./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix051_pso.opt_rmo.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix051_pso.opt_rmo.opt_tso.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-eb4cb34-m [2024-06-21 21:14:18,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:14:18,894 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:14:18,897 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:14:18,897 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:14:18,910 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:14:18,910 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:14:18,911 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:14:18,911 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:14:18,911 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:14:18,912 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:14:18,912 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:14:18,912 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:14:18,912 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:14:18,913 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:14:18,913 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:14:18,913 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:14:18,914 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:14:18,914 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:14:18,914 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:14:18,914 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:14:18,915 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:14:18,915 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:14:18,915 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:14:18,916 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:14:18,916 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:14:18,916 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:14:18,917 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:14:18,917 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:14:18,917 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:14:18,917 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:14:18,918 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:14:18,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:14:18,918 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:14:18,919 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:14:18,919 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:14:18,919 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:14:18,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:14:18,920 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:14:18,920 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:14:18,920 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:14:18,921 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:14:18,921 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:14:18,921 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:14:19,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:14:19,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:14:19,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:14:19,143 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:14:19,143 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:14:19,144 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.opt.i [2024-06-21 21:14:20,112 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:14:20,303 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:14:20,303 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.opt.i [2024-06-21 21:14:20,315 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f88407a7/3724cbfcab13423b882ae2278fd574ad/FLAGef40cd719 [2024-06-21 21:14:20,678 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f88407a7/3724cbfcab13423b882ae2278fd574ad [2024-06-21 21:14:20,680 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:14:20,680 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:14:20,681 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix051_pso.opt_rmo.opt_tso.opt.yml/witness.yml [2024-06-21 21:14:20,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:14:20,831 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:14:20,833 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:14:20,834 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:14:20,837 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:14:20,838 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:14:20" (1/2) ... [2024-06-21 21:14:20,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e63325b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:14:20, skipping insertion in model container [2024-06-21 21:14:20,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:14:20" (1/2) ... [2024-06-21 21:14:20,841 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@16b60212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:14:20, skipping insertion in model container [2024-06-21 21:14:20,841 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:14:20" (2/2) ... [2024-06-21 21:14:20,842 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e63325b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:20, skipping insertion in model container [2024-06-21 21:14:20,842 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:14:20" (2/2) ... [2024-06-21 21:14:20,842 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:14:20,940 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:14:20,941 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((! multithreaded || (z == 0 || z == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:14:20,941 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || (z == 0 || z == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:14:20,941 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || (z == 0 || z == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:14:20,941 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((! multithreaded || (z == 0 || z == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:14:20,942 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:14:20,942 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-21 21:14:20,981 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:14:21,292 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:14:21,309 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:14:21,462 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:14:21,501 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:14:21,502 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:21 WrapperNode [2024-06-21 21:14:21,502 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:14:21,503 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:14:21,503 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:14:21,503 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:14:21,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:21" (1/1) ... [2024-06-21 21:14:21,526 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:21" (1/1) ... [2024-06-21 21:14:21,565 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 138 [2024-06-21 21:14:21,566 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:14:21,566 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:14:21,567 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:14:21,567 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:14:21,578 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:21" (1/1) ... [2024-06-21 21:14:21,582 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:21" (1/1) ... [2024-06-21 21:14:21,587 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:21" (1/1) ... [2024-06-21 21:14:21,609 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 21:14:21,609 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:21" (1/1) ... [2024-06-21 21:14:21,609 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:21" (1/1) ... [2024-06-21 21:14:21,618 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:21" (1/1) ... [2024-06-21 21:14:21,619 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:21" (1/1) ... [2024-06-21 21:14:21,621 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:21" (1/1) ... [2024-06-21 21:14:21,622 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:21" (1/1) ... [2024-06-21 21:14:21,625 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:14:21,626 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:14:21,626 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:14:21,626 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:14:21,638 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:21" (1/1) ... [2024-06-21 21:14:21,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:14:21,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:14:21,665 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:14:21,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:14:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:14:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:14:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:14:21,696 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:14:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:14:21,696 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:14:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:14:21,697 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:14:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 21:14:21,697 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 21:14:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:14:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:14:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:14:21,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:14:21,708 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:14:21,821 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:14:21,823 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:14:22,121 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:14:22,122 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:14:22,245 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:14:22,245 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:14:22,246 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:14:22 BoogieIcfgContainer [2024-06-21 21:14:22,246 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:14:22,248 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:14:22,248 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:14:22,250 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:14:22,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:14:20" (1/4) ... [2024-06-21 21:14:22,251 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5291a3bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:14:22, skipping insertion in model container [2024-06-21 21:14:22,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:14:20" (2/4) ... [2024-06-21 21:14:22,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5291a3bb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:14:22, skipping insertion in model container [2024-06-21 21:14:22,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:14:21" (3/4) ... [2024-06-21 21:14:22,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5291a3bb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:14:22, skipping insertion in model container [2024-06-21 21:14:22,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:14:22" (4/4) ... [2024-06-21 21:14:22,253 INFO L112 eAbstractionObserver]: Analyzing ICFG mix051_pso.opt_rmo.opt_tso.opt.i [2024-06-21 21:14:22,265 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:14:22,265 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 21:14:22,266 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:14:22,317 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:14:22,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 21:14:22,378 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-21 21:14:22,378 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:14:22,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:14:22,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 21:14:22,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-21 21:14:22,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:14:22,400 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;@550f1cc8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:14:22,400 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 21:14:22,404 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:14:22,404 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 21:14:22,404 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:14:22,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:22,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:14:22,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:22,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:22,409 INFO L85 PathProgramCache]: Analyzing trace with hash 373213845, now seen corresponding path program 1 times [2024-06-21 21:14:22,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:22,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024118462] [2024-06-21 21:14:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:22,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:23,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:23,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024118462] [2024-06-21 21:14:23,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024118462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:23,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:23,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:14:23,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873503050] [2024-06-21 21:14:23,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:23,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:14:23,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:23,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:14:23,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:14:23,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 21:14:23,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:23,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:23,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 21:14:23,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:24,157 INFO L124 PetriNetUnfolderBase]: 5296/7608 cut-off events. [2024-06-21 21:14:24,157 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-06-21 21:14:24,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15159 conditions, 7608 events. 5296/7608 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 42812 event pairs, 3946 based on Foata normal form. 1/7420 useless extension candidates. Maximal degree in co-relation 15146. Up to 7282 conditions per place. [2024-06-21 21:14:24,194 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 40 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-21 21:14:24,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 221 flow [2024-06-21 21:14:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:14:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:14:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-21 21:14:24,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6535947712418301 [2024-06-21 21:14:24,205 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 100 transitions. [2024-06-21 21:14:24,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 221 flow [2024-06-21 21:14:24,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 21:14:24,210 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-21 21:14:24,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-21 21:14:24,214 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-21 21:14:24,214 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-21 21:14:24,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:24,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:24,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:24,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:14:24,215 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:24,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:24,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2118699822, now seen corresponding path program 1 times [2024-06-21 21:14:24,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:24,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743837699] [2024-06-21 21:14:24,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:24,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:24,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:24,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743837699] [2024-06-21 21:14:24,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743837699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:24,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:24,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:14:24,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897034893] [2024-06-21 21:14:24,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:24,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:14:24,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:24,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:14:24,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:14:24,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-21 21:14:24,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:24,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:24,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-21 21:14:24,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:25,606 INFO L124 PetriNetUnfolderBase]: 6191/8655 cut-off events. [2024-06-21 21:14:25,607 INFO L125 PetriNetUnfolderBase]: For 1762/1762 co-relation queries the response was YES. [2024-06-21 21:14:25,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19893 conditions, 8655 events. 6191/8655 cut-off events. For 1762/1762 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 47391 event pairs, 4100 based on Foata normal form. 4/8601 useless extension candidates. Maximal degree in co-relation 19881. Up to 8452 conditions per place. [2024-06-21 21:14:25,656 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 51 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-21 21:14:25,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 315 flow [2024-06-21 21:14:25,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:14:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:14:25,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-21 21:14:25,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2024-06-21 21:14:25,661 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 128 transitions. [2024-06-21 21:14:25,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 315 flow [2024-06-21 21:14:25,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:14:25,663 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-21 21:14:25,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-21 21:14:25,664 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-21 21:14:25,665 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-21 21:14:25,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:25,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:25,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:25,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:14:25,668 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:25,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:25,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1255184382, now seen corresponding path program 1 times [2024-06-21 21:14:25,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:25,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126021968] [2024-06-21 21:14:25,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:25,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:26,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:26,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126021968] [2024-06-21 21:14:26,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126021968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:26,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:26,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:14:26,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509086176] [2024-06-21 21:14:26,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:26,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:14:26,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:26,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:14:26,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:14:26,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-21 21:14:26,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:26,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:26,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-21 21:14:26,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:27,162 INFO L124 PetriNetUnfolderBase]: 6209/8722 cut-off events. [2024-06-21 21:14:27,162 INFO L125 PetriNetUnfolderBase]: For 5064/5064 co-relation queries the response was YES. [2024-06-21 21:14:27,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22473 conditions, 8722 events. 6209/8722 cut-off events. For 5064/5064 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 48031 event pairs, 3061 based on Foata normal form. 7/8704 useless extension candidates. Maximal degree in co-relation 22459. Up to 8373 conditions per place. [2024-06-21 21:14:27,204 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 69 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-21 21:14:27,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 531 flow [2024-06-21 21:14:27,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:14:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:14:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 168 transitions. [2024-06-21 21:14:27,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588235294117647 [2024-06-21 21:14:27,206 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 168 transitions. [2024-06-21 21:14:27,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 531 flow [2024-06-21 21:14:27,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 512 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 21:14:27,210 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 308 flow [2024-06-21 21:14:27,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-21 21:14:27,210 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-21 21:14:27,211 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 308 flow [2024-06-21 21:14:27,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:27,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:27,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:27,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:14:27,211 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:27,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:27,212 INFO L85 PathProgramCache]: Analyzing trace with hash -205233313, now seen corresponding path program 1 times [2024-06-21 21:14:27,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:27,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719673605] [2024-06-21 21:14:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:27,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:27,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:27,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719673605] [2024-06-21 21:14:27,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719673605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:27,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:27,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:14:27,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955271339] [2024-06-21 21:14:27,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:27,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:14:27,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:27,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:14:27,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:14:28,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-21 21:14:28,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:28,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:28,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-21 21:14:28,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:28,815 INFO L124 PetriNetUnfolderBase]: 6351/8942 cut-off events. [2024-06-21 21:14:28,815 INFO L125 PetriNetUnfolderBase]: For 12467/12486 co-relation queries the response was YES. [2024-06-21 21:14:28,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27267 conditions, 8942 events. 6351/8942 cut-off events. For 12467/12486 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 49795 event pairs, 2386 based on Foata normal form. 48/8963 useless extension candidates. Maximal degree in co-relation 27250. Up to 8365 conditions per place. [2024-06-21 21:14:28,863 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 79 selfloop transitions, 24 changer transitions 0/112 dead transitions. [2024-06-21 21:14:28,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 112 transitions, 686 flow [2024-06-21 21:14:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:14:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:14:28,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2024-06-21 21:14:28,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6437908496732027 [2024-06-21 21:14:28,865 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 308 flow. Second operand 6 states and 197 transitions. [2024-06-21 21:14:28,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 112 transitions, 686 flow [2024-06-21 21:14:28,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 112 transitions, 674 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 21:14:28,872 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 377 flow [2024-06-21 21:14:28,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-21 21:14:28,873 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2024-06-21 21:14:28,873 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 377 flow [2024-06-21 21:14:28,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:28,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:28,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:28,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:14:28,874 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:28,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:28,874 INFO L85 PathProgramCache]: Analyzing trace with hash -351027276, now seen corresponding path program 1 times [2024-06-21 21:14:28,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:28,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863364420] [2024-06-21 21:14:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:28,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:29,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:29,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863364420] [2024-06-21 21:14:29,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863364420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:29,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:29,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:14:29,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759534324] [2024-06-21 21:14:29,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:29,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:14:29,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:29,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:14:29,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:14:29,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-21 21:14:29,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 377 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:29,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:29,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-21 21:14:29,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:30,383 INFO L124 PetriNetUnfolderBase]: 5437/7897 cut-off events. [2024-06-21 21:14:30,384 INFO L125 PetriNetUnfolderBase]: For 15553/15581 co-relation queries the response was YES. [2024-06-21 21:14:30,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25886 conditions, 7897 events. 5437/7897 cut-off events. For 15553/15581 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 45435 event pairs, 2456 based on Foata normal form. 3/7879 useless extension candidates. Maximal degree in co-relation 25865. Up to 7488 conditions per place. [2024-06-21 21:14:30,426 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 63 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-21 21:14:30,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 567 flow [2024-06-21 21:14:30,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:14:30,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:14:30,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 21:14:30,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254901960784314 [2024-06-21 21:14:30,431 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 377 flow. Second operand 5 states and 134 transitions. [2024-06-21 21:14:30,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 567 flow [2024-06-21 21:14:30,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 506 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:14:30,439 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 347 flow [2024-06-21 21:14:30,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-21 21:14:30,442 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-21 21:14:30,442 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 347 flow [2024-06-21 21:14:30,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:30,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:30,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:30,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:14:30,443 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:30,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:30,443 INFO L85 PathProgramCache]: Analyzing trace with hash -78198259, now seen corresponding path program 1 times [2024-06-21 21:14:30,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:30,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164974643] [2024-06-21 21:14:30,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:30,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:31,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:31,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164974643] [2024-06-21 21:14:31,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164974643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:31,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:31,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:14:31,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970871815] [2024-06-21 21:14:31,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:31,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:14:31,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:31,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:14:31,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:14:31,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 21:14:31,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:31,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:31,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 21:14:31,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:32,143 INFO L124 PetriNetUnfolderBase]: 6355/8944 cut-off events. [2024-06-21 21:14:32,144 INFO L125 PetriNetUnfolderBase]: For 21038/21058 co-relation queries the response was YES. [2024-06-21 21:14:32,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29779 conditions, 8944 events. 6355/8944 cut-off events. For 21038/21058 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 49667 event pairs, 2932 based on Foata normal form. 24/8947 useless extension candidates. Maximal degree in co-relation 29756. Up to 8595 conditions per place. [2024-06-21 21:14:32,286 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 66 selfloop transitions, 25 changer transitions 0/99 dead transitions. [2024-06-21 21:14:32,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 666 flow [2024-06-21 21:14:32,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:14:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:14:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-21 21:14:32,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392156862745098 [2024-06-21 21:14:32,287 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 347 flow. Second operand 6 states and 165 transitions. [2024-06-21 21:14:32,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 666 flow [2024-06-21 21:14:32,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 637 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 21:14:32,295 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 414 flow [2024-06-21 21:14:32,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=414, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-21 21:14:32,298 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-06-21 21:14:32,298 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 414 flow [2024-06-21 21:14:32,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:32,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:32,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:32,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:14:32,298 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:32,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:32,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1965254995, now seen corresponding path program 2 times [2024-06-21 21:14:32,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:32,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321190462] [2024-06-21 21:14:32,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:32,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:32,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:32,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321190462] [2024-06-21 21:14:32,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321190462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:32,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:32,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:14:32,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823191667] [2024-06-21 21:14:32,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:32,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:14:32,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:32,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:14:32,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:14:33,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 21:14:33,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 414 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:33,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:33,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 21:14:33,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:34,163 INFO L124 PetriNetUnfolderBase]: 6310/8871 cut-off events. [2024-06-21 21:14:34,163 INFO L125 PetriNetUnfolderBase]: For 25004/25026 co-relation queries the response was YES. [2024-06-21 21:14:34,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30365 conditions, 8871 events. 6310/8871 cut-off events. For 25004/25026 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 48985 event pairs, 2946 based on Foata normal form. 23/8867 useless extension candidates. Maximal degree in co-relation 30342. Up to 8526 conditions per place. [2024-06-21 21:14:34,224 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 59 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-06-21 21:14:34,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 646 flow [2024-06-21 21:14:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:14:34,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:14:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 21:14:34,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2024-06-21 21:14:34,226 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 414 flow. Second operand 6 states and 160 transitions. [2024-06-21 21:14:34,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 646 flow [2024-06-21 21:14:34,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 603 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:14:34,238 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 434 flow [2024-06-21 21:14:34,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=434, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-06-21 21:14:34,239 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2024-06-21 21:14:34,240 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 434 flow [2024-06-21 21:14:34,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:34,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:34,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:34,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:14:34,240 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:34,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:34,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1558989351, now seen corresponding path program 1 times [2024-06-21 21:14:34,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:34,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417869746] [2024-06-21 21:14:34,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:34,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:35,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:35,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417869746] [2024-06-21 21:14:35,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417869746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:35,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:35,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:14:35,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277140858] [2024-06-21 21:14:35,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:35,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:14:35,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:35,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:14:35,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:14:35,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 21:14:35,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 434 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:35,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:35,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 21:14:35,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:36,598 INFO L124 PetriNetUnfolderBase]: 6889/9838 cut-off events. [2024-06-21 21:14:36,598 INFO L125 PetriNetUnfolderBase]: For 30543/30543 co-relation queries the response was YES. [2024-06-21 21:14:36,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33613 conditions, 9838 events. 6889/9838 cut-off events. For 30543/30543 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 54859 event pairs, 3133 based on Foata normal form. 6/9828 useless extension candidates. Maximal degree in co-relation 33589. Up to 9382 conditions per place. [2024-06-21 21:14:36,656 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 83 selfloop transitions, 17 changer transitions 0/108 dead transitions. [2024-06-21 21:14:36,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 108 transitions, 771 flow [2024-06-21 21:14:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:14:36,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:14:36,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 21:14:36,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042016806722689 [2024-06-21 21:14:36,658 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 434 flow. Second operand 7 states and 180 transitions. [2024-06-21 21:14:36,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 108 transitions, 771 flow [2024-06-21 21:14:36,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 108 transitions, 680 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:14:36,681 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 455 flow [2024-06-21 21:14:36,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=455, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-21 21:14:36,682 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2024-06-21 21:14:36,682 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 455 flow [2024-06-21 21:14:36,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:36,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:36,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:36,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:14:36,682 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:36,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:36,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1464977718, now seen corresponding path program 1 times [2024-06-21 21:14:36,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:36,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650588986] [2024-06-21 21:14:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:36,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:37,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:37,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650588986] [2024-06-21 21:14:37,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650588986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:37,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:37,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:14:37,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85588882] [2024-06-21 21:14:37,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:37,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:14:37,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:37,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:14:37,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:14:37,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 21:14:37,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:37,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:37,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 21:14:37,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:38,457 INFO L124 PetriNetUnfolderBase]: 6875/10012 cut-off events. [2024-06-21 21:14:38,457 INFO L125 PetriNetUnfolderBase]: For 37845/37845 co-relation queries the response was YES. [2024-06-21 21:14:38,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35908 conditions, 10012 events. 6875/10012 cut-off events. For 37845/37845 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 57012 event pairs, 3191 based on Foata normal form. 4/10013 useless extension candidates. Maximal degree in co-relation 35882. Up to 9406 conditions per place. [2024-06-21 21:14:38,515 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 77 selfloop transitions, 10 changer transitions 0/95 dead transitions. [2024-06-21 21:14:38,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 95 transitions, 699 flow [2024-06-21 21:14:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:14:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:14:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 21:14:38,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4980392156862745 [2024-06-21 21:14:38,517 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 455 flow. Second operand 5 states and 127 transitions. [2024-06-21 21:14:38,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 95 transitions, 699 flow [2024-06-21 21:14:38,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 95 transitions, 651 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 21:14:38,545 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 476 flow [2024-06-21 21:14:38,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=476, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-21 21:14:38,545 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2024-06-21 21:14:38,546 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 476 flow [2024-06-21 21:14:38,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:38,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:38,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:38,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:14:38,546 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:38,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:38,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1848568094, now seen corresponding path program 1 times [2024-06-21 21:14:38,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:38,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875060328] [2024-06-21 21:14:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:38,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:39,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:39,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875060328] [2024-06-21 21:14:39,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875060328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:39,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:39,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:14:39,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070765854] [2024-06-21 21:14:39,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:39,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:14:39,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:14:39,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:14:39,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 21:14:39,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 476 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:39,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:39,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 21:14:39,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:40,723 INFO L124 PetriNetUnfolderBase]: 8101/11387 cut-off events. [2024-06-21 21:14:40,724 INFO L125 PetriNetUnfolderBase]: For 59985/60077 co-relation queries the response was YES. [2024-06-21 21:14:40,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44489 conditions, 11387 events. 8101/11387 cut-off events. For 59985/60077 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 64063 event pairs, 2691 based on Foata normal form. 54/11411 useless extension candidates. Maximal degree in co-relation 44462. Up to 10308 conditions per place. [2024-06-21 21:14:40,797 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 88 selfloop transitions, 32 changer transitions 0/129 dead transitions. [2024-06-21 21:14:40,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 129 transitions, 940 flow [2024-06-21 21:14:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:14:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:14:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-21 21:14:40,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434173669467787 [2024-06-21 21:14:40,799 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 476 flow. Second operand 7 states and 194 transitions. [2024-06-21 21:14:40,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 129 transitions, 940 flow [2024-06-21 21:14:40,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 129 transitions, 901 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 21:14:40,827 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 566 flow [2024-06-21 21:14:40,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=566, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-21 21:14:40,828 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2024-06-21 21:14:40,829 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 566 flow [2024-06-21 21:14:40,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:40,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:40,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:40,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:14:40,830 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:40,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:40,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1848507644, now seen corresponding path program 2 times [2024-06-21 21:14:40,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:40,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768829438] [2024-06-21 21:14:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:40,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:41,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:41,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768829438] [2024-06-21 21:14:41,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768829438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:41,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:41,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:14:41,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303218183] [2024-06-21 21:14:41,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:41,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:14:41,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:41,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:14:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:14:41,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 21:14:41,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 566 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:41,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:41,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 21:14:41,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:43,090 INFO L124 PetriNetUnfolderBase]: 8134/11469 cut-off events. [2024-06-21 21:14:43,091 INFO L125 PetriNetUnfolderBase]: For 73067/73159 co-relation queries the response was YES. [2024-06-21 21:14:43,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46713 conditions, 11469 events. 8134/11469 cut-off events. For 73067/73159 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 65199 event pairs, 3552 based on Foata normal form. 87/11526 useless extension candidates. Maximal degree in co-relation 46685. Up to 10852 conditions per place. [2024-06-21 21:14:43,158 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 85 selfloop transitions, 31 changer transitions 0/125 dead transitions. [2024-06-21 21:14:43,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 125 transitions, 934 flow [2024-06-21 21:14:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:14:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:14:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-21 21:14:43,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5322128851540616 [2024-06-21 21:14:43,160 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 566 flow. Second operand 7 states and 190 transitions. [2024-06-21 21:14:43,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 125 transitions, 934 flow [2024-06-21 21:14:43,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 125 transitions, 887 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 21:14:43,203 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 634 flow [2024-06-21 21:14:43,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=634, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2024-06-21 21:14:43,204 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 29 predicate places. [2024-06-21 21:14:43,204 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 634 flow [2024-06-21 21:14:43,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:43,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:43,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:43,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:14:43,205 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:43,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:43,205 INFO L85 PathProgramCache]: Analyzing trace with hash -917083243, now seen corresponding path program 1 times [2024-06-21 21:14:43,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:43,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994991485] [2024-06-21 21:14:43,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:43,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:43,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:43,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994991485] [2024-06-21 21:14:43,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994991485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:43,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:43,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:14:43,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780771116] [2024-06-21 21:14:43,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:43,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:14:43,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:43,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:14:43,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:14:43,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:14:43,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 87 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:43,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:43,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:14:43,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:45,251 INFO L124 PetriNetUnfolderBase]: 8465/11899 cut-off events. [2024-06-21 21:14:45,252 INFO L125 PetriNetUnfolderBase]: For 83193/83193 co-relation queries the response was YES. [2024-06-21 21:14:45,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50015 conditions, 11899 events. 8465/11899 cut-off events. For 83193/83193 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 65614 event pairs, 3709 based on Foata normal form. 4/11897 useless extension candidates. Maximal degree in co-relation 49985. Up to 11517 conditions per place. [2024-06-21 21:14:45,336 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 96 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2024-06-21 21:14:45,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 124 transitions, 1064 flow [2024-06-21 21:14:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:14:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:14:45,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 21:14:45,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-21 21:14:45,339 INFO L175 Difference]: Start difference. First operand has 83 places, 87 transitions, 634 flow. Second operand 6 states and 156 transitions. [2024-06-21 21:14:45,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 124 transitions, 1064 flow [2024-06-21 21:14:45,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 124 transitions, 985 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 21:14:45,418 INFO L231 Difference]: Finished difference. Result has 84 places, 95 transitions, 694 flow [2024-06-21 21:14:45,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=694, PETRI_PLACES=84, PETRI_TRANSITIONS=95} [2024-06-21 21:14:45,419 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-06-21 21:14:45,419 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 95 transitions, 694 flow [2024-06-21 21:14:45,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:45,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:45,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:45,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:14:45,419 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:45,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:45,420 INFO L85 PathProgramCache]: Analyzing trace with hash 518398810, now seen corresponding path program 1 times [2024-06-21 21:14:45,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:45,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547545219] [2024-06-21 21:14:45,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:45,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:46,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:46,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547545219] [2024-06-21 21:14:46,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547545219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:46,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:46,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:14:46,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749437144] [2024-06-21 21:14:46,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:46,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:14:46,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:46,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:14:46,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:14:46,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:14:46,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 95 transitions, 694 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:46,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:46,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:14:46,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:48,082 INFO L124 PetriNetUnfolderBase]: 8523/11974 cut-off events. [2024-06-21 21:14:48,082 INFO L125 PetriNetUnfolderBase]: For 99030/99030 co-relation queries the response was YES. [2024-06-21 21:14:48,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52650 conditions, 11974 events. 8523/11974 cut-off events. For 99030/99030 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 65935 event pairs, 3526 based on Foata normal form. 6/11966 useless extension candidates. Maximal degree in co-relation 52619. Up to 11416 conditions per place. [2024-06-21 21:14:48,153 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 100 selfloop transitions, 37 changer transitions 0/144 dead transitions. [2024-06-21 21:14:48,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 144 transitions, 1152 flow [2024-06-21 21:14:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:14:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:14:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 21:14:48,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049019607843137 [2024-06-21 21:14:48,155 INFO L175 Difference]: Start difference. First operand has 84 places, 95 transitions, 694 flow. Second operand 8 states and 206 transitions. [2024-06-21 21:14:48,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 144 transitions, 1152 flow [2024-06-21 21:14:48,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 144 transitions, 1110 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 21:14:48,234 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 827 flow [2024-06-21 21:14:48,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=827, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-06-21 21:14:48,234 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 37 predicate places. [2024-06-21 21:14:48,234 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 827 flow [2024-06-21 21:14:48,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:48,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:48,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:48,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:14:48,235 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:48,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:48,235 INFO L85 PathProgramCache]: Analyzing trace with hash 746299960, now seen corresponding path program 2 times [2024-06-21 21:14:48,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:48,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510580792] [2024-06-21 21:14:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:48,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:49,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:49,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510580792] [2024-06-21 21:14:49,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510580792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:49,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:49,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:14:49,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010093436] [2024-06-21 21:14:49,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:49,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:14:49,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:49,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:14:49,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:14:49,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:14:49,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 827 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:49,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:49,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:14:49,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:50,708 INFO L124 PetriNetUnfolderBase]: 8508/11948 cut-off events. [2024-06-21 21:14:50,709 INFO L125 PetriNetUnfolderBase]: For 113352/113352 co-relation queries the response was YES. [2024-06-21 21:14:50,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54803 conditions, 11948 events. 8508/11948 cut-off events. For 113352/113352 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 65775 event pairs, 3523 based on Foata normal form. 6/11940 useless extension candidates. Maximal degree in co-relation 54769. Up to 11395 conditions per place. [2024-06-21 21:14:50,785 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 102 selfloop transitions, 45 changer transitions 0/154 dead transitions. [2024-06-21 21:14:50,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 154 transitions, 1351 flow [2024-06-21 21:14:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:14:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:14:50,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 21:14:50,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049019607843137 [2024-06-21 21:14:50,789 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 827 flow. Second operand 8 states and 206 transitions. [2024-06-21 21:14:50,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 154 transitions, 1351 flow [2024-06-21 21:14:50,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 154 transitions, 1233 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 21:14:50,897 INFO L231 Difference]: Finished difference. Result has 95 places, 114 transitions, 956 flow [2024-06-21 21:14:50,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=956, PETRI_PLACES=95, PETRI_TRANSITIONS=114} [2024-06-21 21:14:50,898 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 41 predicate places. [2024-06-21 21:14:50,898 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 114 transitions, 956 flow [2024-06-21 21:14:50,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:50,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:50,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:50,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:14:50,899 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:50,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:50,899 INFO L85 PathProgramCache]: Analyzing trace with hash 754870840, now seen corresponding path program 3 times [2024-06-21 21:14:50,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:50,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83388633] [2024-06-21 21:14:50,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:50,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:51,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:51,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83388633] [2024-06-21 21:14:51,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83388633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:51,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:51,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:14:51,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834002562] [2024-06-21 21:14:51,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:51,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:14:51,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:51,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:14:51,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:14:51,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:14:51,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 114 transitions, 956 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:51,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:51,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:14:51,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:53,385 INFO L124 PetriNetUnfolderBase]: 8585/12087 cut-off events. [2024-06-21 21:14:53,385 INFO L125 PetriNetUnfolderBase]: For 128582/128582 co-relation queries the response was YES. [2024-06-21 21:14:53,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57076 conditions, 12087 events. 8585/12087 cut-off events. For 128582/128582 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 66747 event pairs, 3155 based on Foata normal form. 6/12080 useless extension candidates. Maximal degree in co-relation 57040. Up to 11234 conditions per place. [2024-06-21 21:14:53,480 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 100 selfloop transitions, 56 changer transitions 0/163 dead transitions. [2024-06-21 21:14:53,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 163 transitions, 1450 flow [2024-06-21 21:14:53,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:14:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:14:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 21:14:53,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147058823529411 [2024-06-21 21:14:53,482 INFO L175 Difference]: Start difference. First operand has 95 places, 114 transitions, 956 flow. Second operand 8 states and 210 transitions. [2024-06-21 21:14:53,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 163 transitions, 1450 flow [2024-06-21 21:14:53,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 163 transitions, 1356 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 21:14:53,592 INFO L231 Difference]: Finished difference. Result has 101 places, 119 transitions, 1075 flow [2024-06-21 21:14:53,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1075, PETRI_PLACES=101, PETRI_TRANSITIONS=119} [2024-06-21 21:14:53,592 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 47 predicate places. [2024-06-21 21:14:53,592 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 119 transitions, 1075 flow [2024-06-21 21:14:53,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:53,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:53,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:53,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:14:53,593 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:53,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:53,594 INFO L85 PathProgramCache]: Analyzing trace with hash -905655403, now seen corresponding path program 2 times [2024-06-21 21:14:53,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:53,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617651916] [2024-06-21 21:14:53,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:53,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:54,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:54,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617651916] [2024-06-21 21:14:54,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617651916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:54,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:54,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:14:54,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091574445] [2024-06-21 21:14:54,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:54,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:14:54,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:54,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:14:54,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:14:54,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:14:54,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 119 transitions, 1075 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:54,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:54,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:14:54,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:55,720 INFO L124 PetriNetUnfolderBase]: 8571/12096 cut-off events. [2024-06-21 21:14:55,721 INFO L125 PetriNetUnfolderBase]: For 144755/144770 co-relation queries the response was YES. [2024-06-21 21:14:55,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58779 conditions, 12096 events. 8571/12096 cut-off events. For 144755/144770 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 67067 event pairs, 3493 based on Foata normal form. 14/12104 useless extension candidates. Maximal degree in co-relation 58741. Up to 11685 conditions per place. [2024-06-21 21:14:55,814 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 111 selfloop transitions, 21 changer transitions 0/139 dead transitions. [2024-06-21 21:14:55,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 139 transitions, 1389 flow [2024-06-21 21:14:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:14:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:14:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 21:14:55,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-06-21 21:14:55,815 INFO L175 Difference]: Start difference. First operand has 101 places, 119 transitions, 1075 flow. Second operand 6 states and 147 transitions. [2024-06-21 21:14:55,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 139 transitions, 1389 flow [2024-06-21 21:14:56,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 139 transitions, 1238 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 21:14:56,004 INFO L231 Difference]: Finished difference. Result has 102 places, 119 transitions, 975 flow [2024-06-21 21:14:56,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=975, PETRI_PLACES=102, PETRI_TRANSITIONS=119} [2024-06-21 21:14:56,005 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 48 predicate places. [2024-06-21 21:14:56,005 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 119 transitions, 975 flow [2024-06-21 21:14:56,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:56,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:56,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:56,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:14:56,006 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:56,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:56,006 INFO L85 PathProgramCache]: Analyzing trace with hash -905856841, now seen corresponding path program 1 times [2024-06-21 21:14:56,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:56,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714585883] [2024-06-21 21:14:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:56,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:56,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:56,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714585883] [2024-06-21 21:14:56,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714585883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:56,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:56,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:14:56,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925405431] [2024-06-21 21:14:56,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:56,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:14:56,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:56,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:14:56,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:14:56,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 21:14:56,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 119 transitions, 975 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:56,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:56,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 21:14:56,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:58,051 INFO L124 PetriNetUnfolderBase]: 7453/10806 cut-off events. [2024-06-21 21:14:58,051 INFO L125 PetriNetUnfolderBase]: For 132962/132962 co-relation queries the response was YES. [2024-06-21 21:14:58,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52179 conditions, 10806 events. 7453/10806 cut-off events. For 132962/132962 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 61645 event pairs, 2905 based on Foata normal form. 4/10802 useless extension candidates. Maximal degree in co-relation 52140. Up to 10202 conditions per place. [2024-06-21 21:14:58,135 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 124 selfloop transitions, 21 changer transitions 0/153 dead transitions. [2024-06-21 21:14:58,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 153 transitions, 1477 flow [2024-06-21 21:14:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:14:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:14:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 21:14:58,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163398692810458 [2024-06-21 21:14:58,138 INFO L175 Difference]: Start difference. First operand has 102 places, 119 transitions, 975 flow. Second operand 6 states and 158 transitions. [2024-06-21 21:14:58,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 153 transitions, 1477 flow [2024-06-21 21:14:58,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 153 transitions, 1418 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:14:58,251 INFO L231 Difference]: Finished difference. Result has 103 places, 127 transitions, 1059 flow [2024-06-21 21:14:58,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1059, PETRI_PLACES=103, PETRI_TRANSITIONS=127} [2024-06-21 21:14:58,252 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2024-06-21 21:14:58,252 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 127 transitions, 1059 flow [2024-06-21 21:14:58,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:58,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:58,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:58,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:14:58,253 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:14:58,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:58,254 INFO L85 PathProgramCache]: Analyzing trace with hash 325016759, now seen corresponding path program 2 times [2024-06-21 21:14:58,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:58,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366995243] [2024-06-21 21:14:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:58,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:58,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:58,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366995243] [2024-06-21 21:14:58,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366995243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:58,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:58,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:14:58,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125214143] [2024-06-21 21:14:58,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:58,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:14:58,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:58,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:14:58,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:14:58,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 21:14:58,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 127 transitions, 1059 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:58,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:58,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 21:14:58,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:00,254 INFO L124 PetriNetUnfolderBase]: 7439/10794 cut-off events. [2024-06-21 21:15:00,255 INFO L125 PetriNetUnfolderBase]: For 149528/149534 co-relation queries the response was YES. [2024-06-21 21:15:00,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54379 conditions, 10794 events. 7439/10794 cut-off events. For 149528/149534 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 61669 event pairs, 2888 based on Foata normal form. 8/10797 useless extension candidates. Maximal degree in co-relation 54339. Up to 10190 conditions per place. [2024-06-21 21:15:00,338 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 118 selfloop transitions, 21 changer transitions 0/147 dead transitions. [2024-06-21 21:15:00,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 147 transitions, 1387 flow [2024-06-21 21:15:00,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:15:00,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:15:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 21:15:00,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49673202614379086 [2024-06-21 21:15:00,340 INFO L175 Difference]: Start difference. First operand has 103 places, 127 transitions, 1059 flow. Second operand 6 states and 152 transitions. [2024-06-21 21:15:00,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 147 transitions, 1387 flow [2024-06-21 21:15:00,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 147 transitions, 1317 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-21 21:15:00,499 INFO L231 Difference]: Finished difference. Result has 107 places, 127 transitions, 1040 flow [2024-06-21 21:15:00,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1040, PETRI_PLACES=107, PETRI_TRANSITIONS=127} [2024-06-21 21:15:00,500 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 53 predicate places. [2024-06-21 21:15:00,500 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 127 transitions, 1040 flow [2024-06-21 21:15:00,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:00,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:00,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:00,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:15:00,500 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:00,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:00,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1113253575, now seen corresponding path program 1 times [2024-06-21 21:15:00,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:00,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635662493] [2024-06-21 21:15:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:00,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:01,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:01,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635662493] [2024-06-21 21:15:01,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635662493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:01,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:01,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:01,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777854923] [2024-06-21 21:15:01,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:01,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:01,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:01,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:01,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:01,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:01,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 127 transitions, 1040 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:01,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:01,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:01,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:02,920 INFO L124 PetriNetUnfolderBase]: 8699/12292 cut-off events. [2024-06-21 21:15:02,920 INFO L125 PetriNetUnfolderBase]: For 193396/193402 co-relation queries the response was YES. [2024-06-21 21:15:02,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63399 conditions, 12292 events. 8699/12292 cut-off events. For 193396/193402 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 68347 event pairs, 3389 based on Foata normal form. 12/12292 useless extension candidates. Maximal degree in co-relation 63357. Up to 11483 conditions per place. [2024-06-21 21:15:03,003 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 128 selfloop transitions, 52 changer transitions 0/187 dead transitions. [2024-06-21 21:15:03,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 187 transitions, 1838 flow [2024-06-21 21:15:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:03,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-21 21:15:03,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378151260504201 [2024-06-21 21:15:03,006 INFO L175 Difference]: Start difference. First operand has 107 places, 127 transitions, 1040 flow. Second operand 7 states and 192 transitions. [2024-06-21 21:15:03,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 187 transitions, 1838 flow [2024-06-21 21:15:03,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 187 transitions, 1783 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 21:15:03,188 INFO L231 Difference]: Finished difference. Result has 111 places, 145 transitions, 1350 flow [2024-06-21 21:15:03,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1350, PETRI_PLACES=111, PETRI_TRANSITIONS=145} [2024-06-21 21:15:03,189 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 57 predicate places. [2024-06-21 21:15:03,189 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 145 transitions, 1350 flow [2024-06-21 21:15:03,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:03,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:03,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:03,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:15:03,191 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:03,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:03,196 INFO L85 PathProgramCache]: Analyzing trace with hash 480190040, now seen corresponding path program 1 times [2024-06-21 21:15:03,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:03,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364493101] [2024-06-21 21:15:03,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:03,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:04,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:04,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364493101] [2024-06-21 21:15:04,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364493101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:04,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:04,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:04,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417495420] [2024-06-21 21:15:04,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:04,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:04,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:04,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:04,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:04,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:04,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 145 transitions, 1350 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:04,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:04,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:04,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:05,777 INFO L124 PetriNetUnfolderBase]: 8941/12666 cut-off events. [2024-06-21 21:15:05,778 INFO L125 PetriNetUnfolderBase]: For 225986/225989 co-relation queries the response was YES. [2024-06-21 21:15:05,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69322 conditions, 12666 events. 8941/12666 cut-off events. For 225986/225989 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 71186 event pairs, 3495 based on Foata normal form. 18/12667 useless extension candidates. Maximal degree in co-relation 69277. Up to 11555 conditions per place. [2024-06-21 21:15:05,863 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 142 selfloop transitions, 53 changer transitions 0/202 dead transitions. [2024-06-21 21:15:05,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 202 transitions, 1973 flow [2024-06-21 21:15:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:15:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:15:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 21:15:05,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171568627450981 [2024-06-21 21:15:05,865 INFO L175 Difference]: Start difference. First operand has 111 places, 145 transitions, 1350 flow. Second operand 8 states and 211 transitions. [2024-06-21 21:15:05,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 202 transitions, 1973 flow [2024-06-21 21:15:06,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 202 transitions, 1871 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:06,085 INFO L231 Difference]: Finished difference. Result has 118 places, 154 transitions, 1513 flow [2024-06-21 21:15:06,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1513, PETRI_PLACES=118, PETRI_TRANSITIONS=154} [2024-06-21 21:15:06,086 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2024-06-21 21:15:06,086 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 154 transitions, 1513 flow [2024-06-21 21:15:06,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:06,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:06,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:06,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:15:06,087 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:06,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:06,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1635191559, now seen corresponding path program 2 times [2024-06-21 21:15:06,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:06,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503017573] [2024-06-21 21:15:06,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:06,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:06,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:06,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503017573] [2024-06-21 21:15:06,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503017573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:06,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:06,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:06,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686502919] [2024-06-21 21:15:06,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:06,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:06,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:06,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:06,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:07,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:07,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 154 transitions, 1513 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:07,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:07,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:07,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:08,638 INFO L124 PetriNetUnfolderBase]: 9107/12916 cut-off events. [2024-06-21 21:15:08,638 INFO L125 PetriNetUnfolderBase]: For 242158/242164 co-relation queries the response was YES. [2024-06-21 21:15:08,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71640 conditions, 12916 events. 9107/12916 cut-off events. For 242158/242164 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 72636 event pairs, 3437 based on Foata normal form. 12/12917 useless extension candidates. Maximal degree in co-relation 71592. Up to 11973 conditions per place. [2024-06-21 21:15:08,748 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 135 selfloop transitions, 58 changer transitions 0/200 dead transitions. [2024-06-21 21:15:08,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 200 transitions, 2273 flow [2024-06-21 21:15:08,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 21:15:08,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210084033613446 [2024-06-21 21:15:08,749 INFO L175 Difference]: Start difference. First operand has 118 places, 154 transitions, 1513 flow. Second operand 7 states and 186 transitions. [2024-06-21 21:15:08,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 200 transitions, 2273 flow [2024-06-21 21:15:09,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 200 transitions, 2185 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:09,066 INFO L231 Difference]: Finished difference. Result has 123 places, 164 transitions, 1699 flow [2024-06-21 21:15:09,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1699, PETRI_PLACES=123, PETRI_TRANSITIONS=164} [2024-06-21 21:15:09,067 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2024-06-21 21:15:09,067 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 164 transitions, 1699 flow [2024-06-21 21:15:09,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:09,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:09,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:09,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:15:09,067 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:09,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:09,068 INFO L85 PathProgramCache]: Analyzing trace with hash 631870854, now seen corresponding path program 2 times [2024-06-21 21:15:09,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:09,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614436436] [2024-06-21 21:15:09,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:09,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:09,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:09,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614436436] [2024-06-21 21:15:09,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614436436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:09,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:09,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:09,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886684409] [2024-06-21 21:15:09,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:09,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:09,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:09,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:09,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:09,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:09,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 164 transitions, 1699 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:09,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:09,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:09,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:11,497 INFO L124 PetriNetUnfolderBase]: 9068/12841 cut-off events. [2024-06-21 21:15:11,497 INFO L125 PetriNetUnfolderBase]: For 259135/259138 co-relation queries the response was YES. [2024-06-21 21:15:11,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71978 conditions, 12841 events. 9068/12841 cut-off events. For 259135/259138 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 71984 event pairs, 2539 based on Foata normal form. 18/12832 useless extension candidates. Maximal degree in co-relation 71928. Up to 11036 conditions per place. [2024-06-21 21:15:11,621 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 138 selfloop transitions, 61 changer transitions 0/206 dead transitions. [2024-06-21 21:15:11,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 206 transitions, 2217 flow [2024-06-21 21:15:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 21:15:11,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266106442577031 [2024-06-21 21:15:11,623 INFO L175 Difference]: Start difference. First operand has 123 places, 164 transitions, 1699 flow. Second operand 7 states and 188 transitions. [2024-06-21 21:15:11,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 206 transitions, 2217 flow [2024-06-21 21:15:12,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 206 transitions, 2095 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:12,071 INFO L231 Difference]: Finished difference. Result has 127 places, 164 transitions, 1712 flow [2024-06-21 21:15:12,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1712, PETRI_PLACES=127, PETRI_TRANSITIONS=164} [2024-06-21 21:15:12,071 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 73 predicate places. [2024-06-21 21:15:12,071 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 164 transitions, 1712 flow [2024-06-21 21:15:12,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:12,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:12,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:12,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:15:12,072 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:12,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:12,073 INFO L85 PathProgramCache]: Analyzing trace with hash 921099850, now seen corresponding path program 3 times [2024-06-21 21:15:12,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:12,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590568811] [2024-06-21 21:15:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:12,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:12,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:12,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590568811] [2024-06-21 21:15:12,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590568811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:12,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:12,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:12,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891149696] [2024-06-21 21:15:12,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:12,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:12,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:12,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:12,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:13,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:13,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 164 transitions, 1712 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:13,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:13,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:13,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:14,573 INFO L124 PetriNetUnfolderBase]: 9029/12798 cut-off events. [2024-06-21 21:15:14,573 INFO L125 PetriNetUnfolderBase]: For 274301/274304 co-relation queries the response was YES. [2024-06-21 21:15:14,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72125 conditions, 12798 events. 9029/12798 cut-off events. For 274301/274304 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 71833 event pairs, 2137 based on Foata normal form. 18/12790 useless extension candidates. Maximal degree in co-relation 72074. Up to 10797 conditions per place. [2024-06-21 21:15:14,693 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 132 selfloop transitions, 63 changer transitions 0/202 dead transitions. [2024-06-21 21:15:14,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 202 transitions, 2216 flow [2024-06-21 21:15:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 21:15:14,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-21 21:15:14,695 INFO L175 Difference]: Start difference. First operand has 127 places, 164 transitions, 1712 flow. Second operand 7 states and 181 transitions. [2024-06-21 21:15:14,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 202 transitions, 2216 flow [2024-06-21 21:15:14,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 202 transitions, 2054 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:14,995 INFO L231 Difference]: Finished difference. Result has 127 places, 165 transitions, 1695 flow [2024-06-21 21:15:14,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1695, PETRI_PLACES=127, PETRI_TRANSITIONS=165} [2024-06-21 21:15:14,996 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 73 predicate places. [2024-06-21 21:15:14,996 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 165 transitions, 1695 flow [2024-06-21 21:15:14,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:14,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:14,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:14,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:15:14,997 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:15,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:15,024 INFO L85 PathProgramCache]: Analyzing trace with hash 266353725, now seen corresponding path program 3 times [2024-06-21 21:15:15,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:15,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914955770] [2024-06-21 21:15:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:15,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:15,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:15,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914955770] [2024-06-21 21:15:15,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914955770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:15,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:15,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:15,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174495418] [2024-06-21 21:15:15,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:15,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:15,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:15,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:15,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:15,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:15,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 165 transitions, 1695 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:15,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:15,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:15,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:17,568 INFO L124 PetriNetUnfolderBase]: 9011/12761 cut-off events. [2024-06-21 21:15:17,568 INFO L125 PetriNetUnfolderBase]: For 273414/273435 co-relation queries the response was YES. [2024-06-21 21:15:17,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72310 conditions, 12761 events. 9011/12761 cut-off events. For 273414/273435 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 71382 event pairs, 3423 based on Foata normal form. 22/12765 useless extension candidates. Maximal degree in co-relation 72258. Up to 11851 conditions per place. [2024-06-21 21:15:17,687 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 129 selfloop transitions, 58 changer transitions 0/194 dead transitions. [2024-06-21 21:15:17,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 194 transitions, 2315 flow [2024-06-21 21:15:17,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 21:15:17,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014005602240896 [2024-06-21 21:15:17,689 INFO L175 Difference]: Start difference. First operand has 127 places, 165 transitions, 1695 flow. Second operand 7 states and 179 transitions. [2024-06-21 21:15:17,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 194 transitions, 2315 flow [2024-06-21 21:15:18,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 194 transitions, 2140 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 21:15:18,003 INFO L231 Difference]: Finished difference. Result has 129 places, 165 transitions, 1647 flow [2024-06-21 21:15:18,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1647, PETRI_PLACES=129, PETRI_TRANSITIONS=165} [2024-06-21 21:15:18,004 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2024-06-21 21:15:18,004 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 165 transitions, 1647 flow [2024-06-21 21:15:18,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:18,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:18,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:18,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:15:18,005 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:18,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:18,005 INFO L85 PathProgramCache]: Analyzing trace with hash 375154463, now seen corresponding path program 1 times [2024-06-21 21:15:18,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:18,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92415003] [2024-06-21 21:15:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:18,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:18,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:18,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92415003] [2024-06-21 21:15:18,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92415003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:18,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:18,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:18,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492751085] [2024-06-21 21:15:18,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:18,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:18,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:18,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:18,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:18,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 21:15:18,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 165 transitions, 1647 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:18,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:18,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 21:15:18,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:20,288 INFO L124 PetriNetUnfolderBase]: 7893/11488 cut-off events. [2024-06-21 21:15:20,289 INFO L125 PetriNetUnfolderBase]: For 242017/242017 co-relation queries the response was YES. [2024-06-21 21:15:20,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64273 conditions, 11488 events. 7893/11488 cut-off events. For 242017/242017 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 66621 event pairs, 2912 based on Foata normal form. 4/11487 useless extension candidates. Maximal degree in co-relation 64220. Up to 10846 conditions per place. [2024-06-21 21:15:20,382 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 172 selfloop transitions, 18 changer transitions 0/198 dead transitions. [2024-06-21 21:15:20,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 198 transitions, 2153 flow [2024-06-21 21:15:20,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:20,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:20,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 21:15:20,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49299719887955185 [2024-06-21 21:15:20,384 INFO L175 Difference]: Start difference. First operand has 129 places, 165 transitions, 1647 flow. Second operand 7 states and 176 transitions. [2024-06-21 21:15:20,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 198 transitions, 2153 flow [2024-06-21 21:15:20,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 198 transitions, 1994 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 21:15:20,631 INFO L231 Difference]: Finished difference. Result has 130 places, 169 transitions, 1593 flow [2024-06-21 21:15:20,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1593, PETRI_PLACES=130, PETRI_TRANSITIONS=169} [2024-06-21 21:15:20,631 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 76 predicate places. [2024-06-21 21:15:20,631 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 169 transitions, 1593 flow [2024-06-21 21:15:20,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:20,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:20,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:20,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:15:20,632 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:20,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:20,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1812507777, now seen corresponding path program 2 times [2024-06-21 21:15:20,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:20,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574976622] [2024-06-21 21:15:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:20,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:21,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:21,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574976622] [2024-06-21 21:15:21,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574976622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:21,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:21,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:21,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496620884] [2024-06-21 21:15:21,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:21,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:21,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:21,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:21,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:21,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 21:15:21,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 169 transitions, 1593 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:21,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:21,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 21:15:21,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:23,028 INFO L124 PetriNetUnfolderBase]: 7925/11554 cut-off events. [2024-06-21 21:15:23,028 INFO L125 PetriNetUnfolderBase]: For 260813/260813 co-relation queries the response was YES. [2024-06-21 21:15:23,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65928 conditions, 11554 events. 7925/11554 cut-off events. For 260813/260813 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 67037 event pairs, 2860 based on Foata normal form. 4/11548 useless extension candidates. Maximal degree in co-relation 65876. Up to 10777 conditions per place. [2024-06-21 21:15:23,120 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 165 selfloop transitions, 35 changer transitions 0/208 dead transitions. [2024-06-21 21:15:23,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 208 transitions, 2285 flow [2024-06-21 21:15:23,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:23,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:23,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 21:15:23,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-21 21:15:23,122 INFO L175 Difference]: Start difference. First operand has 130 places, 169 transitions, 1593 flow. Second operand 7 states and 182 transitions. [2024-06-21 21:15:23,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 208 transitions, 2285 flow [2024-06-21 21:15:23,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 208 transitions, 2210 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 21:15:23,369 INFO L231 Difference]: Finished difference. Result has 132 places, 177 transitions, 1725 flow [2024-06-21 21:15:23,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1725, PETRI_PLACES=132, PETRI_TRANSITIONS=177} [2024-06-21 21:15:23,369 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 78 predicate places. [2024-06-21 21:15:23,369 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 177 transitions, 1725 flow [2024-06-21 21:15:23,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:23,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:23,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:23,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:15:23,370 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:23,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:23,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1485586143, now seen corresponding path program 3 times [2024-06-21 21:15:23,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:23,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663591884] [2024-06-21 21:15:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:23,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:24,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:24,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663591884] [2024-06-21 21:15:24,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663591884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:24,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:24,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:24,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542831872] [2024-06-21 21:15:24,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:24,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:24,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:24,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:24,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:24,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 21:15:24,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 177 transitions, 1725 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:24,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:24,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 21:15:24,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:25,880 INFO L124 PetriNetUnfolderBase]: 7911/11538 cut-off events. [2024-06-21 21:15:25,881 INFO L125 PetriNetUnfolderBase]: For 283495/283498 co-relation queries the response was YES. [2024-06-21 21:15:25,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68035 conditions, 11538 events. 7911/11538 cut-off events. For 283495/283498 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 66864 event pairs, 2830 based on Foata normal form. 4/11535 useless extension candidates. Maximal degree in co-relation 67982. Up to 10765 conditions per place. [2024-06-21 21:15:25,993 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 159 selfloop transitions, 35 changer transitions 0/202 dead transitions. [2024-06-21 21:15:25,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 202 transitions, 2175 flow [2024-06-21 21:15:25,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 21:15:25,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49299719887955185 [2024-06-21 21:15:25,995 INFO L175 Difference]: Start difference. First operand has 132 places, 177 transitions, 1725 flow. Second operand 7 states and 176 transitions. [2024-06-21 21:15:25,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 202 transitions, 2175 flow [2024-06-21 21:15:26,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 202 transitions, 2067 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:26,292 INFO L231 Difference]: Finished difference. Result has 136 places, 177 transitions, 1696 flow [2024-06-21 21:15:26,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1696, PETRI_PLACES=136, PETRI_TRANSITIONS=177} [2024-06-21 21:15:26,293 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2024-06-21 21:15:26,293 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 177 transitions, 1696 flow [2024-06-21 21:15:26,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:26,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:26,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:26,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:15:26,294 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:26,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:26,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1989885561, now seen corresponding path program 1 times [2024-06-21 21:15:26,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:26,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782285424] [2024-06-21 21:15:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:26,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:27,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:27,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782285424] [2024-06-21 21:15:27,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782285424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:27,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:27,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:27,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282320301] [2024-06-21 21:15:27,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:27,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:27,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:27,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:27,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:27,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 21:15:27,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 177 transitions, 1696 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:27,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:27,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 21:15:27,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:28,985 INFO L124 PetriNetUnfolderBase]: 7899/11526 cut-off events. [2024-06-21 21:15:28,985 INFO L125 PetriNetUnfolderBase]: For 299010/299010 co-relation queries the response was YES. [2024-06-21 21:15:29,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68096 conditions, 11526 events. 7899/11526 cut-off events. For 299010/299010 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 66977 event pairs, 2850 based on Foata normal form. 4/11527 useless extension candidates. Maximal degree in co-relation 68041. Up to 10866 conditions per place. [2024-06-21 21:15:29,086 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 182 selfloop transitions, 17 changer transitions 0/207 dead transitions. [2024-06-21 21:15:29,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 207 transitions, 2248 flow [2024-06-21 21:15:29,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:29,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:29,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 21:15:29,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733893557422969 [2024-06-21 21:15:29,087 INFO L175 Difference]: Start difference. First operand has 136 places, 177 transitions, 1696 flow. Second operand 7 states and 169 transitions. [2024-06-21 21:15:29,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 207 transitions, 2248 flow [2024-06-21 21:15:29,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 207 transitions, 2131 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:15:29,483 INFO L231 Difference]: Finished difference. Result has 137 places, 184 transitions, 1730 flow [2024-06-21 21:15:29,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1730, PETRI_PLACES=137, PETRI_TRANSITIONS=184} [2024-06-21 21:15:29,483 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 83 predicate places. [2024-06-21 21:15:29,483 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 184 transitions, 1730 flow [2024-06-21 21:15:29,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:29,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:29,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:29,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:15:29,484 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:29,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:29,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1146475545, now seen corresponding path program 1 times [2024-06-21 21:15:29,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:29,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681589792] [2024-06-21 21:15:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:29,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:30,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:30,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681589792] [2024-06-21 21:15:30,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681589792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:30,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:30,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:15:30,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290209248] [2024-06-21 21:15:30,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:30,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:15:30,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:30,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:15:30,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:15:30,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-21 21:15:30,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 184 transitions, 1730 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:30,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:30,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-21 21:15:30,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:31,405 INFO L124 PetriNetUnfolderBase]: 7485/11166 cut-off events. [2024-06-21 21:15:31,405 INFO L125 PetriNetUnfolderBase]: For 310327/310463 co-relation queries the response was YES. [2024-06-21 21:15:31,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68315 conditions, 11166 events. 7485/11166 cut-off events. For 310327/310463 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 67266 event pairs, 2674 based on Foata normal form. 1/11048 useless extension candidates. Maximal degree in co-relation 68259. Up to 10224 conditions per place. [2024-06-21 21:15:31,511 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 169 selfloop transitions, 10 changer transitions 0/199 dead transitions. [2024-06-21 21:15:31,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 199 transitions, 2170 flow [2024-06-21 21:15:31,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:15:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:15:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 21:15:31,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-21 21:15:31,512 INFO L175 Difference]: Start difference. First operand has 137 places, 184 transitions, 1730 flow. Second operand 5 states and 125 transitions. [2024-06-21 21:15:31,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 199 transitions, 2170 flow [2024-06-21 21:15:31,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 199 transitions, 2088 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:31,901 INFO L231 Difference]: Finished difference. Result has 138 places, 188 transitions, 1737 flow [2024-06-21 21:15:31,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1648, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1737, PETRI_PLACES=138, PETRI_TRANSITIONS=188} [2024-06-21 21:15:31,903 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 84 predicate places. [2024-06-21 21:15:31,903 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 188 transitions, 1737 flow [2024-06-21 21:15:31,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:31,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:31,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:31,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:15:31,904 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:31,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:31,904 INFO L85 PathProgramCache]: Analyzing trace with hash -854378124, now seen corresponding path program 1 times [2024-06-21 21:15:31,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:31,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554641917] [2024-06-21 21:15:31,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:31,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:32,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:32,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554641917] [2024-06-21 21:15:32,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554641917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:32,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:32,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:32,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869244859] [2024-06-21 21:15:32,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:32,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:32,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:32,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:32,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:32,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:32,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 188 transitions, 1737 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:32,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:32,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:32,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:34,569 INFO L124 PetriNetUnfolderBase]: 9197/13025 cut-off events. [2024-06-21 21:15:34,569 INFO L125 PetriNetUnfolderBase]: For 404635/404644 co-relation queries the response was YES. [2024-06-21 21:15:34,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83203 conditions, 13025 events. 9197/13025 cut-off events. For 404635/404644 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 72918 event pairs, 3364 based on Foata normal form. 12/13029 useless extension candidates. Maximal degree in co-relation 83146. Up to 11993 conditions per place. [2024-06-21 21:15:34,708 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 158 selfloop transitions, 75 changer transitions 0/240 dead transitions. [2024-06-21 21:15:34,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 240 transitions, 2707 flow [2024-06-21 21:15:34,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 21:15:34,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266106442577031 [2024-06-21 21:15:34,710 INFO L175 Difference]: Start difference. First operand has 138 places, 188 transitions, 1737 flow. Second operand 7 states and 188 transitions. [2024-06-21 21:15:34,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 240 transitions, 2707 flow [2024-06-21 21:15:35,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 240 transitions, 2646 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:35,179 INFO L231 Difference]: Finished difference. Result has 143 places, 201 transitions, 2042 flow [2024-06-21 21:15:35,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2042, PETRI_PLACES=143, PETRI_TRANSITIONS=201} [2024-06-21 21:15:35,180 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 89 predicate places. [2024-06-21 21:15:35,180 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 201 transitions, 2042 flow [2024-06-21 21:15:35,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:35,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:35,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:35,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:15:35,181 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:35,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:35,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1893276150, now seen corresponding path program 2 times [2024-06-21 21:15:35,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:35,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410667194] [2024-06-21 21:15:35,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:35,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:36,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:36,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410667194] [2024-06-21 21:15:36,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410667194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:36,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:36,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:36,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498040253] [2024-06-21 21:15:36,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:36,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:36,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:36,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:36,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:36,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:36,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 201 transitions, 2042 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:36,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:36,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:36,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:37,994 INFO L124 PetriNetUnfolderBase]: 9169/12985 cut-off events. [2024-06-21 21:15:37,995 INFO L125 PetriNetUnfolderBase]: For 423984/423993 co-relation queries the response was YES. [2024-06-21 21:15:38,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84443 conditions, 12985 events. 9169/12985 cut-off events. For 423984/423993 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 72693 event pairs, 3339 based on Foata normal form. 12/12989 useless extension candidates. Maximal degree in co-relation 84384. Up to 11973 conditions per place. [2024-06-21 21:15:38,099 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 159 selfloop transitions, 71 changer transitions 0/237 dead transitions. [2024-06-21 21:15:38,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 237 transitions, 2826 flow [2024-06-21 21:15:38,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:38,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 21:15:38,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182072829131653 [2024-06-21 21:15:38,101 INFO L175 Difference]: Start difference. First operand has 143 places, 201 transitions, 2042 flow. Second operand 7 states and 185 transitions. [2024-06-21 21:15:38,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 237 transitions, 2826 flow [2024-06-21 21:15:38,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 237 transitions, 2705 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 21:15:38,564 INFO L231 Difference]: Finished difference. Result has 147 places, 201 transitions, 2075 flow [2024-06-21 21:15:38,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2075, PETRI_PLACES=147, PETRI_TRANSITIONS=201} [2024-06-21 21:15:38,564 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 93 predicate places. [2024-06-21 21:15:38,564 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 201 transitions, 2075 flow [2024-06-21 21:15:38,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:38,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:38,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:38,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:15:38,565 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:38,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:38,565 INFO L85 PathProgramCache]: Analyzing trace with hash -60445024, now seen corresponding path program 3 times [2024-06-21 21:15:38,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:38,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216220881] [2024-06-21 21:15:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:38,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:39,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:39,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216220881] [2024-06-21 21:15:39,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216220881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:39,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:39,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:39,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977581291] [2024-06-21 21:15:39,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:39,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:39,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:39,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:39,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:39,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:39,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 201 transitions, 2075 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:39,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:39,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:39,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:41,236 INFO L124 PetriNetUnfolderBase]: 9145/12931 cut-off events. [2024-06-21 21:15:41,236 INFO L125 PetriNetUnfolderBase]: For 446130/446139 co-relation queries the response was YES. [2024-06-21 21:15:41,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84870 conditions, 12931 events. 9145/12931 cut-off events. For 446130/446139 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 72156 event pairs, 3375 based on Foata normal form. 8/12920 useless extension candidates. Maximal degree in co-relation 84810. Up to 11953 conditions per place. [2024-06-21 21:15:41,363 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 152 selfloop transitions, 78 changer transitions 0/237 dead transitions. [2024-06-21 21:15:41,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 237 transitions, 2867 flow [2024-06-21 21:15:41,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 21:15:41,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182072829131653 [2024-06-21 21:15:41,364 INFO L175 Difference]: Start difference. First operand has 147 places, 201 transitions, 2075 flow. Second operand 7 states and 185 transitions. [2024-06-21 21:15:41,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 237 transitions, 2867 flow [2024-06-21 21:15:41,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 237 transitions, 2710 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:41,875 INFO L231 Difference]: Finished difference. Result has 150 places, 201 transitions, 2083 flow [2024-06-21 21:15:41,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2083, PETRI_PLACES=150, PETRI_TRANSITIONS=201} [2024-06-21 21:15:41,876 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 96 predicate places. [2024-06-21 21:15:41,876 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 201 transitions, 2083 flow [2024-06-21 21:15:41,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:41,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:41,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:41,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:15:41,877 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:41,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:41,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2103856050, now seen corresponding path program 4 times [2024-06-21 21:15:41,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:41,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943120429] [2024-06-21 21:15:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:41,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:42,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:42,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943120429] [2024-06-21 21:15:42,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943120429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:42,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:42,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:42,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031535099] [2024-06-21 21:15:42,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:42,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:42,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:42,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:42,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:42,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:42,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 201 transitions, 2083 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:42,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:42,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:42,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:44,430 INFO L124 PetriNetUnfolderBase]: 9177/12978 cut-off events. [2024-06-21 21:15:44,430 INFO L125 PetriNetUnfolderBase]: For 470429/470438 co-relation queries the response was YES. [2024-06-21 21:15:44,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85961 conditions, 12978 events. 9177/12978 cut-off events. For 470429/470438 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 72544 event pairs, 3382 based on Foata normal form. 8/12967 useless extension candidates. Maximal degree in co-relation 85900. Up to 11972 conditions per place. [2024-06-21 21:15:44,572 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 147 selfloop transitions, 82 changer transitions 0/236 dead transitions. [2024-06-21 21:15:44,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 236 transitions, 2820 flow [2024-06-21 21:15:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 21:15:44,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-21 21:15:44,574 INFO L175 Difference]: Start difference. First operand has 150 places, 201 transitions, 2083 flow. Second operand 7 states and 181 transitions. [2024-06-21 21:15:44,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 236 transitions, 2820 flow [2024-06-21 21:15:45,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 236 transitions, 2479 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 21:15:45,480 INFO L231 Difference]: Finished difference. Result has 148 places, 205 transitions, 1988 flow [2024-06-21 21:15:45,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1988, PETRI_PLACES=148, PETRI_TRANSITIONS=205} [2024-06-21 21:15:45,480 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 94 predicate places. [2024-06-21 21:15:45,480 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 205 transitions, 1988 flow [2024-06-21 21:15:45,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:45,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:45,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:45,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:15:45,481 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:45,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:45,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1191476522, now seen corresponding path program 5 times [2024-06-21 21:15:45,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:45,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261500295] [2024-06-21 21:15:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:45,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:46,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:46,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261500295] [2024-06-21 21:15:46,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261500295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:46,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:46,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:46,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559406255] [2024-06-21 21:15:46,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:46,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:46,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:46,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:46,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:46,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:46,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 205 transitions, 1988 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:46,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:46,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:46,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:48,003 INFO L124 PetriNetUnfolderBase]: 9163/12968 cut-off events. [2024-06-21 21:15:48,004 INFO L125 PetriNetUnfolderBase]: For 489257/489272 co-relation queries the response was YES. [2024-06-21 21:15:48,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86050 conditions, 12968 events. 9163/12968 cut-off events. For 489257/489272 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 72570 event pairs, 3348 based on Foata normal form. 14/12964 useless extension candidates. Maximal degree in co-relation 85989. Up to 11964 conditions per place. [2024-06-21 21:15:48,132 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 148 selfloop transitions, 77 changer transitions 0/232 dead transitions. [2024-06-21 21:15:48,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 232 transitions, 2636 flow [2024-06-21 21:15:48,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 21:15:48,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49299719887955185 [2024-06-21 21:15:48,134 INFO L175 Difference]: Start difference. First operand has 148 places, 205 transitions, 1988 flow. Second operand 7 states and 176 transitions. [2024-06-21 21:15:48,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 232 transitions, 2636 flow [2024-06-21 21:15:48,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 232 transitions, 2468 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 21:15:48,747 INFO L231 Difference]: Finished difference. Result has 151 places, 205 transitions, 1983 flow [2024-06-21 21:15:48,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1983, PETRI_PLACES=151, PETRI_TRANSITIONS=205} [2024-06-21 21:15:48,747 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 97 predicate places. [2024-06-21 21:15:48,747 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 205 transitions, 1983 flow [2024-06-21 21:15:48,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:48,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:48,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:48,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:15:48,748 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:48,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:48,748 INFO L85 PathProgramCache]: Analyzing trace with hash -332964098, now seen corresponding path program 6 times [2024-06-21 21:15:48,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:48,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675780992] [2024-06-21 21:15:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:48,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:49,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:49,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675780992] [2024-06-21 21:15:49,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675780992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:49,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:49,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:15:49,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561073994] [2024-06-21 21:15:49,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:49,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:15:49,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:49,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:15:49,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:15:49,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:49,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 205 transitions, 1983 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:49,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:49,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:49,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:51,559 INFO L124 PetriNetUnfolderBase]: 9125/12914 cut-off events. [2024-06-21 21:15:51,559 INFO L125 PetriNetUnfolderBase]: For 512272/512287 co-relation queries the response was YES. [2024-06-21 21:15:51,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86223 conditions, 12914 events. 9125/12914 cut-off events. For 512272/512287 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 72222 event pairs, 3346 based on Foata normal form. 18/12914 useless extension candidates. Maximal degree in co-relation 86161. Up to 11932 conditions per place. [2024-06-21 21:15:51,678 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 150 selfloop transitions, 73 changer transitions 0/230 dead transitions. [2024-06-21 21:15:51,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 230 transitions, 2497 flow [2024-06-21 21:15:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:15:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:15:51,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 21:15:51,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-21 21:15:51,680 INFO L175 Difference]: Start difference. First operand has 151 places, 205 transitions, 1983 flow. Second operand 7 states and 175 transitions. [2024-06-21 21:15:51,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 230 transitions, 2497 flow [2024-06-21 21:15:52,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 230 transitions, 2306 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 21:15:52,300 INFO L231 Difference]: Finished difference. Result has 153 places, 205 transitions, 1949 flow [2024-06-21 21:15:52,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1792, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1949, PETRI_PLACES=153, PETRI_TRANSITIONS=205} [2024-06-21 21:15:52,300 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 99 predicate places. [2024-06-21 21:15:52,300 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 205 transitions, 1949 flow [2024-06-21 21:15:52,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:52,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:52,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:52,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:15:52,301 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:52,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:52,301 INFO L85 PathProgramCache]: Analyzing trace with hash -951306784, now seen corresponding path program 1 times [2024-06-21 21:15:52,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:52,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068942089] [2024-06-21 21:15:52,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:52,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:53,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:53,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068942089] [2024-06-21 21:15:53,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068942089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:53,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:53,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:53,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517698341] [2024-06-21 21:15:53,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:53,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:53,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:53,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:53,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:53,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:53,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 205 transitions, 1949 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:53,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:53,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:53,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:55,382 INFO L124 PetriNetUnfolderBase]: 10531/14974 cut-off events. [2024-06-21 21:15:55,382 INFO L125 PetriNetUnfolderBase]: For 591819/591840 co-relation queries the response was YES. [2024-06-21 21:15:55,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99074 conditions, 14974 events. 10531/14974 cut-off events. For 591819/591840 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 85697 event pairs, 3400 based on Foata normal form. 48/15014 useless extension candidates. Maximal degree in co-relation 99011. Up to 12710 conditions per place. [2024-06-21 21:15:55,536 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 204 selfloop transitions, 154 changer transitions 0/365 dead transitions. [2024-06-21 21:15:55,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 365 transitions, 4085 flow [2024-06-21 21:15:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:15:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:15:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-21 21:15:55,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381263616557734 [2024-06-21 21:15:55,538 INFO L175 Difference]: Start difference. First operand has 153 places, 205 transitions, 1949 flow. Second operand 9 states and 247 transitions. [2024-06-21 21:15:55,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 365 transitions, 4085 flow [2024-06-21 21:15:56,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 365 transitions, 3736 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:15:56,550 INFO L231 Difference]: Finished difference. Result has 159 places, 293 transitions, 3088 flow [2024-06-21 21:15:56,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3088, PETRI_PLACES=159, PETRI_TRANSITIONS=293} [2024-06-21 21:15:56,551 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 105 predicate places. [2024-06-21 21:15:56,551 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 293 transitions, 3088 flow [2024-06-21 21:15:56,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:56,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:56,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:56,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:15:56,551 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:15:56,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:56,554 INFO L85 PathProgramCache]: Analyzing trace with hash -834366684, now seen corresponding path program 2 times [2024-06-21 21:15:56,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:56,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705507322] [2024-06-21 21:15:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:56,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:57,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:57,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705507322] [2024-06-21 21:15:57,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705507322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:57,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:57,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:15:57,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786621615] [2024-06-21 21:15:57,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:57,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:15:57,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:57,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:15:57,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:15:57,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:15:57,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 293 transitions, 3088 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:57,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:57,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:15:57,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:59,967 INFO L124 PetriNetUnfolderBase]: 11011/15681 cut-off events. [2024-06-21 21:15:59,967 INFO L125 PetriNetUnfolderBase]: For 664813/664838 co-relation queries the response was YES. [2024-06-21 21:16:00,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108953 conditions, 15681 events. 11011/15681 cut-off events. For 664813/664838 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 90297 event pairs, 2941 based on Foata normal form. 52/15725 useless extension candidates. Maximal degree in co-relation 108885. Up to 12653 conditions per place. [2024-06-21 21:16:00,132 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 175 selfloop transitions, 175 changer transitions 0/357 dead transitions. [2024-06-21 21:16:00,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 357 transitions, 4286 flow [2024-06-21 21:16:00,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-21 21:16:00,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367647058823529 [2024-06-21 21:16:00,134 INFO L175 Difference]: Start difference. First operand has 159 places, 293 transitions, 3088 flow. Second operand 8 states and 219 transitions. [2024-06-21 21:16:00,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 357 transitions, 4286 flow [2024-06-21 21:16:01,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 357 transitions, 4227 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 21:16:01,382 INFO L231 Difference]: Finished difference. Result has 166 places, 301 transitions, 3588 flow [2024-06-21 21:16:01,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3588, PETRI_PLACES=166, PETRI_TRANSITIONS=301} [2024-06-21 21:16:01,382 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 112 predicate places. [2024-06-21 21:16:01,382 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 301 transitions, 3588 flow [2024-06-21 21:16:01,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:01,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:01,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:01,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:16:01,383 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:01,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:01,383 INFO L85 PathProgramCache]: Analyzing trace with hash -825795804, now seen corresponding path program 3 times [2024-06-21 21:16:01,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:01,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512658569] [2024-06-21 21:16:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:01,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:02,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:02,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512658569] [2024-06-21 21:16:02,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512658569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:02,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:02,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:02,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559112258] [2024-06-21 21:16:02,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:02,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:02,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:02,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:02,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:02,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:16:02,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 301 transitions, 3588 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:02,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:02,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:16:02,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:05,059 INFO L124 PetriNetUnfolderBase]: 11511/16385 cut-off events. [2024-06-21 21:16:05,060 INFO L125 PetriNetUnfolderBase]: For 757262/757287 co-relation queries the response was YES. [2024-06-21 21:16:05,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118424 conditions, 16385 events. 11511/16385 cut-off events. For 757262/757287 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 94953 event pairs, 3618 based on Foata normal form. 100/16477 useless extension candidates. Maximal degree in co-relation 118353. Up to 14200 conditions per place. [2024-06-21 21:16:05,299 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 185 selfloop transitions, 164 changer transitions 0/356 dead transitions. [2024-06-21 21:16:05,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 356 transitions, 4617 flow [2024-06-21 21:16:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:05,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-21 21:16:05,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196078431372549 [2024-06-21 21:16:05,314 INFO L175 Difference]: Start difference. First operand has 166 places, 301 transitions, 3588 flow. Second operand 8 states and 212 transitions. [2024-06-21 21:16:05,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 356 transitions, 4617 flow [2024-06-21 21:16:06,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 356 transitions, 4365 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 21:16:06,989 INFO L231 Difference]: Finished difference. Result has 169 places, 307 transitions, 3843 flow [2024-06-21 21:16:06,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3843, PETRI_PLACES=169, PETRI_TRANSITIONS=307} [2024-06-21 21:16:06,990 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 115 predicate places. [2024-06-21 21:16:06,990 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 307 transitions, 3843 flow [2024-06-21 21:16:06,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:06,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:06,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:06,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:16:06,990 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:06,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:06,999 INFO L85 PathProgramCache]: Analyzing trace with hash 526299578, now seen corresponding path program 4 times [2024-06-21 21:16:06,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:06,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762167284] [2024-06-21 21:16:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:06,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:07,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:07,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762167284] [2024-06-21 21:16:07,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762167284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:07,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:07,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:07,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023845305] [2024-06-21 21:16:07,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:07,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:07,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:07,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:07,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:08,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:16:08,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 307 transitions, 3843 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:08,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:08,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:16:08,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:10,863 INFO L124 PetriNetUnfolderBase]: 11873/16879 cut-off events. [2024-06-21 21:16:10,863 INFO L125 PetriNetUnfolderBase]: For 754884/754895 co-relation queries the response was YES. [2024-06-21 21:16:10,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121969 conditions, 16879 events. 11873/16879 cut-off events. For 754884/754895 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 98110 event pairs, 3654 based on Foata normal form. 84/16955 useless extension candidates. Maximal degree in co-relation 121897. Up to 14714 conditions per place. [2024-06-21 21:16:11,086 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 201 selfloop transitions, 147 changer transitions 0/355 dead transitions. [2024-06-21 21:16:11,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 355 transitions, 4852 flow [2024-06-21 21:16:11,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 21:16:11,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049019607843137 [2024-06-21 21:16:11,091 INFO L175 Difference]: Start difference. First operand has 169 places, 307 transitions, 3843 flow. Second operand 8 states and 206 transitions. [2024-06-21 21:16:11,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 355 transitions, 4852 flow [2024-06-21 21:16:12,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 355 transitions, 4480 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:16:12,645 INFO L231 Difference]: Finished difference. Result has 171 places, 313 transitions, 3954 flow [2024-06-21 21:16:12,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3954, PETRI_PLACES=171, PETRI_TRANSITIONS=313} [2024-06-21 21:16:12,646 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 117 predicate places. [2024-06-21 21:16:12,646 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 313 transitions, 3954 flow [2024-06-21 21:16:12,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:12,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:12,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:12,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:16:12,647 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:12,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:12,647 INFO L85 PathProgramCache]: Analyzing trace with hash -545219082, now seen corresponding path program 1 times [2024-06-21 21:16:12,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:12,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167185917] [2024-06-21 21:16:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:12,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:13,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:13,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167185917] [2024-06-21 21:16:13,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167185917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:13,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:13,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:13,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206235935] [2024-06-21 21:16:13,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:13,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:13,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:13,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:13,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:13,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:16:13,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 313 transitions, 3954 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:13,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:13,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:16:13,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:16,663 INFO L124 PetriNetUnfolderBase]: 11937/16960 cut-off events. [2024-06-21 21:16:16,664 INFO L125 PetriNetUnfolderBase]: For 737254/737259 co-relation queries the response was YES. [2024-06-21 21:16:16,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122700 conditions, 16960 events. 11937/16960 cut-off events. For 737254/737259 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 98710 event pairs, 3894 based on Foata normal form. 8/16961 useless extension candidates. Maximal degree in co-relation 122627. Up to 15974 conditions per place. [2024-06-21 21:16:16,823 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 291 selfloop transitions, 61 changer transitions 0/359 dead transitions. [2024-06-21 21:16:16,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 359 transitions, 4876 flow [2024-06-21 21:16:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 21:16:16,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024509803921569 [2024-06-21 21:16:16,832 INFO L175 Difference]: Start difference. First operand has 171 places, 313 transitions, 3954 flow. Second operand 8 states and 205 transitions. [2024-06-21 21:16:16,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 359 transitions, 4876 flow [2024-06-21 21:16:18,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 359 transitions, 4526 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 21:16:18,197 INFO L231 Difference]: Finished difference. Result has 173 places, 318 transitions, 3826 flow [2024-06-21 21:16:18,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3604, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3826, PETRI_PLACES=173, PETRI_TRANSITIONS=318} [2024-06-21 21:16:18,198 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 119 predicate places. [2024-06-21 21:16:18,198 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 318 transitions, 3826 flow [2024-06-21 21:16:18,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:18,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:18,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:18,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:16:18,199 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:18,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:18,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1079107904, now seen corresponding path program 2 times [2024-06-21 21:16:18,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:18,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923476461] [2024-06-21 21:16:18,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:18,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:19,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:19,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923476461] [2024-06-21 21:16:19,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923476461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:19,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:19,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:19,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591444654] [2024-06-21 21:16:19,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:19,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:19,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:19,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:19,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:19,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:16:19,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 318 transitions, 3826 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:19,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:19,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:16:19,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:22,389 INFO L124 PetriNetUnfolderBase]: 12093/17187 cut-off events. [2024-06-21 21:16:22,389 INFO L125 PetriNetUnfolderBase]: For 767008/767016 co-relation queries the response was YES. [2024-06-21 21:16:22,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125563 conditions, 17187 events. 12093/17187 cut-off events. For 767008/767016 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 100300 event pairs, 3640 based on Foata normal form. 8/17185 useless extension candidates. Maximal degree in co-relation 125489. Up to 14801 conditions per place. [2024-06-21 21:16:22,576 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 205 selfloop transitions, 167 changer transitions 0/379 dead transitions. [2024-06-21 21:16:22,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 379 transitions, 5292 flow [2024-06-21 21:16:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 21:16:22,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269607843137255 [2024-06-21 21:16:22,578 INFO L175 Difference]: Start difference. First operand has 173 places, 318 transitions, 3826 flow. Second operand 8 states and 215 transitions. [2024-06-21 21:16:22,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 379 transitions, 5292 flow [2024-06-21 21:16:23,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 379 transitions, 5052 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 21:16:23,989 INFO L231 Difference]: Finished difference. Result has 175 places, 332 transitions, 4237 flow [2024-06-21 21:16:23,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3586, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4237, PETRI_PLACES=175, PETRI_TRANSITIONS=332} [2024-06-21 21:16:23,990 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 121 predicate places. [2024-06-21 21:16:23,991 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 332 transitions, 4237 flow [2024-06-21 21:16:23,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:23,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:23,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:23,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:16:23,991 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:23,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:23,992 INFO L85 PathProgramCache]: Analyzing trace with hash -538785342, now seen corresponding path program 3 times [2024-06-21 21:16:23,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:23,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334245924] [2024-06-21 21:16:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:23,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:24,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:24,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334245924] [2024-06-21 21:16:24,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334245924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:24,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:24,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:24,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520345170] [2024-06-21 21:16:24,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:24,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:24,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:24,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:24,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:24,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:16:24,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 332 transitions, 4237 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:24,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:24,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:16:24,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:28,095 INFO L124 PetriNetUnfolderBase]: 12249/17444 cut-off events. [2024-06-21 21:16:28,095 INFO L125 PetriNetUnfolderBase]: For 833194/833202 co-relation queries the response was YES. [2024-06-21 21:16:28,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132385 conditions, 17444 events. 12249/17444 cut-off events. For 833194/833202 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 102423 event pairs, 3673 based on Foata normal form. 8/17442 useless extension candidates. Maximal degree in co-relation 132309. Up to 14917 conditions per place. [2024-06-21 21:16:28,273 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 211 selfloop transitions, 167 changer transitions 0/385 dead transitions. [2024-06-21 21:16:28,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 385 transitions, 5668 flow [2024-06-21 21:16:28,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 21:16:28,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171568627450981 [2024-06-21 21:16:28,276 INFO L175 Difference]: Start difference. First operand has 175 places, 332 transitions, 4237 flow. Second operand 8 states and 211 transitions. [2024-06-21 21:16:28,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 385 transitions, 5668 flow [2024-06-21 21:16:30,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 385 transitions, 5486 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-21 21:16:30,118 INFO L231 Difference]: Finished difference. Result has 180 places, 341 transitions, 4585 flow [2024-06-21 21:16:30,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4585, PETRI_PLACES=180, PETRI_TRANSITIONS=341} [2024-06-21 21:16:30,120 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 126 predicate places. [2024-06-21 21:16:30,120 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 341 transitions, 4585 flow [2024-06-21 21:16:30,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:30,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:30,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:30,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:16:30,121 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:30,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:30,121 INFO L85 PathProgramCache]: Analyzing trace with hash -538539078, now seen corresponding path program 1 times [2024-06-21 21:16:30,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:30,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362586389] [2024-06-21 21:16:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:30,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:31,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:31,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362586389] [2024-06-21 21:16:31,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362586389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:31,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:31,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:31,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393560308] [2024-06-21 21:16:31,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:31,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:31,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:31,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:31,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:31,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:16:31,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 341 transitions, 4585 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:31,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:31,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:16:31,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:34,401 INFO L124 PetriNetUnfolderBase]: 12276/17464 cut-off events. [2024-06-21 21:16:34,401 INFO L125 PetriNetUnfolderBase]: For 865462/865475 co-relation queries the response was YES. [2024-06-21 21:16:34,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134371 conditions, 17464 events. 12276/17464 cut-off events. For 865462/865475 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 102194 event pairs, 3800 based on Foata normal form. 14/17473 useless extension candidates. Maximal degree in co-relation 134293. Up to 16703 conditions per place. [2024-06-21 21:16:34,578 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 340 selfloop transitions, 41 changer transitions 0/388 dead transitions. [2024-06-21 21:16:34,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 388 transitions, 5635 flow [2024-06-21 21:16:34,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:34,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:34,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 21:16:34,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47549019607843135 [2024-06-21 21:16:34,588 INFO L175 Difference]: Start difference. First operand has 180 places, 341 transitions, 4585 flow. Second operand 8 states and 194 transitions. [2024-06-21 21:16:34,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 388 transitions, 5635 flow [2024-06-21 21:16:36,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 388 transitions, 5375 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 21:16:36,349 INFO L231 Difference]: Finished difference. Result has 185 places, 350 transitions, 4587 flow [2024-06-21 21:16:36,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4328, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4587, PETRI_PLACES=185, PETRI_TRANSITIONS=350} [2024-06-21 21:16:36,351 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 131 predicate places. [2024-06-21 21:16:36,351 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 350 transitions, 4587 flow [2024-06-21 21:16:36,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:36,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:36,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:36,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:16:36,352 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:36,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:36,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2060716040, now seen corresponding path program 1 times [2024-06-21 21:16:36,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:36,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060113507] [2024-06-21 21:16:36,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:36,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:37,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:37,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060113507] [2024-06-21 21:16:37,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060113507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:37,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:37,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:16:37,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256597744] [2024-06-21 21:16:37,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:37,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:16:37,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:37,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:16:37,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:16:37,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 21:16:37,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 350 transitions, 4587 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:37,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:37,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 21:16:37,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:40,024 INFO L124 PetriNetUnfolderBase]: 11539/16703 cut-off events. [2024-06-21 21:16:40,025 INFO L125 PetriNetUnfolderBase]: For 891268/891478 co-relation queries the response was YES. [2024-06-21 21:16:40,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131006 conditions, 16703 events. 11539/16703 cut-off events. For 891268/891478 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 101588 event pairs, 3664 based on Foata normal form. 11/16531 useless extension candidates. Maximal degree in co-relation 130926. Up to 15503 conditions per place. [2024-06-21 21:16:40,219 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 314 selfloop transitions, 16 changer transitions 0/377 dead transitions. [2024-06-21 21:16:40,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 377 transitions, 5399 flow [2024-06-21 21:16:40,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:16:40,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:16:40,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 21:16:40,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869281045751634 [2024-06-21 21:16:40,221 INFO L175 Difference]: Start difference. First operand has 185 places, 350 transitions, 4587 flow. Second operand 6 states and 149 transitions. [2024-06-21 21:16:40,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 377 transitions, 5399 flow [2024-06-21 21:16:42,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 377 transitions, 5244 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 21:16:42,092 INFO L231 Difference]: Finished difference. Result has 186 places, 354 transitions, 4552 flow [2024-06-21 21:16:42,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4432, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4552, PETRI_PLACES=186, PETRI_TRANSITIONS=354} [2024-06-21 21:16:42,092 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 132 predicate places. [2024-06-21 21:16:42,092 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 354 transitions, 4552 flow [2024-06-21 21:16:42,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:42,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:42,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:42,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:16:42,093 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:42,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:42,094 INFO L85 PathProgramCache]: Analyzing trace with hash 605456582, now seen corresponding path program 5 times [2024-06-21 21:16:42,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:42,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514454552] [2024-06-21 21:16:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:42,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:43,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:43,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514454552] [2024-06-21 21:16:43,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514454552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:43,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:43,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:43,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769045628] [2024-06-21 21:16:43,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:43,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:43,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:43,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:43,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:43,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:16:43,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 354 transitions, 4552 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:43,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:43,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:16:43,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:46,403 INFO L124 PetriNetUnfolderBase]: 12105/17266 cut-off events. [2024-06-21 21:16:46,403 INFO L125 PetriNetUnfolderBase]: For 928594/928611 co-relation queries the response was YES. [2024-06-21 21:16:46,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133467 conditions, 17266 events. 12105/17266 cut-off events. For 928594/928611 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 101303 event pairs, 3571 based on Foata normal form. 70/17303 useless extension candidates. Maximal degree in co-relation 133386. Up to 15118 conditions per place. [2024-06-21 21:16:46,578 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 235 selfloop transitions, 149 changer transitions 0/391 dead transitions. [2024-06-21 21:16:46,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 391 transitions, 5497 flow [2024-06-21 21:16:46,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:16:46,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:16:46,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 21:16:46,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-21 21:16:46,581 INFO L175 Difference]: Start difference. First operand has 186 places, 354 transitions, 4552 flow. Second operand 8 states and 200 transitions. [2024-06-21 21:16:46,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 391 transitions, 5497 flow [2024-06-21 21:16:48,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 391 transitions, 5363 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-21 21:16:48,493 INFO L231 Difference]: Finished difference. Result has 190 places, 356 transitions, 4767 flow [2024-06-21 21:16:48,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4767, PETRI_PLACES=190, PETRI_TRANSITIONS=356} [2024-06-21 21:16:48,494 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 136 predicate places. [2024-06-21 21:16:48,494 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 356 transitions, 4767 flow [2024-06-21 21:16:48,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:48,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:48,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:48,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:16:48,495 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:16:48,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:48,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1783073962, now seen corresponding path program 4 times [2024-06-21 21:16:48,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:48,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49408940] [2024-06-21 21:16:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:48,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:49,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:49,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49408940] [2024-06-21 21:16:49,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49408940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:49,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:49,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:16:49,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370404826] [2024-06-21 21:16:49,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:49,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:16:49,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:49,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:16:49,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:16:49,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:16:49,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 356 transitions, 4767 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:49,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:49,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:16:49,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand