./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix007.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/mix007.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/mix007.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix007.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 11:51:32,997 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:51:33,055 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:51:33,059 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:51:33,060 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:51:33,078 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:51:33,079 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:51:33,079 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:51:33,080 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:51:33,082 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:51:33,082 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:51:33,082 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:51:33,083 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:51:33,087 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:51:33,087 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:51:33,087 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:51:33,087 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:51:33,088 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:51:33,088 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:51:33,088 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:51:33,088 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:51:33,089 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:51:33,089 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:51:33,089 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:51:33,090 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:51:33,090 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:51:33,090 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:51:33,090 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:51:33,091 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:51:33,091 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:51:33,092 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:51:33,092 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:51:33,093 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:51:33,093 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:51:33,093 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:51:33,093 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:51:33,093 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:51:33,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:51:33,094 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:51:33,094 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:51:33,094 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:51:33,095 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:51:33,095 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:51:33,095 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:51:33,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:51:33,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:51:33,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:51:33,401 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:51:33,402 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:51:33,403 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix007.opt.i [2024-06-14 11:51:34,588 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:51:34,860 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:51:34,860 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix007.opt.i [2024-06-14 11:51:34,876 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adb3695c0/b3203daa295545cd869c2bc34a1583b1/FLAGc28900148 [2024-06-14 11:51:34,889 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adb3695c0/b3203daa295545cd869c2bc34a1583b1 [2024-06-14 11:51:34,892 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:51:34,892 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:51:34,893 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix007.opt.yml/witness.yml [2024-06-14 11:51:35,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:51:35,102 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:51:35,105 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:51:35,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:51:35,110 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:51:35,111 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:51:34" (1/2) ... [2024-06-14 11:51:35,112 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7280998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:51:35, skipping insertion in model container [2024-06-14 11:51:35,112 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:51:34" (1/2) ... [2024-06-14 11:51:35,114 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@38f01e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:51:35, skipping insertion in model container [2024-06-14 11:51:35,114 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:51:35" (2/2) ... [2024-06-14 11:51:35,115 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7280998 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:35, skipping insertion in model container [2024-06-14 11:51:35,115 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:51:35" (2/2) ... [2024-06-14 11:51:35,116 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:51:35,250 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:51:35,252 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) [2024-06-14 11:51:35,252 INFO L97 edCorrectnessWitness]: Location invariant before [L877-L877] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! 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 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) [2024-06-14 11:51:35,252 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) [2024-06-14 11:51:35,253 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! 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 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) [2024-06-14 11:51:35,253 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:51:35,254 INFO L106 edCorrectnessWitness]: ghost_update [L870-L870] multithreaded = 1; [2024-06-14 11:51:35,301 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:51:35,729 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:51:35,740 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 11:51:35,899 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:51:35,938 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:51:35,938 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:51:35 WrapperNode [2024-06-14 11:51:35,939 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:51:35,940 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:51:35,940 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:51:35,940 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:51:35,946 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 11:51:35" (1/1) ... [2024-06-14 11:51:35,963 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 11:51:35" (1/1) ... [2024-06-14 11:51:35,999 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 162 [2024-06-14 11:51:35,999 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:51:36,000 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:51:36,000 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:51:36,000 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:51:36,011 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 11:51:35" (1/1) ... [2024-06-14 11:51:36,011 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 11:51:35" (1/1) ... [2024-06-14 11:51:36,015 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 11:51:35" (1/1) ... [2024-06-14 11:51:36,033 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 11:51:36,034 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 11:51:35" (1/1) ... [2024-06-14 11:51:36,034 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 11:51:35" (1/1) ... [2024-06-14 11:51:36,045 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 11:51:35" (1/1) ... [2024-06-14 11:51:36,062 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 11:51:35" (1/1) ... [2024-06-14 11:51:36,064 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 11:51:35" (1/1) ... [2024-06-14 11:51:36,066 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 11:51:35" (1/1) ... [2024-06-14 11:51:36,071 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:51:36,072 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:51:36,072 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:51:36,072 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:51:36,073 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 11:51:35" (1/1) ... [2024-06-14 11:51:36,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:51:36,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:51:36,131 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 11:51:36,147 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 11:51:36,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:51:36,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:51:36,185 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:51:36,186 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:51:36,186 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:51:36,186 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:51:36,186 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:51:36,186 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:51:36,186 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 11:51:36,187 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 11:51:36,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:51:36,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:51:36,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:51:36,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:51:36,189 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 11:51:36,363 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:51:36,365 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:51:36,773 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:51:36,773 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:51:37,024 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:51:37,025 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:51:37,026 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:51:37 BoogieIcfgContainer [2024-06-14 11:51:37,026 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:51:37,029 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:51:37,029 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:51:37,032 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:51:37,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:51:34" (1/4) ... [2024-06-14 11:51:37,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55eca7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:51:37, skipping insertion in model container [2024-06-14 11:51:37,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:51:35" (2/4) ... [2024-06-14 11:51:37,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55eca7a8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:51:37, skipping insertion in model container [2024-06-14 11:51:37,034 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 11:51:35" (3/4) ... [2024-06-14 11:51:37,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55eca7a8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:51:37, skipping insertion in model container [2024-06-14 11:51:37,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:51:37" (4/4) ... [2024-06-14 11:51:37,035 INFO L112 eAbstractionObserver]: Analyzing ICFG mix007.opt.i [2024-06-14 11:51:37,051 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:51:37,051 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 11:51:37,051 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:51:37,131 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:51:37,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 11:51:37,209 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-14 11:51:37,210 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:51:37,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:51:37,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 11:51:37,217 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-14 11:51:37,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:51:37,233 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;@3e625013, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:51:37,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 11:51:37,238 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:51:37,238 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:51:37,238 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:51:37,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:37,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:51:37,240 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 11:51:37,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:37,244 INFO L85 PathProgramCache]: Analyzing trace with hash 197709233, now seen corresponding path program 1 times [2024-06-14 11:51:37,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:37,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216276961] [2024-06-14 11:51:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:37,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:38,802 INFO 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 11:51:38,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:38,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216276961] [2024-06-14 11:51:38,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216276961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:38,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:38,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:51:38,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285897198] [2024-06-14 11:51:38,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:38,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:51:38,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:38,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:51:38,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:51:38,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-06-14 11:51:38,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:38,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:38,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-06-14 11:51:38,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:40,316 INFO L124 PetriNetUnfolderBase]: 6197/8862 cut-off events. [2024-06-14 11:51:40,316 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-06-14 11:51:40,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17610 conditions, 8862 events. 6197/8862 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 51061 event pairs, 4558 based on Foata normal form. 1/8588 useless extension candidates. Maximal degree in co-relation 17594. Up to 8479 conditions per place. [2024-06-14 11:51:40,460 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 43 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-14 11:51:40,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 233 flow [2024-06-14 11:51:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:51:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:51:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-14 11:51:40,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-06-14 11:51:40,475 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 103 transitions. [2024-06-14 11:51:40,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 233 flow [2024-06-14 11:51:40,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:51:40,486 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-14 11:51:40,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-14 11:51:40,491 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-14 11:51:40,492 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-14 11:51:40,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:40,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:40,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:40,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:51:40,493 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 11:51:40,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:40,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1020068048, now seen corresponding path program 1 times [2024-06-14 11:51:40,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:40,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714424481] [2024-06-14 11:51:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:40,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:41,624 INFO 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 11:51:41,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:41,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714424481] [2024-06-14 11:51:41,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714424481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:41,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:41,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:51:41,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283390377] [2024-06-14 11:51:41,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:41,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:51:41,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:41,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:51:41,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:51:41,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-14 11:51:41,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:41,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:41,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-14 11:51:41,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:43,173 INFO L124 PetriNetUnfolderBase]: 7092/9903 cut-off events. [2024-06-14 11:51:43,173 INFO L125 PetriNetUnfolderBase]: For 2109/2109 co-relation queries the response was YES. [2024-06-14 11:51:43,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22632 conditions, 9903 events. 7092/9903 cut-off events. For 2109/2109 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 55557 event pairs, 4490 based on Foata normal form. 4/9846 useless extension candidates. Maximal degree in co-relation 22617. Up to 9649 conditions per place. [2024-06-14 11:51:43,260 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 54 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-14 11:51:43,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 327 flow [2024-06-14 11:51:43,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:51:43,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:51:43,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-14 11:51:43,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-06-14 11:51:43,263 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 131 transitions. [2024-06-14 11:51:43,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 327 flow [2024-06-14 11:51:43,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:51:43,265 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-14 11:51:43,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-14 11:51:43,266 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-14 11:51:43,267 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-14 11:51:43,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:43,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:43,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:43,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:51:43,268 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 11:51:43,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:43,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1955403079, now seen corresponding path program 1 times [2024-06-14 11:51:43,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:43,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319816136] [2024-06-14 11:51:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:43,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:44,703 INFO 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 11:51:44,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:44,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319816136] [2024-06-14 11:51:44,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319816136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:44,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:44,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:51:44,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14102465] [2024-06-14 11:51:44,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:44,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:51:44,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:44,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:51:44,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:51:44,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:51:44,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:44,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:44,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:51:44,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:46,782 INFO L124 PetriNetUnfolderBase]: 9006/12501 cut-off events. [2024-06-14 11:51:46,783 INFO L125 PetriNetUnfolderBase]: For 7145/7145 co-relation queries the response was YES. [2024-06-14 11:51:46,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31646 conditions, 12501 events. 9006/12501 cut-off events. For 7145/7145 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 68661 event pairs, 4478 based on Foata normal form. 8/12431 useless extension candidates. Maximal degree in co-relation 31629. Up to 12137 conditions per place. [2024-06-14 11:51:46,875 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 72 selfloop transitions, 16 changer transitions 0/96 dead transitions. [2024-06-14 11:51:46,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 492 flow [2024-06-14 11:51:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:51:46,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:51:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-14 11:51:46,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617283950617284 [2024-06-14 11:51:46,882 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 6 states and 182 transitions. [2024-06-14 11:51:46,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 492 flow [2024-06-14 11:51:46,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 96 transitions, 464 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 11:51:46,888 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 245 flow [2024-06-14 11:51:46,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-14 11:51:46,890 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2024-06-14 11:51:46,890 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 245 flow [2024-06-14 11:51:46,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:46,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:46,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:46,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:51:46,891 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 11:51:46,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:46,892 INFO L85 PathProgramCache]: Analyzing trace with hash 747619329, now seen corresponding path program 1 times [2024-06-14 11:51:46,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:46,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821269316] [2024-06-14 11:51:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:46,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:47,932 INFO 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 11:51:47,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:47,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821269316] [2024-06-14 11:51:47,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821269316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:47,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:47,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:51:47,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908917420] [2024-06-14 11:51:47,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:47,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:51:47,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:47,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:51:47,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:51:48,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:51:48,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 245 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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 11:51:48,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:48,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:51:48,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:49,994 INFO L124 PetriNetUnfolderBase]: 7847/11210 cut-off events. [2024-06-14 11:51:49,995 INFO L125 PetriNetUnfolderBase]: For 11603/11603 co-relation queries the response was YES. [2024-06-14 11:51:50,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31011 conditions, 11210 events. 7847/11210 cut-off events. For 11603/11603 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 63768 event pairs, 4266 based on Foata normal form. 3/11085 useless extension candidates. Maximal degree in co-relation 30992. Up to 10669 conditions per place. [2024-06-14 11:51:50,074 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 60 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-14 11:51:50,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 79 transitions, 451 flow [2024-06-14 11:51:50,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:51:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:51:50,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 11:51:50,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074074074074074 [2024-06-14 11:51:50,076 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 245 flow. Second operand 5 states and 137 transitions. [2024-06-14 11:51:50,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 79 transitions, 451 flow [2024-06-14 11:51:50,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 413 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 11:51:50,084 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 268 flow [2024-06-14 11:51:50,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-14 11:51:50,086 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2024-06-14 11:51:50,086 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 268 flow [2024-06-14 11:51:50,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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 11:51:50,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:50,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:50,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:51:50,087 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 11:51:50,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:50,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1727283011, now seen corresponding path program 1 times [2024-06-14 11:51:50,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:50,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054940056] [2024-06-14 11:51:50,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:50,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:51,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:51,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054940056] [2024-06-14 11:51:51,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054940056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:51,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:51,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:51:51,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655880495] [2024-06-14 11:51:51,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:51,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:51:51,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:51,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:51:51,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:51:51,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:51:51,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:51,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:51,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:51:51,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:53,227 INFO L124 PetriNetUnfolderBase]: 9514/13370 cut-off events. [2024-06-14 11:51:53,227 INFO L125 PetriNetUnfolderBase]: For 21088/21088 co-relation queries the response was YES. [2024-06-14 11:51:53,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40102 conditions, 13370 events. 9514/13370 cut-off events. For 21088/21088 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 74888 event pairs, 5008 based on Foata normal form. 5/13226 useless extension candidates. Maximal degree in co-relation 40081. Up to 12824 conditions per place. [2024-06-14 11:51:53,323 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 74 selfloop transitions, 22 changer transitions 0/104 dead transitions. [2024-06-14 11:51:53,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 104 transitions, 642 flow [2024-06-14 11:51:53,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:51:53,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:51:53,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-14 11:51:53,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2024-06-14 11:51:53,327 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 268 flow. Second operand 6 states and 166 transitions. [2024-06-14 11:51:53,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 104 transitions, 642 flow [2024-06-14 11:51:53,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 613 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 11:51:53,336 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 409 flow [2024-06-14 11:51:53,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=409, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-06-14 11:51:53,344 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-14 11:51:53,344 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 409 flow [2024-06-14 11:51:53,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:53,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:53,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:53,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:51:53,345 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 11:51:53,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:53,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1516510580, now seen corresponding path program 1 times [2024-06-14 11:51:53,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:53,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058583439] [2024-06-14 11:51:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:53,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:54,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:54,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058583439] [2024-06-14 11:51:54,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058583439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:54,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:54,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:51:54,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627479928] [2024-06-14 11:51:54,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:54,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:51:54,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:54,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:51:54,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:51:54,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:51:54,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 409 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:54,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:54,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:51:54,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:56,611 INFO L124 PetriNetUnfolderBase]: 10342/14426 cut-off events. [2024-06-14 11:51:56,611 INFO L125 PetriNetUnfolderBase]: For 39871/39893 co-relation queries the response was YES. [2024-06-14 11:51:56,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49196 conditions, 14426 events. 10342/14426 cut-off events. For 39871/39893 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 81150 event pairs, 5221 based on Foata normal form. 11/14340 useless extension candidates. Maximal degree in co-relation 49172. Up to 13919 conditions per place. [2024-06-14 11:51:56,750 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 82 selfloop transitions, 21 changer transitions 0/114 dead transitions. [2024-06-14 11:51:56,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 114 transitions, 789 flow [2024-06-14 11:51:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:51:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:51:56,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-14 11:51:56,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2024-06-14 11:51:56,752 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 409 flow. Second operand 6 states and 166 transitions. [2024-06-14 11:51:56,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 114 transitions, 789 flow [2024-06-14 11:51:56,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 114 transitions, 767 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-14 11:51:56,768 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 516 flow [2024-06-14 11:51:56,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=516, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2024-06-14 11:51:56,771 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2024-06-14 11:51:56,771 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 516 flow [2024-06-14 11:51:56,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:56,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:56,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:56,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:51:56,772 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 11:51:56,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:56,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2032971906, now seen corresponding path program 2 times [2024-06-14 11:51:56,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:56,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693839842] [2024-06-14 11:51:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:56,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:57,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:57,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693839842] [2024-06-14 11:51:57,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693839842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:57,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:57,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:51:57,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670919786] [2024-06-14 11:51:57,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:57,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:51:57,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:51:57,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:51:57,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:51:57,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 516 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:57,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:57,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:51:57,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:59,534 INFO L124 PetriNetUnfolderBase]: 10333/14415 cut-off events. [2024-06-14 11:51:59,534 INFO L125 PetriNetUnfolderBase]: For 53666/53684 co-relation queries the response was YES. [2024-06-14 11:51:59,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52797 conditions, 14415 events. 10333/14415 cut-off events. For 53666/53684 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 81139 event pairs, 5224 based on Foata normal form. 9/14327 useless extension candidates. Maximal degree in co-relation 52770. Up to 13910 conditions per place. [2024-06-14 11:51:59,665 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 76 selfloop transitions, 21 changer transitions 0/108 dead transitions. [2024-06-14 11:51:59,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 108 transitions, 772 flow [2024-06-14 11:51:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:51:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:51:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 11:51:59,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-06-14 11:51:59,667 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 516 flow. Second operand 6 states and 160 transitions. [2024-06-14 11:51:59,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 108 transitions, 772 flow [2024-06-14 11:51:59,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 108 transitions, 714 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-14 11:51:59,716 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 511 flow [2024-06-14 11:51:59,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=511, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-14 11:51:59,717 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2024-06-14 11:51:59,717 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 511 flow [2024-06-14 11:51:59,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:59,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:59,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:59,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:51:59,718 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 11:51:59,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:59,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1721780530, now seen corresponding path program 1 times [2024-06-14 11:51:59,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:59,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006111090] [2024-06-14 11:51:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:59,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:00,928 INFO 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 11:52:00,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:00,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006111090] [2024-06-14 11:52:00,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006111090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:00,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:00,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:00,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879714078] [2024-06-14 11:52:00,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:00,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:00,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:00,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:00,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:01,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:52:01,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 511 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:01,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:01,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:52:01,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:02,728 INFO L124 PetriNetUnfolderBase]: 10424/14553 cut-off events. [2024-06-14 11:52:02,729 INFO L125 PetriNetUnfolderBase]: For 60031/60045 co-relation queries the response was YES. [2024-06-14 11:52:02,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53778 conditions, 14553 events. 10424/14553 cut-off events. For 60031/60045 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 81815 event pairs, 5214 based on Foata normal form. 7/14465 useless extension candidates. Maximal degree in co-relation 53749. Up to 14012 conditions per place. [2024-06-14 11:52:02,839 INFO L140 encePairwiseOnDemand]: 39/54 looper letters, 100 selfloop transitions, 32 changer transitions 0/143 dead transitions. [2024-06-14 11:52:02,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 143 transitions, 1002 flow [2024-06-14 11:52:02,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-14 11:52:02,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-14 11:52:02,841 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 511 flow. Second operand 8 states and 215 transitions. [2024-06-14 11:52:02,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 143 transitions, 1002 flow [2024-06-14 11:52:02,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 143 transitions, 928 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:02,876 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 669 flow [2024-06-14 11:52:02,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=669, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2024-06-14 11:52:02,878 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 26 predicate places. [2024-06-14 11:52:02,878 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 669 flow [2024-06-14 11:52:02,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:02,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:02,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:02,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:52:02,879 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 11:52:02,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:02,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1548356402, now seen corresponding path program 2 times [2024-06-14 11:52:02,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:02,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131265789] [2024-06-14 11:52:02,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:02,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:04,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:04,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131265789] [2024-06-14 11:52:04,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131265789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:04,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:04,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:04,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359048121] [2024-06-14 11:52:04,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:04,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:04,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:04,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:04,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:04,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:52:04,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 669 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:04,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:04,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:52:04,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:06,185 INFO L124 PetriNetUnfolderBase]: 10430/14571 cut-off events. [2024-06-14 11:52:06,185 INFO L125 PetriNetUnfolderBase]: For 76605/76625 co-relation queries the response was YES. [2024-06-14 11:52:06,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57804 conditions, 14571 events. 10430/14571 cut-off events. For 76605/76625 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 81796 event pairs, 5054 based on Foata normal form. 11/14485 useless extension candidates. Maximal degree in co-relation 57773. Up to 14004 conditions per place. [2024-06-14 11:52:06,298 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 100 selfloop transitions, 34 changer transitions 0/145 dead transitions. [2024-06-14 11:52:06,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 145 transitions, 1113 flow [2024-06-14 11:52:06,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:06,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:06,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 11:52:06,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 11:52:06,300 INFO L175 Difference]: Start difference. First operand has 83 places, 103 transitions, 669 flow. Second operand 7 states and 189 transitions. [2024-06-14 11:52:06,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 145 transitions, 1113 flow [2024-06-14 11:52:06,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 145 transitions, 1049 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 11:52:06,339 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 746 flow [2024-06-14 11:52:06,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=746, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2024-06-14 11:52:06,340 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2024-06-14 11:52:06,341 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 746 flow [2024-06-14 11:52:06,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:06,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:06,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:06,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:52:06,341 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 11:52:06,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:06,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1548236246, now seen corresponding path program 1 times [2024-06-14 11:52:06,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:06,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082762061] [2024-06-14 11:52:06,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:06,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:07,408 INFO 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 11:52:07,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:07,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082762061] [2024-06-14 11:52:07,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082762061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:07,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:07,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:07,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206107221] [2024-06-14 11:52:07,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:07,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:07,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:07,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:07,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:07,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:07,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 746 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:07,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:07,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:07,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:09,461 INFO L124 PetriNetUnfolderBase]: 11124/15303 cut-off events. [2024-06-14 11:52:09,462 INFO L125 PetriNetUnfolderBase]: For 99290/99301 co-relation queries the response was YES. [2024-06-14 11:52:09,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64357 conditions, 15303 events. 11124/15303 cut-off events. For 99290/99301 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 82873 event pairs, 5222 based on Foata normal form. 15/15304 useless extension candidates. Maximal degree in co-relation 64325. Up to 14738 conditions per place. [2024-06-14 11:52:09,572 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 117 selfloop transitions, 43 changer transitions 0/167 dead transitions. [2024-06-14 11:52:09,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 167 transitions, 1488 flow [2024-06-14 11:52:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:09,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:09,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-14 11:52:09,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-14 11:52:09,574 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 746 flow. Second operand 7 states and 196 transitions. [2024-06-14 11:52:09,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 167 transitions, 1488 flow [2024-06-14 11:52:09,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 167 transitions, 1357 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 11:52:09,624 INFO L231 Difference]: Finished difference. Result has 91 places, 122 transitions, 906 flow [2024-06-14 11:52:09,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=906, PETRI_PLACES=91, PETRI_TRANSITIONS=122} [2024-06-14 11:52:09,625 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 34 predicate places. [2024-06-14 11:52:09,625 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 122 transitions, 906 flow [2024-06-14 11:52:09,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:09,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:09,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:09,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:52:09,626 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 11:52:09,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:09,626 INFO L85 PathProgramCache]: Analyzing trace with hash -232810340, now seen corresponding path program 3 times [2024-06-14 11:52:09,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:09,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355173886] [2024-06-14 11:52:09,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:09,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:10,678 INFO 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 11:52:10,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:10,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355173886] [2024-06-14 11:52:10,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355173886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:10,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:10,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:10,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474254763] [2024-06-14 11:52:10,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:10,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:10,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:10,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:10,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:10,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:52:10,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 122 transitions, 906 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:10,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:10,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:52:10,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:12,750 INFO L124 PetriNetUnfolderBase]: 10592/14789 cut-off events. [2024-06-14 11:52:12,750 INFO L125 PetriNetUnfolderBase]: For 102595/102713 co-relation queries the response was YES. [2024-06-14 11:52:12,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64246 conditions, 14789 events. 10592/14789 cut-off events. For 102595/102713 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 82735 event pairs, 4893 based on Foata normal form. 11/14695 useless extension candidates. Maximal degree in co-relation 64211. Up to 14097 conditions per place. [2024-06-14 11:52:12,853 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 102 selfloop transitions, 50 changer transitions 0/166 dead transitions. [2024-06-14 11:52:12,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 166 transitions, 1482 flow [2024-06-14 11:52:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-14 11:52:12,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105820105820106 [2024-06-14 11:52:12,855 INFO L175 Difference]: Start difference. First operand has 91 places, 122 transitions, 906 flow. Second operand 7 states and 193 transitions. [2024-06-14 11:52:12,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 166 transitions, 1482 flow [2024-06-14 11:52:12,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 166 transitions, 1414 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-14 11:52:12,913 INFO L231 Difference]: Finished difference. Result has 96 places, 130 transitions, 1065 flow [2024-06-14 11:52:12,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1065, PETRI_PLACES=96, PETRI_TRANSITIONS=130} [2024-06-14 11:52:12,914 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 39 predicate places. [2024-06-14 11:52:12,914 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 130 transitions, 1065 flow [2024-06-14 11:52:12,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:12,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:12,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:12,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:52:12,915 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 11:52:12,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:12,915 INFO L85 PathProgramCache]: Analyzing trace with hash 602113156, now seen corresponding path program 2 times [2024-06-14 11:52:12,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:12,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839681078] [2024-06-14 11:52:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:12,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:13,990 INFO 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 11:52:13,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:13,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839681078] [2024-06-14 11:52:13,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839681078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:13,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:13,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:13,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073292157] [2024-06-14 11:52:13,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:13,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:13,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:13,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:13,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:14,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:14,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 130 transitions, 1065 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:14,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:14,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:14,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:16,257 INFO L124 PetriNetUnfolderBase]: 11212/15447 cut-off events. [2024-06-14 11:52:16,257 INFO L125 PetriNetUnfolderBase]: For 129812/129835 co-relation queries the response was YES. [2024-06-14 11:52:16,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71099 conditions, 15447 events. 11212/15447 cut-off events. For 129812/129835 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 83946 event pairs, 5240 based on Foata normal form. 21/15455 useless extension candidates. Maximal degree in co-relation 71062. Up to 14834 conditions per place. [2024-06-14 11:52:16,360 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 119 selfloop transitions, 59 changer transitions 0/185 dead transitions. [2024-06-14 11:52:16,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 185 transitions, 1842 flow [2024-06-14 11:52:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:16,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-14 11:52:16,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-14 11:52:16,365 INFO L175 Difference]: Start difference. First operand has 96 places, 130 transitions, 1065 flow. Second operand 7 states and 192 transitions. [2024-06-14 11:52:16,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 185 transitions, 1842 flow [2024-06-14 11:52:16,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 185 transitions, 1763 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 11:52:16,466 INFO L231 Difference]: Finished difference. Result has 101 places, 144 transitions, 1302 flow [2024-06-14 11:52:16,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1302, PETRI_PLACES=101, PETRI_TRANSITIONS=144} [2024-06-14 11:52:16,467 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2024-06-14 11:52:16,467 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 144 transitions, 1302 flow [2024-06-14 11:52:16,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:16,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:16,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:16,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:52:16,467 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 11:52:16,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:16,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1543594802, now seen corresponding path program 4 times [2024-06-14 11:52:16,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:16,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104464512] [2024-06-14 11:52:16,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:16,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:17,493 INFO 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 11:52:17,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:17,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104464512] [2024-06-14 11:52:17,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104464512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:17,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:17,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:17,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76403958] [2024-06-14 11:52:17,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:17,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:17,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:17,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:17,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:17,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:52:17,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 144 transitions, 1302 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:17,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:17,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:52:17,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:19,663 INFO L124 PetriNetUnfolderBase]: 10648/14877 cut-off events. [2024-06-14 11:52:19,663 INFO L125 PetriNetUnfolderBase]: For 147319/147421 co-relation queries the response was YES. [2024-06-14 11:52:19,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71190 conditions, 14877 events. 10648/14877 cut-off events. For 147319/147421 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 83312 event pairs, 4902 based on Foata normal form. 5/14768 useless extension candidates. Maximal degree in co-relation 71150. Up to 14162 conditions per place. [2024-06-14 11:52:19,768 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 108 selfloop transitions, 50 changer transitions 0/175 dead transitions. [2024-06-14 11:52:19,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 175 transitions, 1716 flow [2024-06-14 11:52:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:19,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-14 11:52:19,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-14 11:52:19,770 INFO L175 Difference]: Start difference. First operand has 101 places, 144 transitions, 1302 flow. Second operand 7 states and 187 transitions. [2024-06-14 11:52:19,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 175 transitions, 1716 flow [2024-06-14 11:52:19,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 175 transitions, 1644 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-14 11:52:19,879 INFO L231 Difference]: Finished difference. Result has 107 places, 144 transitions, 1341 flow [2024-06-14 11:52:19,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1341, PETRI_PLACES=107, PETRI_TRANSITIONS=144} [2024-06-14 11:52:19,880 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 50 predicate places. [2024-06-14 11:52:19,880 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 144 transitions, 1341 flow [2024-06-14 11:52:19,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:19,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:19,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:19,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:52:19,881 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 11:52:19,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:19,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1371104726, now seen corresponding path program 3 times [2024-06-14 11:52:19,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:19,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341850110] [2024-06-14 11:52:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:19,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:20,934 INFO 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 11:52:20,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:20,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341850110] [2024-06-14 11:52:20,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341850110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:20,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:20,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:20,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744904479] [2024-06-14 11:52:20,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:20,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:20,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:20,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:20,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:21,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:21,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 144 transitions, 1341 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:21,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:21,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:21,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:23,054 INFO L124 PetriNetUnfolderBase]: 11192/15421 cut-off events. [2024-06-14 11:52:23,054 INFO L125 PetriNetUnfolderBase]: For 156751/156774 co-relation queries the response was YES. [2024-06-14 11:52:23,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73729 conditions, 15421 events. 11192/15421 cut-off events. For 156751/156774 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 83807 event pairs, 5240 based on Foata normal form. 21/15429 useless extension candidates. Maximal degree in co-relation 73686. Up to 14815 conditions per place. [2024-06-14 11:52:23,404 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 123 selfloop transitions, 54 changer transitions 0/184 dead transitions. [2024-06-14 11:52:23,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 184 transitions, 1967 flow [2024-06-14 11:52:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:23,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-14 11:52:23,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-14 11:52:23,406 INFO L175 Difference]: Start difference. First operand has 107 places, 144 transitions, 1341 flow. Second operand 7 states and 191 transitions. [2024-06-14 11:52:23,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 184 transitions, 1967 flow [2024-06-14 11:52:23,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 184 transitions, 1811 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:23,498 INFO L231 Difference]: Finished difference. Result has 108 places, 144 transitions, 1306 flow [2024-06-14 11:52:23,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1306, PETRI_PLACES=108, PETRI_TRANSITIONS=144} [2024-06-14 11:52:23,500 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 51 predicate places. [2024-06-14 11:52:23,500 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 144 transitions, 1306 flow [2024-06-14 11:52:23,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:23,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:23,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:23,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:52:23,501 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 11:52:23,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:23,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2061666242, now seen corresponding path program 1 times [2024-06-14 11:52:23,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:23,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023955398] [2024-06-14 11:52:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:23,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:24,557 INFO 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 11:52:24,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:24,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023955398] [2024-06-14 11:52:24,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023955398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:24,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:24,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:24,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193309871] [2024-06-14 11:52:24,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:24,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:24,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:24,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:24,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:24,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:52:24,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 144 transitions, 1306 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:24,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:24,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:52:24,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:26,506 INFO L124 PetriNetUnfolderBase]: 9817/13864 cut-off events. [2024-06-14 11:52:26,506 INFO L125 PetriNetUnfolderBase]: For 147093/147098 co-relation queries the response was YES. [2024-06-14 11:52:26,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66995 conditions, 13864 events. 9817/13864 cut-off events. For 147093/147098 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 78019 event pairs, 4372 based on Foata normal form. 12/13757 useless extension candidates. Maximal degree in co-relation 66951. Up to 13184 conditions per place. [2024-06-14 11:52:26,620 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 150 selfloop transitions, 26 changer transitions 0/184 dead transitions. [2024-06-14 11:52:26,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 184 transitions, 1926 flow [2024-06-14 11:52:26,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:26,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-14 11:52:26,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-14 11:52:26,622 INFO L175 Difference]: Start difference. First operand has 108 places, 144 transitions, 1306 flow. Second operand 7 states and 192 transitions. [2024-06-14 11:52:26,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 184 transitions, 1926 flow [2024-06-14 11:52:26,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 184 transitions, 1789 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 11:52:26,749 INFO L231 Difference]: Finished difference. Result has 108 places, 148 transitions, 1296 flow [2024-06-14 11:52:26,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1296, PETRI_PLACES=108, PETRI_TRANSITIONS=148} [2024-06-14 11:52:26,750 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 51 predicate places. [2024-06-14 11:52:26,750 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 148 transitions, 1296 flow [2024-06-14 11:52:26,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:26,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:26,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:26,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:52:26,750 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 11:52:26,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:26,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1430897352, now seen corresponding path program 1 times [2024-06-14 11:52:26,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:26,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902602217] [2024-06-14 11:52:26,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:26,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:27,581 INFO 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 11:52:27,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:27,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902602217] [2024-06-14 11:52:27,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902602217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:27,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:27,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:52:27,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095875202] [2024-06-14 11:52:27,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:27,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:52:27,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:27,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:52:27,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:52:27,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:52:27,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 148 transitions, 1296 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:27,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:27,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:52:27,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:29,261 INFO L124 PetriNetUnfolderBase]: 9241/13272 cut-off events. [2024-06-14 11:52:29,261 INFO L125 PetriNetUnfolderBase]: For 163884/163901 co-relation queries the response was YES. [2024-06-14 11:52:29,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67104 conditions, 13272 events. 9241/13272 cut-off events. For 163884/163901 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 77169 event pairs, 4523 based on Foata normal form. 17/13165 useless extension candidates. Maximal degree in co-relation 67061. Up to 12528 conditions per place. [2024-06-14 11:52:29,383 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 133 selfloop transitions, 10 changer transitions 0/162 dead transitions. [2024-06-14 11:52:29,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 162 transitions, 1626 flow [2024-06-14 11:52:29,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:52:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:52:29,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-14 11:52:29,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925925925925926 [2024-06-14 11:52:29,384 INFO L175 Difference]: Start difference. First operand has 108 places, 148 transitions, 1296 flow. Second operand 5 states and 133 transitions. [2024-06-14 11:52:29,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 162 transitions, 1626 flow [2024-06-14 11:52:29,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 162 transitions, 1519 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 11:52:29,489 INFO L231 Difference]: Finished difference. Result has 108 places, 148 transitions, 1218 flow [2024-06-14 11:52:29,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1218, PETRI_PLACES=108, PETRI_TRANSITIONS=148} [2024-06-14 11:52:29,490 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 51 predicate places. [2024-06-14 11:52:29,490 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 148 transitions, 1218 flow [2024-06-14 11:52:29,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:29,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:29,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:29,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:52:29,491 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 11:52:29,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:29,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1369097104, now seen corresponding path program 1 times [2024-06-14 11:52:29,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:29,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398363083] [2024-06-14 11:52:29,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:29,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:30,562 INFO 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 11:52:30,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:30,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398363083] [2024-06-14 11:52:30,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398363083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:30,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:30,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:30,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464203555] [2024-06-14 11:52:30,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:30,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:30,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:30,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:30,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:30,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:30,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 148 transitions, 1218 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:30,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:30,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:30,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:32,691 INFO L124 PetriNetUnfolderBase]: 11294/15723 cut-off events. [2024-06-14 11:52:32,692 INFO L125 PetriNetUnfolderBase]: For 216206/216217 co-relation queries the response was YES. [2024-06-14 11:52:32,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79680 conditions, 15723 events. 11294/15723 cut-off events. For 216206/216217 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 87953 event pairs, 5134 based on Foata normal form. 15/15725 useless extension candidates. Maximal degree in co-relation 79636. Up to 15032 conditions per place. [2024-06-14 11:52:32,825 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 158 selfloop transitions, 48 changer transitions 0/213 dead transitions. [2024-06-14 11:52:32,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 213 transitions, 2146 flow [2024-06-14 11:52:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-14 11:52:32,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2024-06-14 11:52:32,828 INFO L175 Difference]: Start difference. First operand has 108 places, 148 transitions, 1218 flow. Second operand 8 states and 219 transitions. [2024-06-14 11:52:32,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 213 transitions, 2146 flow [2024-06-14 11:52:32,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 213 transitions, 2117 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:32,927 INFO L231 Difference]: Finished difference. Result has 114 places, 162 transitions, 1519 flow [2024-06-14 11:52:32,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1519, PETRI_PLACES=114, PETRI_TRANSITIONS=162} [2024-06-14 11:52:32,927 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 57 predicate places. [2024-06-14 11:52:32,927 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 162 transitions, 1519 flow [2024-06-14 11:52:32,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:32,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:32,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:32,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:52:32,928 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 11:52:32,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:32,929 INFO L85 PathProgramCache]: Analyzing trace with hash -719784210, now seen corresponding path program 2 times [2024-06-14 11:52:32,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:32,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887803776] [2024-06-14 11:52:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:32,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:34,024 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 11:52:34,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:34,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887803776] [2024-06-14 11:52:34,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887803776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:34,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:34,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:34,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228339915] [2024-06-14 11:52:34,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:34,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:34,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:34,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:34,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:34,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:34,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 162 transitions, 1519 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:34,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:34,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:34,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:36,445 INFO L124 PetriNetUnfolderBase]: 11437/15943 cut-off events. [2024-06-14 11:52:36,445 INFO L125 PetriNetUnfolderBase]: For 260490/260495 co-relation queries the response was YES. [2024-06-14 11:52:36,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87129 conditions, 15943 events. 11437/15943 cut-off events. For 260490/260495 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 89363 event pairs, 5068 based on Foata normal form. 7/15930 useless extension candidates. Maximal degree in co-relation 87083. Up to 14745 conditions per place. [2024-06-14 11:52:36,582 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 128 selfloop transitions, 98 changer transitions 0/233 dead transitions. [2024-06-14 11:52:36,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 233 transitions, 2747 flow [2024-06-14 11:52:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:36,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:36,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-14 11:52:36,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254629629629629 [2024-06-14 11:52:36,584 INFO L175 Difference]: Start difference. First operand has 114 places, 162 transitions, 1519 flow. Second operand 8 states and 227 transitions. [2024-06-14 11:52:36,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 233 transitions, 2747 flow [2024-06-14 11:52:36,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 233 transitions, 2602 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:36,735 INFO L231 Difference]: Finished difference. Result has 120 places, 181 transitions, 1928 flow [2024-06-14 11:52:36,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1928, PETRI_PLACES=120, PETRI_TRANSITIONS=181} [2024-06-14 11:52:36,736 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-14 11:52:36,736 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 181 transitions, 1928 flow [2024-06-14 11:52:36,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:36,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:36,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:36,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:52:36,737 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 11:52:36,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:36,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1372816174, now seen corresponding path program 3 times [2024-06-14 11:52:36,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:36,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135198415] [2024-06-14 11:52:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:36,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:37,794 INFO 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 11:52:37,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:37,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135198415] [2024-06-14 11:52:37,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135198415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:37,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:37,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:37,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736369973] [2024-06-14 11:52:37,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:37,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:37,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:37,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:37,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:37,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:37,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 181 transitions, 1928 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:37,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:37,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:37,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:40,373 INFO L124 PetriNetUnfolderBase]: 11426/15929 cut-off events. [2024-06-14 11:52:40,373 INFO L125 PetriNetUnfolderBase]: For 308467/308472 co-relation queries the response was YES. [2024-06-14 11:52:40,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93147 conditions, 15929 events. 11426/15929 cut-off events. For 308467/308472 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 89279 event pairs, 5068 based on Foata normal form. 7/15916 useless extension candidates. Maximal degree in co-relation 93098. Up to 14738 conditions per place. [2024-06-14 11:52:40,516 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 133 selfloop transitions, 92 changer transitions 0/232 dead transitions. [2024-06-14 11:52:40,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 232 transitions, 2872 flow [2024-06-14 11:52:40,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-14 11:52:40,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-14 11:52:40,518 INFO L175 Difference]: Start difference. First operand has 120 places, 181 transitions, 1928 flow. Second operand 8 states and 226 transitions. [2024-06-14 11:52:40,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 232 transitions, 2872 flow [2024-06-14 11:52:40,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 232 transitions, 2714 flow, removed 70 selfloop flow, removed 2 redundant places. [2024-06-14 11:52:40,725 INFO L231 Difference]: Finished difference. Result has 126 places, 181 transitions, 1969 flow [2024-06-14 11:52:40,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1969, PETRI_PLACES=126, PETRI_TRANSITIONS=181} [2024-06-14 11:52:40,726 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 69 predicate places. [2024-06-14 11:52:40,726 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 181 transitions, 1969 flow [2024-06-14 11:52:40,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:40,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:40,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:40,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:52:40,727 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 11:52:40,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:40,727 INFO L85 PathProgramCache]: Analyzing trace with hash -516698646, now seen corresponding path program 4 times [2024-06-14 11:52:40,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:40,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355288106] [2024-06-14 11:52:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:40,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:41,896 INFO 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 11:52:41,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:41,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355288106] [2024-06-14 11:52:41,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355288106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:41,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:41,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:41,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425215180] [2024-06-14 11:52:41,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:41,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:41,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:41,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:41,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:42,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:42,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 181 transitions, 1969 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:42,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:42,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:42,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:44,629 INFO L124 PetriNetUnfolderBase]: 11492/16041 cut-off events. [2024-06-14 11:52:44,630 INFO L125 PetriNetUnfolderBase]: For 316095/316102 co-relation queries the response was YES. [2024-06-14 11:52:44,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92266 conditions, 16041 events. 11492/16041 cut-off events. For 316095/316102 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 90029 event pairs, 5062 based on Foata normal form. 7/16022 useless extension candidates. Maximal degree in co-relation 92215. Up to 14804 conditions per place. [2024-06-14 11:52:44,759 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 115 selfloop transitions, 115 changer transitions 0/237 dead transitions. [2024-06-14 11:52:44,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 237 transitions, 3011 flow [2024-06-14 11:52:44,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-14 11:52:44,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-06-14 11:52:44,760 INFO L175 Difference]: Start difference. First operand has 126 places, 181 transitions, 1969 flow. Second operand 8 states and 220 transitions. [2024-06-14 11:52:44,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 237 transitions, 3011 flow [2024-06-14 11:52:44,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 237 transitions, 2754 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 11:52:44,960 INFO L231 Difference]: Finished difference. Result has 128 places, 192 transitions, 2219 flow [2024-06-14 11:52:44,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2219, PETRI_PLACES=128, PETRI_TRANSITIONS=192} [2024-06-14 11:52:44,960 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 71 predicate places. [2024-06-14 11:52:44,960 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 192 transitions, 2219 flow [2024-06-14 11:52:44,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:44,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:44,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:44,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:52:44,961 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 11:52:44,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:44,961 INFO L85 PathProgramCache]: Analyzing trace with hash 654269878, now seen corresponding path program 5 times [2024-06-14 11:52:44,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:44,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303364504] [2024-06-14 11:52:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:44,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:46,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:46,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303364504] [2024-06-14 11:52:46,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303364504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:46,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:46,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:46,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417691858] [2024-06-14 11:52:46,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:46,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:46,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:46,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:46,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:46,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:46,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 192 transitions, 2219 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:46,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:46,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:46,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:48,672 INFO L124 PetriNetUnfolderBase]: 11535/16114 cut-off events. [2024-06-14 11:52:48,672 INFO L125 PetriNetUnfolderBase]: For 350040/350047 co-relation queries the response was YES. [2024-06-14 11:52:48,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95392 conditions, 16114 events. 11535/16114 cut-off events. For 350040/350047 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 90675 event pairs, 5062 based on Foata normal form. 7/16095 useless extension candidates. Maximal degree in co-relation 95340. Up to 14846 conditions per place. [2024-06-14 11:52:48,791 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 131 selfloop transitions, 106 changer transitions 0/244 dead transitions. [2024-06-14 11:52:48,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 244 transitions, 3266 flow [2024-06-14 11:52:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-14 11:52:48,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162037037037037 [2024-06-14 11:52:48,793 INFO L175 Difference]: Start difference. First operand has 128 places, 192 transitions, 2219 flow. Second operand 8 states and 223 transitions. [2024-06-14 11:52:48,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 244 transitions, 3266 flow [2024-06-14 11:52:49,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 244 transitions, 3138 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-14 11:52:49,024 INFO L231 Difference]: Finished difference. Result has 133 places, 197 transitions, 2410 flow [2024-06-14 11:52:49,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2410, PETRI_PLACES=133, PETRI_TRANSITIONS=197} [2024-06-14 11:52:49,025 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 76 predicate places. [2024-06-14 11:52:49,025 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 197 transitions, 2410 flow [2024-06-14 11:52:49,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:49,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:49,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:49,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:52:49,026 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 11:52:49,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:49,026 INFO L85 PathProgramCache]: Analyzing trace with hash -520488000, now seen corresponding path program 6 times [2024-06-14 11:52:49,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:49,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202846476] [2024-06-14 11:52:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:49,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:50,111 INFO 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 11:52:50,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:50,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202846476] [2024-06-14 11:52:50,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202846476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:50,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:50,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:50,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10113751] [2024-06-14 11:52:50,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:50,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:50,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:50,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:50,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:50,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:52:50,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 197 transitions, 2410 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:50,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:50,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:52:50,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:52,667 INFO L124 PetriNetUnfolderBase]: 11524/16100 cut-off events. [2024-06-14 11:52:52,668 INFO L125 PetriNetUnfolderBase]: For 351299/351306 co-relation queries the response was YES. [2024-06-14 11:52:52,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94476 conditions, 16100 events. 11524/16100 cut-off events. For 351299/351306 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 90598 event pairs, 5062 based on Foata normal form. 7/16081 useless extension candidates. Maximal degree in co-relation 94422. Up to 14839 conditions per place. [2024-06-14 11:52:52,820 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 131 selfloop transitions, 105 changer transitions 0/243 dead transitions. [2024-06-14 11:52:52,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 243 transitions, 3338 flow [2024-06-14 11:52:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-14 11:52:52,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-06-14 11:52:52,822 INFO L175 Difference]: Start difference. First operand has 133 places, 197 transitions, 2410 flow. Second operand 8 states and 221 transitions. [2024-06-14 11:52:52,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 243 transitions, 3338 flow [2024-06-14 11:52:53,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 243 transitions, 2863 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-06-14 11:52:53,145 INFO L231 Difference]: Finished difference. Result has 132 places, 197 transitions, 2158 flow [2024-06-14 11:52:53,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1935, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2158, PETRI_PLACES=132, PETRI_TRANSITIONS=197} [2024-06-14 11:52:53,145 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 75 predicate places. [2024-06-14 11:52:53,145 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 197 transitions, 2158 flow [2024-06-14 11:52:53,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:53,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:53,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:53,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:52:53,146 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 11:52:53,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:53,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1408146630, now seen corresponding path program 1 times [2024-06-14 11:52:53,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:53,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118164238] [2024-06-14 11:52:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:53,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:53,984 INFO 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 11:52:53,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:53,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118164238] [2024-06-14 11:52:53,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118164238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:53,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:53,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:52:53,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100463884] [2024-06-14 11:52:53,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:53,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:52:53,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:53,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:52:53,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:52:54,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:52:54,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 197 transitions, 2158 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:54,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:54,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:52:54,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:56,072 INFO L124 PetriNetUnfolderBase]: 9555/13953 cut-off events. [2024-06-14 11:52:56,072 INFO L125 PetriNetUnfolderBase]: For 313906/313923 co-relation queries the response was YES. [2024-06-14 11:52:56,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82042 conditions, 13953 events. 9555/13953 cut-off events. For 313906/313923 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 83237 event pairs, 4305 based on Foata normal form. 19/13949 useless extension candidates. Maximal degree in co-relation 81990. Up to 12885 conditions per place. [2024-06-14 11:52:56,186 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 187 selfloop transitions, 14 changer transitions 0/220 dead transitions. [2024-06-14 11:52:56,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 220 transitions, 2668 flow [2024-06-14 11:52:56,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:52:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:52:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 11:52:56,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845679012345679 [2024-06-14 11:52:56,187 INFO L175 Difference]: Start difference. First operand has 132 places, 197 transitions, 2158 flow. Second operand 6 states and 157 transitions. [2024-06-14 11:52:56,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 220 transitions, 2668 flow [2024-06-14 11:52:56,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 220 transitions, 2379 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 11:52:56,409 INFO L231 Difference]: Finished difference. Result has 130 places, 201 transitions, 1964 flow [2024-06-14 11:52:56,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1869, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1964, PETRI_PLACES=130, PETRI_TRANSITIONS=201} [2024-06-14 11:52:56,409 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 73 predicate places. [2024-06-14 11:52:56,410 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 201 transitions, 1964 flow [2024-06-14 11:52:56,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:56,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:56,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:56,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:52:56,410 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 11:52:56,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:56,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1914611891, now seen corresponding path program 1 times [2024-06-14 11:52:56,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:56,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564526416] [2024-06-14 11:52:56,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:56,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:57,686 INFO 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 11:52:57,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:57,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564526416] [2024-06-14 11:52:57,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564526416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:57,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:57,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:57,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53896392] [2024-06-14 11:52:57,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:57,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:57,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:57,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:57,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:57,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:52:57,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 201 transitions, 1964 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:57,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:57,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:52:57,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:00,005 INFO L124 PetriNetUnfolderBase]: 11080/15554 cut-off events. [2024-06-14 11:53:00,005 INFO L125 PetriNetUnfolderBase]: For 397212/397276 co-relation queries the response was YES. [2024-06-14 11:53:00,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94703 conditions, 15554 events. 11080/15554 cut-off events. For 397212/397276 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 88006 event pairs, 3689 based on Foata normal form. 22/15515 useless extension candidates. Maximal degree in co-relation 94652. Up to 14550 conditions per place. [2024-06-14 11:53:00,411 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 193 selfloop transitions, 43 changer transitions 0/264 dead transitions. [2024-06-14 11:53:00,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 264 transitions, 2878 flow [2024-06-14 11:53:00,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:53:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:53:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-14 11:53:00,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 11:53:00,413 INFO L175 Difference]: Start difference. First operand has 130 places, 201 transitions, 1964 flow. Second operand 9 states and 243 transitions. [2024-06-14 11:53:00,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 264 transitions, 2878 flow [2024-06-14 11:53:00,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 264 transitions, 2813 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 11:53:00,653 INFO L231 Difference]: Finished difference. Result has 135 places, 207 transitions, 2133 flow [2024-06-14 11:53:00,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2133, PETRI_PLACES=135, PETRI_TRANSITIONS=207} [2024-06-14 11:53:00,654 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 78 predicate places. [2024-06-14 11:53:00,654 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 207 transitions, 2133 flow [2024-06-14 11:53:00,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:00,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:00,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:00,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:53:00,654 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 11:53:00,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:00,655 INFO L85 PathProgramCache]: Analyzing trace with hash -510462053, now seen corresponding path program 2 times [2024-06-14 11:53:00,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:00,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515551399] [2024-06-14 11:53:00,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:00,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:01,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:01,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515551399] [2024-06-14 11:53:01,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515551399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:01,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:01,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:01,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327657129] [2024-06-14 11:53:01,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:01,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:01,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:01,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:01,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:02,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:53:02,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 207 transitions, 2133 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:02,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:02,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:53:02,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:04,296 INFO L124 PetriNetUnfolderBase]: 11065/15533 cut-off events. [2024-06-14 11:53:04,296 INFO L125 PetriNetUnfolderBase]: For 435822/435886 co-relation queries the response was YES. [2024-06-14 11:53:04,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97341 conditions, 15533 events. 11065/15533 cut-off events. For 435822/435886 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 87892 event pairs, 4403 based on Foata normal form. 22/15494 useless extension candidates. Maximal degree in co-relation 97289. Up to 14636 conditions per place. [2024-06-14 11:53:04,434 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 188 selfloop transitions, 37 changer transitions 0/253 dead transitions. [2024-06-14 11:53:04,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 253 transitions, 2735 flow [2024-06-14 11:53:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:04,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-14 11:53:04,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2024-06-14 11:53:04,436 INFO L175 Difference]: Start difference. First operand has 135 places, 207 transitions, 2133 flow. Second operand 8 states and 214 transitions. [2024-06-14 11:53:04,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 253 transitions, 2735 flow [2024-06-14 11:53:04,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 253 transitions, 2578 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 11:53:04,757 INFO L231 Difference]: Finished difference. Result has 138 places, 207 transitions, 2061 flow [2024-06-14 11:53:04,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1976, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2061, PETRI_PLACES=138, PETRI_TRANSITIONS=207} [2024-06-14 11:53:04,757 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 81 predicate places. [2024-06-14 11:53:04,757 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 207 transitions, 2061 flow [2024-06-14 11:53:04,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:04,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:04,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:04,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:53:04,758 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 11:53:04,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:04,758 INFO L85 PathProgramCache]: Analyzing trace with hash -392374373, now seen corresponding path program 3 times [2024-06-14 11:53:04,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:04,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75490202] [2024-06-14 11:53:04,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:04,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:05,848 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 11:53:05,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:05,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75490202] [2024-06-14 11:53:05,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75490202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:05,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:05,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:05,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009837685] [2024-06-14 11:53:05,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:05,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:05,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:05,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:05,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:05,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:53:05,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 207 transitions, 2061 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:05,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:05,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:53:05,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:08,314 INFO L124 PetriNetUnfolderBase]: 11101/15584 cut-off events. [2024-06-14 11:53:08,314 INFO L125 PetriNetUnfolderBase]: For 464612/464679 co-relation queries the response was YES. [2024-06-14 11:53:08,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98642 conditions, 15584 events. 11101/15584 cut-off events. For 464612/464679 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 88119 event pairs, 4416 based on Foata normal form. 20/15541 useless extension candidates. Maximal degree in co-relation 98588. Up to 14613 conditions per place. [2024-06-14 11:53:08,448 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 170 selfloop transitions, 53 changer transitions 0/251 dead transitions. [2024-06-14 11:53:08,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 251 transitions, 2707 flow [2024-06-14 11:53:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:08,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:08,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-14 11:53:08,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-14 11:53:08,450 INFO L175 Difference]: Start difference. First operand has 138 places, 207 transitions, 2061 flow. Second operand 8 states and 215 transitions. [2024-06-14 11:53:08,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 251 transitions, 2707 flow [2024-06-14 11:53:08,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 251 transitions, 2623 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:53:08,759 INFO L231 Difference]: Finished difference. Result has 139 places, 210 transitions, 2171 flow [2024-06-14 11:53:08,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1977, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2171, PETRI_PLACES=139, PETRI_TRANSITIONS=210} [2024-06-14 11:53:08,760 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 82 predicate places. [2024-06-14 11:53:08,760 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 210 transitions, 2171 flow [2024-06-14 11:53:08,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:08,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:08,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:08,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:53:08,761 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 11:53:08,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:08,761 INFO L85 PathProgramCache]: Analyzing trace with hash -392189675, now seen corresponding path program 1 times [2024-06-14 11:53:08,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:08,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838942480] [2024-06-14 11:53:08,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:08,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:09,838 INFO 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 11:53:09,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:09,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838942480] [2024-06-14 11:53:09,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838942480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:09,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:09,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:09,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973074086] [2024-06-14 11:53:09,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:09,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:09,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:09,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:09,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:09,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:53:09,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 210 transitions, 2171 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:09,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:09,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:53:09,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:12,691 INFO L124 PetriNetUnfolderBase]: 11689/16239 cut-off events. [2024-06-14 11:53:12,691 INFO L125 PetriNetUnfolderBase]: For 514116/514130 co-relation queries the response was YES. [2024-06-14 11:53:12,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105148 conditions, 16239 events. 11689/16239 cut-off events. For 514116/514130 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 90120 event pairs, 4664 based on Foata normal form. 22/16250 useless extension candidates. Maximal degree in co-relation 105093. Up to 15453 conditions per place. [2024-06-14 11:53:12,846 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 199 selfloop transitions, 58 changer transitions 0/264 dead transitions. [2024-06-14 11:53:12,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 264 transitions, 3221 flow [2024-06-14 11:53:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:12,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:12,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-14 11:53:12,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-06-14 11:53:12,848 INFO L175 Difference]: Start difference. First operand has 139 places, 210 transitions, 2171 flow. Second operand 8 states and 220 transitions. [2024-06-14 11:53:12,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 264 transitions, 3221 flow [2024-06-14 11:53:13,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 264 transitions, 3053 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:13,234 INFO L231 Difference]: Finished difference. Result has 141 places, 214 transitions, 2216 flow [2024-06-14 11:53:13,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2216, PETRI_PLACES=141, PETRI_TRANSITIONS=214} [2024-06-14 11:53:13,234 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 84 predicate places. [2024-06-14 11:53:13,234 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 214 transitions, 2216 flow [2024-06-14 11:53:13,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:13,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:13,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:13,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:53:13,235 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 11:53:13,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:13,235 INFO L85 PathProgramCache]: Analyzing trace with hash -167441979, now seen corresponding path program 1 times [2024-06-14 11:53:13,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:13,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904199184] [2024-06-14 11:53:13,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:13,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:14,122 INFO 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 11:53:14,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:14,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904199184] [2024-06-14 11:53:14,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904199184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:14,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:14,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:53:14,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160702904] [2024-06-14 11:53:14,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:14,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:53:14,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:14,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:53:14,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:53:14,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:53:14,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 214 transitions, 2216 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 11:53:14,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:14,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:53:14,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:16,584 INFO L124 PetriNetUnfolderBase]: 11081/15630 cut-off events. [2024-06-14 11:53:16,584 INFO L125 PetriNetUnfolderBase]: For 545705/545741 co-relation queries the response was YES. [2024-06-14 11:53:16,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105321 conditions, 15630 events. 11081/15630 cut-off events. For 545705/545741 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 89467 event pairs, 4663 based on Foata normal form. 27/15648 useless extension candidates. Maximal degree in co-relation 105265. Up to 14832 conditions per place. [2024-06-14 11:53:16,770 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 186 selfloop transitions, 41 changer transitions 0/246 dead transitions. [2024-06-14 11:53:16,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 246 transitions, 2951 flow [2024-06-14 11:53:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:53:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:53:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-14 11:53:16,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49691358024691357 [2024-06-14 11:53:16,771 INFO L175 Difference]: Start difference. First operand has 141 places, 214 transitions, 2216 flow. Second operand 6 states and 161 transitions. [2024-06-14 11:53:16,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 246 transitions, 2951 flow [2024-06-14 11:53:17,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 246 transitions, 2764 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:17,215 INFO L231 Difference]: Finished difference. Result has 141 places, 221 transitions, 2228 flow [2024-06-14 11:53:17,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2228, PETRI_PLACES=141, PETRI_TRANSITIONS=221} [2024-06-14 11:53:17,216 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 84 predicate places. [2024-06-14 11:53:17,216 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 221 transitions, 2228 flow [2024-06-14 11:53:17,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 11:53:17,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:17,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:17,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:53:17,217 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 11:53:17,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:17,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1044738377, now seen corresponding path program 4 times [2024-06-14 11:53:17,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:17,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620177220] [2024-06-14 11:53:17,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:17,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:18,307 INFO 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 11:53:18,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:18,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620177220] [2024-06-14 11:53:18,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620177220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:18,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:18,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:18,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202438600] [2024-06-14 11:53:18,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:18,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:18,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:18,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:18,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:53:18,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 221 transitions, 2228 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:18,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:18,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:53:18,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:21,548 INFO L124 PetriNetUnfolderBase]: 11202/15743 cut-off events. [2024-06-14 11:53:21,548 INFO L125 PetriNetUnfolderBase]: For 578704/578826 co-relation queries the response was YES. [2024-06-14 11:53:21,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105944 conditions, 15743 events. 11202/15743 cut-off events. For 578704/578826 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 89295 event pairs, 4378 based on Foata normal form. 12/15652 useless extension candidates. Maximal degree in co-relation 105887. Up to 14719 conditions per place. [2024-06-14 11:53:21,688 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 179 selfloop transitions, 53 changer transitions 0/263 dead transitions. [2024-06-14 11:53:21,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 263 transitions, 2896 flow [2024-06-14 11:53:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 11:53:21,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-14 11:53:21,689 INFO L175 Difference]: Start difference. First operand has 141 places, 221 transitions, 2228 flow. Second operand 8 states and 212 transitions. [2024-06-14 11:53:21,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 263 transitions, 2896 flow [2024-06-14 11:53:22,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 263 transitions, 2809 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 11:53:22,052 INFO L231 Difference]: Finished difference. Result has 146 places, 224 transitions, 2345 flow [2024-06-14 11:53:22,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2345, PETRI_PLACES=146, PETRI_TRANSITIONS=224} [2024-06-14 11:53:22,052 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 89 predicate places. [2024-06-14 11:53:22,052 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 224 transitions, 2345 flow [2024-06-14 11:53:22,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:22,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:22,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:22,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:53:22,053 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 11:53:22,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:22,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1044923075, now seen corresponding path program 2 times [2024-06-14 11:53:22,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:22,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511616131] [2024-06-14 11:53:22,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:22,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:23,272 INFO 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 11:53:23,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:23,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511616131] [2024-06-14 11:53:23,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511616131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:23,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:23,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:23,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909371113] [2024-06-14 11:53:23,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:23,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:23,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:23,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:23,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:23,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:53:23,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 224 transitions, 2345 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:23,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:23,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:53:23,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:26,156 INFO L124 PetriNetUnfolderBase]: 11777/16371 cut-off events. [2024-06-14 11:53:26,156 INFO L125 PetriNetUnfolderBase]: For 631882/631908 co-relation queries the response was YES. [2024-06-14 11:53:26,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112582 conditions, 16371 events. 11777/16371 cut-off events. For 631882/631908 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 90891 event pairs, 4651 based on Foata normal form. 28/16390 useless extension candidates. Maximal degree in co-relation 112524. Up to 15566 conditions per place. [2024-06-14 11:53:26,404 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 208 selfloop transitions, 61 changer transitions 0/276 dead transitions. [2024-06-14 11:53:26,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 276 transitions, 3461 flow [2024-06-14 11:53:26,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:26,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:26,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-14 11:53:26,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 11:53:26,406 INFO L175 Difference]: Start difference. First operand has 146 places, 224 transitions, 2345 flow. Second operand 8 states and 216 transitions. [2024-06-14 11:53:26,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 276 transitions, 3461 flow [2024-06-14 11:53:26,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 276 transitions, 3283 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:26,755 INFO L231 Difference]: Finished difference. Result has 148 places, 228 transitions, 2398 flow [2024-06-14 11:53:26,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2167, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2398, PETRI_PLACES=148, PETRI_TRANSITIONS=228} [2024-06-14 11:53:26,756 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 91 predicate places. [2024-06-14 11:53:26,756 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 228 transitions, 2398 flow [2024-06-14 11:53:26,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:26,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:26,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:26,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:53:26,757 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 11:53:26,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:26,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1151288263, now seen corresponding path program 3 times [2024-06-14 11:53:26,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:26,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122450694] [2024-06-14 11:53:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:26,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:27,969 INFO 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 11:53:27,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:27,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122450694] [2024-06-14 11:53:27,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122450694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:27,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:27,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:27,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742799963] [2024-06-14 11:53:27,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:27,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:27,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:27,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:27,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:28,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:53:28,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 228 transitions, 2398 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:28,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:28,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:53:28,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:30,999 INFO L124 PetriNetUnfolderBase]: 11848/16472 cut-off events. [2024-06-14 11:53:31,000 INFO L125 PetriNetUnfolderBase]: For 680530/680556 co-relation queries the response was YES. [2024-06-14 11:53:31,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116659 conditions, 16472 events. 11848/16472 cut-off events. For 680530/680556 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 91441 event pairs, 4659 based on Foata normal form. 28/16491 useless extension candidates. Maximal degree in co-relation 116600. Up to 15667 conditions per place. [2024-06-14 11:53:31,160 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 205 selfloop transitions, 66 changer transitions 0/278 dead transitions. [2024-06-14 11:53:31,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 278 transitions, 3418 flow [2024-06-14 11:53:31,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-14 11:53:31,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2024-06-14 11:53:31,162 INFO L175 Difference]: Start difference. First operand has 148 places, 228 transitions, 2398 flow. Second operand 8 states and 214 transitions. [2024-06-14 11:53:31,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 278 transitions, 3418 flow [2024-06-14 11:53:31,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 278 transitions, 3219 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:31,692 INFO L231 Difference]: Finished difference. Result has 150 places, 232 transitions, 2448 flow [2024-06-14 11:53:31,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2199, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2448, PETRI_PLACES=150, PETRI_TRANSITIONS=232} [2024-06-14 11:53:31,692 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 93 predicate places. [2024-06-14 11:53:31,693 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 232 transitions, 2448 flow [2024-06-14 11:53:31,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:31,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:31,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:31,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:53:31,693 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 11:53:31,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:31,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1159859143, now seen corresponding path program 4 times [2024-06-14 11:53:31,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:31,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591710818] [2024-06-14 11:53:31,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:31,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:32,926 INFO 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 11:53:32,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:32,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591710818] [2024-06-14 11:53:32,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591710818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:32,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:32,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:32,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151401634] [2024-06-14 11:53:32,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:32,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:32,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:32,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:32,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:33,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 11:53:33,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 232 transitions, 2448 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:33,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:33,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 11:53:33,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:35,737 INFO L124 PetriNetUnfolderBase]: 11868/16500 cut-off events. [2024-06-14 11:53:35,737 INFO L125 PetriNetUnfolderBase]: For 723117/723143 co-relation queries the response was YES. [2024-06-14 11:53:35,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119650 conditions, 16500 events. 11868/16500 cut-off events. For 723117/723143 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 91754 event pairs, 4362 based on Foata normal form. 28/16519 useless extension candidates. Maximal degree in co-relation 119590. Up to 15472 conditions per place. [2024-06-14 11:53:36,062 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 195 selfloop transitions, 81 changer transitions 0/283 dead transitions. [2024-06-14 11:53:36,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 283 transitions, 3496 flow [2024-06-14 11:53:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-14 11:53:36,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-14 11:53:36,064 INFO L175 Difference]: Start difference. First operand has 150 places, 232 transitions, 2448 flow. Second operand 8 states and 215 transitions. [2024-06-14 11:53:36,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 283 transitions, 3496 flow [2024-06-14 11:53:36,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 283 transitions, 3279 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:36,459 INFO L231 Difference]: Finished difference. Result has 152 places, 236 transitions, 2518 flow [2024-06-14 11:53:36,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2231, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2518, PETRI_PLACES=152, PETRI_TRANSITIONS=236} [2024-06-14 11:53:36,459 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 95 predicate places. [2024-06-14 11:53:36,459 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 236 transitions, 2518 flow [2024-06-14 11:53:36,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:36,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:36,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:36,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:53:36,460 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 11:53:36,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:36,460 INFO L85 PathProgramCache]: Analyzing trace with hash 702860391, now seen corresponding path program 2 times [2024-06-14 11:53:36,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:36,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994532637] [2024-06-14 11:53:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:36,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:37,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:37,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994532637] [2024-06-14 11:53:37,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994532637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:37,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:37,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:53:37,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468796557] [2024-06-14 11:53:37,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:37,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:53:37,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:37,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:53:37,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:53:37,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:53:37,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 236 transitions, 2518 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 11:53:37,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:37,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:53:37,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:40,303 INFO L124 PetriNetUnfolderBase]: 11179/15776 cut-off events. [2024-06-14 11:53:40,303 INFO L125 PetriNetUnfolderBase]: For 754737/754752 co-relation queries the response was YES. [2024-06-14 11:53:40,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117137 conditions, 15776 events. 11179/15776 cut-off events. For 754737/754752 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 90440 event pairs, 4675 based on Foata normal form. 14/15766 useless extension candidates. Maximal degree in co-relation 117076. Up to 14961 conditions per place. [2024-06-14 11:53:40,450 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 191 selfloop transitions, 41 changer transitions 0/254 dead transitions. [2024-06-14 11:53:40,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 254 transitions, 3038 flow [2024-06-14 11:53:40,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:53:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:53:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 11:53:40,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 11:53:40,451 INFO L175 Difference]: Start difference. First operand has 152 places, 236 transitions, 2518 flow. Second operand 6 states and 153 transitions. [2024-06-14 11:53:40,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 254 transitions, 3038 flow [2024-06-14 11:53:40,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 254 transitions, 2753 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:40,933 INFO L231 Difference]: Finished difference. Result has 152 places, 236 transitions, 2327 flow [2024-06-14 11:53:40,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2327, PETRI_PLACES=152, PETRI_TRANSITIONS=236} [2024-06-14 11:53:40,934 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 95 predicate places. [2024-06-14 11:53:40,934 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 236 transitions, 2327 flow [2024-06-14 11:53:40,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 11:53:40,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:40,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:40,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:53:40,935 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:53:40,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:40,936 INFO L85 PathProgramCache]: Analyzing trace with hash -161722107, now seen corresponding path program 1 times [2024-06-14 11:53:40,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:40,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847163762] [2024-06-14 11:53:40,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:40,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat