46,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:46,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:46,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:48:46,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:46,457 INFO L124 PetriNetUnfolderBase]: 1664/2484 cut-off events. [2024-06-20 16:48:46,458 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2024-06-20 16:48:46,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6476 conditions, 2484 events. 1664/2484 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11396 event pairs, 791 based on Foata normal form. 6/2490 useless extension candidates. Maximal degree in co-relation 6461. Up to 2418 conditions per place. [2024-06-20 16:48:46,471 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 62 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-20 16:48:46,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 407 flow [2024-06-20 16:48:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:48:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:48:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-20 16:48:46,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-20 16:48:46,477 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 154 flow. Second operand 5 states and 111 transitions. [2024-06-20 16:48:46,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 407 flow [2024-06-20 16:48:46,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 392 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-20 16:48:46,480 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 230 flow [2024-06-20 16:48:46,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2024-06-20 16:48:46,481 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-20 16:48:46,481 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 230 flow [2024-06-20 16:48:46,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:46,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:46,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:46,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:48:46,482 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:46,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:46,482 INFO L85 PathProgramCache]: Analyzing trace with hash 429293185, now seen corresponding path program 1 times [2024-06-20 16:48:46,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:46,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002598682] [2024-06-20 16:48:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:46,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:47,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:47,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002598682] [2024-06-20 16:48:47,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002598682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:47,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:47,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:48:47,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065348422] [2024-06-20 16:48:47,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:47,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:48:47,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:47,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:48:47,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:48:47,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:48:47,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:47,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:47,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:48:47,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:47,979 INFO L124 PetriNetUnfolderBase]: 1692/2524 cut-off events. [2024-06-20 16:48:47,980 INFO L125 PetriNetUnfolderBase]: For 2207/2207 co-relation queries the response was YES. [2024-06-20 16:48:47,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7261 conditions, 2524 events. 1692/2524 cut-off events. For 2207/2207 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11786 event pairs, 493 based on Foata normal form. 9/2533 useless extension candidates. Maximal degree in co-relation 7242. Up to 2382 conditions per place. [2024-06-20 16:48:47,991 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 73 selfloop transitions, 23 changer transitions 0/100 dead transitions. [2024-06-20 16:48:47,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 100 transitions, 586 flow [2024-06-20 16:48:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:48:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:48:47,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-20 16:48:47,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-20 16:48:47,993 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 230 flow. Second operand 6 states and 137 transitions. [2024-06-20 16:48:47,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 100 transitions, 586 flow [2024-06-20 16:48:47,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 100 transitions, 582 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 16:48:47,998 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 391 flow [2024-06-20 16:48:47,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2024-06-20 16:48:47,999 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-06-20 16:48:47,999 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 391 flow [2024-06-20 16:48:47,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:47,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:47,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:48,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:48:48,000 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)] === [2024-06-20 16:48:48,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:48,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1295155967, now seen corresponding path program 1 times [2024-06-20 16:48:48,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:48,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796682224] [2024-06-20 16:48:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:48,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:49,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:49,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796682224] [2024-06-20 16:48:49,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796682224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:49,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:49,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:48:49,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935610854] [2024-06-20 16:48:49,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:49,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:48:49,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:49,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:48:49,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:48:49,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:48:49,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 391 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-20 16:48:49,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:49,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:48:49,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:49,588 INFO L124 PetriNetUnfolderBase]: 1683/2509 cut-off events. [2024-06-20 16:48:49,588 INFO L125 PetriNetUnfolderBase]: For 5076/5076 co-relation queries the response was YES. [2024-06-20 16:48:49,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8821 conditions, 2509 events. 1683/2509 cut-off events. For 5076/5076 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11270 event pairs, 557 based on Foata normal form. 6/2515 useless extension candidates. Maximal degree in co-relation 8796. Up to 2422 conditions per place. [2024-06-20 16:48:49,601 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 86 selfloop transitions, 15 changer transitions 0/105 dead transitions. [2024-06-20 16:48:49,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 105 transitions, 740 flow [2024-06-20 16:48:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:48:49,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:48:49,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-20 16:48:49,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49642857142857144 [2024-06-20 16:48:49,603 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 391 flow. Second operand 7 states and 139 transitions. [2024-06-20 16:48:49,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 105 transitions, 740 flow [2024-06-20 16:48:49,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 105 transitions, 720 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-20 16:48:49,609 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 499 flow [2024-06-20 16:48:49,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=499, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-20 16:48:49,609 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-20 16:48:49,609 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 499 flow [2024-06-20 16:48:49,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-20 16:48:49,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:49,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:49,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:48:49,610 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)] === [2024-06-20 16:48:49,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:49,611 INFO L85 PathProgramCache]: Analyzing trace with hash 524203061, now seen corresponding path program 1 times [2024-06-20 16:48:49,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:49,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932617746] [2024-06-20 16:48:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:49,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:50,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:50,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932617746] [2024-06-20 16:48:50,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932617746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:50,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:50,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:48:50,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725658309] [2024-06-20 16:48:50,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:50,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:48:50,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:50,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:48:50,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:48:50,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:48:50,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 499 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:50,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:50,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:48:50,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:50,755 INFO L124 PetriNetUnfolderBase]: 1673/2496 cut-off events. [2024-06-20 16:48:50,755 INFO L125 PetriNetUnfolderBase]: For 6317/6319 co-relation queries the response was YES. [2024-06-20 16:48:50,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9218 conditions, 2496 events. 1673/2496 cut-off events. For 6317/6319 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11203 event pairs, 650 based on Foata normal form. 6/2502 useless extension candidates. Maximal degree in co-relation 9186. Up to 2456 conditions per place. [2024-06-20 16:48:50,776 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 74 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-06-20 16:48:50,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 711 flow [2024-06-20 16:48:50,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:48:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:48:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-20 16:48:50,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-20 16:48:50,778 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 499 flow. Second operand 5 states and 83 transitions. [2024-06-20 16:48:50,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 711 flow [2024-06-20 16:48:50,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 693 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-20 16:48:50,787 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 529 flow [2024-06-20 16:48:50,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=529, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-20 16:48:50,790 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-20 16:48:50,790 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 529 flow [2024-06-20 16:48:50,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:50,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:50,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:50,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:48:50,791 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)] === [2024-06-20 16:48:50,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:50,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1174386298, now seen corresponding path program 1 times [2024-06-20 16:48:50,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:50,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279366346] [2024-06-20 16:48:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:50,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:51,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:51,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279366346] [2024-06-20 16:48:51,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279366346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:51,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:51,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:48:51,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317872542] [2024-06-20 16:48:51,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:51,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:48:51,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:51,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:48:51,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:48:51,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:48:51,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 529 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:48:51,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:51,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:48:51,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:52,210 INFO L124 PetriNetUnfolderBase]: 1723/2566 cut-off events. [2024-06-20 16:48:52,210 INFO L125 PetriNetUnfolderBase]: For 8349/8353 co-relation queries the response was YES. [2024-06-20 16:48:52,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10052 conditions, 2566 events. 1723/2566 cut-off events. For 8349/8353 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11675 event pairs, 625 based on Foata normal form. 9/2575 useless extension candidates. Maximal degree in co-relation 10017. Up to 2405 conditions per place. [2024-06-20 16:48:52,229 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 90 selfloop transitions, 24 changer transitions 0/117 dead transitions. [2024-06-20 16:48:52,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 949 flow [2024-06-20 16:48:52,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:48:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:48:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 16:48:52,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-20 16:48:52,232 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 529 flow. Second operand 7 states and 129 transitions. [2024-06-20 16:48:52,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 949 flow [2024-06-20 16:48:52,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 117 transitions, 925 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:48:52,241 INFO L231 Difference]: Finished difference. Result has 77 places, 81 transitions, 612 flow [2024-06-20 16:48:52,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=612, PETRI_PLACES=77, PETRI_TRANSITIONS=81} [2024-06-20 16:48:52,243 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-20 16:48:52,243 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 81 transitions, 612 flow [2024-06-20 16:48:52,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:48:52,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:52,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:52,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:48:52,244 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)] === [2024-06-20 16:48:52,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:52,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1174266328, now seen corresponding path program 2 times [2024-06-20 16:48:52,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:52,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551805979] [2024-06-20 16:48:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:52,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:53,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:53,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551805979] [2024-06-20 16:48:53,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551805979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:53,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:53,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:48:53,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699351966] [2024-06-20 16:48:53,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:53,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:48:53,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:53,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:48:53,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:48:53,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:48:53,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 81 transitions, 612 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:48:53,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:53,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:48:53,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:53,796 INFO L124 PetriNetUnfolderBase]: 1775/2640 cut-off events. [2024-06-20 16:48:53,796 INFO L125 PetriNetUnfolderBase]: For 11142/11146 co-relation queries the response was YES. [2024-06-20 16:48:53,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11024 conditions, 2640 events. 1775/2640 cut-off events. For 11142/11146 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12000 event pairs, 645 based on Foata normal form. 9/2649 useless extension candidates. Maximal degree in co-relation 10988. Up to 2528 conditions per place. [2024-06-20 16:48:53,813 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 94 selfloop transitions, 21 changer transitions 0/118 dead transitions. [2024-06-20 16:48:53,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 118 transitions, 1002 flow [2024-06-20 16:48:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:48:53,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:48:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 16:48:53,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-20 16:48:53,815 INFO L175 Difference]: Start difference. First operand has 77 places, 81 transitions, 612 flow. Second operand 7 states and 123 transitions. [2024-06-20 16:48:53,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 118 transitions, 1002 flow [2024-06-20 16:48:53,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 118 transitions, 967 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 16:48:53,830 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 683 flow [2024-06-20 16:48:53,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=683, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-06-20 16:48:53,832 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-20 16:48:53,833 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 683 flow [2024-06-20 16:48:53,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:48:53,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:53,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:53,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:48:53,834 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)] === [2024-06-20 16:48:53,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:53,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1502417388, now seen corresponding path program 1 times [2024-06-20 16:48:53,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:53,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169082947] [2024-06-20 16:48:53,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:53,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:54,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:54,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169082947] [2024-06-20 16:48:54,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169082947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:54,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:54,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:48:54,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091273035] [2024-06-20 16:48:54,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:54,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:48:54,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:54,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:48:54,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:48:54,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:48:54,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 683 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:48:54,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:54,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:48:54,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:55,268 INFO L124 PetriNetUnfolderBase]: 1797/2673 cut-off events. [2024-06-20 16:48:55,268 INFO L125 PetriNetUnfolderBase]: For 12776/12776 co-relation queries the response was YES. [2024-06-20 16:48:55,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11479 conditions, 2673 events. 1797/2673 cut-off events. For 12776/12776 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12113 event pairs, 613 based on Foata normal form. 4/2676 useless extension candidates. Maximal degree in co-relation 11441. Up to 2547 conditions per place. [2024-06-20 16:48:55,286 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 100 selfloop transitions, 22 changer transitions 0/125 dead transitions. [2024-06-20 16:48:55,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 125 transitions, 1110 flow [2024-06-20 16:48:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:48:55,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:48:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 16:48:55,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-20 16:48:55,288 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 683 flow. Second operand 7 states and 121 transitions. [2024-06-20 16:48:55,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 125 transitions, 1110 flow [2024-06-20 16:48:55,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 125 transitions, 1047 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 16:48:55,307 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 776 flow [2024-06-20 16:48:55,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=776, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2024-06-20 16:48:55,308 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-20 16:48:55,308 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 776 flow [2024-06-20 16:48:55,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:48:55,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:55,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:55,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:48:55,309 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)] === [2024-06-20 16:48:55,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:55,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2104968880, now seen corresponding path program 2 times [2024-06-20 16:48:55,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:55,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729421914] [2024-06-20 16:48:55,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:55,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:56,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:56,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729421914] [2024-06-20 16:48:56,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729421914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:56,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:56,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:48:56,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364726097] [2024-06-20 16:48:56,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:56,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:48:56,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:56,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:48:56,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:48:56,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:48:56,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 776 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:48:56,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:56,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:48:56,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:56,636 INFO L124 PetriNetUnfolderBase]: 1819/2705 cut-off events. [2024-06-20 16:48:56,637 INFO L125 PetriNetUnfolderBase]: For 15482/15484 co-relation queries the response was YES. [2024-06-20 16:48:56,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12199 conditions, 2705 events. 1819/2705 cut-off events. For 15482/15484 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12240 event pairs, 624 based on Foata normal form. 6/2711 useless extension candidates. Maximal degree in co-relation 12158. Up to 2646 conditions per place. [2024-06-20 16:48:56,654 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 100 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2024-06-20 16:48:56,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 119 transitions, 1092 flow [2024-06-20 16:48:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:48:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:48:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-20 16:48:56,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-20 16:48:56,656 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 776 flow. Second operand 6 states and 98 transitions. [2024-06-20 16:48:56,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 119 transitions, 1092 flow [2024-06-20 16:48:56,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 119 transitions, 1054 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-20 16:48:56,673 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 834 flow [2024-06-20 16:48:56,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=834, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-06-20 16:48:56,674 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-20 16:48:56,674 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 834 flow [2024-06-20 16:48:56,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:48:56,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:56,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:56,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:48:56,674 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)] === [2024-06-20 16:48:56,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:56,675 INFO L85 PathProgramCache]: Analyzing trace with hash -224952088, now seen corresponding path program 3 times [2024-06-20 16:48:56,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:56,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728953967] [2024-06-20 16:48:56,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:56,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:57,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:57,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728953967] [2024-06-20 16:48:57,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728953967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:57,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:57,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:48:57,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290719336] [2024-06-20 16:48:57,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:57,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:48:57,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:57,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:48:57,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:48:57,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:48:57,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 834 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:48:57,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:57,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:48:57,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:58,029 INFO L124 PetriNetUnfolderBase]: 1805/2685 cut-off events. [2024-06-20 16:48:58,029 INFO L125 PetriNetUnfolderBase]: For 18093/18097 co-relation queries the response was YES. [2024-06-20 16:48:58,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12483 conditions, 2685 events. 1805/2685 cut-off events. For 18093/18097 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12135 event pairs, 617 based on Foata normal form. 9/2694 useless extension candidates. Maximal degree in co-relation 12439. Up to 2567 conditions per place. [2024-06-20 16:48:58,046 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 103 selfloop transitions, 24 changer transitions 0/130 dead transitions. [2024-06-20 16:48:58,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 130 transitions, 1183 flow [2024-06-20 16:48:58,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:48:58,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:48:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-20 16:48:58,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 16:48:58,048 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 834 flow. Second operand 6 states and 110 transitions. [2024-06-20 16:48:58,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 130 transitions, 1183 flow [2024-06-20 16:48:58,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 130 transitions, 1149 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-20 16:48:58,066 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 864 flow [2024-06-20 16:48:58,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=864, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2024-06-20 16:48:58,067 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-20 16:48:58,067 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 864 flow [2024-06-20 16:48:58,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:48:58,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:58,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:58,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:48:58,068 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)] === [2024-06-20 16:48:58,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:58,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2105206030, now seen corresponding path program 3 times [2024-06-20 16:48:58,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:58,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075579339] [2024-06-20 16:48:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:58,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:58,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:58,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075579339] [2024-06-20 16:48:58,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075579339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:58,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:58,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:48:58,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794689259] [2024-06-20 16:48:58,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:58,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:48:58,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:58,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:48:58,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:48:58,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:48:58,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 864 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:48:58,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:58,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:48:58,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:59,427 INFO L124 PetriNetUnfolderBase]: 1811/2706 cut-off events. [2024-06-20 16:48:59,427 INFO L125 PetriNetUnfolderBase]: For 21483/21483 co-relation queries the response was YES. [2024-06-20 16:48:59,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12818 conditions, 2706 events. 1811/2706 cut-off events. For 21483/21483 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12404 event pairs, 897 based on Foata normal form. 4/2710 useless extension candidates. Maximal degree in co-relation 12772. Up to 2598 conditions per place. [2024-06-20 16:48:59,442 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 103 selfloop transitions, 25 changer transitions 0/131 dead transitions. [2024-06-20 16:48:59,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 131 transitions, 1289 flow [2024-06-20 16:48:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:48:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:48:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-20 16:48:59,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-20 16:48:59,444 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 864 flow. Second operand 8 states and 124 transitions. [2024-06-20 16:48:59,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 131 transitions, 1289 flow [2024-06-20 16:48:59,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 131 transitions, 1226 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 16:48:59,465 INFO L231 Difference]: Finished difference. Result has 100 places, 109 transitions, 942 flow [2024-06-20 16:48:59,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=942, PETRI_PLACES=100, PETRI_TRANSITIONS=109} [2024-06-20 16:48:59,465 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-20 16:48:59,466 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 109 transitions, 942 flow [2024-06-20 16:48:59,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:48:59,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:59,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:59,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:48:59,466 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)] === [2024-06-20 16:48:59,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:59,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1248015924, now seen corresponding path program 1 times [2024-06-20 16:48:59,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:59,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20967467] [2024-06-20 16:48:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:59,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:00,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:00,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20967467] [2024-06-20 16:49:00,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20967467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:00,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:00,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:00,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936508078] [2024-06-20 16:49:00,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:00,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:00,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:00,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:00,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:00,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:00,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 109 transitions, 942 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:00,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:00,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:00,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:01,019 INFO L124 PetriNetUnfolderBase]: 1803/2695 cut-off events. [2024-06-20 16:49:01,020 INFO L125 PetriNetUnfolderBase]: For 23600/23604 co-relation queries the response was YES. [2024-06-20 16:49:01,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12982 conditions, 2695 events. 1803/2695 cut-off events. For 23600/23604 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12333 event pairs, 882 based on Foata normal form. 8/2703 useless extension candidates. Maximal degree in co-relation 12933. Up to 2624 conditions per place. [2024-06-20 16:49:01,034 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 108 selfloop transitions, 15 changer transitions 0/126 dead transitions. [2024-06-20 16:49:01,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 126 transitions, 1244 flow [2024-06-20 16:49:01,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:49:01,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:49:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-20 16:49:01,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-20 16:49:01,035 INFO L175 Difference]: Start difference. First operand has 100 places, 109 transitions, 942 flow. Second operand 6 states and 97 transitions. [2024-06-20 16:49:01,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 126 transitions, 1244 flow [2024-06-20 16:49:01,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 126 transitions, 1168 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:01,059 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 925 flow [2024-06-20 16:49:01,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=925, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-06-20 16:49:01,060 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-20 16:49:01,060 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 925 flow [2024-06-20 16:49:01,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:01,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:01,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:01,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:49:01,061 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)] === [2024-06-20 16:49:01,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:01,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1224558505, now seen corresponding path program 1 times [2024-06-20 16:49:01,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:01,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849803979] [2024-06-20 16:49:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:01,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:01,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:01,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849803979] [2024-06-20 16:49:01,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849803979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:01,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:01,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:01,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958072490] [2024-06-20 16:49:01,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:01,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:01,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:01,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:01,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:01,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:01,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 925 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:01,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:01,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:01,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:02,646 INFO L124 PetriNetUnfolderBase]: 1959/2919 cut-off events. [2024-06-20 16:49:02,646 INFO L125 PetriNetUnfolderBase]: For 27699/27711 co-relation queries the response was YES. [2024-06-20 16:49:02,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14379 conditions, 2919 events. 1959/2919 cut-off events. For 27699/27711 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13454 event pairs, 597 based on Foata normal form. 12/2931 useless extension candidates. Maximal degree in co-relation 14330. Up to 2588 conditions per place. [2024-06-20 16:49:02,665 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 135 selfloop transitions, 56 changer transitions 0/194 dead transitions. [2024-06-20 16:49:02,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 194 transitions, 1930 flow [2024-06-20 16:49:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:02,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 16:49:02,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-20 16:49:02,667 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 925 flow. Second operand 9 states and 168 transitions. [2024-06-20 16:49:02,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 194 transitions, 1930 flow [2024-06-20 16:49:02,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 194 transitions, 1889 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 16:49:02,696 INFO L231 Difference]: Finished difference. Result has 109 places, 145 transitions, 1346 flow [2024-06-20 16:49:02,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1346, PETRI_PLACES=109, PETRI_TRANSITIONS=145} [2024-06-20 16:49:02,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-20 16:49:02,697 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 145 transitions, 1346 flow [2024-06-20 16:49:02,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:02,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:02,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:02,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:49:02,698 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)] === [2024-06-20 16:49:02,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:02,698 INFO L85 PathProgramCache]: Analyzing trace with hash 202853581, now seen corresponding path program 2 times [2024-06-20 16:49:02,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:02,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310928597] [2024-06-20 16:49:02,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:02,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:03,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:03,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310928597] [2024-06-20 16:49:03,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310928597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:03,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:03,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:03,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724440546] [2024-06-20 16:49:03,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:03,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:03,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:03,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:03,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:03,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:03,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 145 transitions, 1346 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:03,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:03,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:03,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:04,385 INFO L124 PetriNetUnfolderBase]: 2288/3411 cut-off events. [2024-06-20 16:49:04,385 INFO L125 PetriNetUnfolderBase]: For 38104/38112 co-relation queries the response was YES. [2024-06-20 16:49:04,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18935 conditions, 3411 events. 2288/3411 cut-off events. For 38104/38112 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16105 event pairs, 769 based on Foata normal form. 8/3419 useless extension candidates. Maximal degree in co-relation 18882. Up to 2844 conditions per place. [2024-06-20 16:49:04,408 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 161 selfloop transitions, 102 changer transitions 0/266 dead transitions. [2024-06-20 16:49:04,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 266 transitions, 3033 flow [2024-06-20 16:49:04,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:04,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 16:49:04,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-20 16:49:04,410 INFO L175 Difference]: Start difference. First operand has 109 places, 145 transitions, 1346 flow. Second operand 9 states and 168 transitions. [2024-06-20 16:49:04,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 266 transitions, 3033 flow [2024-06-20 16:49:04,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 266 transitions, 2930 flow, removed 45 selfloop flow, removed 2 redundant places. [2024-06-20 16:49:04,456 INFO L231 Difference]: Finished difference. Result has 120 places, 211 transitions, 2338 flow [2024-06-20 16:49:04,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2338, PETRI_PLACES=120, PETRI_TRANSITIONS=211} [2024-06-20 16:49:04,457 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-20 16:49:04,457 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 211 transitions, 2338 flow [2024-06-20 16:49:04,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:04,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:04,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:04,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:49:04,458 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)] === [2024-06-20 16:49:04,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:04,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1350875793, now seen corresponding path program 3 times [2024-06-20 16:49:04,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:04,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891865618] [2024-06-20 16:49:04,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:04,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:05,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:05,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891865618] [2024-06-20 16:49:05,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891865618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:05,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:05,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:05,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536280085] [2024-06-20 16:49:05,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:05,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:05,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:05,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:05,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:05,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 211 transitions, 2338 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:05,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:05,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:05,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:06,162 INFO L124 PetriNetUnfolderBase]: 2505/3730 cut-off events. [2024-06-20 16:49:06,162 INFO L125 PetriNetUnfolderBase]: For 48838/48846 co-relation queries the response was YES. [2024-06-20 16:49:06,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22755 conditions, 3730 events. 2505/3730 cut-off events. For 48838/48846 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 17902 event pairs, 754 based on Foata normal form. 8/3738 useless extension candidates. Maximal degree in co-relation 22696. Up to 3045 conditions per place. [2024-06-20 16:49:06,232 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 162 selfloop transitions, 146 changer transitions 0/311 dead transitions. [2024-06-20 16:49:06,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 311 transitions, 3984 flow [2024-06-20 16:49:06,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:49:06,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-20 16:49:06,234 INFO L175 Difference]: Start difference. First operand has 120 places, 211 transitions, 2338 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:49:06,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 311 transitions, 3984 flow [2024-06-20 16:49:06,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 311 transitions, 3881 flow, removed 45 selfloop flow, removed 2 redundant places. [2024-06-20 16:49:06,303 INFO L231 Difference]: Finished difference. Result has 130 places, 268 transitions, 3390 flow [2024-06-20 16:49:06,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2289, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3390, PETRI_PLACES=130, PETRI_TRANSITIONS=268} [2024-06-20 16:49:06,303 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-20 16:49:06,304 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 268 transitions, 3390 flow [2024-06-20 16:49:06,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:06,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:06,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:06,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:49:06,304 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)] === [2024-06-20 16:49:06,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:06,305 INFO L85 PathProgramCache]: Analyzing trace with hash -723088555, now seen corresponding path program 4 times [2024-06-20 16:49:06,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:06,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288368165] [2024-06-20 16:49:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:06,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:07,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:07,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288368165] [2024-06-20 16:49:07,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288368165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:07,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:07,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:07,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41750698] [2024-06-20 16:49:07,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:07,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:07,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:07,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:07,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 268 transitions, 3390 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:07,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:07,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:07,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:08,236 INFO L124 PetriNetUnfolderBase]: 2596/3859 cut-off events. [2024-06-20 16:49:08,236 INFO L125 PetriNetUnfolderBase]: For 61524/61532 co-relation queries the response was YES. [2024-06-20 16:49:08,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25958 conditions, 3859 events. 2596/3859 cut-off events. For 61524/61532 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18628 event pairs, 771 based on Foata normal form. 18/3877 useless extension candidates. Maximal degree in co-relation 25894. Up to 3338 conditions per place. [2024-06-20 16:49:08,265 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 226 selfloop transitions, 112 changer transitions 0/341 dead transitions. [2024-06-20 16:49:08,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 341 transitions, 4877 flow [2024-06-20 16:49:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 16:49:08,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-20 16:49:08,267 INFO L175 Difference]: Start difference. First operand has 130 places, 268 transitions, 3390 flow. Second operand 9 states and 167 transitions. [2024-06-20 16:49:08,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 341 transitions, 4877 flow [2024-06-20 16:49:08,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 341 transitions, 4759 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:08,348 INFO L231 Difference]: Finished difference. Result has 137 places, 293 transitions, 3962 flow [2024-06-20 16:49:08,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3286, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3962, PETRI_PLACES=137, PETRI_TRANSITIONS=293} [2024-06-20 16:49:08,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-20 16:49:08,349 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 293 transitions, 3962 flow [2024-06-20 16:49:08,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:08,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:08,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:08,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:49:08,350 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)] === [2024-06-20 16:49:08,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:08,350 INFO L85 PathProgramCache]: Analyzing trace with hash -724068620, now seen corresponding path program 1 times [2024-06-20 16:49:08,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:08,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638834078] [2024-06-20 16:49:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:08,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:09,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:09,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638834078] [2024-06-20 16:49:09,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638834078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:09,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:09,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:09,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322804402] [2024-06-20 16:49:09,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:09,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:09,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:09,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:09,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:09,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:09,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 293 transitions, 3962 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:09,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:09,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:09,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:10,023 INFO L124 PetriNetUnfolderBase]: 2642/3927 cut-off events. [2024-06-20 16:49:10,023 INFO L125 PetriNetUnfolderBase]: For 67201/67205 co-relation queries the response was YES. [2024-06-20 16:49:10,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27084 conditions, 3927 events. 2642/3927 cut-off events. For 67201/67205 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19041 event pairs, 751 based on Foata normal form. 12/3939 useless extension candidates. Maximal degree in co-relation 27017. Up to 2880 conditions per place. [2024-06-20 16:49:10,052 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 169 selfloop transitions, 192 changer transitions 0/364 dead transitions. [2024-06-20 16:49:10,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 364 transitions, 5367 flow [2024-06-20 16:49:10,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 16:49:10,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-20 16:49:10,066 INFO L175 Difference]: Start difference. First operand has 137 places, 293 transitions, 3962 flow. Second operand 9 states and 168 transitions. [2024-06-20 16:49:10,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 364 transitions, 5367 flow [2024-06-20 16:49:10,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 364 transitions, 5027 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:10,161 INFO L231 Difference]: Finished difference. Result has 142 places, 312 transitions, 4392 flow [2024-06-20 16:49:10,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4392, PETRI_PLACES=142, PETRI_TRANSITIONS=312} [2024-06-20 16:49:10,162 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-20 16:49:10,162 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 312 transitions, 4392 flow [2024-06-20 16:49:10,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:10,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:10,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:10,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:49:10,162 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)] === [2024-06-20 16:49:10,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:10,163 INFO L85 PathProgramCache]: Analyzing trace with hash 206518711, now seen corresponding path program 5 times [2024-06-20 16:49:10,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:10,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124549782] [2024-06-20 16:49:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:10,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:11,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:11,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124549782] [2024-06-20 16:49:11,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124549782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:11,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:11,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:11,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806859674] [2024-06-20 16:49:11,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:11,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:11,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:11,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:11,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:11,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:11,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 312 transitions, 4392 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:11,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:11,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:11,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:12,317 INFO L124 PetriNetUnfolderBase]: 2878/4256 cut-off events. [2024-06-20 16:49:12,317 INFO L125 PetriNetUnfolderBase]: For 75702/75710 co-relation queries the response was YES. [2024-06-20 16:49:12,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30069 conditions, 4256 events. 2878/4256 cut-off events. For 75702/75710 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20947 event pairs, 736 based on Foata normal form. 15/4271 useless extension candidates. Maximal degree in co-relation 29999. Up to 3798 conditions per place. [2024-06-20 16:49:12,347 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 323 selfloop transitions, 103 changer transitions 0/429 dead transitions. [2024-06-20 16:49:12,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 429 transitions, 6327 flow [2024-06-20 16:49:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:49:12,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 16:49:12,349 INFO L175 Difference]: Start difference. First operand has 142 places, 312 transitions, 4392 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:49:12,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 429 transitions, 6327 flow [2024-06-20 16:49:12,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 429 transitions, 6223 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:12,452 INFO L231 Difference]: Finished difference. Result has 152 places, 378 transitions, 5401 flow [2024-06-20 16:49:12,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4290, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5401, PETRI_PLACES=152, PETRI_TRANSITIONS=378} [2024-06-20 16:49:12,452 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-20 16:49:12,452 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 378 transitions, 5401 flow [2024-06-20 16:49:12,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:12,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:12,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:12,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:49:12,453 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)] === [2024-06-20 16:49:12,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:12,453 INFO L85 PathProgramCache]: Analyzing trace with hash 202943946, now seen corresponding path program 2 times [2024-06-20 16:49:12,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:12,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805245733] [2024-06-20 16:49:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:12,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:13,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:13,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805245733] [2024-06-20 16:49:13,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805245733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:13,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:13,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:13,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229747950] [2024-06-20 16:49:13,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:13,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:13,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:13,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:13,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:13,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:13,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 378 transitions, 5401 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:13,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:13,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:13,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:14,269 INFO L124 PetriNetUnfolderBase]: 3136/4630 cut-off events. [2024-06-20 16:49:14,269 INFO L125 PetriNetUnfolderBase]: For 90539/90547 co-relation queries the response was YES. [2024-06-20 16:49:14,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35292 conditions, 4630 events. 3136/4630 cut-off events. For 90539/90547 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22985 event pairs, 657 based on Foata normal form. 17/4647 useless extension candidates. Maximal degree in co-relation 35216. Up to 3399 conditions per place. [2024-06-20 16:49:14,305 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 244 selfloop transitions, 247 changer transitions 0/494 dead transitions. [2024-06-20 16:49:14,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 494 transitions, 7884 flow [2024-06-20 16:49:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:14,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:14,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 16:49:14,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-20 16:49:14,306 INFO L175 Difference]: Start difference. First operand has 152 places, 378 transitions, 5401 flow. Second operand 9 states and 171 transitions. [2024-06-20 16:49:14,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 494 transitions, 7884 flow [2024-06-20 16:49:14,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 494 transitions, 7814 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-20 16:49:14,440 INFO L231 Difference]: Finished difference. Result has 163 places, 436 transitions, 6950 flow [2024-06-20 16:49:14,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5331, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6950, PETRI_PLACES=163, PETRI_TRANSITIONS=436} [2024-06-20 16:49:14,440 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 122 predicate places. [2024-06-20 16:49:14,440 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 436 transitions, 6950 flow [2024-06-20 16:49:14,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:14,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:14,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:14,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:49:14,441 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)] === [2024-06-20 16:49:14,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:14,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1151341206, now seen corresponding path program 3 times [2024-06-20 16:49:14,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:14,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485888700] [2024-06-20 16:49:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:14,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:15,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:15,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485888700] [2024-06-20 16:49:15,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485888700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:15,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:15,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:15,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864328692] [2024-06-20 16:49:15,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:15,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:15,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:15,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:15,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:15,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:15,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 436 transitions, 6950 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:15,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:15,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:15,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:16,524 INFO L124 PetriNetUnfolderBase]: 3277/4838 cut-off events. [2024-06-20 16:49:16,524 INFO L125 PetriNetUnfolderBase]: For 105120/105124 co-relation queries the response was YES. [2024-06-20 16:49:16,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39293 conditions, 4838 events. 3277/4838 cut-off events. For 105120/105124 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24263 event pairs, 870 based on Foata normal form. 9/4847 useless extension candidates. Maximal degree in co-relation 39211. Up to 4339 conditions per place. [2024-06-20 16:49:16,566 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 394 selfloop transitions, 133 changer transitions 0/530 dead transitions. [2024-06-20 16:49:16,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 530 transitions, 9300 flow [2024-06-20 16:49:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:49:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:49:16,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-20 16:49:16,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-20 16:49:16,568 INFO L175 Difference]: Start difference. First operand has 163 places, 436 transitions, 6950 flow. Second operand 11 states and 192 transitions. [2024-06-20 16:49:16,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 530 transitions, 9300 flow [2024-06-20 16:49:16,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 530 transitions, 8955 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:16,759 INFO L231 Difference]: Finished difference. Result has 175 places, 474 transitions, 7710 flow [2024-06-20 16:49:16,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6630, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7710, PETRI_PLACES=175, PETRI_TRANSITIONS=474} [2024-06-20 16:49:16,760 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-20 16:49:16,760 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 474 transitions, 7710 flow [2024-06-20 16:49:16,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:16,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:16,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:16,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:49:16,760 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)] === [2024-06-20 16:49:16,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:16,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1120948806, now seen corresponding path program 4 times [2024-06-20 16:49:16,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:16,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174400927] [2024-06-20 16:49:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:16,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:17,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:17,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174400927] [2024-06-20 16:49:17,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174400927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:17,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:17,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:17,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613225026] [2024-06-20 16:49:17,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:17,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:17,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:17,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:17,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:17,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:17,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 474 transitions, 7710 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:17,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:17,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:17,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:18,581 INFO L124 PetriNetUnfolderBase]: 3252/4806 cut-off events. [2024-06-20 16:49:18,581 INFO L125 PetriNetUnfolderBase]: For 112100/112104 co-relation queries the response was YES. [2024-06-20 16:49:18,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38928 conditions, 4806 events. 3252/4806 cut-off events. For 112100/112104 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24104 event pairs, 867 based on Foata normal form. 15/4821 useless extension candidates. Maximal degree in co-relation 38841. Up to 4330 conditions per place. [2024-06-20 16:49:18,625 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 388 selfloop transitions, 128 changer transitions 0/519 dead transitions. [2024-06-20 16:49:18,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 519 transitions, 9217 flow [2024-06-20 16:49:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:18,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:49:18,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:49:18,627 INFO L175 Difference]: Start difference. First operand has 175 places, 474 transitions, 7710 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:49:18,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 519 transitions, 9217 flow [2024-06-20 16:49:18,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 519 transitions, 8863 flow, removed 123 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:18,848 INFO L231 Difference]: Finished difference. Result has 181 places, 474 transitions, 7638 flow [2024-06-20 16:49:18,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7356, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7638, PETRI_PLACES=181, PETRI_TRANSITIONS=474} [2024-06-20 16:49:18,849 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-20 16:49:18,849 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 474 transitions, 7638 flow [2024-06-20 16:49:18,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:18,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:18,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:18,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:49:18,849 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)] === [2024-06-20 16:49:18,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash 206662861, now seen corresponding path program 6 times [2024-06-20 16:49:18,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:18,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169901126] [2024-06-20 16:49:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:18,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:19,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:19,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169901126] [2024-06-20 16:49:19,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169901126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:19,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:19,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:19,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253459383] [2024-06-20 16:49:19,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:19,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:19,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:19,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:19,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:19,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:19,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 474 transitions, 7638 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:19,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:19,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:19,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:21,017 INFO L124 PetriNetUnfolderBase]: 3276/4837 cut-off events. [2024-06-20 16:49:21,017 INFO L125 PetriNetUnfolderBase]: For 114551/114557 co-relation queries the response was YES. [2024-06-20 16:49:21,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38931 conditions, 4837 events. 3276/4837 cut-off events. For 114551/114557 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 24269 event pairs, 852 based on Foata normal form. 13/4850 useless extension candidates. Maximal degree in co-relation 38843. Up to 4575 conditions per place. [2024-06-20 16:49:21,067 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 468 selfloop transitions, 65 changer transitions 0/536 dead transitions. [2024-06-20 16:49:21,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 536 transitions, 9309 flow [2024-06-20 16:49:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:21,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:21,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:49:21,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-20 16:49:21,068 INFO L175 Difference]: Start difference. First operand has 181 places, 474 transitions, 7638 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:49:21,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 536 transitions, 9309 flow [2024-06-20 16:49:21,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 536 transitions, 9077 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 16:49:21,280 INFO L231 Difference]: Finished difference. Result has 186 places, 497 transitions, 7980 flow [2024-06-20 16:49:21,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7419, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7980, PETRI_PLACES=186, PETRI_TRANSITIONS=497} [2024-06-20 16:49:21,280 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-20 16:49:21,280 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 497 transitions, 7980 flow [2024-06-20 16:49:21,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:21,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:21,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:21,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:49:21,281 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)] === [2024-06-20 16:49:21,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:21,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2046325769, now seen corresponding path program 7 times [2024-06-20 16:49:21,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:21,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182935027] [2024-06-20 16:49:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:21,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:22,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:22,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182935027] [2024-06-20 16:49:22,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182935027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:22,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:22,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:22,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451635153] [2024-06-20 16:49:22,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:22,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:22,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:22,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:22,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:22,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:22,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 497 transitions, 7980 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:22,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:22,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:22,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:23,408 INFO L124 PetriNetUnfolderBase]: 3330/4917 cut-off events. [2024-06-20 16:49:23,408 INFO L125 PetriNetUnfolderBase]: For 122237/122243 co-relation queries the response was YES. [2024-06-20 16:49:23,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40515 conditions, 4917 events. 3330/4917 cut-off events. For 122237/122243 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 24775 event pairs, 766 based on Foata normal form. 7/4924 useless extension candidates. Maximal degree in co-relation 40423. Up to 3758 conditions per place. [2024-06-20 16:49:23,452 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 241 selfloop transitions, 322 changer transitions 0/566 dead transitions. [2024-06-20 16:49:23,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 566 transitions, 10035 flow [2024-06-20 16:49:23,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:23,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:23,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 16:49:23,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-20 16:49:23,454 INFO L175 Difference]: Start difference. First operand has 186 places, 497 transitions, 7980 flow. Second operand 8 states and 150 transitions. [2024-06-20 16:49:23,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 566 transitions, 10035 flow [2024-06-20 16:49:23,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 566 transitions, 9879 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-20 16:49:23,666 INFO L231 Difference]: Finished difference. Result has 192 places, 519 transitions, 9180 flow [2024-06-20 16:49:23,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7824, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9180, PETRI_PLACES=192, PETRI_TRANSITIONS=519} [2024-06-20 16:49:23,667 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-20 16:49:23,667 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 519 transitions, 9180 flow [2024-06-20 16:49:23,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:23,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:23,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:23,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:49:23,667 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)] === [2024-06-20 16:49:23,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash -173290678, now seen corresponding path program 5 times [2024-06-20 16:49:23,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:23,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529098088] [2024-06-20 16:49:23,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:23,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:24,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:24,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529098088] [2024-06-20 16:49:24,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529098088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:24,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:24,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:24,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744164844] [2024-06-20 16:49:24,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:24,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:24,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:24,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:24,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:24,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:24,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 519 transitions, 9180 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:24,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:24,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:24,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:25,801 INFO L124 PetriNetUnfolderBase]: 3815/5623 cut-off events. [2024-06-20 16:49:25,801 INFO L125 PetriNetUnfolderBase]: For 157346/157348 co-relation queries the response was YES. [2024-06-20 16:49:25,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49858 conditions, 5623 events. 3815/5623 cut-off events. For 157346/157348 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 28918 event pairs, 1028 based on Foata normal form. 13/5636 useless extension candidates. Maximal degree in co-relation 49764. Up to 4570 conditions per place. [2024-06-20 16:49:25,864 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 446 selfloop transitions, 254 changer transitions 0/703 dead transitions. [2024-06-20 16:49:25,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 703 transitions, 13972 flow [2024-06-20 16:49:25,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:25,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 16:49:25,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 16:49:25,865 INFO L175 Difference]: Start difference. First operand has 192 places, 519 transitions, 9180 flow. Second operand 9 states and 154 transitions. [2024-06-20 16:49:25,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 703 transitions, 13972 flow [2024-06-20 16:49:26,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 703 transitions, 13762 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:26,167 INFO L231 Difference]: Finished difference. Result has 199 places, 643 transitions, 12485 flow [2024-06-20 16:49:26,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9024, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12485, PETRI_PLACES=199, PETRI_TRANSITIONS=643} [2024-06-20 16:49:26,168 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-20 16:49:26,168 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 643 transitions, 12485 flow [2024-06-20 16:49:26,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:26,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:26,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:26,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:49:26,168 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)] === [2024-06-20 16:49:26,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:26,169 INFO L85 PathProgramCache]: Analyzing trace with hash 665977703, now seen corresponding path program 8 times [2024-06-20 16:49:26,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:26,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546670217] [2024-06-20 16:49:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:26,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:27,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:27,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546670217] [2024-06-20 16:49:27,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546670217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:27,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:27,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:27,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952644498] [2024-06-20 16:49:27,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:27,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:27,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:27,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:27,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:27,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:27,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 643 transitions, 12485 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:27,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:27,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:27,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:28,416 INFO L124 PetriNetUnfolderBase]: 3738/5508 cut-off events. [2024-06-20 16:49:28,417 INFO L125 PetriNetUnfolderBase]: For 143230/143240 co-relation queries the response was YES. [2024-06-20 16:49:28,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49849 conditions, 5508 events. 3738/5508 cut-off events. For 143230/143240 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 28200 event pairs, 803 based on Foata normal form. 30/5538 useless extension candidates. Maximal degree in co-relation 49752. Up to 4522 conditions per place. [2024-06-20 16:49:28,472 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 392 selfloop transitions, 299 changer transitions 0/694 dead transitions. [2024-06-20 16:49:28,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 694 transitions, 14415 flow [2024-06-20 16:49:28,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:49:28,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-20 16:49:28,473 INFO L175 Difference]: Start difference. First operand has 199 places, 643 transitions, 12485 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:49:28,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 694 transitions, 14415 flow [2024-06-20 16:49:28,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 694 transitions, 13921 flow, removed 143 selfloop flow, removed 4 redundant places. [2024-06-20 16:49:28,798 INFO L231 Difference]: Finished difference. Result has 203 places, 643 transitions, 12691 flow [2024-06-20 16:49:28,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11991, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12691, PETRI_PLACES=203, PETRI_TRANSITIONS=643} [2024-06-20 16:49:28,799 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-20 16:49:28,799 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 643 transitions, 12691 flow [2024-06-20 16:49:28,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:28,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:28,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:28,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:49:28,799 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)] === [2024-06-20 16:49:28,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:28,800 INFO L85 PathProgramCache]: Analyzing trace with hash 669696928, now seen corresponding path program 6 times [2024-06-20 16:49:28,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:28,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831397209] [2024-06-20 16:49:28,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:28,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:29,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:29,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831397209] [2024-06-20 16:49:29,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831397209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:29,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:29,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:29,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000476121] [2024-06-20 16:49:29,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:29,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:29,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:29,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:29,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:29,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:29,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 643 transitions, 12691 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:29,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:29,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:29,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:31,020 INFO L124 PetriNetUnfolderBase]: 4109/6052 cut-off events. [2024-06-20 16:49:31,020 INFO L125 PetriNetUnfolderBase]: For 171221/171227 co-relation queries the response was YES. [2024-06-20 16:49:31,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56317 conditions, 6052 events. 4109/6052 cut-off events. For 171221/171227 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 31598 event pairs, 923 based on Foata normal form. 19/6071 useless extension candidates. Maximal degree in co-relation 56219. Up to 5169 conditions per place. [2024-06-20 16:49:31,087 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 538 selfloop transitions, 229 changer transitions 0/770 dead transitions. [2024-06-20 16:49:31,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 770 transitions, 16616 flow [2024-06-20 16:49:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 16:49:31,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-20 16:49:31,088 INFO L175 Difference]: Start difference. First operand has 203 places, 643 transitions, 12691 flow. Second operand 8 states and 143 transitions. [2024-06-20 16:49:31,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 770 transitions, 16616 flow [2024-06-20 16:49:31,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 770 transitions, 16054 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:31,483 INFO L231 Difference]: Finished difference. Result has 207 places, 713 transitions, 14547 flow [2024-06-20 16:49:31,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12203, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14547, PETRI_PLACES=207, PETRI_TRANSITIONS=713} [2024-06-20 16:49:31,484 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-20 16:49:31,484 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 713 transitions, 14547 flow [2024-06-20 16:49:31,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:31,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:31,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:31,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:49:31,484 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)] === [2024-06-20 16:49:31,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:31,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1541629147, now seen corresponding path program 9 times [2024-06-20 16:49:31,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:31,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943002636] [2024-06-20 16:49:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:31,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:32,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:32,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943002636] [2024-06-20 16:49:32,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943002636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:32,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:32,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:32,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095874919] [2024-06-20 16:49:32,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:32,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:32,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:32,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:32,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:32,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:32,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 713 transitions, 14547 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:32,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:32,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:32,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:33,976 INFO L124 PetriNetUnfolderBase]: 4034/5949 cut-off events. [2024-06-20 16:49:33,976 INFO L125 PetriNetUnfolderBase]: For 173491/173497 co-relation queries the response was YES. [2024-06-20 16:49:34,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55621 conditions, 5949 events. 4034/5949 cut-off events. For 173491/173497 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 31033 event pairs, 912 based on Foata normal form. 30/5979 useless extension candidates. Maximal degree in co-relation 55521. Up to 5193 conditions per place. [2024-06-20 16:49:34,036 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 539 selfloop transitions, 222 changer transitions 0/764 dead transitions. [2024-06-20 16:49:34,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 764 transitions, 16749 flow [2024-06-20 16:49:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:34,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:49:34,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-20 16:49:34,037 INFO L175 Difference]: Start difference. First operand has 207 places, 713 transitions, 14547 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:49:34,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 764 transitions, 16749 flow [2024-06-20 16:49:34,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 764 transitions, 16296 flow, removed 165 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:34,491 INFO L231 Difference]: Finished difference. Result has 211 places, 719 transitions, 14888 flow [2024-06-20 16:49:34,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14102, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14888, PETRI_PLACES=211, PETRI_TRANSITIONS=719} [2024-06-20 16:49:34,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-20 16:49:34,492 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 719 transitions, 14888 flow [2024-06-20 16:49:34,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:34,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:34,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:34,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:49:34,493 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)] === [2024-06-20 16:49:34,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:34,493 INFO L85 PathProgramCache]: Analyzing trace with hash -2042510754, now seen corresponding path program 7 times [2024-06-20 16:49:34,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:34,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563107990] [2024-06-20 16:49:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:34,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:35,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:35,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563107990] [2024-06-20 16:49:35,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563107990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:35,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:35,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:35,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735871270] [2024-06-20 16:49:35,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:35,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:35,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:35,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:35,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:35,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:35,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 719 transitions, 14888 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:35,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:35,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:35,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:36,768 INFO L124 PetriNetUnfolderBase]: 3988/5885 cut-off events. [2024-06-20 16:49:36,768 INFO L125 PetriNetUnfolderBase]: For 164892/164898 co-relation queries the response was YES. [2024-06-20 16:49:36,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55228 conditions, 5885 events. 3988/5885 cut-off events. For 164892/164898 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 30667 event pairs, 908 based on Foata normal form. 12/5897 useless extension candidates. Maximal degree in co-relation 55126. Up to 5073 conditions per place. [2024-06-20 16:49:36,838 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 533 selfloop transitions, 244 changer transitions 0/780 dead transitions. [2024-06-20 16:49:36,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 780 transitions, 17067 flow [2024-06-20 16:49:36,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:49:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:49:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-20 16:49:36,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2024-06-20 16:49:36,840 INFO L175 Difference]: Start difference. First operand has 211 places, 719 transitions, 14888 flow. Second operand 10 states and 169 transitions. [2024-06-20 16:49:36,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 780 transitions, 17067 flow [2024-06-20 16:49:37,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 780 transitions, 16564 flow, removed 115 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:37,436 INFO L231 Difference]: Finished difference. Result has 216 places, 721 transitions, 14985 flow [2024-06-20 16:49:37,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14399, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14985, PETRI_PLACES=216, PETRI_TRANSITIONS=721} [2024-06-20 16:49:37,437 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-20 16:49:37,437 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 721 transitions, 14985 flow [2024-06-20 16:49:37,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:37,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:37,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:37,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:49:37,438 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)] === [2024-06-20 16:49:37,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:37,438 INFO L85 PathProgramCache]: Analyzing trace with hash -836876210, now seen corresponding path program 8 times [2024-06-20 16:49:37,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:37,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225740395] [2024-06-20 16:49:37,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:37,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:38,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:38,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225740395] [2024-06-20 16:49:38,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225740395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:38,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:38,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:38,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894765193] [2024-06-20 16:49:38,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:38,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:38,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:38,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:38,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:38,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:38,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 721 transitions, 14985 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:38,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:38,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:38,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:39,657 INFO L124 PetriNetUnfolderBase]: 4134/6100 cut-off events. [2024-06-20 16:49:39,657 INFO L125 PetriNetUnfolderBase]: For 179072/179080 co-relation queries the response was YES. [2024-06-20 16:49:39,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58061 conditions, 6100 events. 4134/6100 cut-off events. For 179072/179080 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 31976 event pairs, 689 based on Foata normal form. 12/6112 useless extension candidates. Maximal degree in co-relation 57958. Up to 5297 conditions per place. [2024-06-20 16:49:39,719 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 626 selfloop transitions, 184 changer transitions 0/813 dead transitions. [2024-06-20 16:49:39,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 813 transitions, 18241 flow [2024-06-20 16:49:39,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:39,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:49:39,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-20 16:49:39,721 INFO L175 Difference]: Start difference. First operand has 216 places, 721 transitions, 14985 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:49:39,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 813 transitions, 18241 flow [2024-06-20 16:49:40,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 813 transitions, 17731 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-20 16:49:40,185 INFO L231 Difference]: Finished difference. Result has 216 places, 759 transitions, 16004 flow [2024-06-20 16:49:40,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14483, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16004, PETRI_PLACES=216, PETRI_TRANSITIONS=759} [2024-06-20 16:49:40,185 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-20 16:49:40,186 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 759 transitions, 16004 flow [2024-06-20 16:49:40,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:40,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:40,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:40,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:49:40,186 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)] === [2024-06-20 16:49:40,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:40,186 INFO L85 PathProgramCache]: Analyzing trace with hash -836881945, now seen corresponding path program 10 times [2024-06-20 16:49:40,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:40,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041798613] [2024-06-20 16:49:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:40,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:41,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:41,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041798613] [2024-06-20 16:49:41,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041798613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:41,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:41,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:41,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602551539] [2024-06-20 16:49:41,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:41,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:41,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:41,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:41,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:41,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:41,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 759 transitions, 16004 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:41,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:41,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:41,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:42,733 INFO L124 PetriNetUnfolderBase]: 4100/6059 cut-off events. [2024-06-20 16:49:42,733 INFO L125 PetriNetUnfolderBase]: For 175278/175288 co-relation queries the response was YES. [2024-06-20 16:49:42,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57636 conditions, 6059 events. 4100/6059 cut-off events. For 175278/175288 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 31932 event pairs, 839 based on Foata normal form. 27/6086 useless extension candidates. Maximal degree in co-relation 57532. Up to 5336 conditions per place. [2024-06-20 16:49:42,801 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 606 selfloop transitions, 196 changer transitions 0/805 dead transitions. [2024-06-20 16:49:42,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 805 transitions, 18141 flow [2024-06-20 16:49:42,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-20 16:49:42,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-20 16:49:42,802 INFO L175 Difference]: Start difference. First operand has 216 places, 759 transitions, 16004 flow. Second operand 7 states and 134 transitions. [2024-06-20 16:49:42,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 805 transitions, 18141 flow [2024-06-20 16:49:43,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 805 transitions, 17208 flow, removed 204 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:43,383 INFO L231 Difference]: Finished difference. Result has 218 places, 759 transitions, 15554 flow [2024-06-20 16:49:43,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15071, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15554, PETRI_PLACES=218, PETRI_TRANSITIONS=759} [2024-06-20 16:49:43,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-20 16:49:43,383 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 759 transitions, 15554 flow [2024-06-20 16:49:43,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:43,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:43,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:43,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:49:43,384 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)] === [2024-06-20 16:49:43,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:43,385 INFO L85 PathProgramCache]: Analyzing trace with hash -836881790, now seen corresponding path program 9 times [2024-06-20 16:49:43,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:43,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670438276] [2024-06-20 16:49:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:43,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:44,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:44,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670438276] [2024-06-20 16:49:44,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670438276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:44,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:44,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:44,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627826102] [2024-06-20 16:49:44,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:44,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:44,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:44,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:44,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:44,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:44,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 759 transitions, 15554 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:44,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:44,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:44,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:45,593 INFO L124 PetriNetUnfolderBase]: 4053/5993 cut-off events. [2024-06-20 16:49:45,593 INFO L125 PetriNetUnfolderBase]: For 171927/171927 co-relation queries the response was YES. [2024-06-20 16:49:45,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55381 conditions, 5993 events. 4053/5993 cut-off events. For 171927/171927 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 31486 event pairs, 1095 based on Foata normal form. 17/6010 useless extension candidates. Maximal degree in co-relation 55278. Up to 5378 conditions per place. [2024-06-20 16:49:45,659 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 660 selfloop transitions, 139 changer transitions 0/802 dead transitions. [2024-06-20 16:49:45,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 802 transitions, 17687 flow [2024-06-20 16:49:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 16:49:45,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:49:45,661 INFO L175 Difference]: Start difference. First operand has 218 places, 759 transitions, 15554 flow. Second operand 9 states and 144 transitions. [2024-06-20 16:49:45,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 802 transitions, 17687 flow [2024-06-20 16:49:46,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 802 transitions, 16605 flow, removed 114 selfloop flow, removed 7 redundant places. [2024-06-20 16:49:46,112 INFO L231 Difference]: Finished difference. Result has 220 places, 759 transitions, 14787 flow [2024-06-20 16:49:46,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14472, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14787, PETRI_PLACES=220, PETRI_TRANSITIONS=759} [2024-06-20 16:49:46,113 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-20 16:49:46,114 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 759 transitions, 14787 flow [2024-06-20 16:49:46,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:46,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:46,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:46,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:49:46,114 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)] === [2024-06-20 16:49:46,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:46,115 INFO L85 PathProgramCache]: Analyzing trace with hash 674644957, now seen corresponding path program 1 times [2024-06-20 16:49:46,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:46,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391214668] [2024-06-20 16:49:46,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:46,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:46,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:46,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391214668] [2024-06-20 16:49:46,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391214668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:46,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:46,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:46,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609295910] [2024-06-20 16:49:46,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:46,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:46,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:46,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:46,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:46,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:46,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 759 transitions, 14787 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:46,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:46,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:46,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:48,230 INFO L124 PetriNetUnfolderBase]: 4045/5981 cut-off events. [2024-06-20 16:49:48,230 INFO L125 PetriNetUnfolderBase]: For 164615/164619 co-relation queries the response was YES. [2024-06-20 16:49:48,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53909 conditions, 5981 events. 4045/5981 cut-off events. For 164615/164619 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 31421 event pairs, 1141 based on Foata normal form. 7/5988 useless extension candidates. Maximal degree in co-relation 53806. Up to 5822 conditions per place. [2024-06-20 16:49:48,298 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 742 selfloop transitions, 32 changer transitions 0/777 dead transitions. [2024-06-20 16:49:48,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 777 transitions, 16464 flow [2024-06-20 16:49:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:49:48,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:49:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-20 16:49:48,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-20 16:49:48,299 INFO L175 Difference]: Start difference. First operand has 220 places, 759 transitions, 14787 flow. Second operand 6 states and 98 transitions. [2024-06-20 16:49:48,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 777 transitions, 16464 flow [2024-06-20 16:49:48,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 777 transitions, 16200 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:48,893 INFO L231 Difference]: Finished difference. Result has 221 places, 760 transitions, 14646 flow [2024-06-20 16:49:48,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14529, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14646, PETRI_PLACES=221, PETRI_TRANSITIONS=760} [2024-06-20 16:49:48,894 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-20 16:49:48,894 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 760 transitions, 14646 flow [2024-06-20 16:49:48,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:48,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:48,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:48,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:49:48,894 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)] === [2024-06-20 16:49:48,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:48,895 INFO L85 PathProgramCache]: Analyzing trace with hash -829524560, now seen corresponding path program 10 times [2024-06-20 16:49:48,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:48,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971769693] [2024-06-20 16:49:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:48,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:49,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:49,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971769693] [2024-06-20 16:49:49,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971769693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:49,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:49,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:49,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919122430] [2024-06-20 16:49:49,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:49,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:49,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:49,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:49,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:49,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:49,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 760 transitions, 14646 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:49,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:49,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:49,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:51,137 INFO L124 PetriNetUnfolderBase]: 3999/5916 cut-off events. [2024-06-20 16:49:51,137 INFO L125 PetriNetUnfolderBase]: For 160460/160464 co-relation queries the response was YES. [2024-06-20 16:49:51,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52511 conditions, 5916 events. 3999/5916 cut-off events. For 160460/160464 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 31062 event pairs, 1134 based on Foata normal form. 14/5930 useless extension candidates. Maximal degree in co-relation 52406. Up to 5717 conditions per place. [2024-06-20 16:49:51,194 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 742 selfloop transitions, 46 changer transitions 0/791 dead transitions. [2024-06-20 16:49:51,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 791 transitions, 16562 flow [2024-06-20 16:49:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:51,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 16:49:51,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-20 16:49:51,196 INFO L175 Difference]: Start difference. First operand has 221 places, 760 transitions, 14646 flow. Second operand 7 states and 113 transitions. [2024-06-20 16:49:51,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 791 transitions, 16562 flow [2024-06-20 16:49:51,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 791 transitions, 16522 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:51,586 INFO L231 Difference]: Finished difference. Result has 225 places, 766 transitions, 14913 flow [2024-06-20 16:49:51,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14606, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14913, PETRI_PLACES=225, PETRI_TRANSITIONS=766} [2024-06-20 16:49:51,586 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-20 16:49:51,586 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 766 transitions, 14913 flow [2024-06-20 16:49:51,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:51,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:51,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:51,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:49:51,587 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)] === [2024-06-20 16:49:51,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:51,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1888945963, now seen corresponding path program 1 times [2024-06-20 16:49:51,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:51,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383470672] [2024-06-20 16:49:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:51,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:52,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:52,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383470672] [2024-06-20 16:49:52,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383470672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:52,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:52,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:52,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897214247] [2024-06-20 16:49:52,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:52,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:52,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:52,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:52,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:52,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:52,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 766 transitions, 14913 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:52,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:52,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:52,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:53,973 INFO L124 PetriNetUnfolderBase]: 4240/6295 cut-off events. [2024-06-20 16:49:53,974 INFO L125 PetriNetUnfolderBase]: For 179051/179067 co-relation queries the response was YES. [2024-06-20 16:49:54,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56016 conditions, 6295 events. 4240/6295 cut-off events. For 179051/179067 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 33601 event pairs, 623 based on Foata normal form. 12/6307 useless extension candidates. Maximal degree in co-relation 55909. Up to 4675 conditions per place. [2024-06-20 16:49:54,036 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 512 selfloop transitions, 326 changer transitions 0/841 dead transitions. [2024-06-20 16:49:54,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 841 transitions, 17547 flow [2024-06-20 16:49:54,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:49:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:49:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-20 16:49:54,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-06-20 16:49:54,037 INFO L175 Difference]: Start difference. First operand has 225 places, 766 transitions, 14913 flow. Second operand 10 states and 188 transitions. [2024-06-20 16:49:54,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 841 transitions, 17547 flow [2024-06-20 16:49:54,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 841 transitions, 17360 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-20 16:49:54,571 INFO L231 Difference]: Finished difference. Result has 234 places, 790 transitions, 16119 flow [2024-06-20 16:49:54,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14726, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16119, PETRI_PLACES=234, PETRI_TRANSITIONS=790} [2024-06-20 16:49:54,572 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-20 16:49:54,572 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 790 transitions, 16119 flow [2024-06-20 16:49:54,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:54,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:54,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:54,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:49:54,572 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)] === [2024-06-20 16:49:54,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1103055795, now seen corresponding path program 2 times [2024-06-20 16:49:54,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:54,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444580171] [2024-06-20 16:49:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:54,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:55,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:55,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444580171] [2024-06-20 16:49:55,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444580171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:55,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:55,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:55,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958277611] [2024-06-20 16:49:55,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:55,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:55,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:55,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:55,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:55,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:49:55,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 790 transitions, 16119 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) [2024-06-20 16:49:55,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:55,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:49:55,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:57,137 INFO L124 PetriNetUnfolderBase]: 4450/6764 cut-off events. [2024-06-20 16:49:57,137 INFO L125 PetriNetUnfolderBase]: For 244088/244270 co-relation queries the response was YES. [2024-06-20 16:49:57,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62788 conditions, 6764 events. 4450/6764 cut-off events. For 244088/244270 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 38766 event pairs, 924 based on Foata normal form. 83/6817 useless extension candidates. Maximal degree in co-relation 62676. Up to 3886 conditions per place. [2024-06-20 16:49:57,216 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 279 selfloop transitions, 500 changer transitions 0/862 dead transitions. [2024-06-20 16:49:57,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 862 transitions, 18667 flow [2024-06-20 16:49:57,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 16:49:57,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-20 16:49:57,218 INFO L175 Difference]: Start difference. First operand has 234 places, 790 transitions, 16119 flow. Second operand 9 states and 175 transitions. [2024-06-20 16:49:57,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 862 transitions, 18667 flow [2024-06-20 16:49:57,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 862 transitions, 18505 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:57,864 INFO L231 Difference]: Finished difference. Result has 241 places, 801 transitions, 17339 flow [2024-06-20 16:49:57,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16019, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17339, PETRI_PLACES=241, PETRI_TRANSITIONS=801} [2024-06-20 16:49:57,865 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-20 16:49:57,865 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 801 transitions, 17339 flow [2024-06-20 16:49:57,866 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) [2024-06-20 16:49:57,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:57,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:57,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:49:57,866 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)] === [2024-06-20 16:49:57,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:57,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1739310323, now seen corresponding path program 3 times [2024-06-20 16:49:57,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:57,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669436043] [2024-06-20 16:49:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:57,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:58,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:58,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669436043] [2024-06-20 16:49:58,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669436043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:58,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:58,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:58,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206632757] [2024-06-20 16:49:58,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:58,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:58,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:58,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:58,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:58,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:49:58,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 801 transitions, 17339 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) [2024-06-20 16:49:58,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:58,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:49:58,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:00,655 INFO L124 PetriNetUnfolderBase]: 4481/6816 cut-off events. [2024-06-20 16:50:00,656 INFO L125 PetriNetUnfolderBase]: For 264520/264661 co-relation queries the response was YES. [2024-06-20 16:50:00,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64312 conditions, 6816 events. 4481/6816 cut-off events. For 264520/264661 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 39125 event pairs, 909 based on Foata normal form. 105/6891 useless extension candidates. Maximal degree in co-relation 64198. Up to 4544 conditions per place. [2024-06-20 16:50:00,739 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 276 selfloop transitions, 502 changer transitions 0/861 dead transitions. [2024-06-20 16:50:00,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 861 transitions, 19591 flow [2024-06-20 16:50:00,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:50:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:50:00,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 16:50:00,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-20 16:50:00,741 INFO L175 Difference]: Start difference. First operand has 241 places, 801 transitions, 17339 flow. Second operand 9 states and 171 transitions. [2024-06-20 16:50:00,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 861 transitions, 19591 flow [2024-06-20 16:50:01,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 861 transitions, 19034 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:50:01,420 INFO L231 Difference]: Finished difference. Result has 245 places, 803 transitions, 17878 flow [2024-06-20 16:50:01,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16784, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=500, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17878, PETRI_PLACES=245, PETRI_TRANSITIONS=803} [2024-06-20 16:50:01,421 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-20 16:50:01,421 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 803 transitions, 17878 flow [2024-06-20 16:50:01,421 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) [2024-06-20 16:50:01,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:01,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:01,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:50:01,421 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:01,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:01,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1666932139, now seen corresponding path program 1 times [2024-06-20 16:50:01,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:01,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91916725] [2024-06-20 16:50:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:01,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:02,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:02,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91916725] [2024-06-20 16:50:02,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91916725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:02,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:02,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:02,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884516812] [2024-06-20 16:50:02,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:02,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:02,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:02,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:02,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:02,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:02,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 803 transitions, 17878 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) [2024-06-20 16:50:02,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:02,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:02,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:04,392 INFO L124 PetriNetUnfolderBase]: 5444/8243 cut-off events. [2024-06-20 16:50:04,392 INFO L125 PetriNetUnfolderBase]: For 303275/303287 co-relation queries the response was YES. [2024-06-20 16:50:04,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77456 conditions, 8243 events. 5444/8243 cut-off events. For 303275/303287 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 48012 event pairs, 1050 based on Foata normal form. 22/8265 useless extension candidates. Maximal degree in co-relation 77340. Up to 5031 conditions per place. [2024-06-20 16:50:04,505 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 393 selfloop transitions, 501 changer transitions 0/897 dead transitions. [2024-06-20 16:50:04,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 897 transitions, 21099 flow [2024-06-20 16:50:04,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:50:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:50:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-20 16:50:04,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-20 16:50:04,506 INFO L175 Difference]: Start difference. First operand has 245 places, 803 transitions, 17878 flow. Second operand 10 states and 190 transitions. [2024-06-20 16:50:04,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 897 transitions, 21099 flow [2024-06-20 16:50:05,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 897 transitions, 20110 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:05,469 INFO L231 Difference]: Finished difference. Result has 250 places, 825 transitions, 18464 flow [2024-06-20 16:50:05,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16897, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=482, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18464, PETRI_PLACES=250, PETRI_TRANSITIONS=825} [2024-06-20 16:50:05,470 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-20 16:50:05,470 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 825 transitions, 18464 flow [2024-06-20 16:50:05,471 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) [2024-06-20 16:50:05,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:05,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:05,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:50:05,471 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)] === [2024-06-20 16:50:05,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:05,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1993434607, now seen corresponding path program 4 times [2024-06-20 16:50:05,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:05,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746817282] [2024-06-20 16:50:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:05,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:06,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:06,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:06,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746817282] [2024-06-20 16:50:06,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746817282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:06,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:06,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:06,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325863888] [2024-06-20 16:50:06,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:06,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:06,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:06,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:06,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:06,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:06,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 825 transitions, 18464 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:06,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:06,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:06,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:08,956 INFO L124 PetriNetUnfolderBase]: 5662/8567 cut-off events. [2024-06-20 16:50:08,956 INFO L125 PetriNetUnfolderBase]: For 336425/336436 co-relation queries the response was YES. [2024-06-20 16:50:09,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81042 conditions, 8567 events. 5662/8567 cut-off events. For 336425/336436 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 50225 event pairs, 1312 based on Foata normal form. 28/8595 useless extension candidates. Maximal degree in co-relation 80923. Up to 7377 conditions per place. [2024-06-20 16:50:09,070 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 702 selfloop transitions, 203 changer transitions 0/908 dead transitions. [2024-06-20 16:50:09,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 908 transitions, 21359 flow [2024-06-20 16:50:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:50:09,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:50:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-20 16:50:09,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825 [2024-06-20 16:50:09,071 INFO L175 Difference]: Start difference. First operand has 250 places, 825 transitions, 18464 flow. Second operand 10 states and 193 transitions. [2024-06-20 16:50:09,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 908 transitions, 21359 flow [2024-06-20 16:50:10,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 908 transitions, 20837 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-20 16:50:10,230 INFO L231 Difference]: Finished difference. Result has 258 places, 847 transitions, 18953 flow [2024-06-20 16:50:10,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17948, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18953, PETRI_PLACES=258, PETRI_TRANSITIONS=847} [2024-06-20 16:50:10,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-20 16:50:10,232 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 847 transitions, 18953 flow [2024-06-20 16:50:10,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:10,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:10,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:10,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:50:10,232 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)] === [2024-06-20 16:50:10,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:10,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1993495057, now seen corresponding path program 5 times [2024-06-20 16:50:10,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:10,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974977898] [2024-06-20 16:50:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:10,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:11,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:11,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974977898] [2024-06-20 16:50:11,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974977898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:11,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:11,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:11,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924914390] [2024-06-20 16:50:11,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:11,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:11,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:11,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:11,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:11,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:11,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 847 transitions, 18953 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:11,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:11,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:11,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:13,928 INFO L124 PetriNetUnfolderBase]: 5771/8735 cut-off events. [2024-06-20 16:50:13,929 INFO L125 PetriNetUnfolderBase]: For 352744/352755 co-relation queries the response was YES. [2024-06-20 16:50:13,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84878 conditions, 8735 events. 5771/8735 cut-off events. For 352744/352755 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 51412 event pairs, 1413 based on Foata normal form. 33/8768 useless extension candidates. Maximal degree in co-relation 84755. Up to 7899 conditions per place. [2024-06-20 16:50:14,024 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 714 selfloop transitions, 196 changer transitions 0/913 dead transitions. [2024-06-20 16:50:14,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 913 transitions, 21576 flow [2024-06-20 16:50:14,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:50:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:50:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-20 16:50:14,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-06-20 16:50:14,025 INFO L175 Difference]: Start difference. First operand has 258 places, 847 transitions, 18953 flow. Second operand 10 states and 188 transitions. [2024-06-20 16:50:14,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 913 transitions, 21576 flow [2024-06-20 16:50:14,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 913 transitions, 21442 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 16:50:14,978 INFO L231 Difference]: Finished difference. Result has 266 places, 860 transitions, 19637 flow [2024-06-20 16:50:14,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18837, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19637, PETRI_PLACES=266, PETRI_TRANSITIONS=860} [2024-06-20 16:50:14,979 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-20 16:50:14,979 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 860 transitions, 19637 flow [2024-06-20 16:50:14,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:14,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:14,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:14,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:50:14,979 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)] === [2024-06-20 16:50:14,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:14,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1996291567, now seen corresponding path program 6 times [2024-06-20 16:50:14,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:14,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897287815] [2024-06-20 16:50:14,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:14,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:15,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:15,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897287815] [2024-06-20 16:50:15,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897287815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:15,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:15,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:15,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733386814] [2024-06-20 16:50:15,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:15,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:15,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:15,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:15,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:15,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:15,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 860 transitions, 19637 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:15,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:15,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:15,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:18,526 INFO L124 PetriNetUnfolderBase]: 5882/8904 cut-off events. [2024-06-20 16:50:18,526 INFO L125 PetriNetUnfolderBase]: For 385133/385144 co-relation queries the response was YES. [2024-06-20 16:50:18,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87931 conditions, 8904 events. 5882/8904 cut-off events. For 385133/385144 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 52487 event pairs, 1469 based on Foata normal form. 38/8942 useless extension candidates. Maximal degree in co-relation 87804. Up to 8176 conditions per place. [2024-06-20 16:50:18,638 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 777 selfloop transitions, 141 changer transitions 0/921 dead transitions. [2024-06-20 16:50:18,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 921 transitions, 22147 flow [2024-06-20 16:50:18,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:50:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:50:18,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-20 16:50:18,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-20 16:50:18,640 INFO L175 Difference]: Start difference. First operand has 266 places, 860 transitions, 19637 flow. Second operand 10 states and 185 transitions. [2024-06-20 16:50:18,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 921 transitions, 22147 flow [2024-06-20 16:50:19,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 921 transitions, 21728 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:19,777 INFO L231 Difference]: Finished difference. Result has 269 places, 868 transitions, 19737 flow [2024-06-20 16:50:19,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19218, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19737, PETRI_PLACES=269, PETRI_TRANSITIONS=868} [2024-06-20 16:50:19,778 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-20 16:50:19,778 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 868 transitions, 19737 flow [2024-06-20 16:50:19,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:19,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:19,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:19,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:50:19,778 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)] === [2024-06-20 16:50:19,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:19,779 INFO L85 PathProgramCache]: Analyzing trace with hash -151472363, now seen corresponding path program 7 times [2024-06-20 16:50:19,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:19,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111612633] [2024-06-20 16:50:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:19,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:20,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:20,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111612633] [2024-06-20 16:50:20,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111612633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:20,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:20,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:20,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903182901] [2024-06-20 16:50:20,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:20,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:20,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:20,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:20,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:20,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:20,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 868 transitions, 19737 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:20,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:20,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:20,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:23,335 INFO L124 PetriNetUnfolderBase]: 5952/9018 cut-off events. [2024-06-20 16:50:23,335 INFO L125 PetriNetUnfolderBase]: For 400195/400202 co-relation queries the response was YES. [2024-06-20 16:50:23,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88959 conditions, 9018 events. 5952/9018 cut-off events. For 400195/400202 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 53350 event pairs, 1657 based on Foata normal form. 34/9052 useless extension candidates. Maximal degree in co-relation 88831. Up to 8561 conditions per place. [2024-06-20 16:50:23,451 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 840 selfloop transitions, 78 changer transitions 0/921 dead transitions. [2024-06-20 16:50:23,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 921 transitions, 22079 flow [2024-06-20 16:50:23,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:50:23,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:50:23,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-20 16:50:23,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2024-06-20 16:50:23,452 INFO L175 Difference]: Start difference. First operand has 269 places, 868 transitions, 19737 flow. Second operand 10 states and 181 transitions. [2024-06-20 16:50:23,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 921 transitions, 22079 flow [2024-06-20 16:50:24,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 921 transitions, 21789 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:24,662 INFO L231 Difference]: Finished difference. Result has 272 places, 873 transitions, 19755 flow [2024-06-20 16:50:24,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19447, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19755, PETRI_PLACES=272, PETRI_TRANSITIONS=873} [2024-06-20 16:50:24,663 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-20 16:50:24,663 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 873 transitions, 19755 flow [2024-06-20 16:50:24,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:24,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:24,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:24,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:50:24,665 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:24,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:24,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2111767435, now seen corresponding path program 1 times [2024-06-20 16:50:24,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:24,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58512356] [2024-06-20 16:50:24,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:24,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:25,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:25,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58512356] [2024-06-20 16:50:25,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58512356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:25,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:25,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:25,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862431474] [2024-06-20 16:50:25,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:25,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:25,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:25,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:25,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:25,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:25,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 873 transitions, 19755 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:25,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:25,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:25,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:28,363 INFO L124 PetriNetUnfolderBase]: 5969/9043 cut-off events. [2024-06-20 16:50:28,363 INFO L125 PetriNetUnfolderBase]: For 398062/398067 co-relation queries the response was YES. [2024-06-20 16:50:28,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89335 conditions, 9043 events. 5969/9043 cut-off events. For 398062/398067 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 53526 event pairs, 1633 based on Foata normal form. 6/9049 useless extension candidates. Maximal degree in co-relation 89206. Up to 8693 conditions per place. [2024-06-20 16:50:28,467 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 808 selfloop transitions, 94 changer transitions 0/905 dead transitions. [2024-06-20 16:50:28,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 905 transitions, 21741 flow [2024-06-20 16:50:28,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:50:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:50:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:50:28,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-20 16:50:28,468 INFO L175 Difference]: Start difference. First operand has 272 places, 873 transitions, 19755 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:50:28,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 905 transitions, 21741 flow [2024-06-20 16:50:29,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 905 transitions, 21566 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:29,638 INFO L231 Difference]: Finished difference. Result has 274 places, 875 transitions, 19816 flow [2024-06-20 16:50:29,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19580, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19816, PETRI_PLACES=274, PETRI_TRANSITIONS=875} [2024-06-20 16:50:29,639 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-20 16:50:29,639 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 875 transitions, 19816 flow [2024-06-20 16:50:29,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:29,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:29,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:29,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:50:29,640 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:29,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:29,640 INFO L85 PathProgramCache]: Analyzing trace with hash 988351493, now seen corresponding path program 8 times [2024-06-20 16:50:29,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:29,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128727740] [2024-06-20 16:50:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:29,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:30,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:30,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128727740] [2024-06-20 16:50:30,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128727740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:30,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:30,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:30,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691164089] [2024-06-20 16:50:30,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:30,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:30,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:30,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:30,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 875 transitions, 19816 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:30,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:30,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:30,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:33,369 INFO L124 PetriNetUnfolderBase]: 6277/9518 cut-off events. [2024-06-20 16:50:33,369 INFO L125 PetriNetUnfolderBase]: For 457596/457614 co-relation queries the response was YES. [2024-06-20 16:50:33,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94061 conditions, 9518 events. 6277/9518 cut-off events. For 457596/457614 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 57049 event pairs, 1100 based on Foata normal form. 34/9552 useless extension candidates. Maximal degree in co-relation 93931. Up to 7192 conditions per place. [2024-06-20 16:50:33,491 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 640 selfloop transitions, 338 changer transitions 0/981 dead transitions. [2024-06-20 16:50:33,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 981 transitions, 23545 flow [2024-06-20 16:50:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:50:33,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:50:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 16:50:33,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-20 16:50:33,504 INFO L175 Difference]: Start difference. First operand has 274 places, 875 transitions, 19816 flow. Second operand 9 states and 175 transitions. [2024-06-20 16:50:33,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 981 transitions, 23545 flow [2024-06-20 16:50:34,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 981 transitions, 23329 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:34,677 INFO L231 Difference]: Finished difference. Result has 278 places, 920 transitions, 21768 flow [2024-06-20 16:50:34,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19600, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21768, PETRI_PLACES=278, PETRI_TRANSITIONS=920} [2024-06-20 16:50:34,677 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 237 predicate places. [2024-06-20 16:50:34,678 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 920 transitions, 21768 flow [2024-06-20 16:50:34,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:34,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:34,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:34,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:50:34,678 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:34,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:34,679 INFO L85 PathProgramCache]: Analyzing trace with hash 988411943, now seen corresponding path program 9 times [2024-06-20 16:50:34,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:34,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416998669] [2024-06-20 16:50:34,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:34,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:35,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:35,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416998669] [2024-06-20 16:50:35,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416998669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:35,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:35,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:35,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215095094] [2024-06-20 16:50:35,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:35,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:35,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:35,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:35,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:35,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:35,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 920 transitions, 21768 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:35,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:35,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:35,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:38,623 INFO L124 PetriNetUnfolderBase]: 6383/9684 cut-off events. [2024-06-20 16:50:38,623 INFO L125 PetriNetUnfolderBase]: For 497751/497762 co-relation queries the response was YES. [2024-06-20 16:50:38,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99839 conditions, 9684 events. 6383/9684 cut-off events. For 497751/497762 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 58123 event pairs, 1587 based on Foata normal form. 35/9719 useless extension candidates. Maximal degree in co-relation 99706. Up to 8294 conditions per place. [2024-06-20 16:50:38,763 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 677 selfloop transitions, 314 changer transitions 0/994 dead transitions. [2024-06-20 16:50:38,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 994 transitions, 24641 flow [2024-06-20 16:50:38,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:50:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:50:38,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 16:50:38,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675 [2024-06-20 16:50:38,765 INFO L175 Difference]: Start difference. First operand has 278 places, 920 transitions, 21768 flow. Second operand 10 states and 187 transitions. [2024-06-20 16:50:38,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 994 transitions, 24641 flow [2024-06-20 16:50:40,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 994 transitions, 24420 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-20 16:50:40,408 INFO L231 Difference]: Finished difference. Result has 285 places, 932 transitions, 22761 flow [2024-06-20 16:50:40,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21567, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=22761, PETRI_PLACES=285, PETRI_TRANSITIONS=932} [2024-06-20 16:50:40,409 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-20 16:50:40,409 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 932 transitions, 22761 flow [2024-06-20 16:50:40,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:40,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:40,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:40,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:50:40,410 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:40,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:40,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1106499623, now seen corresponding path program 10 times [2024-06-20 16:50:40,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:40,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466694607] [2024-06-20 16:50:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:40,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:41,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:41,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466694607] [2024-06-20 16:50:41,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466694607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:41,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:41,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:41,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596572882] [2024-06-20 16:50:41,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:41,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:41,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:41,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:41,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:41,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:41,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 932 transitions, 22761 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:41,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:41,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:41,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:44,915 INFO L124 PetriNetUnfolderBase]: 6551/9940 cut-off events. [2024-06-20 16:50:44,915 INFO L125 PetriNetUnfolderBase]: For 534106/534113 co-relation queries the response was YES. [2024-06-20 16:50:45,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104477 conditions, 9940 events. 6551/9940 cut-off events. For 534106/534113 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 60000 event pairs, 1845 based on Foata normal form. 46/9986 useless extension candidates. Maximal degree in co-relation 104341. Up to 9258 conditions per place. [2024-06-20 16:50:45,056 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 871 selfloop transitions, 120 changer transitions 0/994 dead transitions. [2024-06-20 16:50:45,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 994 transitions, 25591 flow [2024-06-20 16:50:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:50:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:50:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:50:45,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:50:45,057 INFO L175 Difference]: Start difference. First operand has 285 places, 932 transitions, 22761 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:50:45,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 994 transitions, 25591 flow [2024-06-20 16:50:46,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 994 transitions, 24933 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-20 16:50:46,949 INFO L231 Difference]: Finished difference. Result has 286 places, 951 transitions, 22973 flow [2024-06-20 16:50:46,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=22123, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22973, PETRI_PLACES=286, PETRI_TRANSITIONS=951} [2024-06-20 16:50:46,950 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 245 predicate places. [2024-06-20 16:50:46,950 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 951 transitions, 22973 flow [2024-06-20 16:50:46,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:46,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:46,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:46,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:50:46,951 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:46,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:46,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1106684321, now seen corresponding path program 2 times [2024-06-20 16:50:46,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:46,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289153529] [2024-06-20 16:50:46,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:46,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:48,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:48,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289153529] [2024-06-20 16:50:48,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289153529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:48,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:48,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:48,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111856241] [2024-06-20 16:50:48,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:48,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:48,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:48,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:48,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:48,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:48,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 951 transitions, 22973 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:48,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:48,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:48,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:50,936 INFO L124 PetriNetUnfolderBase]: 6568/9965 cut-off events. [2024-06-20 16:50:50,936 INFO L125 PetriNetUnfolderBase]: For 519163/519168 co-relation queries the response was YES. [2024-06-20 16:50:51,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104659 conditions, 9965 events. 6568/9965 cut-off events. For 519163/519168 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 60134 event pairs, 1873 based on Foata normal form. 6/9971 useless extension candidates. Maximal degree in co-relation 104523. Up to 9579 conditions per place. [2024-06-20 16:50:51,093 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 885 selfloop transitions, 95 changer transitions 0/983 dead transitions. [2024-06-20 16:50:51,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 983 transitions, 25169 flow [2024-06-20 16:50:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:51,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:50:51,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-20 16:50:51,095 INFO L175 Difference]: Start difference. First operand has 286 places, 951 transitions, 22973 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:50:51,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 983 transitions, 25169 flow [2024-06-20 16:50:53,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 983 transitions, 24895 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-20 16:50:53,389 INFO L231 Difference]: Finished difference. Result has 288 places, 953 transitions, 22946 flow [2024-06-20 16:50:53,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=22699, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=951, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=856, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=22946, PETRI_PLACES=288, PETRI_TRANSITIONS=953} [2024-06-20 16:50:53,390 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 247 predicate places. [2024-06-20 16:50:53,390 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 953 transitions, 22946 flow [2024-06-20 16:50:53,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:53,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:53,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:53,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:50:53,391 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:53,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:53,391 INFO L85 PathProgramCache]: Analyzing trace with hash 63121551, now seen corresponding path program 3 times [2024-06-20 16:50:53,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:53,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131728671] [2024-06-20 16:50:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:53,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:54,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:54,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131728671] [2024-06-20 16:50:54,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131728671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:54,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:54,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:54,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424934224] [2024-06-20 16:50:54,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:54,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:54,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:54,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:54,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:54,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:54,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 953 transitions, 22946 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:54,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:54,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:54,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:57,541 INFO L124 PetriNetUnfolderBase]: 6585/9997 cut-off events. [2024-06-20 16:50:57,541 INFO L125 PetriNetUnfolderBase]: For 537512/537516 co-relation queries the response was YES. [2024-06-20 16:50:57,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104936 conditions, 9997 events. 6585/9997 cut-off events. For 537512/537516 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 60382 event pairs, 2336 based on Foata normal form. 8/10005 useless extension candidates. Maximal degree in co-relation 104799. Up to 9794 conditions per place. [2024-06-20 16:50:57,768 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 955 selfloop transitions, 17 changer transitions 0/975 dead transitions. [2024-06-20 16:50:57,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 975 transitions, 25032 flow [2024-06-20 16:50:57,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:50:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:50:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-20 16:50:57,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-20 16:50:57,780 INFO L175 Difference]: Start difference. First operand has 288 places, 953 transitions, 22946 flow. Second operand 7 states and 111 transitions. [2024-06-20 16:50:57,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 975 transitions, 25032 flow [2024-06-20 16:50:59,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 975 transitions, 24807 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 16:50:59,311 INFO L231 Difference]: Finished difference. Result has 289 places, 955 transitions, 22810 flow [2024-06-20 16:50:59,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=22725, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=936, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22810, PETRI_PLACES=289, PETRI_TRANSITIONS=955} [2024-06-20 16:50:59,312 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-20 16:50:59,312 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 955 transitions, 22810 flow [2024-06-20 16:50:59,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:59,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:59,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:59,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:50:59,312 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:59,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:59,313 INFO L85 PathProgramCache]: Analyzing trace with hash 54781311, now seen corresponding path program 4 times [2024-06-20 16:50:59,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:59,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986427053] [2024-06-20 16:50:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:59,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:00,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:00,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986427053] [2024-06-20 16:51:00,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986427053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:00,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:00,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:00,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753374507] [2024-06-20 16:51:00,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:00,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:00,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:00,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:00,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:00,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:00,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 955 transitions, 22810 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:00,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:00,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:00,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:03,576 INFO L124 PetriNetUnfolderBase]: 6602/10028 cut-off events. [2024-06-20 16:51:03,576 INFO L125 PetriNetUnfolderBase]: For 536331/536335 co-relation queries the response was YES. [2024-06-20 16:51:03,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104803 conditions, 10028 events. 6602/10028 cut-off events. For 536331/536335 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 60631 event pairs, 2350 based on Foata normal form. 8/10036 useless extension candidates. Maximal degree in co-relation 104665. Up to 9792 conditions per place. [2024-06-20 16:51:03,697 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 942 selfloop transitions, 34 changer transitions 0/979 dead transitions. [2024-06-20 16:51:03,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 979 transitions, 24937 flow [2024-06-20 16:51:03,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:51:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:51:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 16:51:03,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:51:03,698 INFO L175 Difference]: Start difference. First operand has 289 places, 955 transitions, 22810 flow. Second operand 7 states and 112 transitions. [2024-06-20 16:51:03,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 979 transitions, 24937 flow [2024-06-20 16:51:05,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 979 transitions, 24876 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 16:51:05,302 INFO L231 Difference]: Finished difference. Result has 292 places, 957 transitions, 22876 flow [2024-06-20 16:51:05,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=22749, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=955, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=921, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22876, PETRI_PLACES=292, PETRI_TRANSITIONS=957} [2024-06-20 16:51:05,303 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-20 16:51:05,303 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 957 transitions, 22876 flow [2024-06-20 16:51:05,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:05,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:05,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:05,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:51:05,303 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)] === [2024-06-20 16:51:05,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:05,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1430365087, now seen corresponding path program 5 times [2024-06-20 16:51:05,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:05,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008413209] [2024-06-20 16:51:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:05,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:06,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:06,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008413209] [2024-06-20 16:51:06,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008413209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:06,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:06,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:06,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632894878] [2024-06-20 16:51:06,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:06,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:06,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:06,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:06,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 957 transitions, 22876 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:06,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:06,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:06,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:09,698 INFO L124 PetriNetUnfolderBase]: 6594/10005 cut-off events. [2024-06-20 16:51:09,698 INFO L125 PetriNetUnfolderBase]: For 545372/545377 co-relation queries the response was YES. [2024-06-20 16:51:09,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105037 conditions, 10005 events. 6594/10005 cut-off events. For 545372/545377 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 60365 event pairs, 1833 based on Foata normal form. 6/10011 useless extension candidates. Maximal degree in co-relation 104898. Up to 9597 conditions per place. [2024-06-20 16:51:09,825 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 884 selfloop transitions, 97 changer transitions 0/984 dead transitions. [2024-06-20 16:51:09,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 984 transitions, 25037 flow [2024-06-20 16:51:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:51:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:51:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 16:51:09,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 16:51:09,826 INFO L175 Difference]: Start difference. First operand has 292 places, 957 transitions, 22876 flow. Second operand 7 states and 119 transitions. [2024-06-20 16:51:09,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 984 transitions, 25037 flow [2024-06-20 16:51:11,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 984 transitions, 24936 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 16:51:11,491 INFO L231 Difference]: Finished difference. Result has 294 places, 959 transitions, 23039 flow [2024-06-20 16:51:11,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=22775, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=860, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=23039, PETRI_PLACES=294, PETRI_TRANSITIONS=959} [2024-06-20 16:51:11,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-20 16:51:11,492 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 959 transitions, 23039 flow [2024-06-20 16:51:11,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:11,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:11,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:11,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:51:11,493 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)] === [2024-06-20 16:51:11,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:11,493 INFO L85 PathProgramCache]: Analyzing trace with hash 54781063, now seen corresponding path program 1 times [2024-06-20 16:51:11,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:11,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875798308] [2024-06-20 16:51:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:11,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:12,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:12,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875798308] [2024-06-20 16:51:12,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875798308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:12,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:12,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:12,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177329918] [2024-06-20 16:51:12,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:12,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:12,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:12,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:12,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:12,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:12,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 959 transitions, 23039 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:12,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:12,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:12,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:15,619 INFO L124 PetriNetUnfolderBase]: 6576/9989 cut-off events. [2024-06-20 16:51:15,619 INFO L125 PetriNetUnfolderBase]: For 562414/562418 co-relation queries the response was YES. [2024-06-20 16:51:15,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105118 conditions, 9989 events. 6576/9989 cut-off events. For 562414/562418 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 60417 event pairs, 2336 based on Foata normal form. 8/9997 useless extension candidates. Maximal degree in co-relation 104978. Up to 9720 conditions per place. [2024-06-20 16:51:15,751 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 923 selfloop transitions, 60 changer transitions 0/986 dead transitions. [2024-06-20 16:51:15,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 986 transitions, 25257 flow [2024-06-20 16:51:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:51:15,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:51:15,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 16:51:15,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-20 16:51:15,752 INFO L175 Difference]: Start difference. First operand has 294 places, 959 transitions, 23039 flow. Second operand 7 states and 113 transitions. [2024-06-20 16:51:15,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 986 transitions, 25257 flow [2024-06-20 16:51:17,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 986 transitions, 24919 flow, removed 79 selfloop flow, removed 5 redundant places. [2024-06-20 16:51:17,717 INFO L231 Difference]: Finished difference. Result has 296 places, 961 transitions, 22933 flow [2024-06-20 16:51:17,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=22713, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=899, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22933, PETRI_PLACES=296, PETRI_TRANSITIONS=961} [2024-06-20 16:51:17,718 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-20 16:51:17,718 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 961 transitions, 22933 flow [2024-06-20 16:51:17,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:17,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:17,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:17,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:51:17,719 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)] === [2024-06-20 16:51:17,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:17,719 INFO L85 PathProgramCache]: Analyzing trace with hash -173535177, now seen corresponding path program 11 times [2024-06-20 16:51:17,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:17,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376240133] [2024-06-20 16:51:17,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:17,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:18,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:18,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376240133] [2024-06-20 16:51:18,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376240133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:18,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:18,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:18,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482576471] [2024-06-20 16:51:18,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:18,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:18,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:18,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:18,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:18,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:18,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 961 transitions, 22933 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:18,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:18,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:18,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:21,937 INFO L124 PetriNetUnfolderBase]: 6424/9768 cut-off events. [2024-06-20 16:51:21,938 INFO L125 PetriNetUnfolderBase]: For 557313/557331 co-relation queries the response was YES. [2024-06-20 16:51:22,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100267 conditions, 9768 events. 6424/9768 cut-off events. For 557313/557331 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 59116 event pairs, 1381 based on Foata normal form. 82/9850 useless extension candidates. Maximal degree in co-relation 100126. Up to 8866 conditions per place. [2024-06-20 16:51:22,081 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 856 selfloop transitions, 149 changer transitions 0/1008 dead transitions. [2024-06-20 16:51:22,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 1008 transitions, 25336 flow [2024-06-20 16:51:22,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 16:51:22,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-20 16:51:22,082 INFO L175 Difference]: Start difference. First operand has 296 places, 961 transitions, 22933 flow. Second operand 8 states and 153 transitions. [2024-06-20 16:51:22,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 1008 transitions, 25336 flow [2024-06-20 16:51:23,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 1008 transitions, 25177 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 16:51:23,866 INFO L231 Difference]: Finished difference. Result has 300 places, 962 transitions, 23239 flow [2024-06-20 16:51:23,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=22774, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=961, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23239, PETRI_PLACES=300, PETRI_TRANSITIONS=962} [2024-06-20 16:51:23,867 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-20 16:51:23,867 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 962 transitions, 23239 flow [2024-06-20 16:51:23,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:23,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:23,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:23,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:51:23,868 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:23,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:23,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1912667077, now seen corresponding path program 1 times [2024-06-20 16:51:23,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:23,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384551284] [2024-06-20 16:51:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:23,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:24,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:24,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384551284] [2024-06-20 16:51:24,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384551284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:24,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:24,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:51:24,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170576269] [2024-06-20 16:51:24,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:24,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:51:24,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:24,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:51:24,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:51:24,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:51:24,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 962 transitions, 23239 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:24,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:24,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:51:24,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:27,724 INFO L124 PetriNetUnfolderBase]: 6130/9350 cut-off events. [2024-06-20 16:51:27,724 INFO L125 PetriNetUnfolderBase]: For 520235/520599 co-relation queries the response was YES. [2024-06-20 16:51:27,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98175 conditions, 9350 events. 6130/9350 cut-off events. For 520235/520599 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 56555 event pairs, 1640 based on Foata normal form. 257/9514 useless extension candidates. Maximal degree in co-relation 98032. Up to 8924 conditions per place. [2024-06-20 16:51:27,869 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 884 selfloop transitions, 54 changer transitions 0/980 dead transitions. [2024-06-20 16:51:27,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 980 transitions, 25287 flow [2024-06-20 16:51:27,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:51:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:51:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-20 16:51:27,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-06-20 16:51:27,871 INFO L175 Difference]: Start difference. First operand has 300 places, 962 transitions, 23239 flow. Second operand 5 states and 93 transitions. [2024-06-20 16:51:27,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 980 transitions, 25287 flow [2024-06-20 16:51:29,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 980 transitions, 24879 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-20 16:51:29,506 INFO L231 Difference]: Finished difference. Result has 299 places, 965 transitions, 23059 flow [2024-06-20 16:51:29,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=22831, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=908, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=23059, PETRI_PLACES=299, PETRI_TRANSITIONS=965} [2024-06-20 16:51:29,506 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-20 16:51:29,507 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 965 transitions, 23059 flow [2024-06-20 16:51:29,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:29,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:29,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:29,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:51:29,507 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)] === [2024-06-20 16:51:29,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:29,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1572183275, now seen corresponding path program 2 times [2024-06-20 16:51:29,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:29,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080086262] [2024-06-20 16:51:29,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:29,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:30,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:30,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080086262] [2024-06-20 16:51:30,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080086262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:30,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:30,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:30,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509875576] [2024-06-20 16:51:30,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:30,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:30,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:30,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:30,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:30,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:30,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 965 transitions, 23059 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) [2024-06-20 16:51:30,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:30,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:30,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:33,777 INFO L124 PetriNetUnfolderBase]: 6915/10568 cut-off events. [2024-06-20 16:51:33,777 INFO L125 PetriNetUnfolderBase]: For 578164/578176 co-relation queries the response was YES. [2024-06-20 16:51:33,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108064 conditions, 10568 events. 6915/10568 cut-off events. For 578164/578176 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 65032 event pairs, 1223 based on Foata normal form. 22/10590 useless extension candidates. Maximal degree in co-relation 107920. Up to 5002 conditions per place. [2024-06-20 16:51:33,909 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 442 selfloop transitions, 585 changer transitions 0/1030 dead transitions. [2024-06-20 16:51:33,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1030 transitions, 25981 flow [2024-06-20 16:51:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:51:33,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:51:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-20 16:51:33,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-20 16:51:33,910 INFO L175 Difference]: Start difference. First operand has 299 places, 965 transitions, 23059 flow. Second operand 10 states and 185 transitions. [2024-06-20 16:51:33,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1030 transitions, 25981 flow [2024-06-20 16:51:35,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 1030 transitions, 25854 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:51:35,647 INFO L231 Difference]: Finished difference. Result has 306 places, 975 transitions, 24628 flow [2024-06-20 16:51:35,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=22950, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=576, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24628, PETRI_PLACES=306, PETRI_TRANSITIONS=975} [2024-06-20 16:51:35,648 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-20 16:51:35,648 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 975 transitions, 24628 flow [2024-06-20 16:51:35,648 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) [2024-06-20 16:51:35,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:35,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:35,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:51:35,648 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)] === [2024-06-20 16:51:35,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:35,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1668806089, now seen corresponding path program 3 times [2024-06-20 16:51:35,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:35,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778626960] [2024-06-20 16:51:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:35,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:36,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:36,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778626960] [2024-06-20 16:51:36,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778626960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:36,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:36,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:36,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479247592] [2024-06-20 16:51:36,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:36,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:36,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:36,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:36,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:36,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:36,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 975 transitions, 24628 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) [2024-06-20 16:51:36,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:36,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:36,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:40,351 INFO L124 PetriNetUnfolderBase]: 7496/11517 cut-off events. [2024-06-20 16:51:40,351 INFO L125 PetriNetUnfolderBase]: For 661750/661762 co-relation queries the response was YES. [2024-06-20 16:51:40,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119315 conditions, 11517 events. 7496/11517 cut-off events. For 661750/661762 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 72941 event pairs, 1700 based on Foata normal form. 38/11555 useless extension candidates. Maximal degree in co-relation 119170. Up to 8472 conditions per place. [2024-06-20 16:51:40,508 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 511 selfloop transitions, 540 changer transitions 0/1054 dead transitions. [2024-06-20 16:51:40,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1054 transitions, 27778 flow [2024-06-20 16:51:40,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:51:40,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:51:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-20 16:51:40,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-20 16:51:40,510 INFO L175 Difference]: Start difference. First operand has 306 places, 975 transitions, 24628 flow. Second operand 10 states and 185 transitions. [2024-06-20 16:51:40,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1054 transitions, 27778 flow