./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:15:33,698 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:15:33,775 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:15:33,781 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:15:33,781 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:15:33,926 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:15:33,927 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:15:33,927 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:15:33,928 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:15:33,928 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:15:33,928 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:15:33,929 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:15:33,929 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:15:33,930 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:15:33,930 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:15:33,930 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:15:33,931 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:15:33,931 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:15:33,931 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:15:33,932 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:15:33,932 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:15:33,932 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:15:33,933 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:15:33,933 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:15:33,933 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:15:33,934 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:15:33,934 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:15:33,934 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:15:33,935 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:15:33,935 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:15:33,935 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:15:33,936 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:15:33,936 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:15:33,936 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:15:33,937 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:15:33,937 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:15:33,937 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:15:33,937 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:15:33,938 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:15:33,938 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:15:33,938 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:15:33,938 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:15:33,939 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:15:33,939 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:15:34,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:15:34,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:15:34,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:15:34,198 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:15:34,199 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:15:34,200 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i [2024-06-14 12:15:35,391 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:15:35,642 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:15:35,643 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i [2024-06-14 12:15:35,664 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba0d39c66/76c8ea86e1d94aa89eac853987fecf30/FLAGb6b7c1318 [2024-06-14 12:15:35,676 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba0d39c66/76c8ea86e1d94aa89eac853987fecf30 [2024-06-14 12:15:35,678 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:15:35,684 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:15:35,684 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-14 12:15:35,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:15:35,903 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:15:35,904 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:15:35,904 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:15:35,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:15:35,910 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:15:35" (1/2) ... [2024-06-14 12:15:35,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1095b3ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:15:35, skipping insertion in model container [2024-06-14 12:15:35,911 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:15:35" (1/2) ... [2024-06-14 12:15:35,913 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@32770df8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:15:35, skipping insertion in model container [2024-06-14 12:15:35,914 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:15:35" (2/2) ... [2024-06-14 12:15:35,914 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1095b3ee and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:15:35, skipping insertion in model container [2024-06-14 12:15:35,914 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:15:35" (2/2) ... [2024-06-14 12:15:35,914 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:15:36,034 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:15:36,035 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-14 12:15:36,036 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-14 12:15:36,036 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-14 12:15:36,036 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-14 12:15:36,036 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:15:36,037 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-14 12:15:36,085 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:15:36,412 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:15:36,423 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:15:36,589 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:15:36,647 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:15:36,648 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:15:36 WrapperNode [2024-06-14 12:15:36,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:15:36,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:15:36,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:15:36,649 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:15:36,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:15:36" (1/1) ... [2024-06-14 12:15:36,673 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:15:36" (1/1) ... [2024-06-14 12:15:36,736 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 157 [2024-06-14 12:15:36,736 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:15:36,737 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:15:36,737 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:15:36,737 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:15:36,755 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:15:36" (1/1) ... [2024-06-14 12:15:36,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:15:36" (1/1) ... [2024-06-14 12:15:36,759 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:15:36" (1/1) ... [2024-06-14 12:15:36,818 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:15:36,826 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:15:36" (1/1) ... [2024-06-14 12:15:36,826 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:15:36" (1/1) ... [2024-06-14 12:15:36,848 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:15:36" (1/1) ... [2024-06-14 12:15:36,850 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:15:36" (1/1) ... [2024-06-14 12:15:36,852 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:15:36" (1/1) ... [2024-06-14 12:15:36,854 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:15:36" (1/1) ... [2024-06-14 12:15:36,858 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:15:36,858 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:15:36,859 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:15:36,859 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:15:36,859 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:15:36" (1/1) ... [2024-06-14 12:15:36,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:15:36,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:15:36,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:15:36,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:15:36,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:15:36,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:15:36,923 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:15:36,923 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:15:36,924 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:15:36,924 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:15:36,924 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:15:36,924 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:15:36,924 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:15:36,925 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:15:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:15:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:15:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:15:36,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:15:36,926 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:15:37,053 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:15:37,055 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:15:37,564 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:15:37,565 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:15:37,759 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:15:37,760 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:15:37,761 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:15:37 BoogieIcfgContainer [2024-06-14 12:15:37,761 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:15:37,765 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:15:37,765 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:15:37,768 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:15:37,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:15:35" (1/4) ... [2024-06-14 12:15:37,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c6f0b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:15:37, skipping insertion in model container [2024-06-14 12:15:37,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:15:35" (2/4) ... [2024-06-14 12:15:37,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c6f0b1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:15:37, skipping insertion in model container [2024-06-14 12:15:37,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:15:36" (3/4) ... [2024-06-14 12:15:37,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c6f0b1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:15:37, skipping insertion in model container [2024-06-14 12:15:37,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:15:37" (4/4) ... [2024-06-14 12:15:37,771 INFO L112 eAbstractionObserver]: Analyzing ICFG mix029_power.opt_pso.opt_rmo.opt.i [2024-06-14 12:15:37,788 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:15:37,788 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:15:37,789 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:15:37,852 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:15:37,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 12:15:37,934 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-14 12:15:37,934 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:15:37,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:15:37,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 12:15:37,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-14 12:15:37,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:15:37,963 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;@3e35cb5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:15:37,963 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:15:37,969 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:15:37,969 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:15:37,969 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:15:37,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:37,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:15:37,970 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)] === [2024-06-14 12:15:37,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:37,975 INFO L85 PathProgramCache]: Analyzing trace with hash -840864292, now seen corresponding path program 1 times [2024-06-14 12:15:37,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:37,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521574685] [2024-06-14 12:15:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:37,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:39,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:39,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521574685] [2024-06-14 12:15:39,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521574685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:39,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:39,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:15:39,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023405745] [2024-06-14 12:15:39,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:39,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:15:39,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:39,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:15:39,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:15:39,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:15:39,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:39,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:39,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:15:39,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:41,296 INFO L124 PetriNetUnfolderBase]: 7775/11128 cut-off events. [2024-06-14 12:15:41,297 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-06-14 12:15:41,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22102 conditions, 11128 events. 7775/11128 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 63923 event pairs, 5733 based on Foata normal form. 1/10784 useless extension candidates. Maximal degree in co-relation 22086. Up to 10609 conditions per place. [2024-06-14 12:15:41,386 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 44 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-14 12:15:41,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 233 flow [2024-06-14 12:15:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:15:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:15:41,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-14 12:15:41,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-06-14 12:15:41,402 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 95 transitions. [2024-06-14 12:15:41,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 233 flow [2024-06-14 12:15:41,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:41,412 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-14 12:15:41,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-14 12:15:41,418 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-14 12:15:41,419 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-14 12:15:41,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:41,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:41,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:41,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:15:41,421 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)] === [2024-06-14 12:15:41,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:41,421 INFO L85 PathProgramCache]: Analyzing trace with hash -616711301, now seen corresponding path program 1 times [2024-06-14 12:15:41,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:41,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258593673] [2024-06-14 12:15:41,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:41,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:42,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:42,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258593673] [2024-06-14 12:15:42,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258593673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:42,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:42,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:15:42,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446066232] [2024-06-14 12:15:42,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:42,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:15:42,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:42,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:15:42,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:15:42,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:15:42,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:42,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:42,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:15:42,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:44,390 INFO L124 PetriNetUnfolderBase]: 9097/12638 cut-off events. [2024-06-14 12:15:44,391 INFO L125 PetriNetUnfolderBase]: For 2438/2438 co-relation queries the response was YES. [2024-06-14 12:15:44,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28723 conditions, 12638 events. 9097/12638 cut-off events. For 2438/2438 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 69925 event pairs, 5837 based on Foata normal form. 4/12638 useless extension candidates. Maximal degree in co-relation 28708. Up to 12338 conditions per place. [2024-06-14 12:15:44,475 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 55 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-14 12:15:44,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 327 flow [2024-06-14 12:15:44,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:15:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:15:44,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-14 12:15:44,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-06-14 12:15:44,480 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 120 transitions. [2024-06-14 12:15:44,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 327 flow [2024-06-14 12:15:44,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:15:44,483 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-14 12:15:44,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-14 12:15:44,484 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-14 12:15:44,485 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-14 12:15:44,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:44,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:44,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:44,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:15:44,487 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)] === [2024-06-14 12:15:44,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1424458054, now seen corresponding path program 1 times [2024-06-14 12:15:44,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:44,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046632899] [2024-06-14 12:15:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:44,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:45,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:45,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046632899] [2024-06-14 12:15:45,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046632899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:45,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:45,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:15:45,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005050658] [2024-06-14 12:15:45,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:45,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:15:45,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:45,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:15:45,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:15:45,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:15:45,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:45,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:45,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:15:45,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:47,912 INFO L124 PetriNetUnfolderBase]: 11555/15929 cut-off events. [2024-06-14 12:15:47,913 INFO L125 PetriNetUnfolderBase]: For 8202/8202 co-relation queries the response was YES. [2024-06-14 12:15:47,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39940 conditions, 15929 events. 11555/15929 cut-off events. For 8202/8202 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86148 event pairs, 5920 based on Foata normal form. 8/15933 useless extension candidates. Maximal degree in co-relation 39923. Up to 15541 conditions per place. [2024-06-14 12:15:48,024 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 73 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-14 12:15:48,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 492 flow [2024-06-14 12:15:48,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-14 12:15:48,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-14 12:15:48,027 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 165 transitions. [2024-06-14 12:15:48,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 492 flow [2024-06-14 12:15:48,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 464 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 12:15:48,031 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-14 12:15:48,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-14 12:15:48,032 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-14 12:15:48,032 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-14 12:15:48,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:48,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:48,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:48,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:15:48,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:15:48,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:48,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1224150158, now seen corresponding path program 1 times [2024-06-14 12:15:48,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:48,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279182480] [2024-06-14 12:15:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:48,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:49,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:49,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279182480] [2024-06-14 12:15:49,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279182480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:49,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:49,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:15:49,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135146410] [2024-06-14 12:15:49,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:49,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:15:49,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:49,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:15:49,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:15:49,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:15:49,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:49,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:49,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:15:49,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:51,309 INFO L124 PetriNetUnfolderBase]: 9854/13977 cut-off events. [2024-06-14 12:15:51,309 INFO L125 PetriNetUnfolderBase]: For 13385/13385 co-relation queries the response was YES. [2024-06-14 12:15:51,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38254 conditions, 13977 events. 9854/13977 cut-off events. For 13385/13385 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 78856 event pairs, 5511 based on Foata normal form. 3/13774 useless extension candidates. Maximal degree in co-relation 38235. Up to 13366 conditions per place. [2024-06-14 12:15:51,427 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 61 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-14 12:15:51,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 451 flow [2024-06-14 12:15:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:15:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:15:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-14 12:15:51,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-06-14 12:15:51,431 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 123 transitions. [2024-06-14 12:15:51,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 451 flow [2024-06-14 12:15:51,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 413 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 12:15:51,442 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-14 12:15:51,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-14 12:15:51,444 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-14 12:15:51,444 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-14 12:15:51,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:51,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:51,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:51,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:15:51,446 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)] === [2024-06-14 12:15:51,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:51,446 INFO L85 PathProgramCache]: Analyzing trace with hash -730179592, now seen corresponding path program 1 times [2024-06-14 12:15:51,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:51,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173664657] [2024-06-14 12:15:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:51,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:52,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:52,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173664657] [2024-06-14 12:15:52,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173664657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:52,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:52,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:15:52,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330549777] [2024-06-14 12:15:52,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:52,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:15:52,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:15:52,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:15:52,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:15:52,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:52,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:52,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:15:52,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:54,649 INFO L124 PetriNetUnfolderBase]: 9836/13953 cut-off events. [2024-06-14 12:15:54,649 INFO L125 PetriNetUnfolderBase]: For 20720/20720 co-relation queries the response was YES. [2024-06-14 12:15:54,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41481 conditions, 13953 events. 9836/13953 cut-off events. For 20720/20720 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 78678 event pairs, 5261 based on Foata normal form. 6/13753 useless extension candidates. Maximal degree in co-relation 41460. Up to 13312 conditions per place. [2024-06-14 12:15:54,744 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 69 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-14 12:15:54,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 90 transitions, 524 flow [2024-06-14 12:15:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 12:15:54,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 12:15:54,751 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 147 transitions. [2024-06-14 12:15:54,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 90 transitions, 524 flow [2024-06-14 12:15:54,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 90 transitions, 495 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:15:54,759 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 312 flow [2024-06-14 12:15:54,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-14 12:15:54,766 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-14 12:15:54,766 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 312 flow [2024-06-14 12:15:54,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:54,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:54,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:54,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:15:54,767 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)] === [2024-06-14 12:15:54,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:54,767 INFO L85 PathProgramCache]: Analyzing trace with hash -394123943, now seen corresponding path program 1 times [2024-06-14 12:15:54,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:54,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985086946] [2024-06-14 12:15:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:54,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:55,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:55,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985086946] [2024-06-14 12:15:55,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985086946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:55,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:55,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:15:55,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536941515] [2024-06-14 12:15:55,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:55,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:15:55,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:55,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:15:55,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:15:56,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:15:56,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 312 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:56,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:56,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:15:56,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:57,704 INFO L124 PetriNetUnfolderBase]: 11550/15933 cut-off events. [2024-06-14 12:15:57,704 INFO L125 PetriNetUnfolderBase]: For 35783/35795 co-relation queries the response was YES. [2024-06-14 12:15:57,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51533 conditions, 15933 events. 11550/15933 cut-off events. For 35783/35795 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86253 event pairs, 6273 based on Foata normal form. 11/15938 useless extension candidates. Maximal degree in co-relation 51511. Up to 15550 conditions per place. [2024-06-14 12:15:57,798 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 76 selfloop transitions, 21 changer transitions 0/103 dead transitions. [2024-06-14 12:15:57,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 676 flow [2024-06-14 12:15:57,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:57,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 12:15:57,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46855345911949686 [2024-06-14 12:15:57,800 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 312 flow. Second operand 6 states and 149 transitions. [2024-06-14 12:15:57,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 676 flow [2024-06-14 12:15:57,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 103 transitions, 633 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:57,807 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 394 flow [2024-06-14 12:15:57,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=394, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2024-06-14 12:15:57,808 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-14 12:15:57,809 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 394 flow [2024-06-14 12:15:57,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:57,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:57,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:57,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:15:57,809 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)] === [2024-06-14 12:15:57,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:57,810 INFO L85 PathProgramCache]: Analyzing trace with hash -387660443, now seen corresponding path program 2 times [2024-06-14 12:15:57,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:57,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599876867] [2024-06-14 12:15:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:57,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:58,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:58,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599876867] [2024-06-14 12:15:58,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599876867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:58,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:58,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:15:58,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815927136] [2024-06-14 12:15:58,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:58,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:15:58,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:15:58,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:15:59,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:15:59,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 394 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:59,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:59,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:15:59,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:00,708 INFO L124 PetriNetUnfolderBase]: 11541/15922 cut-off events. [2024-06-14 12:16:00,708 INFO L125 PetriNetUnfolderBase]: For 49177/49186 co-relation queries the response was YES. [2024-06-14 12:16:00,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55269 conditions, 15922 events. 11541/15922 cut-off events. For 49177/49186 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86189 event pairs, 6276 based on Foata normal form. 9/15924 useless extension candidates. Maximal degree in co-relation 55246. Up to 15541 conditions per place. [2024-06-14 12:16:00,823 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 70 selfloop transitions, 21 changer transitions 0/97 dead transitions. [2024-06-14 12:16:00,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 97 transitions, 638 flow [2024-06-14 12:16:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:16:00,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:16:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 12:16:00,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2024-06-14 12:16:00,826 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 394 flow. Second operand 6 states and 143 transitions. [2024-06-14 12:16:00,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 97 transitions, 638 flow [2024-06-14 12:16:00,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 97 transitions, 584 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-14 12:16:00,855 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 393 flow [2024-06-14 12:16:00,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-06-14 12:16:00,857 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-06-14 12:16:00,857 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 393 flow [2024-06-14 12:16:00,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:00,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:00,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:00,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:16:00,858 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)] === [2024-06-14 12:16:00,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:00,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1081172829, now seen corresponding path program 1 times [2024-06-14 12:16:00,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:00,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738097711] [2024-06-14 12:16:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:00,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:02,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:02,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738097711] [2024-06-14 12:16:02,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738097711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:02,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:02,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:02,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399591837] [2024-06-14 12:16:02,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:02,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:02,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:02,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:02,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:02,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:16:02,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:02,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:02,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:16:02,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:03,843 INFO L124 PetriNetUnfolderBase]: 11632/16060 cut-off events. [2024-06-14 12:16:03,843 INFO L125 PetriNetUnfolderBase]: For 55882/55886 co-relation queries the response was YES. [2024-06-14 12:16:03,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56300 conditions, 16060 events. 11632/16060 cut-off events. For 55882/55886 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 87126 event pairs, 6266 based on Foata normal form. 7/16063 useless extension candidates. Maximal degree in co-relation 56275. Up to 15643 conditions per place. [2024-06-14 12:16:03,993 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 94 selfloop transitions, 32 changer transitions 0/132 dead transitions. [2024-06-14 12:16:03,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 132 transitions, 870 flow [2024-06-14 12:16:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 12:16:03,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 12:16:03,995 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 393 flow. Second operand 8 states and 192 transitions. [2024-06-14 12:16:03,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 132 transitions, 870 flow [2024-06-14 12:16:04,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 132 transitions, 796 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:04,016 INFO L231 Difference]: Finished difference. Result has 77 places, 92 transitions, 549 flow [2024-06-14 12:16:04,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=549, PETRI_PLACES=77, PETRI_TRANSITIONS=92} [2024-06-14 12:16:04,017 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-14 12:16:04,017 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 92 transitions, 549 flow [2024-06-14 12:16:04,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:04,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:04,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:04,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:16:04,018 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:16:04,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:04,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1800355107, now seen corresponding path program 2 times [2024-06-14 12:16:04,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:04,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210851338] [2024-06-14 12:16:04,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:04,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:05,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:05,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210851338] [2024-06-14 12:16:05,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210851338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:05,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:05,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:05,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655880919] [2024-06-14 12:16:05,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:05,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:05,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:05,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:05,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:05,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:16:05,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 92 transitions, 549 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:05,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:05,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:16:05,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:07,031 INFO L124 PetriNetUnfolderBase]: 11654/16114 cut-off events. [2024-06-14 12:16:07,031 INFO L125 PetriNetUnfolderBase]: For 72332/72340 co-relation queries the response was YES. [2024-06-14 12:16:07,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60623 conditions, 16114 events. 11654/16114 cut-off events. For 72332/72340 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87308 event pairs, 6120 based on Foata normal form. 11/16121 useless extension candidates. Maximal degree in co-relation 60596. Up to 15650 conditions per place. [2024-06-14 12:16:07,144 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 94 selfloop transitions, 34 changer transitions 0/134 dead transitions. [2024-06-14 12:16:07,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 134 transitions, 979 flow [2024-06-14 12:16:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:07,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 12:16:07,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555256064690027 [2024-06-14 12:16:07,146 INFO L175 Difference]: Start difference. First operand has 77 places, 92 transitions, 549 flow. Second operand 7 states and 169 transitions. [2024-06-14 12:16:07,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 134 transitions, 979 flow [2024-06-14 12:16:07,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 134 transitions, 917 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 12:16:07,174 INFO L231 Difference]: Finished difference. Result has 81 places, 96 transitions, 626 flow [2024-06-14 12:16:07,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=626, PETRI_PLACES=81, PETRI_TRANSITIONS=96} [2024-06-14 12:16:07,174 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-14 12:16:07,175 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 96 transitions, 626 flow [2024-06-14 12:16:07,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:07,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:07,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:07,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:16:07,175 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)] === [2024-06-14 12:16:07,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:07,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1800235137, now seen corresponding path program 3 times [2024-06-14 12:16:07,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:07,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916152291] [2024-06-14 12:16:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:07,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:08,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:08,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916152291] [2024-06-14 12:16:08,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916152291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:08,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:08,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:08,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142231292] [2024-06-14 12:16:08,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:08,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:08,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:08,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:08,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:08,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:16:08,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 96 transitions, 626 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:08,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:08,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:16:08,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:10,174 INFO L124 PetriNetUnfolderBase]: 11676/16151 cut-off events. [2024-06-14 12:16:10,174 INFO L125 PetriNetUnfolderBase]: For 92293/92307 co-relation queries the response was YES. [2024-06-14 12:16:10,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64687 conditions, 16151 events. 11676/16151 cut-off events. For 92293/92307 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87746 event pairs, 6133 based on Foata normal form. 11/16156 useless extension candidates. Maximal degree in co-relation 64659. Up to 15594 conditions per place. [2024-06-14 12:16:10,298 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 84 selfloop transitions, 50 changer transitions 0/140 dead transitions. [2024-06-14 12:16:10,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 140 transitions, 1166 flow [2024-06-14 12:16:10,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:10,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 12:16:10,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46630727762803237 [2024-06-14 12:16:10,299 INFO L175 Difference]: Start difference. First operand has 81 places, 96 transitions, 626 flow. Second operand 7 states and 173 transitions. [2024-06-14 12:16:10,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 140 transitions, 1166 flow [2024-06-14 12:16:10,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 140 transitions, 1043 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 12:16:10,338 INFO L231 Difference]: Finished difference. Result has 83 places, 104 transitions, 736 flow [2024-06-14 12:16:10,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=736, PETRI_PLACES=83, PETRI_TRANSITIONS=104} [2024-06-14 12:16:10,339 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-14 12:16:10,339 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 104 transitions, 736 flow [2024-06-14 12:16:10,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:10,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:10,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:10,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:16:10,340 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)] === [2024-06-14 12:16:10,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:10,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1800234951, now seen corresponding path program 1 times [2024-06-14 12:16:10,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:10,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442700135] [2024-06-14 12:16:10,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:10,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:11,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:11,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442700135] [2024-06-14 12:16:11,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442700135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:11,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:11,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:11,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355797030] [2024-06-14 12:16:11,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:11,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:11,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:11,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:11,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:11,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:16:11,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 104 transitions, 736 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:11,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:11,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:16:11,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:13,577 INFO L124 PetriNetUnfolderBase]: 11720/16216 cut-off events. [2024-06-14 12:16:13,577 INFO L125 PetriNetUnfolderBase]: For 94104/94121 co-relation queries the response was YES. [2024-06-14 12:16:13,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64975 conditions, 16216 events. 11720/16216 cut-off events. For 94104/94121 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87938 event pairs, 5724 based on Foata normal form. 17/16225 useless extension candidates. Maximal degree in co-relation 64946. Up to 15656 conditions per place. [2024-06-14 12:16:13,654 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 113 selfloop transitions, 35 changer transitions 0/154 dead transitions. [2024-06-14 12:16:13,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 154 transitions, 1308 flow [2024-06-14 12:16:13,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:13,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 12:16:13,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-14 12:16:13,656 INFO L175 Difference]: Start difference. First operand has 83 places, 104 transitions, 736 flow. Second operand 7 states and 176 transitions. [2024-06-14 12:16:13,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 154 transitions, 1308 flow [2024-06-14 12:16:13,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 154 transitions, 1243 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:16:13,688 INFO L231 Difference]: Finished difference. Result has 87 places, 112 transitions, 848 flow [2024-06-14 12:16:13,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=848, PETRI_PLACES=87, PETRI_TRANSITIONS=112} [2024-06-14 12:16:13,689 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-14 12:16:13,689 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 112 transitions, 848 flow [2024-06-14 12:16:13,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:13,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:13,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:13,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:16:13,690 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:16:13,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:13,690 INFO L85 PathProgramCache]: Analyzing trace with hash 867667189, now seen corresponding path program 2 times [2024-06-14 12:16:13,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:13,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947304347] [2024-06-14 12:16:13,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:13,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:14,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:14,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947304347] [2024-06-14 12:16:14,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947304347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:14,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:14,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:14,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169500094] [2024-06-14 12:16:14,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:14,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:14,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:14,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:14,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:14,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:16:14,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 112 transitions, 848 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:14,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:14,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:16:14,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:16,860 INFO L124 PetriNetUnfolderBase]: 11764/16275 cut-off events. [2024-06-14 12:16:16,860 INFO L125 PetriNetUnfolderBase]: For 115468/115489 co-relation queries the response was YES. [2024-06-14 12:16:16,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69214 conditions, 16275 events. 11764/16275 cut-off events. For 115468/115489 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88322 event pairs, 5713 based on Foata normal form. 20/16285 useless extension candidates. Maximal degree in co-relation 69183. Up to 15694 conditions per place. [2024-06-14 12:16:16,957 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 109 selfloop transitions, 40 changer transitions 0/155 dead transitions. [2024-06-14 12:16:16,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 155 transitions, 1384 flow [2024-06-14 12:16:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 12:16:16,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-14 12:16:16,959 INFO L175 Difference]: Start difference. First operand has 87 places, 112 transitions, 848 flow. Second operand 7 states and 171 transitions. [2024-06-14 12:16:16,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 155 transitions, 1384 flow [2024-06-14 12:16:17,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 155 transitions, 1329 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 12:16:17,004 INFO L231 Difference]: Finished difference. Result has 91 places, 116 transitions, 936 flow [2024-06-14 12:16:17,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=936, PETRI_PLACES=91, PETRI_TRANSITIONS=116} [2024-06-14 12:16:17,005 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-14 12:16:17,005 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 116 transitions, 936 flow [2024-06-14 12:16:17,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:17,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:17,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:17,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:16:17,006 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)] === [2024-06-14 12:16:17,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:17,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1623103617, now seen corresponding path program 4 times [2024-06-14 12:16:17,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:17,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923774866] [2024-06-14 12:16:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:17,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:18,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:18,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923774866] [2024-06-14 12:16:18,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923774866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:18,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:18,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:18,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625877767] [2024-06-14 12:16:18,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:18,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:18,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:18,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:18,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:18,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:16:18,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 116 transitions, 936 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:18,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:18,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:16:18,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:20,109 INFO L124 PetriNetUnfolderBase]: 11755/16258 cut-off events. [2024-06-14 12:16:20,109 INFO L125 PetriNetUnfolderBase]: For 128592/128597 co-relation queries the response was YES. [2024-06-14 12:16:20,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70551 conditions, 16258 events. 11755/16258 cut-off events. For 128592/128597 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88160 event pairs, 5984 based on Foata normal form. 3/16243 useless extension candidates. Maximal degree in co-relation 70518. Up to 15705 conditions per place. [2024-06-14 12:16:20,209 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 91 selfloop transitions, 50 changer transitions 0/147 dead transitions. [2024-06-14 12:16:20,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 147 transitions, 1316 flow [2024-06-14 12:16:20,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 12:16:20,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501347708894879 [2024-06-14 12:16:20,211 INFO L175 Difference]: Start difference. First operand has 91 places, 116 transitions, 936 flow. Second operand 7 states and 167 transitions. [2024-06-14 12:16:20,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 147 transitions, 1316 flow [2024-06-14 12:16:20,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 147 transitions, 1184 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 12:16:20,277 INFO L231 Difference]: Finished difference. Result has 94 places, 116 transitions, 915 flow [2024-06-14 12:16:20,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=915, PETRI_PLACES=94, PETRI_TRANSITIONS=116} [2024-06-14 12:16:20,278 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-14 12:16:20,278 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 116 transitions, 915 flow [2024-06-14 12:16:20,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:20,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:20,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:20,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:16:20,279 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)] === [2024-06-14 12:16:20,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:20,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1623103431, now seen corresponding path program 3 times [2024-06-14 12:16:20,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:20,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202897434] [2024-06-14 12:16:20,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:20,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:21,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:21,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202897434] [2024-06-14 12:16:21,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202897434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:21,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:21,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:16:21,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133113838] [2024-06-14 12:16:21,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:21,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:16:21,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:21,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:16:21,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:16:21,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:16:21,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 116 transitions, 915 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:21,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:21,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:16:21,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:23,332 INFO L124 PetriNetUnfolderBase]: 11737/16239 cut-off events. [2024-06-14 12:16:23,332 INFO L125 PetriNetUnfolderBase]: For 141730/141751 co-relation queries the response was YES. [2024-06-14 12:16:23,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71428 conditions, 16239 events. 11737/16239 cut-off events. For 141730/141751 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88157 event pairs, 5710 based on Foata normal form. 20/16249 useless extension candidates. Maximal degree in co-relation 71394. Up to 15667 conditions per place. [2024-06-14 12:16:23,435 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 108 selfloop transitions, 39 changer transitions 0/153 dead transitions. [2024-06-14 12:16:23,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 153 transitions, 1331 flow [2024-06-14 12:16:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 12:16:23,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582210242587601 [2024-06-14 12:16:23,436 INFO L175 Difference]: Start difference. First operand has 94 places, 116 transitions, 915 flow. Second operand 7 states and 170 transitions. [2024-06-14 12:16:23,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 153 transitions, 1331 flow [2024-06-14 12:16:23,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 153 transitions, 1171 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:23,514 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 844 flow [2024-06-14 12:16:23,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=844, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2024-06-14 12:16:23,515 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-14 12:16:23,515 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 844 flow [2024-06-14 12:16:23,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:23,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:23,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:23,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:16:23,516 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)] === [2024-06-14 12:16:23,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:23,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1622857353, now seen corresponding path program 1 times [2024-06-14 12:16:23,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:23,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325852604] [2024-06-14 12:16:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:23,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:24,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:24,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325852604] [2024-06-14 12:16:24,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325852604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:24,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:24,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:24,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821847070] [2024-06-14 12:16:24,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:24,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:24,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:24,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:24,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:25,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:16:25,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 116 transitions, 844 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:25,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:25,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:16:25,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:26,669 INFO L124 PetriNetUnfolderBase]: 10030/14026 cut-off events. [2024-06-14 12:16:26,669 INFO L125 PetriNetUnfolderBase]: For 133928/133930 co-relation queries the response was YES. [2024-06-14 12:16:26,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63146 conditions, 14026 events. 10030/14026 cut-off events. For 133928/133930 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 77313 event pairs, 4745 based on Foata normal form. 6/13882 useless extension candidates. Maximal degree in co-relation 63111. Up to 13549 conditions per place. [2024-06-14 12:16:26,776 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 128 selfloop transitions, 17 changer transitions 0/152 dead transitions. [2024-06-14 12:16:26,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 152 transitions, 1284 flow [2024-06-14 12:16:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:26,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 12:16:26,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582210242587601 [2024-06-14 12:16:26,778 INFO L175 Difference]: Start difference. First operand has 95 places, 116 transitions, 844 flow. Second operand 7 states and 170 transitions. [2024-06-14 12:16:26,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 152 transitions, 1284 flow [2024-06-14 12:16:26,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 152 transitions, 1174 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:26,868 INFO L231 Difference]: Finished difference. Result has 95 places, 119 transitions, 832 flow [2024-06-14 12:16:26,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=832, PETRI_PLACES=95, PETRI_TRANSITIONS=119} [2024-06-14 12:16:26,869 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-14 12:16:26,869 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 119 transitions, 832 flow [2024-06-14 12:16:26,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:26,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:26,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:26,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:16:26,870 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)] === [2024-06-14 12:16:26,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:26,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1375221334, now seen corresponding path program 1 times [2024-06-14 12:16:26,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:26,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949757977] [2024-06-14 12:16:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:26,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:27,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:27,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949757977] [2024-06-14 12:16:27,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949757977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:27,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:27,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:16:27,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499403783] [2024-06-14 12:16:27,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:27,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:16:27,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:27,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:16:27,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:16:27,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:16:27,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 119 transitions, 832 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:27,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:27,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:16:27,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:29,383 INFO L124 PetriNetUnfolderBase]: 9418/13779 cut-off events. [2024-06-14 12:16:29,383 INFO L125 PetriNetUnfolderBase]: For 146475/146492 co-relation queries the response was YES. [2024-06-14 12:16:29,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63360 conditions, 13779 events. 9418/13779 cut-off events. For 146475/146492 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 81476 event pairs, 4946 based on Foata normal form. 17/13609 useless extension candidates. Maximal degree in co-relation 63324. Up to 12829 conditions per place. [2024-06-14 12:16:29,482 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 112 selfloop transitions, 10 changer transitions 0/137 dead transitions. [2024-06-14 12:16:29,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 137 transitions, 1162 flow [2024-06-14 12:16:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:16:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:16:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-14 12:16:29,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-06-14 12:16:29,483 INFO L175 Difference]: Start difference. First operand has 95 places, 119 transitions, 832 flow. Second operand 5 states and 123 transitions. [2024-06-14 12:16:29,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 137 transitions, 1162 flow [2024-06-14 12:16:29,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 137 transitions, 1090 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:16:29,555 INFO L231 Difference]: Finished difference. Result has 95 places, 123 transitions, 839 flow [2024-06-14 12:16:29,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=839, PETRI_PLACES=95, PETRI_TRANSITIONS=123} [2024-06-14 12:16:29,556 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-14 12:16:29,556 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 123 transitions, 839 flow [2024-06-14 12:16:29,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:29,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:29,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:29,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:16:29,557 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:16:29,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:29,557 INFO L85 PathProgramCache]: Analyzing trace with hash 23568415, now seen corresponding path program 1 times [2024-06-14 12:16:29,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:29,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593285077] [2024-06-14 12:16:29,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:29,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:30,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:30,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593285077] [2024-06-14 12:16:30,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593285077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:30,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:30,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:30,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634751609] [2024-06-14 12:16:30,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:30,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:30,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:30,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:16:30,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 123 transitions, 839 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:30,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:30,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:16:30,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:32,650 INFO L124 PetriNetUnfolderBase]: 11759/16296 cut-off events. [2024-06-14 12:16:32,651 INFO L125 PetriNetUnfolderBase]: For 201539/201547 co-relation queries the response was YES. [2024-06-14 12:16:32,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79093 conditions, 16296 events. 11759/16296 cut-off events. For 201539/201547 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 88613 event pairs, 5816 based on Foata normal form. 14/16304 useless extension candidates. Maximal degree in co-relation 79056. Up to 15756 conditions per place. [2024-06-14 12:16:32,770 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 129 selfloop transitions, 38 changer transitions 0/173 dead transitions. [2024-06-14 12:16:32,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 173 transitions, 1385 flow [2024-06-14 12:16:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:32,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 12:16:32,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 12:16:32,772 INFO L175 Difference]: Start difference. First operand has 95 places, 123 transitions, 839 flow. Second operand 8 states and 192 transitions. [2024-06-14 12:16:32,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 173 transitions, 1385 flow [2024-06-14 12:16:32,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 173 transitions, 1336 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 12:16:32,855 INFO L231 Difference]: Finished difference. Result has 100 places, 127 transitions, 946 flow [2024-06-14 12:16:32,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=946, PETRI_PLACES=100, PETRI_TRANSITIONS=127} [2024-06-14 12:16:32,855 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-06-14 12:16:32,856 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 127 transitions, 946 flow [2024-06-14 12:16:32,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:32,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:32,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:32,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:16:32,856 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:16:32,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:32,857 INFO L85 PathProgramCache]: Analyzing trace with hash 27293065, now seen corresponding path program 2 times [2024-06-14 12:16:32,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:32,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682115309] [2024-06-14 12:16:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:32,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:34,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:34,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682115309] [2024-06-14 12:16:34,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682115309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:34,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:34,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:34,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967720711] [2024-06-14 12:16:34,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:34,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:34,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:34,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:34,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:34,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:16:34,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 127 transitions, 946 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:34,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:34,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:16:34,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:36,226 INFO L124 PetriNetUnfolderBase]: 11865/16483 cut-off events. [2024-06-14 12:16:36,226 INFO L125 PetriNetUnfolderBase]: For 231874/231885 co-relation queries the response was YES. [2024-06-14 12:16:36,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84070 conditions, 16483 events. 11865/16483 cut-off events. For 231874/231885 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 89894 event pairs, 5384 based on Foata normal form. 10/16485 useless extension candidates. Maximal degree in co-relation 84032. Up to 15541 conditions per place. [2024-06-14 12:16:36,355 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 107 selfloop transitions, 76 changer transitions 0/189 dead transitions. [2024-06-14 12:16:36,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 189 transitions, 1850 flow [2024-06-14 12:16:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 12:16:36,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834905660377358 [2024-06-14 12:16:36,357 INFO L175 Difference]: Start difference. First operand has 100 places, 127 transitions, 946 flow. Second operand 8 states and 205 transitions. [2024-06-14 12:16:36,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 189 transitions, 1850 flow [2024-06-14 12:16:36,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 189 transitions, 1728 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:36,471 INFO L231 Difference]: Finished difference. Result has 102 places, 139 transitions, 1199 flow [2024-06-14 12:16:36,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1199, PETRI_PLACES=102, PETRI_TRANSITIONS=139} [2024-06-14 12:16:36,472 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-14 12:16:36,472 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 139 transitions, 1199 flow [2024-06-14 12:16:36,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:36,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:36,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:36,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:16:36,473 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:16:36,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:36,474 INFO L85 PathProgramCache]: Analyzing trace with hash 27287485, now seen corresponding path program 3 times [2024-06-14 12:16:36,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:36,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721550243] [2024-06-14 12:16:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:36,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:37,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:37,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721550243] [2024-06-14 12:16:37,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721550243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:37,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:37,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:37,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806416376] [2024-06-14 12:16:37,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:37,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:37,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:37,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:37,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:37,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:16:37,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 139 transitions, 1199 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:37,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:37,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:16:37,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:39,856 INFO L124 PetriNetUnfolderBase]: 11847/16459 cut-off events. [2024-06-14 12:16:39,856 INFO L125 PetriNetUnfolderBase]: For 265868/265879 co-relation queries the response was YES. [2024-06-14 12:16:39,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87672 conditions, 16459 events. 11847/16459 cut-off events. For 265868/265879 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 89915 event pairs, 5392 based on Foata normal form. 10/16461 useless extension candidates. Maximal degree in co-relation 87633. Up to 15526 conditions per place. [2024-06-14 12:16:39,978 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 107 selfloop transitions, 74 changer transitions 0/187 dead transitions. [2024-06-14 12:16:39,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 187 transitions, 1803 flow [2024-06-14 12:16:39,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:39,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 12:16:39,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-14 12:16:39,981 INFO L175 Difference]: Start difference. First operand has 102 places, 139 transitions, 1199 flow. Second operand 8 states and 204 transitions. [2024-06-14 12:16:39,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 187 transitions, 1803 flow [2024-06-14 12:16:40,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 187 transitions, 1664 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-14 12:16:40,170 INFO L231 Difference]: Finished difference. Result has 107 places, 139 transitions, 1219 flow [2024-06-14 12:16:40,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1219, PETRI_PLACES=107, PETRI_TRANSITIONS=139} [2024-06-14 12:16:40,171 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-14 12:16:40,171 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 139 transitions, 1219 flow [2024-06-14 12:16:40,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:40,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:40,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:40,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:16:40,172 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)] === [2024-06-14 12:16:40,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:40,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1702347361, now seen corresponding path program 4 times [2024-06-14 12:16:40,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:40,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239015996] [2024-06-14 12:16:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:40,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:41,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:41,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239015996] [2024-06-14 12:16:41,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239015996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:41,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:41,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:41,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111127435] [2024-06-14 12:16:41,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:41,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:41,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:41,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:41,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:41,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:16:41,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 139 transitions, 1219 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:41,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:41,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:16:41,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:43,454 INFO L124 PetriNetUnfolderBase]: 11953/16616 cut-off events. [2024-06-14 12:16:43,454 INFO L125 PetriNetUnfolderBase]: For 289897/289902 co-relation queries the response was YES. [2024-06-14 12:16:43,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90206 conditions, 16616 events. 11953/16616 cut-off events. For 289897/289902 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 90674 event pairs, 5385 based on Foata normal form. 6/16604 useless extension candidates. Maximal degree in co-relation 90165. Up to 15617 conditions per place. [2024-06-14 12:16:43,617 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 107 selfloop transitions, 82 changer transitions 0/195 dead transitions. [2024-06-14 12:16:43,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 195 transitions, 2117 flow [2024-06-14 12:16:43,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:43,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 12:16:43,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-14 12:16:43,619 INFO L175 Difference]: Start difference. First operand has 107 places, 139 transitions, 1219 flow. Second operand 8 states and 203 transitions. [2024-06-14 12:16:43,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 195 transitions, 2117 flow [2024-06-14 12:16:43,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 195 transitions, 1928 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:43,752 INFO L231 Difference]: Finished difference. Result has 108 places, 147 transitions, 1373 flow [2024-06-14 12:16:43,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1046, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1373, PETRI_PLACES=108, PETRI_TRANSITIONS=147} [2024-06-14 12:16:43,752 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-14 12:16:43,752 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 147 transitions, 1373 flow [2024-06-14 12:16:43,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:43,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:43,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:43,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:16:43,753 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:16:43,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:43,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1230754539, now seen corresponding path program 5 times [2024-06-14 12:16:43,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:43,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946123304] [2024-06-14 12:16:43,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:43,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:44,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:44,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946123304] [2024-06-14 12:16:44,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946123304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:44,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:44,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:44,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991438761] [2024-06-14 12:16:44,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:44,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:44,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:44,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:44,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:45,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:16:45,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 147 transitions, 1373 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:45,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:45,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:16:45,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:47,131 INFO L124 PetriNetUnfolderBase]: 11935/16592 cut-off events. [2024-06-14 12:16:47,131 INFO L125 PetriNetUnfolderBase]: For 310291/310296 co-relation queries the response was YES. [2024-06-14 12:16:47,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91119 conditions, 16592 events. 11935/16592 cut-off events. For 310291/310296 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 90563 event pairs, 5393 based on Foata normal form. 6/16580 useless extension candidates. Maximal degree in co-relation 91077. Up to 15602 conditions per place. [2024-06-14 12:16:47,287 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 99 selfloop transitions, 86 changer transitions 0/191 dead transitions. [2024-06-14 12:16:47,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 191 transitions, 1987 flow [2024-06-14 12:16:47,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 12:16:47,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46462264150943394 [2024-06-14 12:16:47,290 INFO L175 Difference]: Start difference. First operand has 108 places, 147 transitions, 1373 flow. Second operand 8 states and 197 transitions. [2024-06-14 12:16:47,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 191 transitions, 1987 flow [2024-06-14 12:16:47,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 191 transitions, 1696 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-14 12:16:47,473 INFO L231 Difference]: Finished difference. Result has 111 places, 147 transitions, 1265 flow [2024-06-14 12:16:47,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1265, PETRI_PLACES=111, PETRI_TRANSITIONS=147} [2024-06-14 12:16:47,474 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-14 12:16:47,474 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 147 transitions, 1265 flow [2024-06-14 12:16:47,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:47,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:47,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:47,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:16:47,475 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)] === [2024-06-14 12:16:47,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:47,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1453126809, now seen corresponding path program 6 times [2024-06-14 12:16:47,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:47,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967554484] [2024-06-14 12:16:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:47,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:48,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:48,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967554484] [2024-06-14 12:16:48,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967554484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:48,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:48,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:48,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062933311] [2024-06-14 12:16:48,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:48,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:48,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:48,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:48,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:48,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:16:48,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 147 transitions, 1265 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:48,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:48,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:16:48,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:50,805 INFO L124 PetriNetUnfolderBase]: 11917/16568 cut-off events. [2024-06-14 12:16:50,806 INFO L125 PetriNetUnfolderBase]: For 328762/328767 co-relation queries the response was YES. [2024-06-14 12:16:50,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91690 conditions, 16568 events. 11917/16568 cut-off events. For 328762/328767 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 90409 event pairs, 5382 based on Foata normal form. 6/16556 useless extension candidates. Maximal degree in co-relation 91647. Up to 15587 conditions per place. [2024-06-14 12:16:50,964 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 100 selfloop transitions, 83 changer transitions 0/189 dead transitions. [2024-06-14 12:16:50,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 189 transitions, 1759 flow [2024-06-14 12:16:50,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:50,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 12:16:50,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 12:16:50,966 INFO L175 Difference]: Start difference. First operand has 111 places, 147 transitions, 1265 flow. Second operand 8 states and 196 transitions. [2024-06-14 12:16:50,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 189 transitions, 1759 flow [2024-06-14 12:16:51,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 189 transitions, 1516 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:51,145 INFO L231 Difference]: Finished difference. Result has 112 places, 147 transitions, 1199 flow [2024-06-14 12:16:51,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1199, PETRI_PLACES=112, PETRI_TRANSITIONS=147} [2024-06-14 12:16:51,146 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-06-14 12:16:51,146 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 147 transitions, 1199 flow [2024-06-14 12:16:51,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:51,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:51,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:51,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:16:51,146 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:16:51,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:51,147 INFO L85 PathProgramCache]: Analyzing trace with hash -317810076, now seen corresponding path program 1 times [2024-06-14 12:16:51,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:51,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113736250] [2024-06-14 12:16:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:51,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:52,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:52,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113736250] [2024-06-14 12:16:52,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113736250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:52,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:52,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:16:52,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636461155] [2024-06-14 12:16:52,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:52,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:16:52,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:52,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:16:52,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:16:52,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:16:52,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 147 transitions, 1199 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:52,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:52,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:16:52,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:53,945 INFO L124 PetriNetUnfolderBase]: 11165/15782 cut-off events. [2024-06-14 12:16:53,945 INFO L125 PetriNetUnfolderBase]: For 344116/344157 co-relation queries the response was YES. [2024-06-14 12:16:54,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89420 conditions, 15782 events. 11165/15782 cut-off events. For 344116/344157 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 89089 event pairs, 5719 based on Foata normal form. 18/15748 useless extension candidates. Maximal degree in co-relation 89376. Up to 15139 conditions per place. [2024-06-14 12:16:54,087 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 145 selfloop transitions, 22 changer transitions 0/181 dead transitions. [2024-06-14 12:16:54,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 181 transitions, 1811 flow [2024-06-14 12:16:54,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:16:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:16:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 12:16:54,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559748427672956 [2024-06-14 12:16:54,088 INFO L175 Difference]: Start difference. First operand has 112 places, 147 transitions, 1199 flow. Second operand 6 states and 145 transitions. [2024-06-14 12:16:54,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 181 transitions, 1811 flow [2024-06-14 12:16:54,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 181 transitions, 1634 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:54,318 INFO L231 Difference]: Finished difference. Result has 113 places, 161 transitions, 1244 flow [2024-06-14 12:16:54,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1244, PETRI_PLACES=113, PETRI_TRANSITIONS=161} [2024-06-14 12:16:54,318 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-14 12:16:54,318 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 161 transitions, 1244 flow [2024-06-14 12:16:54,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:54,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:54,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:54,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:16:54,319 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:16:54,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:54,319 INFO L85 PathProgramCache]: Analyzing trace with hash 727760860, now seen corresponding path program 1 times [2024-06-14 12:16:54,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:54,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561507111] [2024-06-14 12:16:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:54,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:55,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:55,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561507111] [2024-06-14 12:16:55,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561507111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:55,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:55,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:55,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855672108] [2024-06-14 12:16:55,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:55,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:55,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:55,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:55,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:16:55,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 161 transitions, 1244 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:55,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:55,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:16:55,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:57,780 INFO L124 PetriNetUnfolderBase]: 12425/17317 cut-off events. [2024-06-14 12:16:57,780 INFO L125 PetriNetUnfolderBase]: For 407559/407687 co-relation queries the response was YES. [2024-06-14 12:16:57,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101585 conditions, 17317 events. 12425/17317 cut-off events. For 407559/407687 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 95283 event pairs, 4759 based on Foata normal form. 14/17281 useless extension candidates. Maximal degree in co-relation 101538. Up to 16452 conditions per place. [2024-06-14 12:16:57,944 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 172 selfloop transitions, 43 changer transitions 0/224 dead transitions. [2024-06-14 12:16:57,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 224 transitions, 2120 flow [2024-06-14 12:16:57,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 12:16:57,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549266247379455 [2024-06-14 12:16:57,945 INFO L175 Difference]: Start difference. First operand has 113 places, 161 transitions, 1244 flow. Second operand 9 states and 217 transitions. [2024-06-14 12:16:57,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 224 transitions, 2120 flow [2024-06-14 12:16:58,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 224 transitions, 2074 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-14 12:16:58,465 INFO L231 Difference]: Finished difference. Result has 121 places, 167 transitions, 1436 flow [2024-06-14 12:16:58,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1436, PETRI_PLACES=121, PETRI_TRANSITIONS=167} [2024-06-14 12:16:58,465 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-06-14 12:16:58,465 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 167 transitions, 1436 flow [2024-06-14 12:16:58,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:58,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:58,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:58,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:16:58,466 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:16:58,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:58,466 INFO L85 PathProgramCache]: Analyzing trace with hash 841440340, now seen corresponding path program 2 times [2024-06-14 12:16:58,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:58,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275252292] [2024-06-14 12:16:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:58,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:59,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:59,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275252292] [2024-06-14 12:16:59,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275252292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:59,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:59,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:59,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913319452] [2024-06-14 12:16:59,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:59,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:59,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:59,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:59,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:59,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:16:59,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 167 transitions, 1436 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:59,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:59,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:16:59,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:02,375 INFO L124 PetriNetUnfolderBase]: 12410/17296 cut-off events. [2024-06-14 12:17:02,375 INFO L125 PetriNetUnfolderBase]: For 447750/447878 co-relation queries the response was YES. [2024-06-14 12:17:02,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104505 conditions, 17296 events. 12410/17296 cut-off events. For 447750/447878 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 95107 event pairs, 5571 based on Foata normal form. 14/17260 useless extension candidates. Maximal degree in co-relation 104455. Up to 16538 conditions per place. [2024-06-14 12:17:02,505 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 167 selfloop transitions, 37 changer transitions 0/213 dead transitions. [2024-06-14 12:17:02,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 213 transitions, 1996 flow [2024-06-14 12:17:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 12:17:02,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45047169811320753 [2024-06-14 12:17:02,506 INFO L175 Difference]: Start difference. First operand has 121 places, 167 transitions, 1436 flow. Second operand 8 states and 191 transitions. [2024-06-14 12:17:02,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 213 transitions, 1996 flow [2024-06-14 12:17:02,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 213 transitions, 1835 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-14 12:17:02,765 INFO L231 Difference]: Finished difference. Result has 124 places, 167 transitions, 1360 flow [2024-06-14 12:17:02,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1360, PETRI_PLACES=124, PETRI_TRANSITIONS=167} [2024-06-14 12:17:02,765 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-06-14 12:17:02,765 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 167 transitions, 1360 flow [2024-06-14 12:17:02,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:02,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:02,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:02,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:17:02,766 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:17:02,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:02,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1301722294, now seen corresponding path program 3 times [2024-06-14 12:17:02,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:02,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546804285] [2024-06-14 12:17:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:02,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:03,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:03,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546804285] [2024-06-14 12:17:03,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546804285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:03,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:03,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:03,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110028965] [2024-06-14 12:17:03,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:03,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:03,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:03,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:03,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:03,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:17:03,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 167 transitions, 1360 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:03,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:03,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:17:03,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:06,406 INFO L124 PetriNetUnfolderBase]: 12446/17347 cut-off events. [2024-06-14 12:17:06,406 INFO L125 PetriNetUnfolderBase]: For 477832/477960 co-relation queries the response was YES. [2024-06-14 12:17:06,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105863 conditions, 17347 events. 12446/17347 cut-off events. For 477832/477960 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 95503 event pairs, 5584 based on Foata normal form. 10/17305 useless extension candidates. Maximal degree in co-relation 105811. Up to 16515 conditions per place. [2024-06-14 12:17:06,589 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 149 selfloop transitions, 53 changer transitions 0/211 dead transitions. [2024-06-14 12:17:06,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 211 transitions, 1966 flow [2024-06-14 12:17:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:06,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 12:17:06,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 12:17:06,591 INFO L175 Difference]: Start difference. First operand has 124 places, 167 transitions, 1360 flow. Second operand 8 states and 192 transitions. [2024-06-14 12:17:06,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 211 transitions, 1966 flow [2024-06-14 12:17:06,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 211 transitions, 1882 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:17:06,902 INFO L231 Difference]: Finished difference. Result has 125 places, 170 transitions, 1472 flow [2024-06-14 12:17:06,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1472, PETRI_PLACES=125, PETRI_TRANSITIONS=170} [2024-06-14 12:17:06,902 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-14 12:17:06,902 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 170 transitions, 1472 flow [2024-06-14 12:17:06,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:06,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:06,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:06,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:17:06,903 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:17:06,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:06,904 INFO L85 PathProgramCache]: Analyzing trace with hash 846093688, now seen corresponding path program 1 times [2024-06-14 12:17:06,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:06,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250039663] [2024-06-14 12:17:06,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:06,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:08,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:08,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250039663] [2024-06-14 12:17:08,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250039663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:08,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:08,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:08,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198179270] [2024-06-14 12:17:08,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:08,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:08,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:08,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:08,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:08,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:17:08,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 170 transitions, 1472 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 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) [2024-06-14 12:17:08,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:08,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:17:08,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:12,138 INFO L124 PetriNetUnfolderBase]: 12563/17485 cut-off events. [2024-06-14 12:17:12,138 INFO L125 PetriNetUnfolderBase]: For 525350/525487 co-relation queries the response was YES. [2024-06-14 12:17:12,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109791 conditions, 17485 events. 12563/17485 cut-off events. For 525350/525487 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 95989 event pairs, 5293 based on Foata normal form. 18/17434 useless extension candidates. Maximal degree in co-relation 109738. Up to 16662 conditions per place. [2024-06-14 12:17:12,276 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 169 selfloop transitions, 42 changer transitions 0/220 dead transitions. [2024-06-14 12:17:12,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 220 transitions, 2118 flow [2024-06-14 12:17:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 12:17:12,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45990566037735847 [2024-06-14 12:17:12,277 INFO L175 Difference]: Start difference. First operand has 125 places, 170 transitions, 1472 flow. Second operand 8 states and 195 transitions. [2024-06-14 12:17:12,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 220 transitions, 2118 flow [2024-06-14 12:17:12,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 220 transitions, 1948 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:12,519 INFO L231 Difference]: Finished difference. Result has 127 places, 173 transitions, 1474 flow [2024-06-14 12:17:12,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1474, PETRI_PLACES=127, PETRI_TRANSITIONS=173} [2024-06-14 12:17:12,520 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-14 12:17:12,520 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 173 transitions, 1474 flow [2024-06-14 12:17:12,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 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) [2024-06-14 12:17:12,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:12,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:12,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:17:12,521 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)] === [2024-06-14 12:17:12,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:12,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1273617931, now seen corresponding path program 1 times [2024-06-14 12:17:12,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:12,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191112396] [2024-06-14 12:17:12,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:12,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:13,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:13,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191112396] [2024-06-14 12:17:13,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191112396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:13,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:13,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:17:13,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465791148] [2024-06-14 12:17:13,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:13,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:17:13,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:13,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:17:13,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:17:13,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:17:13,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 173 transitions, 1474 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:13,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:13,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:17:13,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:16,302 INFO L124 PetriNetUnfolderBase]: 11891/16781 cut-off events. [2024-06-14 12:17:16,302 INFO L125 PetriNetUnfolderBase]: For 560891/561060 co-relation queries the response was YES. [2024-06-14 12:17:16,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109130 conditions, 16781 events. 11891/16781 cut-off events. For 560891/561060 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 94855 event pairs, 5503 based on Foata normal form. 19/16699 useless extension candidates. Maximal degree in co-relation 109076. Up to 15849 conditions per place. [2024-06-14 12:17:16,433 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 154 selfloop transitions, 28 changer transitions 0/200 dead transitions. [2024-06-14 12:17:16,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 200 transitions, 1976 flow [2024-06-14 12:17:16,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:17:16,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:17:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 12:17:16,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559748427672956 [2024-06-14 12:17:16,435 INFO L175 Difference]: Start difference. First operand has 127 places, 173 transitions, 1474 flow. Second operand 6 states and 145 transitions. [2024-06-14 12:17:16,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 200 transitions, 1976 flow [2024-06-14 12:17:16,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 200 transitions, 1830 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:16,696 INFO L231 Difference]: Finished difference. Result has 127 places, 177 transitions, 1471 flow [2024-06-14 12:17:16,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1471, PETRI_PLACES=127, PETRI_TRANSITIONS=177} [2024-06-14 12:17:16,696 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-14 12:17:16,697 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 177 transitions, 1471 flow [2024-06-14 12:17:16,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:16,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:16,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:16,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:17:16,697 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:17:16,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2097261164, now seen corresponding path program 4 times [2024-06-14 12:17:16,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:16,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005186458] [2024-06-14 12:17:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:16,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:17,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:17,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005186458] [2024-06-14 12:17:17,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005186458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:17,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:17,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:17,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761441638] [2024-06-14 12:17:17,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:17,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:17,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:17,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:17,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:17,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:17:17,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 177 transitions, 1471 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:17,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:17,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:17:17,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:20,933 INFO L124 PetriNetUnfolderBase]: 12580/17506 cut-off events. [2024-06-14 12:17:20,933 INFO L125 PetriNetUnfolderBase]: For 604271/604430 co-relation queries the response was YES. [2024-06-14 12:17:21,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116073 conditions, 17506 events. 12580/17506 cut-off events. For 604271/604430 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96081 event pairs, 5544 based on Foata normal form. 6/17430 useless extension candidates. Maximal degree in co-relation 116018. Up to 16697 conditions per place. [2024-06-14 12:17:21,087 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 157 selfloop transitions, 53 changer transitions 0/219 dead transitions. [2024-06-14 12:17:21,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 219 transitions, 2099 flow [2024-06-14 12:17:21,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:21,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 12:17:21,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44575471698113206 [2024-06-14 12:17:21,089 INFO L175 Difference]: Start difference. First operand has 127 places, 177 transitions, 1471 flow. Second operand 8 states and 189 transitions. [2024-06-14 12:17:21,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 219 transitions, 2099 flow [2024-06-14 12:17:21,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 219 transitions, 2000 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:21,501 INFO L231 Difference]: Finished difference. Result has 131 places, 180 transitions, 1580 flow [2024-06-14 12:17:21,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1580, PETRI_PLACES=131, PETRI_TRANSITIONS=180} [2024-06-14 12:17:21,502 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-14 12:17:21,502 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 180 transitions, 1580 flow [2024-06-14 12:17:21,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:21,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:21,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:21,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:17:21,503 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:17:21,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:21,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1869175316, now seen corresponding path program 2 times [2024-06-14 12:17:21,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:21,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590108713] [2024-06-14 12:17:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:21,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:23,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:23,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590108713] [2024-06-14 12:17:23,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590108713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:23,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:23,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:23,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223368471] [2024-06-14 12:17:23,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:23,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:23,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:23,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:23,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:23,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:17:23,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 180 transitions, 1580 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 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) [2024-06-14 12:17:23,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:23,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:17:23,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:26,194 INFO L124 PetriNetUnfolderBase]: 12616/17563 cut-off events. [2024-06-14 12:17:26,194 INFO L125 PetriNetUnfolderBase]: For 654523/654698 co-relation queries the response was YES. [2024-06-14 12:17:26,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119471 conditions, 17563 events. 12616/17563 cut-off events. For 654523/654698 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96334 event pairs, 5249 based on Foata normal form. 20/17509 useless extension candidates. Maximal degree in co-relation 119415. Up to 16735 conditions per place. [2024-06-14 12:17:26,369 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 175 selfloop transitions, 43 changer transitions 0/227 dead transitions. [2024-06-14 12:17:26,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 227 transitions, 2244 flow [2024-06-14 12:17:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:26,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 12:17:26,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481132075471698 [2024-06-14 12:17:26,371 INFO L175 Difference]: Start difference. First operand has 131 places, 180 transitions, 1580 flow. Second operand 8 states and 190 transitions. [2024-06-14 12:17:26,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 227 transitions, 2244 flow [2024-06-14 12:17:26,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 227 transitions, 2062 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:26,844 INFO L231 Difference]: Finished difference. Result has 133 places, 183 transitions, 1584 flow [2024-06-14 12:17:26,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1584, PETRI_PLACES=133, PETRI_TRANSITIONS=183} [2024-06-14 12:17:26,845 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 77 predicate places. [2024-06-14 12:17:26,845 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 183 transitions, 1584 flow [2024-06-14 12:17:26,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 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) [2024-06-14 12:17:26,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:26,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:26,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:17:26,846 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:17:26,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:26,846 INFO L85 PathProgramCache]: Analyzing trace with hash -2097076466, now seen corresponding path program 3 times [2024-06-14 12:17:26,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:26,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946921904] [2024-06-14 12:17:26,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:26,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:28,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:28,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946921904] [2024-06-14 12:17:28,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946921904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:28,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:28,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:28,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015812052] [2024-06-14 12:17:28,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:28,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:28,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:28,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:28,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:28,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:17:28,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 183 transitions, 1584 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 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) [2024-06-14 12:17:28,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:28,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:17:28,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:31,604 INFO L124 PetriNetUnfolderBase]: 12652/17615 cut-off events. [2024-06-14 12:17:31,604 INFO L125 PetriNetUnfolderBase]: For 703010/703185 co-relation queries the response was YES. [2024-06-14 12:17:31,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122717 conditions, 17615 events. 12652/17615 cut-off events. For 703010/703185 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96557 event pairs, 5257 based on Foata normal form. 20/17561 useless extension candidates. Maximal degree in co-relation 122660. Up to 16787 conditions per place. [2024-06-14 12:17:31,760 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 180 selfloop transitions, 42 changer transitions 0/231 dead transitions. [2024-06-14 12:17:31,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 231 transitions, 2264 flow [2024-06-14 12:17:31,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:31,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:31,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 12:17:31,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 12:17:31,762 INFO L175 Difference]: Start difference. First operand has 133 places, 183 transitions, 1584 flow. Second operand 8 states and 192 transitions. [2024-06-14 12:17:31,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 231 transitions, 2264 flow [2024-06-14 12:17:32,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 231 transitions, 2104 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:32,079 INFO L231 Difference]: Finished difference. Result has 135 places, 186 transitions, 1614 flow [2024-06-14 12:17:32,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1614, PETRI_PLACES=135, PETRI_TRANSITIONS=186} [2024-06-14 12:17:32,079 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-14 12:17:32,079 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 186 transitions, 1614 flow [2024-06-14 12:17:32,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 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) [2024-06-14 12:17:32,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:32,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:32,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:17:32,080 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:17:32,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:32,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1860604436, now seen corresponding path program 4 times [2024-06-14 12:17:32,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:32,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100150251] [2024-06-14 12:17:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:32,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:33,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:33,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100150251] [2024-06-14 12:17:33,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100150251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:33,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:33,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:33,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519345339] [2024-06-14 12:17:33,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:33,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:33,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:33,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:33,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:33,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 12:17:33,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 186 transitions, 1614 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 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) [2024-06-14 12:17:33,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:33,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 12:17:33,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:36,668 INFO L124 PetriNetUnfolderBase]: 12637/17594 cut-off events. [2024-06-14 12:17:36,668 INFO L125 PetriNetUnfolderBase]: For 749289/749464 co-relation queries the response was YES. [2024-06-14 12:17:36,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125179 conditions, 17594 events. 12637/17594 cut-off events. For 749289/749464 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96606 event pairs, 4994 based on Foata normal form. 20/17540 useless extension candidates. Maximal degree in co-relation 125121. Up to 16638 conditions per place. [2024-06-14 12:17:36,819 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 170 selfloop transitions, 54 changer transitions 0/233 dead transitions. [2024-06-14 12:17:36,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 233 transitions, 2302 flow [2024-06-14 12:17:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 12:17:36,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481132075471698 [2024-06-14 12:17:36,821 INFO L175 Difference]: Start difference. First operand has 135 places, 186 transitions, 1614 flow. Second operand 8 states and 190 transitions. [2024-06-14 12:17:36,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 233 transitions, 2302 flow [2024-06-14 12:17:37,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 233 transitions, 2138 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:37,179 INFO L231 Difference]: Finished difference. Result has 137 places, 189 transitions, 1670 flow [2024-06-14 12:17:37,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1670, PETRI_PLACES=137, PETRI_TRANSITIONS=189} [2024-06-14 12:17:37,179 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-06-14 12:17:37,179 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 189 transitions, 1670 flow [2024-06-14 12:17:37,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 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) [2024-06-14 12:17:37,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:37,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:37,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:17:37,180 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)] === [2024-06-14 12:17:37,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1262190091, now seen corresponding path program 2 times [2024-06-14 12:17:37,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:37,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551649979] [2024-06-14 12:17:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:37,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat