./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix013.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/mix013.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/mix013.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix013.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 11:59:48,730 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:59:48,804 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:59:48,807 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:59:48,807 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:59:48,821 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:59:48,821 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:59:48,822 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:59:48,822 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:59:48,823 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:59:48,823 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:59:48,824 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:59:48,825 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:59:48,826 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:59:48,826 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:59:48,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:59:48,827 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:59:48,827 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:59:48,828 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:59:48,828 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:59:48,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:59:48,830 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:59:48,830 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:59:48,830 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:59:48,831 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:59:48,831 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:59:48,831 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:59:48,832 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:59:48,832 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:59:48,832 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:59:48,832 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:59:48,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:59:48,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:59:48,833 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:59:48,833 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:59:48,833 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:59:48,833 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:59:48,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:59:48,833 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:59:48,833 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:59:48,833 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:59:48,834 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:59:48,834 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:59:48,834 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:59:49,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:59:49,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:59:49,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:59:49,088 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:59:49,088 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:59:49,089 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix013.opt.i [2024-06-14 11:59:50,097 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:59:50,251 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:59:50,252 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix013.opt.i [2024-06-14 11:59:50,263 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb0f15380/52ed4a4ddd9c471cb423df95e64fe772/FLAGaf2696c13 [2024-06-14 11:59:50,274 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb0f15380/52ed4a4ddd9c471cb423df95e64fe772 [2024-06-14 11:59:50,276 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:59:50,277 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:59:50,278 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix013.opt.yml/witness.yml [2024-06-14 11:59:50,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:59:50,461 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:59:50,462 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:59:50,462 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:59:50,466 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:59:50,466 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:59:50" (1/2) ... [2024-06-14 11:59:50,467 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46cff22e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:50, skipping insertion in model container [2024-06-14 11:59:50,467 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:59:50" (1/2) ... [2024-06-14 11:59:50,468 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@563c90e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:59:50, skipping insertion in model container [2024-06-14 11:59:50,468 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:59:50" (2/2) ... [2024-06-14 11:59:50,468 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46cff22e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:59:50, skipping insertion in model container [2024-06-14 11:59:50,468 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:59:50" (2/2) ... [2024-06-14 11:59:50,468 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:59:50,590 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:59:50,591 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-14 11:59:50,591 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-14 11:59:50,592 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-14 11:59:50,592 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-14 11:59:50,592 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:59:50,593 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-14 11:59:50,632 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:59:50,952 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:59:50,964 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 11:59:51,073 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:59:51,102 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:59:51,103 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:59:51 WrapperNode [2024-06-14 11:59:51,103 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:59:51,104 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:59:51,104 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:59:51,104 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:59:51,110 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 11:59:51" (1/1) ... [2024-06-14 11:59:51,140 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 11:59:51" (1/1) ... [2024-06-14 11:59:51,181 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 163 [2024-06-14 11:59:51,182 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:59:51,183 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:59:51,183 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:59:51,183 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:59:51,200 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 11:59:51" (1/1) ... [2024-06-14 11:59:51,200 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 11:59:51" (1/1) ... [2024-06-14 11:59:51,211 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 11:59:51" (1/1) ... [2024-06-14 11:59:51,231 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 11:59:51,237 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 11:59:51" (1/1) ... [2024-06-14 11:59:51,238 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 11:59:51" (1/1) ... [2024-06-14 11:59:51,249 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 11:59:51" (1/1) ... [2024-06-14 11:59:51,258 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 11:59:51" (1/1) ... [2024-06-14 11:59:51,260 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 11:59:51" (1/1) ... [2024-06-14 11:59:51,267 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 11:59:51" (1/1) ... [2024-06-14 11:59:51,271 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:59:51,274 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:59:51,274 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:59:51,275 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:59:51,275 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 11:59:51" (1/1) ... [2024-06-14 11:59:51,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:59:51,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:59:51,300 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 11:59:51,324 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 11:59:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:59:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:59:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:59:51,338 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:59:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:59:51,338 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:59:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:59:51,338 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:59:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 11:59:51,339 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 11:59:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:59:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:59:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:59:51,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:59:51,341 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 11:59:51,464 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:59:51,466 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:59:51,875 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:59:51,876 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:59:52,081 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:59:52,082 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:59:52,082 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:59:52 BoogieIcfgContainer [2024-06-14 11:59:52,082 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:59:52,084 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:59:52,084 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:59:52,087 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:59:52,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:59:50" (1/4) ... [2024-06-14 11:59:52,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480d2773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:59:52, skipping insertion in model container [2024-06-14 11:59:52,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:59:50" (2/4) ... [2024-06-14 11:59:52,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480d2773 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:59:52, skipping insertion in model container [2024-06-14 11:59:52,100 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 11:59:51" (3/4) ... [2024-06-14 11:59:52,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480d2773 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:59:52, skipping insertion in model container [2024-06-14 11:59:52,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:59:52" (4/4) ... [2024-06-14 11:59:52,105 INFO L112 eAbstractionObserver]: Analyzing ICFG mix013.opt.i [2024-06-14 11:59:52,118 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:59:52,118 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 11:59:52,118 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:59:52,162 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:59:52,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 11:59:52,225 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-14 11:59:52,225 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:59:52,228 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 5. Compared 95 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 11:59:52,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 11:59:52,231 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-14 11:59:52,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:59:52,247 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;@1e72f093, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:59:52,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 11:59:52,251 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:59:52,251 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:59:52,251 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:59:52,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:52,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:59:52,252 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 11:59:52,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:52,256 INFO L85 PathProgramCache]: Analyzing trace with hash 28587988, now seen corresponding path program 1 times [2024-06-14 11:59:52,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:52,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565798580] [2024-06-14 11:59:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:52,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:53,311 INFO 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 11:59:53,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:53,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565798580] [2024-06-14 11:59:53,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565798580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:53,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:53,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:59:53,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535752131] [2024-06-14 11:59:53,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:53,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:59:53,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:53,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:59:53,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:59:53,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 54 [2024-06-14 11:59:53,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:53,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:53,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 54 [2024-06-14 11:59:53,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:54,248 INFO L124 PetriNetUnfolderBase]: 4867/7024 cut-off events. [2024-06-14 11:59:54,249 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2024-06-14 11:59:54,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13938 conditions, 7024 events. 4867/7024 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 40777 event pairs, 3534 based on Foata normal form. 1/6764 useless extension candidates. Maximal degree in co-relation 13922. Up to 6693 conditions per place. [2024-06-14 11:59:54,292 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 42 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-14 11:59:54,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 231 flow [2024-06-14 11:59:54,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:59:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:59:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-06-14 11:59:54,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-14 11:59:54,304 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 105 transitions. [2024-06-14 11:59:54,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 231 flow [2024-06-14 11:59:54,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:59:54,312 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-14 11:59:54,313 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 11:59:54,316 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-14 11:59:54,317 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-14 11:59:54,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:54,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:54,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:54,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:59:54,318 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 11:59:54,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:54,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1703311795, now seen corresponding path program 1 times [2024-06-14 11:59:54,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:54,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757509100] [2024-06-14 11:59:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:54,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:55,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:55,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757509100] [2024-06-14 11:59:55,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757509100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:55,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:55,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:59:55,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214133758] [2024-06-14 11:59:55,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:55,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:59:55,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:55,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:59:55,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:59:55,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-06-14 11:59:55,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:55,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:55,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-06-14 11:59:55,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:56,066 INFO L124 PetriNetUnfolderBase]: 5569/7832 cut-off events. [2024-06-14 11:59:56,066 INFO L125 PetriNetUnfolderBase]: For 1726/1726 co-relation queries the response was YES. [2024-06-14 11:59:56,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18021 conditions, 7832 events. 5569/7832 cut-off events. For 1726/1726 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 44169 event pairs, 3437 based on Foata normal form. 4/7766 useless extension candidates. Maximal degree in co-relation 18006. Up to 7610 conditions per place. [2024-06-14 11:59:56,111 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 53 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-14 11:59:56,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 325 flow [2024-06-14 11:59:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:59:56,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:59:56,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-14 11:59:56,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6203703703703703 [2024-06-14 11:59:56,113 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 134 transitions. [2024-06-14 11:59:56,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 325 flow [2024-06-14 11:59:56,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:59:56,115 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-14 11:59:56,116 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 11:59:56,116 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-14 11:59:56,116 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-14 11:59:56,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:56,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:56,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:56,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:59:56,117 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 11:59:56,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:56,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1675021728, now seen corresponding path program 1 times [2024-06-14 11:59:56,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:56,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017350915] [2024-06-14 11:59:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:56,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:57,110 INFO 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 11:59:57,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:57,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017350915] [2024-06-14 11:59:57,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017350915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:57,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:57,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:59:57,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481574663] [2024-06-14 11:59:57,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:57,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:59:57,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:57,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:59:57,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:59:57,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-14 11:59:57,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:57,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:57,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-14 11:59:57,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:58,336 INFO L124 PetriNetUnfolderBase]: 7070/9869 cut-off events. [2024-06-14 11:59:58,337 INFO L125 PetriNetUnfolderBase]: For 5896/5896 co-relation queries the response was YES. [2024-06-14 11:59:58,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25305 conditions, 9869 events. 7070/9869 cut-off events. For 5896/5896 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 55514 event pairs, 3323 based on Foata normal form. 8/9787 useless extension candidates. Maximal degree in co-relation 25288. Up to 9556 conditions per place. [2024-06-14 11:59:58,390 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 71 selfloop transitions, 16 changer transitions 0/96 dead transitions. [2024-06-14 11:59:58,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 490 flow [2024-06-14 11:59:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:59:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:59:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-14 11:59:58,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5771604938271605 [2024-06-14 11:59:58,408 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 6 states and 187 transitions. [2024-06-14 11:59:58,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 490 flow [2024-06-14 11:59:58,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 96 transitions, 462 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 11:59:58,411 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 245 flow [2024-06-14 11:59:58,412 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 11:59:58,412 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2024-06-14 11:59:58,412 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 245 flow [2024-06-14 11:59:58,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:58,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:58,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:58,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:59:58,413 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 11:59:58,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:58,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1326274383, now seen corresponding path program 1 times [2024-06-14 11:59:58,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:58,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349832219] [2024-06-14 11:59:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:58,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:59,199 INFO 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 11:59:59,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:59,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349832219] [2024-06-14 11:59:59,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349832219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:59,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:59,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:59:59,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943216930] [2024-06-14 11:59:59,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:59,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:59:59,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:59,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:59:59,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:59:59,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:59:59,270 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 11:59:59,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:59,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:59:59,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:00,500 INFO L124 PetriNetUnfolderBase]: 7847/11146 cut-off events. [2024-06-14 12:00:00,501 INFO L125 PetriNetUnfolderBase]: For 11423/11423 co-relation queries the response was YES. [2024-06-14 12:00:00,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30947 conditions, 11146 events. 7847/11146 cut-off events. For 11423/11423 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 63687 event pairs, 4266 based on Foata normal form. 3/10964 useless extension candidates. Maximal degree in co-relation 30928. Up to 10669 conditions per place. [2024-06-14 12:00:00,558 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 60 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-14 12:00:00,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 79 transitions, 451 flow [2024-06-14 12:00:00,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:00:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:00:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 12:00:00,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074074074074074 [2024-06-14 12:00:00,561 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 245 flow. Second operand 5 states and 137 transitions. [2024-06-14 12:00:00,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 79 transitions, 451 flow [2024-06-14 12:00:00,566 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 12:00:00,567 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 268 flow [2024-06-14 12:00:00,568 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 12:00:00,569 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2024-06-14 12:00:00,569 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 268 flow [2024-06-14 12:00:00,569 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 12:00:00,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:00,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:00,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:00:00,570 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:00,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:00,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1809247243, now seen corresponding path program 1 times [2024-06-14 12:00:00,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:00,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937309683] [2024-06-14 12:00:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:00,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:01,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:01,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937309683] [2024-06-14 12:00:01,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937309683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:01,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:01,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:00:01,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420638834] [2024-06-14 12:00:01,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:01,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:00:01,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:01,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:00:01,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:00:01,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:00:01,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 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 12:00:01,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:01,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:00:01,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:03,008 INFO L124 PetriNetUnfolderBase]: 7838/11177 cut-off events. [2024-06-14 12:00:03,008 INFO L125 PetriNetUnfolderBase]: For 17344/17344 co-relation queries the response was YES. [2024-06-14 12:00:03,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33718 conditions, 11177 events. 7838/11177 cut-off events. For 17344/17344 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 64251 event pairs, 4142 based on Foata normal form. 3/11036 useless extension candidates. Maximal degree in co-relation 33697. Up to 10642 conditions per place. [2024-06-14 12:00:03,094 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 67 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-14 12:00:03,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 90 transitions, 520 flow [2024-06-14 12:00:03,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:00:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:00:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-14 12:00:03,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030864197530864 [2024-06-14 12:00:03,096 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 268 flow. Second operand 6 states and 163 transitions. [2024-06-14 12:00:03,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 90 transitions, 520 flow [2024-06-14 12:00:03,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 90 transitions, 491 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:00:03,100 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 314 flow [2024-06-14 12:00:03,101 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=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-14 12:00:03,101 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2024-06-14 12:00:03,101 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 314 flow [2024-06-14 12:00:03,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 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 12:00:03,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:03,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:03,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:00:03,102 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:03,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:03,102 INFO L85 PathProgramCache]: Analyzing trace with hash -583180566, now seen corresponding path program 1 times [2024-06-14 12:00:03,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:03,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039678503] [2024-06-14 12:00:03,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:03,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:04,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:04,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039678503] [2024-06-14 12:00:04,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039678503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:04,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:04,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:00:04,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205983664] [2024-06-14 12:00:04,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:04,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:00:04,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:04,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:00:04,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:00:04,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:04,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 314 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 12:00:04,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:04,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:04,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:05,617 INFO L124 PetriNetUnfolderBase]: 9010/12479 cut-off events. [2024-06-14 12:00:05,617 INFO L125 PetriNetUnfolderBase]: For 30042/30074 co-relation queries the response was YES. [2024-06-14 12:00:05,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41236 conditions, 12479 events. 9010/12479 cut-off events. For 30042/30074 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 68939 event pairs, 4675 based on Foata normal form. 11/12470 useless extension candidates. Maximal degree in co-relation 41214. Up to 12158 conditions per place. [2024-06-14 12:00:05,826 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 75 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2024-06-14 12:00:05,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 104 transitions, 676 flow [2024-06-14 12:00:05,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:00:05,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:00:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-14 12:00:05,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2024-06-14 12:00:05,828 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 314 flow. Second operand 6 states and 166 transitions. [2024-06-14 12:00:05,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 104 transitions, 676 flow [2024-06-14 12:00:05,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 104 transitions, 633 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:00:05,833 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 396 flow [2024-06-14 12:00:05,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=396, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2024-06-14 12:00:05,834 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-14 12:00:05,835 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 396 flow [2024-06-14 12:00:05,835 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 12:00:05,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:05,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:05,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:00:05,835 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:05,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:05,836 INFO L85 PathProgramCache]: Analyzing trace with hash -225284016, now seen corresponding path program 2 times [2024-06-14 12:00:05,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:05,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964226801] [2024-06-14 12:00:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:05,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:06,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:06,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964226801] [2024-06-14 12:00:06,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964226801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:06,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:06,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:00:06,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133477457] [2024-06-14 12:00:06,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:06,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:00:06,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:06,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:00:06,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:00:06,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:06,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 396 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 12:00:06,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:06,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:06,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:08,556 INFO L124 PetriNetUnfolderBase]: 9001/12468 cut-off events. [2024-06-14 12:00:08,557 INFO L125 PetriNetUnfolderBase]: For 41191/41221 co-relation queries the response was YES. [2024-06-14 12:00:08,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44373 conditions, 12468 events. 9001/12468 cut-off events. For 41191/41221 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 68671 event pairs, 4678 based on Foata normal form. 9/12457 useless extension candidates. Maximal degree in co-relation 44350. Up to 12149 conditions per place. [2024-06-14 12:00:08,655 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 69 selfloop transitions, 21 changer transitions 0/98 dead transitions. [2024-06-14 12:00:08,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 638 flow [2024-06-14 12:00:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:00:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:00:08,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 12:00:08,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-06-14 12:00:08,658 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 396 flow. Second operand 6 states and 160 transitions. [2024-06-14 12:00:08,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 638 flow [2024-06-14 12:00:08,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 584 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-14 12:00:08,678 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 395 flow [2024-06-14 12:00:08,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=395, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-14 12:00:08,680 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2024-06-14 12:00:08,680 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 395 flow [2024-06-14 12:00:08,681 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 12:00:08,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:08,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:08,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:00:08,681 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:08,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:08,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2065950328, now seen corresponding path program 1 times [2024-06-14 12:00:08,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:08,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982393641] [2024-06-14 12:00:08,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:08,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:09,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:09,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982393641] [2024-06-14 12:00:09,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982393641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:09,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:09,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:09,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570576507] [2024-06-14 12:00:09,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:09,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:09,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:09,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:09,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:09,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:09,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 395 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 12:00:09,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:09,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:09,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:11,517 INFO L124 PetriNetUnfolderBase]: 9092/12606 cut-off events. [2024-06-14 12:00:11,518 INFO L125 PetriNetUnfolderBase]: For 46645/46673 co-relation queries the response was YES. [2024-06-14 12:00:11,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45313 conditions, 12606 events. 9092/12606 cut-off events. For 46645/46673 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69385 event pairs, 4668 based on Foata normal form. 7/12593 useless extension candidates. Maximal degree in co-relation 45288. Up to 12251 conditions per place. [2024-06-14 12:00:11,628 INFO L140 encePairwiseOnDemand]: 39/54 looper letters, 93 selfloop transitions, 32 changer transitions 0/133 dead transitions. [2024-06-14 12:00:11,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 133 transitions, 870 flow [2024-06-14 12:00:11,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:11,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-14 12:00:11,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-14 12:00:11,634 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 395 flow. Second operand 8 states and 215 transitions. [2024-06-14 12:00:11,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 133 transitions, 870 flow [2024-06-14 12:00:11,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 133 transitions, 796 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:11,658 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 551 flow [2024-06-14 12:00:11,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=551, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2024-06-14 12:00:11,661 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 21 predicate places. [2024-06-14 12:00:11,662 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 551 flow [2024-06-14 12:00:11,662 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 12:00:11,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:11,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:11,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:00:11,663 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:11,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:11,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1460268920, now seen corresponding path program 2 times [2024-06-14 12:00:11,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:11,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455208612] [2024-06-14 12:00:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:11,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:12,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:12,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455208612] [2024-06-14 12:00:12,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455208612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:12,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:12,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:12,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103911015] [2024-06-14 12:00:12,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:12,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:12,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:12,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:12,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:12,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:12,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 551 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 12:00:12,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:12,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:12,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:14,361 INFO L124 PetriNetUnfolderBase]: 9114/12643 cut-off events. [2024-06-14 12:00:14,362 INFO L125 PetriNetUnfolderBase]: For 60568/60600 co-relation queries the response was YES. [2024-06-14 12:00:14,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48901 conditions, 12643 events. 9114/12643 cut-off events. For 60568/60600 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69554 event pairs, 4526 based on Foata normal form. 11/12633 useless extension candidates. Maximal degree in co-relation 48874. Up to 12258 conditions per place. [2024-06-14 12:00:14,452 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 93 selfloop transitions, 34 changer transitions 0/135 dead transitions. [2024-06-14 12:00:14,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 135 transitions, 979 flow [2024-06-14 12:00:14,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:00:14,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:00:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 12:00:14,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:00:14,455 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 551 flow. Second operand 7 states and 189 transitions. [2024-06-14 12:00:14,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 135 transitions, 979 flow [2024-06-14 12:00:14,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 135 transitions, 917 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 12:00:14,477 INFO L231 Difference]: Finished difference. Result has 82 places, 97 transitions, 628 flow [2024-06-14 12:00:14,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=628, PETRI_PLACES=82, PETRI_TRANSITIONS=97} [2024-06-14 12:00:14,477 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-06-14 12:00:14,478 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 97 transitions, 628 flow [2024-06-14 12:00:14,478 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 12:00:14,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:14,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:14,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:00:14,478 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:14,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:14,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1878891712, now seen corresponding path program 1 times [2024-06-14 12:00:14,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:14,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076263949] [2024-06-14 12:00:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:14,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:15,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:15,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076263949] [2024-06-14 12:00:15,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076263949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:15,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:15,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:15,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218648391] [2024-06-14 12:00:15,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:15,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:15,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:15,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:15,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:15,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:15,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 97 transitions, 628 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 12:00:15,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:15,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:15,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:17,418 INFO L124 PetriNetUnfolderBase]: 9136/12666 cut-off events. [2024-06-14 12:00:17,418 INFO L125 PetriNetUnfolderBase]: For 77010/77044 co-relation queries the response was YES. [2024-06-14 12:00:17,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52253 conditions, 12666 events. 9136/12666 cut-off events. For 77010/77044 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69782 event pairs, 4398 based on Foata normal form. 17/12662 useless extension candidates. Maximal degree in co-relation 52225. Up to 12263 conditions per place. [2024-06-14 12:00:17,491 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 101 selfloop transitions, 35 changer transitions 0/144 dead transitions. [2024-06-14 12:00:17,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 144 transitions, 1170 flow [2024-06-14 12:00:17,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:00:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:00:17,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-14 12:00:17,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105820105820106 [2024-06-14 12:00:17,492 INFO L175 Difference]: Start difference. First operand has 82 places, 97 transitions, 628 flow. Second operand 7 states and 193 transitions. [2024-06-14 12:00:17,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 144 transitions, 1170 flow [2024-06-14 12:00:17,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 144 transitions, 1055 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:00:17,516 INFO L231 Difference]: Finished difference. Result has 84 places, 105 transitions, 696 flow [2024-06-14 12:00:17,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=84, PETRI_TRANSITIONS=105} [2024-06-14 12:00:17,517 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 27 predicate places. [2024-06-14 12:00:17,517 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 105 transitions, 696 flow [2024-06-14 12:00:17,519 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 12:00:17,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:17,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:17,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:00:17,519 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:17,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:17,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1460273570, now seen corresponding path program 3 times [2024-06-14 12:00:17,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:17,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028453199] [2024-06-14 12:00:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:17,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:18,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:18,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028453199] [2024-06-14 12:00:18,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028453199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:18,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:18,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:18,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036051090] [2024-06-14 12:00:18,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:18,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:18,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:18,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:18,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:18,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:18,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 105 transitions, 696 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 12:00:18,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:18,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:18,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:20,237 INFO L124 PetriNetUnfolderBase]: 9158/12777 cut-off events. [2024-06-14 12:00:20,237 INFO L125 PetriNetUnfolderBase]: For 77348/77380 co-relation queries the response was YES. [2024-06-14 12:00:20,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52442 conditions, 12777 events. 9158/12777 cut-off events. For 77348/77380 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 71654 event pairs, 4397 based on Foata normal form. 7/12769 useless extension candidates. Maximal degree in co-relation 52413. Up to 12232 conditions per place. [2024-06-14 12:00:20,312 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 91 selfloop transitions, 50 changer transitions 0/149 dead transitions. [2024-06-14 12:00:20,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 149 transitions, 1242 flow [2024-06-14 12:00:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:00:20,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:00:20,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-14 12:00:20,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105820105820106 [2024-06-14 12:00:20,313 INFO L175 Difference]: Start difference. First operand has 84 places, 105 transitions, 696 flow. Second operand 7 states and 193 transitions. [2024-06-14 12:00:20,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 149 transitions, 1242 flow [2024-06-14 12:00:20,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 149 transitions, 1191 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 12:00:20,345 INFO L231 Difference]: Finished difference. Result has 88 places, 113 transitions, 864 flow [2024-06-14 12:00:20,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=864, PETRI_PLACES=88, PETRI_TRANSITIONS=113} [2024-06-14 12:00:20,346 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2024-06-14 12:00:20,346 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 113 transitions, 864 flow [2024-06-14 12:00:20,346 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 12:00:20,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:20,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:20,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:00:20,346 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:20,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:20,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1606368920, now seen corresponding path program 2 times [2024-06-14 12:00:20,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:20,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753228316] [2024-06-14 12:00:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:20,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:21,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:21,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753228316] [2024-06-14 12:00:21,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753228316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:21,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:21,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:21,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843041878] [2024-06-14 12:00:21,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:21,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:21,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:21,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:21,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:21,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:21,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 113 transitions, 864 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 12:00:21,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:21,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:21,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:23,321 INFO L124 PetriNetUnfolderBase]: 9180/12827 cut-off events. [2024-06-14 12:00:23,322 INFO L125 PetriNetUnfolderBase]: For 96982/97028 co-relation queries the response was YES. [2024-06-14 12:00:23,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55980 conditions, 12827 events. 9180/12827 cut-off events. For 96982/97028 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 72124 event pairs, 4391 based on Foata normal form. 33/12842 useless extension candidates. Maximal degree in co-relation 55949. Up to 12316 conditions per place. [2024-06-14 12:00:23,428 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 106 selfloop transitions, 40 changer transitions 0/154 dead transitions. [2024-06-14 12:00:23,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 154 transitions, 1386 flow [2024-06-14 12:00:23,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:00:23,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:00:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 12:00:23,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:00:23,429 INFO L175 Difference]: Start difference. First operand has 88 places, 113 transitions, 864 flow. Second operand 7 states and 189 transitions. [2024-06-14 12:00:23,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 154 transitions, 1386 flow [2024-06-14 12:00:23,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 154 transitions, 1317 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 12:00:23,481 INFO L231 Difference]: Finished difference. Result has 92 places, 117 transitions, 934 flow [2024-06-14 12:00:23,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=934, PETRI_PLACES=92, PETRI_TRANSITIONS=117} [2024-06-14 12:00:23,481 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 35 predicate places. [2024-06-14 12:00:23,481 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 117 transitions, 934 flow [2024-06-14 12:00:23,482 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 12:00:23,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:23,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:23,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:00:23,482 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:23,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:23,483 INFO L85 PathProgramCache]: Analyzing trace with hash 774962870, now seen corresponding path program 3 times [2024-06-14 12:00:23,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:23,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189133853] [2024-06-14 12:00:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:23,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:24,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:24,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189133853] [2024-06-14 12:00:24,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189133853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:24,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:24,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:24,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109778366] [2024-06-14 12:00:24,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:24,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:24,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:24,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:24,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:24,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:24,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 117 transitions, 934 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 12:00:24,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:24,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:24,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:26,551 INFO L124 PetriNetUnfolderBase]: 9171/12815 cut-off events. [2024-06-14 12:00:26,552 INFO L125 PetriNetUnfolderBase]: For 107197/107253 co-relation queries the response was YES. [2024-06-14 12:00:26,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56995 conditions, 12815 events. 9171/12815 cut-off events. For 107197/107253 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 72139 event pairs, 4391 based on Foata normal form. 49/12849 useless extension candidates. Maximal degree in co-relation 56962. Up to 12307 conditions per place. [2024-06-14 12:00:26,624 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 104 selfloop transitions, 39 changer transitions 0/151 dead transitions. [2024-06-14 12:00:26,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 151 transitions, 1336 flow [2024-06-14 12:00:26,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:00:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:00:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-14 12:00:26,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-14 12:00:26,625 INFO L175 Difference]: Start difference. First operand has 92 places, 117 transitions, 934 flow. Second operand 7 states and 187 transitions. [2024-06-14 12:00:26,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 151 transitions, 1336 flow [2024-06-14 12:00:26,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 151 transitions, 1212 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 12:00:26,672 INFO L231 Difference]: Finished difference. Result has 95 places, 117 transitions, 899 flow [2024-06-14 12:00:26,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=899, PETRI_PLACES=95, PETRI_TRANSITIONS=117} [2024-06-14 12:00:26,673 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-14 12:00:26,673 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 117 transitions, 899 flow [2024-06-14 12:00:26,673 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 12:00:26,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:26,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:26,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:00:26,673 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:26,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:26,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1637405090, now seen corresponding path program 4 times [2024-06-14 12:00:26,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:26,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045516838] [2024-06-14 12:00:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:26,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:27,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:27,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045516838] [2024-06-14 12:00:27,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045516838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:27,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:27,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:27,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961396718] [2024-06-14 12:00:27,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:27,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:27,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:27,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:27,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:27,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:27,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 117 transitions, 899 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 12:00:27,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:27,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:27,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:29,239 INFO L124 PetriNetUnfolderBase]: 9162/12794 cut-off events. [2024-06-14 12:00:29,239 INFO L125 PetriNetUnfolderBase]: For 118084/118116 co-relation queries the response was YES. [2024-06-14 12:00:29,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57794 conditions, 12794 events. 9162/12794 cut-off events. For 118084/118116 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 71840 event pairs, 4404 based on Foata normal form. 3/12779 useless extension candidates. Maximal degree in co-relation 57760. Up to 12241 conditions per place. [2024-06-14 12:00:29,337 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 90 selfloop transitions, 50 changer transitions 0/148 dead transitions. [2024-06-14 12:00:29,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 148 transitions, 1277 flow [2024-06-14 12:00:29,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:00:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:00:29,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-14 12:00:29,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-14 12:00:29,339 INFO L175 Difference]: Start difference. First operand has 95 places, 117 transitions, 899 flow. Second operand 7 states and 187 transitions. [2024-06-14 12:00:29,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 148 transitions, 1277 flow [2024-06-14 12:00:29,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 148 transitions, 1141 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 12:00:29,410 INFO L231 Difference]: Finished difference. Result has 95 places, 117 transitions, 874 flow [2024-06-14 12:00:29,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=874, PETRI_PLACES=95, PETRI_TRANSITIONS=117} [2024-06-14 12:00:29,411 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-14 12:00:29,411 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 117 transitions, 874 flow [2024-06-14 12:00:29,411 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 12:00:29,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:29,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:29,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:00:29,412 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:29,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:29,412 INFO L85 PathProgramCache]: Analyzing trace with hash 573014372, now seen corresponding path program 1 times [2024-06-14 12:00:29,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:29,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531909137] [2024-06-14 12:00:29,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:29,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:30,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:30,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531909137] [2024-06-14 12:00:30,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531909137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:30,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:30,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:00:30,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176564204] [2024-06-14 12:00:30,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:30,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:00:30,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:30,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:00:30,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:00:30,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-14 12:00:30,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 117 transitions, 874 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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 12:00:30,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:30,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-14 12:00:30,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:31,646 INFO L124 PetriNetUnfolderBase]: 8723/12900 cut-off events. [2024-06-14 12:00:31,646 INFO L125 PetriNetUnfolderBase]: For 125204/125221 co-relation queries the response was YES. [2024-06-14 12:00:31,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56710 conditions, 12900 events. 8723/12900 cut-off events. For 125204/125221 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 78440 event pairs, 4644 based on Foata normal form. 19/12902 useless extension candidates. Maximal degree in co-relation 56675. Up to 11777 conditions per place. [2024-06-14 12:00:31,752 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 102 selfloop transitions, 10 changer transitions 0/136 dead transitions. [2024-06-14 12:00:31,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 136 transitions, 1182 flow [2024-06-14 12:00:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:00:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:00:31,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-14 12:00:31,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-14 12:00:31,753 INFO L175 Difference]: Start difference. First operand has 95 places, 117 transitions, 874 flow. Second operand 5 states and 138 transitions. [2024-06-14 12:00:31,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 136 transitions, 1182 flow [2024-06-14 12:00:31,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 136 transitions, 1044 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:31,842 INFO L231 Difference]: Finished difference. Result has 94 places, 121 transitions, 811 flow [2024-06-14 12:00:31,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=811, PETRI_PLACES=94, PETRI_TRANSITIONS=121} [2024-06-14 12:00:31,843 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2024-06-14 12:00:31,843 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 121 transitions, 811 flow [2024-06-14 12:00:31,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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 12:00:31,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:31,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:31,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:00:31,844 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:31,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:31,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2090871794, now seen corresponding path program 1 times [2024-06-14 12:00:31,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:31,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702266099] [2024-06-14 12:00:31,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:31,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:32,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:32,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702266099] [2024-06-14 12:00:32,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702266099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:32,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:32,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:32,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061055319] [2024-06-14 12:00:32,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:32,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:32,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:32,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:32,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:33,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:33,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 121 transitions, 811 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 12:00:33,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:33,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:33,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:34,785 INFO L124 PetriNetUnfolderBase]: 9170/12756 cut-off events. [2024-06-14 12:00:34,785 INFO L125 PetriNetUnfolderBase]: For 144626/144678 co-relation queries the response was YES. [2024-06-14 12:00:34,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61636 conditions, 12756 events. 9170/12756 cut-off events. For 144626/144678 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 70483 event pairs, 4298 based on Foata normal form. 11/12756 useless extension candidates. Maximal degree in co-relation 61600. Up to 12313 conditions per place. [2024-06-14 12:00:34,888 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 124 selfloop transitions, 38 changer transitions 0/170 dead transitions. [2024-06-14 12:00:34,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 170 transitions, 1341 flow [2024-06-14 12:00:34,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-14 12:00:34,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2024-06-14 12:00:34,890 INFO L175 Difference]: Start difference. First operand has 94 places, 121 transitions, 811 flow. Second operand 8 states and 214 transitions. [2024-06-14 12:00:34,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 170 transitions, 1341 flow [2024-06-14 12:00:34,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 170 transitions, 1296 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 12:00:34,940 INFO L231 Difference]: Finished difference. Result has 99 places, 125 transitions, 918 flow [2024-06-14 12:00:34,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=918, PETRI_PLACES=99, PETRI_TRANSITIONS=125} [2024-06-14 12:00:34,941 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 42 predicate places. [2024-06-14 12:00:34,941 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 125 transitions, 918 flow [2024-06-14 12:00:34,941 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 12:00:34,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:34,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:34,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:00:34,942 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:34,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:34,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2090722064, now seen corresponding path program 2 times [2024-06-14 12:00:34,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:34,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430158044] [2024-06-14 12:00:34,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:34,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:35,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:35,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430158044] [2024-06-14 12:00:35,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430158044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:35,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:35,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:35,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589313089] [2024-06-14 12:00:35,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:35,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:35,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:35,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:35,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:36,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:36,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 125 transitions, 918 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 12:00:36,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:36,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:36,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:38,131 INFO L124 PetriNetUnfolderBase]: 9223/12842 cut-off events. [2024-06-14 12:00:38,131 INFO L125 PetriNetUnfolderBase]: For 167354/167416 co-relation queries the response was YES. [2024-06-14 12:00:38,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65386 conditions, 12842 events. 9223/12842 cut-off events. For 167354/167416 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 71084 event pairs, 4244 based on Foata normal form. 25/12856 useless extension candidates. Maximal degree in co-relation 65349. Up to 12175 conditions per place. [2024-06-14 12:00:38,216 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 99 selfloop transitions, 76 changer transitions 0/183 dead transitions. [2024-06-14 12:00:38,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 183 transitions, 1774 flow [2024-06-14 12:00:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-14 12:00:38,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-14 12:00:38,218 INFO L175 Difference]: Start difference. First operand has 99 places, 125 transitions, 918 flow. Second operand 8 states and 224 transitions. [2024-06-14 12:00:38,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 183 transitions, 1774 flow [2024-06-14 12:00:38,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 183 transitions, 1656 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:38,282 INFO L231 Difference]: Finished difference. Result has 101 places, 137 transitions, 1163 flow [2024-06-14 12:00:38,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1163, PETRI_PLACES=101, PETRI_TRANSITIONS=137} [2024-06-14 12:00:38,283 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2024-06-14 12:00:38,283 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 137 transitions, 1163 flow [2024-06-14 12:00:38,283 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 12:00:38,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:38,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:38,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:00:38,284 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:38,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:38,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1976157912, now seen corresponding path program 3 times [2024-06-14 12:00:38,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:38,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505201865] [2024-06-14 12:00:38,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:38,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:39,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:39,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505201865] [2024-06-14 12:00:39,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505201865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:39,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:39,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:39,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911215790] [2024-06-14 12:00:39,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:39,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:39,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:39,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:39,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:39,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:39,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 137 transitions, 1163 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 12:00:39,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:39,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:39,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:41,242 INFO L124 PetriNetUnfolderBase]: 9214/12838 cut-off events. [2024-06-14 12:00:41,242 INFO L125 PetriNetUnfolderBase]: For 194141/194219 co-relation queries the response was YES. [2024-06-14 12:00:41,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68509 conditions, 12838 events. 9214/12838 cut-off events. For 194141/194219 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 70942 event pairs, 4244 based on Foata normal form. 41/12868 useless extension candidates. Maximal degree in co-relation 68471. Up to 12166 conditions per place. [2024-06-14 12:00:41,345 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 98 selfloop transitions, 74 changer transitions 0/180 dead transitions. [2024-06-14 12:00:41,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 180 transitions, 1733 flow [2024-06-14 12:00:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-14 12:00:41,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-14 12:00:41,348 INFO L175 Difference]: Start difference. First operand has 101 places, 137 transitions, 1163 flow. Second operand 8 states and 222 transitions. [2024-06-14 12:00:41,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 180 transitions, 1733 flow [2024-06-14 12:00:41,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 180 transitions, 1602 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-14 12:00:41,445 INFO L231 Difference]: Finished difference. Result has 106 places, 137 transitions, 1191 flow [2024-06-14 12:00:41,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1191, PETRI_PLACES=106, PETRI_TRANSITIONS=137} [2024-06-14 12:00:41,446 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 49 predicate places. [2024-06-14 12:00:41,446 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 137 transitions, 1191 flow [2024-06-14 12:00:41,446 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 12:00:41,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:41,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:41,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:00:41,447 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:41,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:41,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1749526774, now seen corresponding path program 4 times [2024-06-14 12:00:41,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:41,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752451652] [2024-06-14 12:00:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:41,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:42,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:42,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752451652] [2024-06-14 12:00:42,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752451652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:42,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:42,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:42,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344778762] [2024-06-14 12:00:42,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:42,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:42,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:42,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:42,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:42,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:42,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 137 transitions, 1191 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 12:00:42,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:42,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:42,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:44,526 INFO L124 PetriNetUnfolderBase]: 9236/12883 cut-off events. [2024-06-14 12:00:44,526 INFO L125 PetriNetUnfolderBase]: For 210648/210722 co-relation queries the response was YES. [2024-06-14 12:00:44,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69926 conditions, 12883 events. 9236/12883 cut-off events. For 210648/210722 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 71400 event pairs, 4244 based on Foata normal form. 35/12911 useless extension candidates. Maximal degree in co-relation 69886. Up to 12189 conditions per place. [2024-06-14 12:00:44,634 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 95 selfloop transitions, 79 changer transitions 0/182 dead transitions. [2024-06-14 12:00:44,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 182 transitions, 1845 flow [2024-06-14 12:00:44,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:44,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-14 12:00:44,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2024-06-14 12:00:44,636 INFO L175 Difference]: Start difference. First operand has 106 places, 137 transitions, 1191 flow. Second operand 8 states and 218 transitions. [2024-06-14 12:00:44,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 182 transitions, 1845 flow [2024-06-14 12:00:44,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 182 transitions, 1664 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:00:44,739 INFO L231 Difference]: Finished difference. Result has 107 places, 141 transitions, 1259 flow [2024-06-14 12:00:44,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1259, PETRI_PLACES=107, PETRI_TRANSITIONS=141} [2024-06-14 12:00:44,739 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 50 predicate places. [2024-06-14 12:00:44,740 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 141 transitions, 1259 flow [2024-06-14 12:00:44,740 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 12:00:44,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:44,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:44,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:00:44,740 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:44,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:44,741 INFO L85 PathProgramCache]: Analyzing trace with hash -780042508, now seen corresponding path program 5 times [2024-06-14 12:00:44,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:44,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231251950] [2024-06-14 12:00:44,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:44,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:45,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:45,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231251950] [2024-06-14 12:00:45,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231251950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:45,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:45,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:45,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004836927] [2024-06-14 12:00:45,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:45,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:45,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:45,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:45,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:45,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:45,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 141 transitions, 1259 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 12:00:45,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:45,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:45,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:47,746 INFO L124 PetriNetUnfolderBase]: 9258/12921 cut-off events. [2024-06-14 12:00:47,746 INFO L125 PetriNetUnfolderBase]: For 227562/227636 co-relation queries the response was YES. [2024-06-14 12:00:47,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71132 conditions, 12921 events. 9258/12921 cut-off events. For 227562/227636 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 71641 event pairs, 4244 based on Foata normal form. 35/12949 useless extension candidates. Maximal degree in co-relation 71091. Up to 12212 conditions per place. [2024-06-14 12:00:47,847 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 96 selfloop transitions, 82 changer transitions 0/186 dead transitions. [2024-06-14 12:00:47,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 186 transitions, 1927 flow [2024-06-14 12:00:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-14 12:00:47,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2024-06-14 12:00:47,849 INFO L175 Difference]: Start difference. First operand has 107 places, 141 transitions, 1259 flow. Second operand 8 states and 219 transitions. [2024-06-14 12:00:47,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 186 transitions, 1927 flow [2024-06-14 12:00:47,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 186 transitions, 1661 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:47,988 INFO L231 Difference]: Finished difference. Result has 109 places, 145 transitions, 1248 flow [2024-06-14 12:00:47,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1248, PETRI_PLACES=109, PETRI_TRANSITIONS=145} [2024-06-14 12:00:47,989 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 52 predicate places. [2024-06-14 12:00:47,989 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 145 transitions, 1248 flow [2024-06-14 12:00:47,989 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 12:00:47,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:47,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:47,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:00:47,990 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:47,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:47,990 INFO L85 PathProgramCache]: Analyzing trace with hash -772690858, now seen corresponding path program 6 times [2024-06-14 12:00:47,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:47,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326562061] [2024-06-14 12:00:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:47,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:48,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:48,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326562061] [2024-06-14 12:00:48,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326562061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:48,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:48,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:48,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108108237] [2024-06-14 12:00:48,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:48,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:48,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:48,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:49,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:49,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:49,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 145 transitions, 1248 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 12:00:49,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:49,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:49,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:51,137 INFO L124 PetriNetUnfolderBase]: 9249/12909 cut-off events. [2024-06-14 12:00:51,137 INFO L125 PetriNetUnfolderBase]: For 243269/243343 co-relation queries the response was YES. [2024-06-14 12:00:51,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71822 conditions, 12909 events. 9249/12909 cut-off events. For 243269/243343 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 71586 event pairs, 4244 based on Foata normal form. 19/12921 useless extension candidates. Maximal degree in co-relation 71780. Up to 12203 conditions per place. [2024-06-14 12:00:51,240 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 89 selfloop transitions, 86 changer transitions 0/183 dead transitions. [2024-06-14 12:00:51,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 183 transitions, 1718 flow [2024-06-14 12:00:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:51,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:51,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-14 12:00:51,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2024-06-14 12:00:51,242 INFO L175 Difference]: Start difference. First operand has 109 places, 145 transitions, 1248 flow. Second operand 8 states and 214 transitions. [2024-06-14 12:00:51,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 183 transitions, 1718 flow [2024-06-14 12:00:51,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 183 transitions, 1489 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 12:00:51,353 INFO L231 Difference]: Finished difference. Result has 112 places, 145 transitions, 1202 flow [2024-06-14 12:00:51,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1202, PETRI_PLACES=112, PETRI_TRANSITIONS=145} [2024-06-14 12:00:51,354 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 55 predicate places. [2024-06-14 12:00:51,354 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 145 transitions, 1202 flow [2024-06-14 12:00:51,354 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 12:00:51,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:51,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:51,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:00:51,354 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:51,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:51,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1738324621, now seen corresponding path program 1 times [2024-06-14 12:00:51,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:51,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756132878] [2024-06-14 12:00:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:51,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:52,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:52,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756132878] [2024-06-14 12:00:52,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756132878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:52,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:52,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:52,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649562448] [2024-06-14 12:00:52,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:52,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:52,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:52,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:52,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:52,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:52,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 145 transitions, 1202 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 12:00:52,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:52,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:52,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:54,534 INFO L124 PetriNetUnfolderBase]: 9902/14196 cut-off events. [2024-06-14 12:00:54,534 INFO L125 PetriNetUnfolderBase]: For 266200/266202 co-relation queries the response was YES. [2024-06-14 12:00:54,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76615 conditions, 14196 events. 9902/14196 cut-off events. For 266200/266202 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 81488 event pairs, 4467 based on Foata normal form. 6/14184 useless extension candidates. Maximal degree in co-relation 76572. Up to 13371 conditions per place. [2024-06-14 12:00:54,804 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 162 selfloop transitions, 21 changer transitions 0/191 dead transitions. [2024-06-14 12:00:54,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 191 transitions, 1777 flow [2024-06-14 12:00:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:54,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 12:00:54,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-14 12:00:54,806 INFO L175 Difference]: Start difference. First operand has 112 places, 145 transitions, 1202 flow. Second operand 8 states and 208 transitions. [2024-06-14 12:00:54,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 191 transitions, 1777 flow [2024-06-14 12:00:54,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 191 transitions, 1566 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 12:00:54,912 INFO L231 Difference]: Finished difference. Result has 113 places, 152 transitions, 1143 flow [2024-06-14 12:00:54,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1143, PETRI_PLACES=113, PETRI_TRANSITIONS=152} [2024-06-14 12:00:54,913 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2024-06-14 12:00:54,913 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 152 transitions, 1143 flow [2024-06-14 12:00:54,913 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 12:00:54,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:54,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:54,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:00:54,913 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:54,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:54,914 INFO L85 PathProgramCache]: Analyzing trace with hash -178129199, now seen corresponding path program 1 times [2024-06-14 12:00:54,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:54,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931555543] [2024-06-14 12:00:54,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:54,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:56,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:56,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931555543] [2024-06-14 12:00:56,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931555543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:56,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:56,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:56,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572707042] [2024-06-14 12:00:56,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:56,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:56,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:56,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:56,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:56,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:56,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 152 transitions, 1143 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 12:00:56,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:56,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:56,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:58,306 INFO L124 PetriNetUnfolderBase]: 11017/15351 cut-off events. [2024-06-14 12:00:58,306 INFO L125 PetriNetUnfolderBase]: For 347369/347588 co-relation queries the response was YES. [2024-06-14 12:00:58,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89558 conditions, 15351 events. 11017/15351 cut-off events. For 347369/347588 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 86379 event pairs, 4180 based on Foata normal form. 14/15349 useless extension candidates. Maximal degree in co-relation 89513. Up to 14682 conditions per place. [2024-06-14 12:00:58,463 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 163 selfloop transitions, 43 changer transitions 0/215 dead transitions. [2024-06-14 12:00:58,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 215 transitions, 1989 flow [2024-06-14 12:00:58,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-14 12:00:58,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:00:58,465 INFO L175 Difference]: Start difference. First operand has 113 places, 152 transitions, 1143 flow. Second operand 9 states and 243 transitions. [2024-06-14 12:00:58,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 215 transitions, 1989 flow [2024-06-14 12:00:58,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 215 transitions, 1899 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 12:00:58,645 INFO L231 Difference]: Finished difference. Result has 117 places, 158 transitions, 1283 flow [2024-06-14 12:00:58,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1283, PETRI_PLACES=117, PETRI_TRANSITIONS=158} [2024-06-14 12:00:58,645 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 60 predicate places. [2024-06-14 12:00:58,645 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 158 transitions, 1283 flow [2024-06-14 12:00:58,646 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 12:00:58,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:58,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:58,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:00:58,646 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:58,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:58,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1246647553, now seen corresponding path program 2 times [2024-06-14 12:00:58,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:58,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221016333] [2024-06-14 12:00:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:58,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:59,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:59,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221016333] [2024-06-14 12:00:59,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221016333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:59,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:59,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:59,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897947174] [2024-06-14 12:00:59,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:59,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:59,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:59,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:59,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:59,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:59,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 158 transitions, 1283 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 12:00:59,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:59,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:59,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:02,042 INFO L124 PetriNetUnfolderBase]: 11002/15320 cut-off events. [2024-06-14 12:01:02,042 INFO L125 PetriNetUnfolderBase]: For 385034/385253 co-relation queries the response was YES. [2024-06-14 12:01:02,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92068 conditions, 15320 events. 11002/15320 cut-off events. For 385034/385253 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 85960 event pairs, 4808 based on Foata normal form. 14/15318 useless extension candidates. Maximal degree in co-relation 92022. Up to 14768 conditions per place. [2024-06-14 12:01:02,197 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 158 selfloop transitions, 37 changer transitions 0/204 dead transitions. [2024-06-14 12:01:02,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 204 transitions, 1825 flow [2024-06-14 12:01:02,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:02,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-14 12:01:02,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2024-06-14 12:01:02,199 INFO L175 Difference]: Start difference. First operand has 117 places, 158 transitions, 1283 flow. Second operand 8 states and 214 transitions. [2024-06-14 12:01:02,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 204 transitions, 1825 flow [2024-06-14 12:01:02,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 204 transitions, 1672 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:02,444 INFO L231 Difference]: Finished difference. Result has 120 places, 158 transitions, 1215 flow [2024-06-14 12:01:02,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1215, PETRI_PLACES=120, PETRI_TRANSITIONS=158} [2024-06-14 12:01:02,445 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-14 12:01:02,445 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 158 transitions, 1215 flow [2024-06-14 12:01:02,445 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 12:01:02,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:02,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:02,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:01:02,446 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:02,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:02,446 INFO L85 PathProgramCache]: Analyzing trace with hash -173542439, now seen corresponding path program 3 times [2024-06-14 12:01:02,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:02,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329647666] [2024-06-14 12:01:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:02,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:03,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:03,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329647666] [2024-06-14 12:01:03,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329647666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:03,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:03,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:03,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019769855] [2024-06-14 12:01:03,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:03,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:03,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:03,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:03,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:03,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:03,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 158 transitions, 1215 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 12:01:03,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:03,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:03,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:05,681 INFO L124 PetriNetUnfolderBase]: 11038/15371 cut-off events. [2024-06-14 12:01:05,681 INFO L125 PetriNetUnfolderBase]: For 412655/412872 co-relation queries the response was YES. [2024-06-14 12:01:05,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93366 conditions, 15371 events. 11038/15371 cut-off events. For 412655/412872 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 86387 event pairs, 4821 based on Foata normal form. 10/15365 useless extension candidates. Maximal degree in co-relation 93318. Up to 14745 conditions per place. [2024-06-14 12:01:05,830 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 140 selfloop transitions, 53 changer transitions 0/202 dead transitions. [2024-06-14 12:01:05,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 202 transitions, 1799 flow [2024-06-14 12:01:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-14 12:01:05,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-14 12:01:05,832 INFO L175 Difference]: Start difference. First operand has 120 places, 158 transitions, 1215 flow. Second operand 8 states and 215 transitions. [2024-06-14 12:01:05,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 202 transitions, 1799 flow [2024-06-14 12:01:06,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 202 transitions, 1715 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:06,040 INFO L231 Difference]: Finished difference. Result has 121 places, 161 transitions, 1323 flow [2024-06-14 12:01:06,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1323, PETRI_PLACES=121, PETRI_TRANSITIONS=161} [2024-06-14 12:01:06,041 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 64 predicate places. [2024-06-14 12:01:06,041 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 161 transitions, 1323 flow [2024-06-14 12:01:06,041 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 12:01:06,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:06,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:06,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:01:06,043 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:06,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:06,043 INFO L85 PathProgramCache]: Analyzing trace with hash 898646787, now seen corresponding path program 1 times [2024-06-14 12:01:06,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:06,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382110220] [2024-06-14 12:01:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:06,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:06,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:06,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382110220] [2024-06-14 12:01:06,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382110220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:06,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:06,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:01:06,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909557058] [2024-06-14 12:01:06,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:06,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:01:06,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:06,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:01:06,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:01:06,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:01:06,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 161 transitions, 1323 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 12:01:06,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:06,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:01:06,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:08,914 INFO L124 PetriNetUnfolderBase]: 10194/14567 cut-off events. [2024-06-14 12:01:08,914 INFO L125 PetriNetUnfolderBase]: For 439791/439836 co-relation queries the response was YES. [2024-06-14 12:01:08,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89647 conditions, 14567 events. 10194/14567 cut-off events. For 439791/439836 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 84572 event pairs, 4917 based on Foata normal form. 23/14535 useless extension candidates. Maximal degree in co-relation 89598. Up to 13654 conditions per place. [2024-06-14 12:01:09,067 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 136 selfloop transitions, 35 changer transitions 0/197 dead transitions. [2024-06-14 12:01:09,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 197 transitions, 1959 flow [2024-06-14 12:01:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:01:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:01:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-14 12:01:09,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216049382716049 [2024-06-14 12:01:09,068 INFO L175 Difference]: Start difference. First operand has 121 places, 161 transitions, 1323 flow. Second operand 6 states and 169 transitions. [2024-06-14 12:01:09,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 197 transitions, 1959 flow [2024-06-14 12:01:09,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 197 transitions, 1793 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:09,370 INFO L231 Difference]: Finished difference. Result has 121 places, 169 transitions, 1364 flow [2024-06-14 12:01:09,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1364, PETRI_PLACES=121, PETRI_TRANSITIONS=169} [2024-06-14 12:01:09,370 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 64 predicate places. [2024-06-14 12:01:09,371 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 169 transitions, 1364 flow [2024-06-14 12:01:09,371 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 12:01:09,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:09,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:09,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:01:09,371 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:09,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:09,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1588309793, now seen corresponding path program 4 times [2024-06-14 12:01:09,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:09,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814180356] [2024-06-14 12:01:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:09,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:10,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:10,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814180356] [2024-06-14 12:01:10,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814180356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:10,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:10,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:10,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294888174] [2024-06-14 12:01:10,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:10,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:10,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:10,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:10,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:10,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:10,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 169 transitions, 1364 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 12:01:10,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:10,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:10,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:12,726 INFO L124 PetriNetUnfolderBase]: 11087/15458 cut-off events. [2024-06-14 12:01:12,726 INFO L125 PetriNetUnfolderBase]: For 485991/486204 co-relation queries the response was YES. [2024-06-14 12:01:12,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99690 conditions, 15458 events. 11087/15458 cut-off events. For 485991/486204 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 87195 event pairs, 4795 based on Foata normal form. 6/15447 useless extension candidates. Maximal degree in co-relation 99640. Up to 14808 conditions per place. [2024-06-14 12:01:12,890 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 149 selfloop transitions, 53 changer transitions 0/211 dead transitions. [2024-06-14 12:01:12,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 211 transitions, 1968 flow [2024-06-14 12:01:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 12:01:12,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-14 12:01:12,891 INFO L175 Difference]: Start difference. First operand has 121 places, 169 transitions, 1364 flow. Second operand 8 states and 212 transitions. [2024-06-14 12:01:12,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 211 transitions, 1968 flow [2024-06-14 12:01:13,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 211 transitions, 1912 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-14 12:01:13,101 INFO L231 Difference]: Finished difference. Result has 127 places, 172 transitions, 1508 flow [2024-06-14 12:01:13,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1508, PETRI_PLACES=127, PETRI_TRANSITIONS=172} [2024-06-14 12:01:13,102 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 70 predicate places. [2024-06-14 12:01:13,102 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 172 transitions, 1508 flow [2024-06-14 12:01:13,102 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 12:01:13,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:13,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:13,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:01:13,103 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:13,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:13,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1167071489, now seen corresponding path program 2 times [2024-06-14 12:01:13,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:13,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675952617] [2024-06-14 12:01:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:13,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:13,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:13,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675952617] [2024-06-14 12:01:13,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675952617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:13,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:13,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:01:13,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916340551] [2024-06-14 12:01:13,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:13,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:01:13,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:13,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:01:13,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:01:13,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:01:13,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 172 transitions, 1508 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 12:01:13,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:13,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:01:13,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:16,088 INFO L124 PetriNetUnfolderBase]: 10163/14515 cut-off events. [2024-06-14 12:01:16,089 INFO L125 PetriNetUnfolderBase]: For 510941/510956 co-relation queries the response was YES. [2024-06-14 12:01:16,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94750 conditions, 14515 events. 10163/14515 cut-off events. For 510941/510956 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 84226 event pairs, 4913 based on Foata normal form. 18/14478 useless extension candidates. Maximal degree in co-relation 94698. Up to 13625 conditions per place. [2024-06-14 12:01:16,246 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 130 selfloop transitions, 35 changer transitions 0/192 dead transitions. [2024-06-14 12:01:16,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 192 transitions, 1898 flow [2024-06-14 12:01:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:01:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:01:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 12:01:16,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-06-14 12:01:16,247 INFO L175 Difference]: Start difference. First operand has 127 places, 172 transitions, 1508 flow. Second operand 6 states and 160 transitions. [2024-06-14 12:01:16,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 192 transitions, 1898 flow [2024-06-14 12:01:16,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 192 transitions, 1694 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:16,547 INFO L231 Difference]: Finished difference. Result has 127 places, 172 transitions, 1383 flow [2024-06-14 12:01:16,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1383, PETRI_PLACES=127, PETRI_TRANSITIONS=172} [2024-06-14 12:01:16,548 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 70 predicate places. [2024-06-14 12:01:16,548 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 172 transitions, 1383 flow [2024-06-14 12:01:16,548 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 12:01:16,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:16,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:16,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:01:16,549 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:16,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:16,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1909729235, now seen corresponding path program 1 times [2024-06-14 12:01:16,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:16,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613645715] [2024-06-14 12:01:16,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:16,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:17,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:17,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613645715] [2024-06-14 12:01:17,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613645715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:17,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:17,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:01:17,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311540723] [2024-06-14 12:01:17,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:17,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:01:17,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:17,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:01:17,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:01:17,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:17,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 172 transitions, 1383 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 12:01:17,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:17,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:17,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:19,664 INFO L124 PetriNetUnfolderBase]: 10063/14397 cut-off events. [2024-06-14 12:01:19,664 INFO L125 PetriNetUnfolderBase]: For 473024/473026 co-relation queries the response was YES. [2024-06-14 12:01:19,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92186 conditions, 14397 events. 10063/14397 cut-off events. For 473024/473026 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 82336 event pairs, 4262 based on Foata normal form. 4/14372 useless extension candidates. Maximal degree in co-relation 92133. Up to 13591 conditions per place. [2024-06-14 12:01:19,798 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 177 selfloop transitions, 21 changer transitions 0/206 dead transitions. [2024-06-14 12:01:19,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 206 transitions, 2103 flow [2024-06-14 12:01:19,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:01:19,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:01:19,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-14 12:01:19,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49691358024691357 [2024-06-14 12:01:19,799 INFO L175 Difference]: Start difference. First operand has 127 places, 172 transitions, 1383 flow. Second operand 6 states and 161 transitions. [2024-06-14 12:01:19,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 206 transitions, 2103 flow [2024-06-14 12:01:20,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 206 transitions, 1998 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:20,050 INFO L231 Difference]: Finished difference. Result has 128 places, 180 transitions, 1477 flow [2024-06-14 12:01:20,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1477, PETRI_PLACES=128, PETRI_TRANSITIONS=180} [2024-06-14 12:01:20,051 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 71 predicate places. [2024-06-14 12:01:20,051 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 180 transitions, 1477 flow [2024-06-14 12:01:20,051 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 12:01:20,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:20,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:20,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:01:20,052 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:20,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:20,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1769907429, now seen corresponding path program 2 times [2024-06-14 12:01:20,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:20,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266161702] [2024-06-14 12:01:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:20,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:20,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:20,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266161702] [2024-06-14 12:01:20,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266161702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:20,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:20,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:01:20,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603485122] [2024-06-14 12:01:20,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:20,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:01:20,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:20,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:01:20,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:01:20,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:20,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 180 transitions, 1477 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 12:01:20,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:20,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:20,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:23,040 INFO L124 PetriNetUnfolderBase]: 10049/14381 cut-off events. [2024-06-14 12:01:23,041 INFO L125 PetriNetUnfolderBase]: For 506935/506941 co-relation queries the response was YES. [2024-06-14 12:01:23,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94875 conditions, 14381 events. 10049/14381 cut-off events. For 506935/506941 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 82243 event pairs, 4239 based on Foata normal form. 8/14363 useless extension candidates. Maximal degree in co-relation 94821. Up to 13579 conditions per place. [2024-06-14 12:01:23,171 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 171 selfloop transitions, 21 changer transitions 0/200 dead transitions. [2024-06-14 12:01:23,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 200 transitions, 1921 flow [2024-06-14 12:01:23,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:01:23,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:01:23,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 12:01:23,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783950617283951 [2024-06-14 12:01:23,172 INFO L175 Difference]: Start difference. First operand has 128 places, 180 transitions, 1477 flow. Second operand 6 states and 155 transitions. [2024-06-14 12:01:23,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 200 transitions, 1921 flow [2024-06-14 12:01:23,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 200 transitions, 1805 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-14 12:01:23,439 INFO L231 Difference]: Finished difference. Result has 132 places, 180 transitions, 1412 flow [2024-06-14 12:01:23,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1412, PETRI_PLACES=132, PETRI_TRANSITIONS=180} [2024-06-14 12:01:23,440 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 75 predicate places. [2024-06-14 12:01:23,440 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 180 transitions, 1412 flow [2024-06-14 12:01:23,440 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 12:01:23,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:23,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:23,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:01:23,440 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:23,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:23,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1420847097, now seen corresponding path program 1 times [2024-06-14 12:01:23,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:23,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890573834] [2024-06-14 12:01:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:23,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:24,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:24,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890573834] [2024-06-14 12:01:24,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890573834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:24,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:24,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:24,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506779348] [2024-06-14 12:01:24,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:24,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:24,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:24,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:24,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:24,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:24,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 180 transitions, 1412 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:24,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:24,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:24,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:27,430 INFO L124 PetriNetUnfolderBase]: 11351/15870 cut-off events. [2024-06-14 12:01:27,431 INFO L125 PetriNetUnfolderBase]: For 659332/659539 co-relation queries the response was YES. [2024-06-14 12:01:27,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110912 conditions, 15870 events. 11351/15870 cut-off events. For 659332/659539 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 90422 event pairs, 4027 based on Foata normal form. 47/15902 useless extension candidates. Maximal degree in co-relation 110856. Up to 14824 conditions per place. [2024-06-14 12:01:27,594 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 197 selfloop transitions, 48 changer transitions 0/254 dead transitions. [2024-06-14 12:01:27,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 254 transitions, 2450 flow [2024-06-14 12:01:27,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:01:27,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:01:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-06-14 12:01:27,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2024-06-14 12:01:27,595 INFO L175 Difference]: Start difference. First operand has 132 places, 180 transitions, 1412 flow. Second operand 10 states and 273 transitions. [2024-06-14 12:01:27,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 254 transitions, 2450 flow [2024-06-14 12:01:27,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 254 transitions, 2385 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:27,997 INFO L231 Difference]: Finished difference. Result has 137 places, 184 transitions, 1596 flow [2024-06-14 12:01:27,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1596, PETRI_PLACES=137, PETRI_TRANSITIONS=184} [2024-06-14 12:01:27,997 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 80 predicate places. [2024-06-14 12:01:27,997 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 184 transitions, 1596 flow [2024-06-14 12:01:27,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:27,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:27,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:27,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:01:27,998 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:27,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:27,999 INFO L85 PathProgramCache]: Analyzing trace with hash -850688111, now seen corresponding path program 2 times [2024-06-14 12:01:27,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:27,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296505766] [2024-06-14 12:01:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:27,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:29,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:29,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296505766] [2024-06-14 12:01:29,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296505766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:29,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:29,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:29,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577038646] [2024-06-14 12:01:29,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:29,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:29,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:29,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:29,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:29,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:29,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 184 transitions, 1596 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:29,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:29,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:29,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:31,912 INFO L124 PetriNetUnfolderBase]: 11428/16005 cut-off events. [2024-06-14 12:01:31,912 INFO L125 PetriNetUnfolderBase]: For 712320/712551 co-relation queries the response was YES. [2024-06-14 12:01:31,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114082 conditions, 16005 events. 11428/16005 cut-off events. For 712320/712551 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 91389 event pairs, 4698 based on Foata normal form. 53/16037 useless extension candidates. Maximal degree in co-relation 114025. Up to 15263 conditions per place. [2024-06-14 12:01:32,072 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 193 selfloop transitions, 40 changer transitions 0/242 dead transitions. [2024-06-14 12:01:32,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 242 transitions, 2336 flow [2024-06-14 12:01:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:32,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-14 12:01:32,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49588477366255146 [2024-06-14 12:01:32,074 INFO L175 Difference]: Start difference. First operand has 137 places, 184 transitions, 1596 flow. Second operand 9 states and 241 transitions. [2024-06-14 12:01:32,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 242 transitions, 2336 flow [2024-06-14 12:01:32,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 242 transitions, 2227 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:32,454 INFO L231 Difference]: Finished difference. Result has 140 places, 186 transitions, 1655 flow [2024-06-14 12:01:32,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1655, PETRI_PLACES=140, PETRI_TRANSITIONS=186} [2024-06-14 12:01:32,454 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 83 predicate places. [2024-06-14 12:01:32,454 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 186 transitions, 1655 flow [2024-06-14 12:01:32,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:32,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:32,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:32,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:01:32,455 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:32,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:32,455 INFO L85 PathProgramCache]: Analyzing trace with hash -850835981, now seen corresponding path program 3 times [2024-06-14 12:01:32,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:32,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102994273] [2024-06-14 12:01:32,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:32,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:33,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:33,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102994273] [2024-06-14 12:01:33,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102994273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:33,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:33,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:33,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444023227] [2024-06-14 12:01:33,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:33,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:33,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:33,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:33,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:34,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:34,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 186 transitions, 1655 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:34,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:34,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:34,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:36,602 INFO L124 PetriNetUnfolderBase]: 11389/15948 cut-off events. [2024-06-14 12:01:36,603 INFO L125 PetriNetUnfolderBase]: For 737286/737493 co-relation queries the response was YES. [2024-06-14 12:01:36,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113962 conditions, 15948 events. 11389/15948 cut-off events. For 737286/737493 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 91053 event pairs, 4653 based on Foata normal form. 47/15980 useless extension candidates. Maximal degree in co-relation 113903. Up to 15054 conditions per place. [2024-06-14 12:01:36,798 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 193 selfloop transitions, 43 changer transitions 0/245 dead transitions. [2024-06-14 12:01:36,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 245 transitions, 2341 flow [2024-06-14 12:01:36,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:36,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:36,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-14 12:01:36,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020576131687243 [2024-06-14 12:01:36,799 INFO L175 Difference]: Start difference. First operand has 140 places, 186 transitions, 1655 flow. Second operand 9 states and 244 transitions. [2024-06-14 12:01:36,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 245 transitions, 2341 flow [2024-06-14 12:01:37,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 245 transitions, 2213 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:37,305 INFO L231 Difference]: Finished difference. Result has 142 places, 186 transitions, 1622 flow [2024-06-14 12:01:37,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1622, PETRI_PLACES=142, PETRI_TRANSITIONS=186} [2024-06-14 12:01:37,306 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 85 predicate places. [2024-06-14 12:01:37,306 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 186 transitions, 1622 flow [2024-06-14 12:01:37,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:37,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:37,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:37,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:01:37,306 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:37,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:37,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1079336389, now seen corresponding path program 4 times [2024-06-14 12:01:37,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:37,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294654325] [2024-06-14 12:01:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:37,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:38,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:38,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294654325] [2024-06-14 12:01:38,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294654325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:38,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:38,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:38,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19965726] [2024-06-14 12:01:38,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:38,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:38,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:38,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:38,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:38,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 186 transitions, 1622 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:38,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:38,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:38,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:41,708 INFO L124 PetriNetUnfolderBase]: 11517/16152 cut-off events. [2024-06-14 12:01:41,708 INFO L125 PetriNetUnfolderBase]: For 776321/776538 co-relation queries the response was YES. [2024-06-14 12:01:41,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116139 conditions, 16152 events. 11517/16152 cut-off events. For 776321/776538 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 92581 event pairs, 4734 based on Foata normal form. 92/16226 useless extension candidates. Maximal degree in co-relation 116079. Up to 15172 conditions per place. [2024-06-14 12:01:41,868 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 141 selfloop transitions, 89 changer transitions 0/239 dead transitions. [2024-06-14 12:01:41,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 239 transitions, 2332 flow [2024-06-14 12:01:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-14 12:01:41,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041152263374485 [2024-06-14 12:01:41,870 INFO L175 Difference]: Start difference. First operand has 142 places, 186 transitions, 1622 flow. Second operand 9 states and 245 transitions. [2024-06-14 12:01:41,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 239 transitions, 2332 flow [2024-06-14 12:01:42,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 239 transitions, 2207 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 12:01:42,238 INFO L231 Difference]: Finished difference. Result has 143 places, 188 transitions, 1763 flow [2024-06-14 12:01:42,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1763, PETRI_PLACES=143, PETRI_TRANSITIONS=188} [2024-06-14 12:01:42,238 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 86 predicate places. [2024-06-14 12:01:42,239 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 188 transitions, 1763 flow [2024-06-14 12:01:42,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:42,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:42,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:42,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:01:42,239 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:42,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:42,239 INFO L85 PathProgramCache]: Analyzing trace with hash -712159961, now seen corresponding path program 5 times [2024-06-14 12:01:42,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:42,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670482682] [2024-06-14 12:01:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:43,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:43,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670482682] [2024-06-14 12:01:43,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670482682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:43,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:43,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:43,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253952283] [2024-06-14 12:01:43,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:43,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:43,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:43,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:43,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:43,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:43,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 188 transitions, 1763 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:43,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:43,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:43,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:46,405 INFO L124 PetriNetUnfolderBase]: 11681/16438 cut-off events. [2024-06-14 12:01:46,405 INFO L125 PetriNetUnfolderBase]: For 832862/833087 co-relation queries the response was YES. [2024-06-14 12:01:46,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120069 conditions, 16438 events. 11681/16438 cut-off events. For 832862/833087 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 95001 event pairs, 4658 based on Foata normal form. 92/16501 useless extension candidates. Maximal degree in co-relation 120008. Up to 15386 conditions per place. [2024-06-14 12:01:46,567 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 145 selfloop transitions, 87 changer transitions 0/241 dead transitions. [2024-06-14 12:01:46,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 241 transitions, 2481 flow [2024-06-14 12:01:46,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-14 12:01:46,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2024-06-14 12:01:46,569 INFO L175 Difference]: Start difference. First operand has 143 places, 188 transitions, 1763 flow. Second operand 9 states and 246 transitions. [2024-06-14 12:01:46,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 241 transitions, 2481 flow [2024-06-14 12:01:47,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 241 transitions, 2267 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:47,298 INFO L231 Difference]: Finished difference. Result has 145 places, 190 transitions, 1815 flow [2024-06-14 12:01:47,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1815, PETRI_PLACES=145, PETRI_TRANSITIONS=190} [2024-06-14 12:01:47,298 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 88 predicate places. [2024-06-14 12:01:47,299 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 190 transitions, 1815 flow [2024-06-14 12:01:47,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:47,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:47,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:47,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:01:47,299 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:47,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:47,299 INFO L85 PathProgramCache]: Analyzing trace with hash -712307831, now seen corresponding path program 6 times [2024-06-14 12:01:47,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:47,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516524403] [2024-06-14 12:01:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:47,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:48,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:48,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516524403] [2024-06-14 12:01:48,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516524403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:48,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:48,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:48,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953460773] [2024-06-14 12:01:48,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:48,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:48,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:48,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:48,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:48,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:48,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 190 transitions, 1815 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:48,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:48,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:48,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:51,559 INFO L124 PetriNetUnfolderBase]: 11802/16639 cut-off events. [2024-06-14 12:01:51,559 INFO L125 PetriNetUnfolderBase]: For 883575/883776 co-relation queries the response was YES. [2024-06-14 12:01:51,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123588 conditions, 16639 events. 11802/16639 cut-off events. For 883575/883776 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 96367 event pairs, 4579 based on Foata normal form. 86/16702 useless extension candidates. Maximal degree in co-relation 123526. Up to 15281 conditions per place. [2024-06-14 12:01:51,724 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 144 selfloop transitions, 93 changer transitions 0/246 dead transitions. [2024-06-14 12:01:51,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 246 transitions, 2561 flow [2024-06-14 12:01:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:51,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-14 12:01:51,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102880658436214 [2024-06-14 12:01:51,725 INFO L175 Difference]: Start difference. First operand has 145 places, 190 transitions, 1815 flow. Second operand 9 states and 248 transitions. [2024-06-14 12:01:51,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 246 transitions, 2561 flow [2024-06-14 12:01:52,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 246 transitions, 2347 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:52,332 INFO L231 Difference]: Finished difference. Result has 147 places, 192 transitions, 1882 flow [2024-06-14 12:01:52,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1882, PETRI_PLACES=147, PETRI_TRANSITIONS=192} [2024-06-14 12:01:52,334 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 90 predicate places. [2024-06-14 12:01:52,334 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 192 transitions, 1882 flow [2024-06-14 12:01:52,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:52,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:52,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:52,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:01:52,334 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:52,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:52,335 INFO L85 PathProgramCache]: Analyzing trace with hash -706582100, now seen corresponding path program 1 times [2024-06-14 12:01:52,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:52,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316687862] [2024-06-14 12:01:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:52,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:53,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:53,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316687862] [2024-06-14 12:01:53,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316687862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:53,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:53,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:53,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014580972] [2024-06-14 12:01:53,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:53,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:53,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:53,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:53,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:53,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:01:53,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 192 transitions, 1882 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:53,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:53,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:01:53,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:56,574 INFO L124 PetriNetUnfolderBase]: 12356/17351 cut-off events. [2024-06-14 12:01:56,574 INFO L125 PetriNetUnfolderBase]: For 934843/934853 co-relation queries the response was YES. [2024-06-14 12:01:56,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127247 conditions, 17351 events. 12356/17351 cut-off events. For 934843/934853 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 98765 event pairs, 4873 based on Foata normal form. 14/17359 useless extension candidates. Maximal degree in co-relation 127184. Up to 16618 conditions per place. [2024-06-14 12:01:56,761 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 195 selfloop transitions, 49 changer transitions 0/251 dead transitions. [2024-06-14 12:01:56,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 251 transitions, 2663 flow [2024-06-14 12:01:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:56,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-14 12:01:56,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-14 12:01:56,763 INFO L175 Difference]: Start difference. First operand has 147 places, 192 transitions, 1882 flow. Second operand 9 states and 234 transitions. [2024-06-14 12:01:56,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 251 transitions, 2663 flow [2024-06-14 12:01:57,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 251 transitions, 2412 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:57,478 INFO L231 Difference]: Finished difference. Result has 150 places, 199 transitions, 1873 flow [2024-06-14 12:01:57,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1873, PETRI_PLACES=150, PETRI_TRANSITIONS=199} [2024-06-14 12:01:57,478 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 93 predicate places. [2024-06-14 12:01:57,478 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 199 transitions, 1873 flow [2024-06-14 12:01:57,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:57,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:57,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:57,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:01:57,479 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:57,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:57,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1963112589, now seen corresponding path program 7 times [2024-06-14 12:01:57,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:57,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294015279] [2024-06-14 12:01:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:57,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:58,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:58,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294015279] [2024-06-14 12:01:58,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294015279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:58,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:58,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:58,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599704941] [2024-06-14 12:01:58,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:58,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:58,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:58,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:58,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:58,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:58,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 199 transitions, 1873 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:58,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:58,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:58,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:01,993 INFO L124 PetriNetUnfolderBase]: 11912/16893 cut-off events. [2024-06-14 12:02:01,993 INFO L125 PetriNetUnfolderBase]: For 999650/999826 co-relation queries the response was YES. [2024-06-14 12:02:02,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129343 conditions, 16893 events. 11912/16893 cut-off events. For 999650/999826 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 98968 event pairs, 4455 based on Foata normal form. 88/16965 useless extension candidates. Maximal degree in co-relation 129278. Up to 15761 conditions per place. [2024-06-14 12:02:02,195 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 150 selfloop transitions, 90 changer transitions 0/250 dead transitions. [2024-06-14 12:02:02,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 250 transitions, 2613 flow [2024-06-14 12:02:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:02:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:02:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-14 12:02:02,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49794238683127573 [2024-06-14 12:02:02,197 INFO L175 Difference]: Start difference. First operand has 150 places, 199 transitions, 1873 flow. Second operand 9 states and 242 transitions. [2024-06-14 12:02:02,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 250 transitions, 2613 flow [2024-06-14 12:02:02,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 250 transitions, 2433 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 12:02:02,649 INFO L231 Difference]: Finished difference. Result has 153 places, 201 transitions, 1977 flow [2024-06-14 12:02:02,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1977, PETRI_PLACES=153, PETRI_TRANSITIONS=201} [2024-06-14 12:02:02,650 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 96 predicate places. [2024-06-14 12:02:02,650 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 201 transitions, 1977 flow [2024-06-14 12:02:02,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:02,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:02,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:02,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:02:02,650 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:02:02,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:02,651 INFO L85 PathProgramCache]: Analyzing trace with hash 473476309, now seen corresponding path program 8 times [2024-06-14 12:02:02,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:02,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255337] [2024-06-14 12:02:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:02,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:04,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:04,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255337] [2024-06-14 12:02:04,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:04,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:04,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:02:04,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490842221] [2024-06-14 12:02:04,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:04,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:02:04,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:04,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:02:04,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:02:04,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:02:04,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 201 transitions, 1977 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:04,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:04,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:02:04,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:07,501 INFO L124 PetriNetUnfolderBase]: 11989/17009 cut-off events. [2024-06-14 12:02:07,502 INFO L125 PetriNetUnfolderBase]: For 1075122/1075314 co-relation queries the response was YES. [2024-06-14 12:02:07,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132663 conditions, 17009 events. 11989/17009 cut-off events. For 1075122/1075314 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 100027 event pairs, 4787 based on Foata normal form. 94/17082 useless extension candidates. Maximal degree in co-relation 132597. Up to 15857 conditions per place. [2024-06-14 12:02:07,675 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 149 selfloop transitions, 93 changer transitions 0/252 dead transitions. [2024-06-14 12:02:07,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 252 transitions, 2725 flow [2024-06-14 12:02:07,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:02:07,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:02:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-14 12:02:07,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49588477366255146 [2024-06-14 12:02:07,676 INFO L175 Difference]: Start difference. First operand has 153 places, 201 transitions, 1977 flow. Second operand 9 states and 241 transitions. [2024-06-14 12:02:07,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 252 transitions, 2725 flow [2024-06-14 12:02:08,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 252 transitions, 2493 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 12:02:08,152 INFO L231 Difference]: Finished difference. Result has 155 places, 203 transitions, 2039 flow [2024-06-14 12:02:08,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2039, PETRI_PLACES=155, PETRI_TRANSITIONS=203} [2024-06-14 12:02:08,153 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 98 predicate places. [2024-06-14 12:02:08,153 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 203 transitions, 2039 flow [2024-06-14 12:02:08,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:08,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:08,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:08,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:02:08,154 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:02:08,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:08,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1822221483, now seen corresponding path program 9 times [2024-06-14 12:02:08,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:08,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387907794] [2024-06-14 12:02:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:08,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:09,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:09,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387907794] [2024-06-14 12:02:09,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387907794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:09,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:09,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:02:09,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628626698] [2024-06-14 12:02:09,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:09,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:02:09,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:02:09,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:02:09,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:02:09,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 203 transitions, 2039 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:09,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:09,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:02:09,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:13,004 INFO L124 PetriNetUnfolderBase]: 12061/17115 cut-off events. [2024-06-14 12:02:13,004 INFO L125 PetriNetUnfolderBase]: For 1141240/1141472 co-relation queries the response was YES. [2024-06-14 12:02:13,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135433 conditions, 17115 events. 12061/17115 cut-off events. For 1141240/1141472 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 100530 event pairs, 4811 based on Foata normal form. 104/17192 useless extension candidates. Maximal degree in co-relation 135366. Up to 16021 conditions per place. [2024-06-14 12:02:13,186 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 155 selfloop transitions, 89 changer transitions 0/254 dead transitions. [2024-06-14 12:02:13,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 254 transitions, 2795 flow [2024-06-14 12:02:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:02:13,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:02:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-14 12:02:13,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:02:13,188 INFO L175 Difference]: Start difference. First operand has 155 places, 203 transitions, 2039 flow. Second operand 9 states and 243 transitions. [2024-06-14 12:02:13,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 254 transitions, 2795 flow [2024-06-14 12:02:13,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 254 transitions, 2553 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 12:02:13,706 INFO L231 Difference]: Finished difference. Result has 157 places, 205 transitions, 2087 flow [2024-06-14 12:02:13,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2087, PETRI_PLACES=157, PETRI_TRANSITIONS=205} [2024-06-14 12:02:13,707 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 100 predicate places. [2024-06-14 12:02:13,707 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 205 transitions, 2087 flow [2024-06-14 12:02:13,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:13,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:13,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:13,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:02:13,708 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:02:13,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:13,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1816711233, now seen corresponding path program 10 times [2024-06-14 12:02:13,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:13,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639643635] [2024-06-14 12:02:13,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:13,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:14,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:14,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639643635] [2024-06-14 12:02:14,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639643635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:14,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:14,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:02:14,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944358410] [2024-06-14 12:02:14,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:14,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:02:14,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:14,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:02:14,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:02:15,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:02:15,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 205 transitions, 2087 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:15,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:15,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:02:15,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand