./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix039.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/mix039.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix039.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix039.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:20:46,755 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:20:46,808 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:20:46,812 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:20:46,813 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:20:46,834 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:20:46,836 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:20:46,837 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:20:46,837 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:20:46,840 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:20:46,840 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:20:46,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:20:46,841 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:20:46,842 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:20:46,843 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:20:46,843 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:20:46,843 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:20:46,843 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:20:46,844 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:20:46,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:20:46,844 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:20:46,844 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:20:46,845 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:20:46,845 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:20:46,845 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:20:46,845 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:20:46,845 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:20:46,846 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:20:46,846 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:20:46,846 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:20:46,847 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:20:46,847 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:20:46,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:20:46,848 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:20:46,848 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:20:46,848 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:20:46,848 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:20:46,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:20:46,849 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:20:46,849 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:20:46,849 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:20:46,849 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:20:46,849 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:20:46,850 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:20:47,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:20:47,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:20:47,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:20:47,088 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:20:47,090 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:20:47,090 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix039.opt.i [2024-06-20 16:20:48,160 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:20:48,410 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:20:48,411 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix039.opt.i [2024-06-20 16:20:48,427 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4181b9951/a02ad1608d9249c18d3bac2c38b3bc7d/FLAG07e524f44 [2024-06-20 16:20:48,437 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4181b9951/a02ad1608d9249c18d3bac2c38b3bc7d [2024-06-20 16:20:48,439 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:20:48,440 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:20:48,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix039.opt.yml/witness.yml [2024-06-20 16:20:48,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:20:48,610 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:20:48,612 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:20:48,612 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:20:48,615 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:20:48,616 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:20:48" (1/2) ... [2024-06-20 16:20:48,617 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3abf0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:20:48, skipping insertion in model container [2024-06-20 16:20:48,617 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:20:48" (1/2) ... [2024-06-20 16:20:48,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@46330bba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:20:48, skipping insertion in model container [2024-06-20 16:20:48,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:20:48" (2/2) ... [2024-06-20 16:20:48,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3abf0cd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:48, skipping insertion in model container [2024-06-20 16:20:48,619 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:20:48" (2/2) ... [2024-06-20 16:20:48,619 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:20:48,722 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:20:48,723 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-20 16:20:48,723 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-20 16:20:48,723 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-20 16:20:48,724 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-20 16:20:48,724 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:20:48,725 INFO L106 edCorrectnessWitness]: ghost_update [L857-L857] multithreaded = 1; [2024-06-20 16:20:48,761 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:20:49,047 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:20:49,054 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:20:49,226 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:20:49,261 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:20:49,262 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:49 WrapperNode [2024-06-20 16:20:49,262 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:20:49,263 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:20:49,263 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:20:49,264 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:20:49,268 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 20.06 04:20:49" (1/1) ... [2024-06-20 16:20:49,295 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 20.06 04:20:49" (1/1) ... [2024-06-20 16:20:49,329 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 146 [2024-06-20 16:20:49,330 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:20:49,330 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:20:49,330 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:20:49,330 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:20:49,339 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:49" (1/1) ... [2024-06-20 16:20:49,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:49" (1/1) ... [2024-06-20 16:20:49,342 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:49" (1/1) ... [2024-06-20 16:20:49,359 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:20:49,359 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:49" (1/1) ... [2024-06-20 16:20:49,360 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:49" (1/1) ... [2024-06-20 16:20:49,367 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:49" (1/1) ... [2024-06-20 16:20:49,369 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:49" (1/1) ... [2024-06-20 16:20:49,370 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:49" (1/1) ... [2024-06-20 16:20:49,372 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:49" (1/1) ... [2024-06-20 16:20:49,374 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:20:49,375 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:20:49,375 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:20:49,375 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:20:49,376 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:49" (1/1) ... [2024-06-20 16:20:49,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:20:49,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:20:49,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:20:49,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:20:49,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:20:49,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:20:49,429 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:20:49,429 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:20:49,429 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:20:49,429 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:20:49,429 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:20:49,429 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:20:49,430 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:20:49,430 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:20:49,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:20:49,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:20:49,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:20:49,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:20:49,431 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:20:49,553 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:20:49,555 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:20:49,936 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:20:49,936 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:20:50,099 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:20:50,099 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:20:50,099 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:20:50 BoogieIcfgContainer [2024-06-20 16:20:50,099 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:20:50,102 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:20:50,102 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:20:50,104 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:20:50,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:20:48" (1/4) ... [2024-06-20 16:20:50,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3963f945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:20:50, skipping insertion in model container [2024-06-20 16:20:50,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:20:48" (2/4) ... [2024-06-20 16:20:50,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3963f945 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:20:50, skipping insertion in model container [2024-06-20 16:20:50,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:49" (3/4) ... [2024-06-20 16:20:50,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3963f945 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:20:50, skipping insertion in model container [2024-06-20 16:20:50,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:20:50" (4/4) ... [2024-06-20 16:20:50,110 INFO L112 eAbstractionObserver]: Analyzing ICFG mix039.opt.i [2024-06-20 16:20:50,123 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:20:50,123 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:20:50,123 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:20:50,165 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:20:50,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-20 16:20:50,224 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-20 16:20:50,224 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:20:50,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:20:50,227 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-20 16:20:50,231 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-20 16:20:50,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:20:50,274 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;@26725605, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:20:50,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:20:50,278 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:20:50,279 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:20:50,279 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:20:50,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:50,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:20:50,280 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)] === [2024-06-20 16:20:50,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:50,283 INFO L85 PathProgramCache]: Analyzing trace with hash 384691786, now seen corresponding path program 1 times [2024-06-20 16:20:50,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:50,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145288959] [2024-06-20 16:20:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:50,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:51,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:51,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145288959] [2024-06-20 16:20:51,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145288959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:51,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:51,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:20:51,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655422023] [2024-06-20 16:20:51,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:51,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:20:51,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:51,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:20:51,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:20:51,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-06-20 16:20:51,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:51,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:51,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-06-20 16:20:51,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:52,509 INFO L124 PetriNetUnfolderBase]: 6197/8949 cut-off events. [2024-06-20 16:20:52,510 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-06-20 16:20:52,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17695 conditions, 8949 events. 6197/8949 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 51807 event pairs, 4558 based on Foata normal form. 1/8642 useless extension candidates. Maximal degree in co-relation 17682. Up to 8479 conditions per place. [2024-06-20 16:20:52,560 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 41 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-20 16:20:52,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 227 flow [2024-06-20 16:20:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:20:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:20:52,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-20 16:20:52,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6540880503144654 [2024-06-20 16:20:52,571 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 104 transitions. [2024-06-20 16:20:52,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 227 flow [2024-06-20 16:20:52,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:20:52,579 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-20 16:20:52,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-20 16:20:52,583 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-20 16:20:52,583 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-20 16:20:52,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:52,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:52,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:52,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:20:52,585 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)] === [2024-06-20 16:20:52,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:52,585 INFO L85 PathProgramCache]: Analyzing trace with hash 323025033, now seen corresponding path program 1 times [2024-06-20 16:20:52,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:52,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578981578] [2024-06-20 16:20:52,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:52,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:53,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:53,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578981578] [2024-06-20 16:20:53,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578981578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:53,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:53,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:20:53,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723351922] [2024-06-20 16:20:53,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:53,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:20:53,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:53,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:20:53,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:20:53,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-20 16:20:53,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:53,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:53,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-20 16:20:53,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:54,409 INFO L124 PetriNetUnfolderBase]: 7092/9982 cut-off events. [2024-06-20 16:20:54,409 INFO L125 PetriNetUnfolderBase]: For 1997/1997 co-relation queries the response was YES. [2024-06-20 16:20:54,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22709 conditions, 9982 events. 7092/9982 cut-off events. For 1997/1997 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 56301 event pairs, 4490 based on Foata normal form. 4/9825 useless extension candidates. Maximal degree in co-relation 22697. Up to 9649 conditions per place. [2024-06-20 16:20:54,468 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 52 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-20 16:20:54,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 321 flow [2024-06-20 16:20:54,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:20:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:20:54,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-06-20 16:20:54,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273584905660378 [2024-06-20 16:20:54,470 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 133 transitions. [2024-06-20 16:20:54,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 321 flow [2024-06-20 16:20:54,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:20:54,473 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-20 16:20:54,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-20 16:20:54,474 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-20 16:20:54,474 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-20 16:20:54,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:54,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:54,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:54,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:20:54,475 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)] === [2024-06-20 16:20:54,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:54,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1782198516, now seen corresponding path program 1 times [2024-06-20 16:20:54,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:54,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597761409] [2024-06-20 16:20:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:54,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:55,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:55,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597761409] [2024-06-20 16:20:55,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597761409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:55,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:55,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:20:55,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339542320] [2024-06-20 16:20:55,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:55,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:20:55,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:55,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:20:55,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:20:55,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-20 16:20:55,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:55,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:55,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-20 16:20:55,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:56,887 INFO L124 PetriNetUnfolderBase]: 9006/12594 cut-off events. [2024-06-20 16:20:56,888 INFO L125 PetriNetUnfolderBase]: For 6795/6795 co-relation queries the response was YES. [2024-06-20 16:20:56,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31737 conditions, 12594 events. 9006/12594 cut-off events. For 6795/6795 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 69754 event pairs, 4478 based on Foata normal form. 8/12399 useless extension candidates. Maximal degree in co-relation 31723. Up to 12137 conditions per place. [2024-06-20 16:20:56,951 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 70 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-20 16:20:56,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 486 flow [2024-06-20 16:20:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:20:56,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:20:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-20 16:20:56,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849056603773585 [2024-06-20 16:20:56,953 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 186 transitions. [2024-06-20 16:20:56,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 486 flow [2024-06-20 16:20:56,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 458 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-20 16:20:56,956 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-20 16:20:56,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-20 16:20:56,957 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-20 16:20:56,957 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-20 16:20:56,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:56,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:56,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:56,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:20:56,958 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)] === [2024-06-20 16:20:56,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:56,959 INFO L85 PathProgramCache]: Analyzing trace with hash -288351049, now seen corresponding path program 1 times [2024-06-20 16:20:56,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:56,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029266730] [2024-06-20 16:20:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:56,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:57,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:57,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029266730] [2024-06-20 16:20:57,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029266730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:57,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:57,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:20:57,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032183970] [2024-06-20 16:20:57,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:57,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:20:57,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:20:57,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:20:58,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:20:58,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:58,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:58,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:20:58,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:59,387 INFO L124 PetriNetUnfolderBase]: 7847/11280 cut-off events. [2024-06-20 16:20:59,387 INFO L125 PetriNetUnfolderBase]: For 11293/11293 co-relation queries the response was YES. [2024-06-20 16:20:59,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31080 conditions, 11280 events. 7847/11280 cut-off events. For 11293/11293 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 64605 event pairs, 4266 based on Foata normal form. 3/11080 useless extension candidates. Maximal degree in co-relation 31063. Up to 10669 conditions per place. [2024-06-20 16:20:59,457 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 59 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-20 16:20:59,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 447 flow [2024-06-20 16:20:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:20:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:20:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-20 16:20:59,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132075471698113 [2024-06-20 16:20:59,459 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 136 transitions. [2024-06-20 16:20:59,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 447 flow [2024-06-20 16:20:59,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 409 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 16:20:59,464 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-20 16:20:59,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-20 16:20:59,465 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-20 16:20:59,465 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-20 16:20:59,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:59,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:59,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:59,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:20:59,466 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)] === [2024-06-20 16:20:59,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:59,467 INFO L85 PathProgramCache]: Analyzing trace with hash -361458903, now seen corresponding path program 1 times [2024-06-20 16:20:59,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:59,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89670748] [2024-06-20 16:20:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:59,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:00,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:00,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89670748] [2024-06-20 16:21:00,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89670748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:00,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:00,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:21:00,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728078836] [2024-06-20 16:21:00,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:00,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:21:00,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:00,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:21:00,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:21:00,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:21:00,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:00,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:00,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:21:00,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:01,755 INFO L124 PetriNetUnfolderBase]: 7880/11630 cut-off events. [2024-06-20 16:21:01,755 INFO L125 PetriNetUnfolderBase]: For 17923/17923 co-relation queries the response was YES. [2024-06-20 16:21:01,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34282 conditions, 11630 events. 7880/11630 cut-off events. For 17923/17923 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 69472 event pairs, 4072 based on Foata normal form. 7/11599 useless extension candidates. Maximal degree in co-relation 34263. Up to 10583 conditions per place. [2024-06-20 16:21:01,816 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 75 selfloop transitions, 22 changer transitions 0/106 dead transitions. [2024-06-20 16:21:01,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 106 transitions, 648 flow [2024-06-20 16:21:01,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:21:01,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:21:01,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-20 16:21:01,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440251572327044 [2024-06-20 16:21:01,818 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 173 transitions. [2024-06-20 16:21:01,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 106 transitions, 648 flow [2024-06-20 16:21:01,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 619 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:21:01,823 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 407 flow [2024-06-20 16:21:01,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=407, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-20 16:21:01,824 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-20 16:21:01,824 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 407 flow [2024-06-20 16:21:01,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:01,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:01,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:01,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:21:01,825 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)] === [2024-06-20 16:21:01,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:01,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1534100530, now seen corresponding path program 1 times [2024-06-20 16:21:01,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:01,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334119566] [2024-06-20 16:21:01,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:01,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:02,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:02,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334119566] [2024-06-20 16:21:02,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334119566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:02,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:02,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:21:02,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235200180] [2024-06-20 16:21:02,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:02,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:21:02,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:02,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:21:02,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:21:02,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:02,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 407 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:02,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:02,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:02,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:04,243 INFO L124 PetriNetUnfolderBase]: 9052/12861 cut-off events. [2024-06-20 16:21:04,243 INFO L125 PetriNetUnfolderBase]: For 33928/33940 co-relation queries the response was YES. [2024-06-20 16:21:04,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43822 conditions, 12861 events. 9052/12861 cut-off events. For 33928/33940 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 72963 event pairs, 4652 based on Foata normal form. 11/12849 useless extension candidates. Maximal degree in co-relation 43800. Up to 12214 conditions per place. [2024-06-20 16:21:04,427 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 84 selfloop transitions, 21 changer transitions 0/113 dead transitions. [2024-06-20 16:21:04,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 113 transitions, 791 flow [2024-06-20 16:21:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:21:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:21:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-20 16:21:04,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-20 16:21:04,432 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 407 flow. Second operand 6 states and 165 transitions. [2024-06-20 16:21:04,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 113 transitions, 791 flow [2024-06-20 16:21:04,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 769 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-20 16:21:04,440 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 514 flow [2024-06-20 16:21:04,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=514, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-20 16:21:04,441 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-20 16:21:04,441 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 514 flow [2024-06-20 16:21:04,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:04,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:04,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:04,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:21:04,442 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)] === [2024-06-20 16:21:04,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:04,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2080954004, now seen corresponding path program 2 times [2024-06-20 16:21:04,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:04,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588877047] [2024-06-20 16:21:04,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:04,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:05,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:05,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588877047] [2024-06-20 16:21:05,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588877047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:05,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:05,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:21:05,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494835446] [2024-06-20 16:21:05,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:05,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:21:05,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:05,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:21:05,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:21:05,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:05,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 514 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:05,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:05,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:05,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:06,898 INFO L124 PetriNetUnfolderBase]: 9043/12850 cut-off events. [2024-06-20 16:21:06,898 INFO L125 PetriNetUnfolderBase]: For 45609/45618 co-relation queries the response was YES. [2024-06-20 16:21:06,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46938 conditions, 12850 events. 9043/12850 cut-off events. For 45609/45618 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 72917 event pairs, 4655 based on Foata normal form. 9/12835 useless extension candidates. Maximal degree in co-relation 46913. Up to 12205 conditions per place. [2024-06-20 16:21:06,976 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 78 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-20 16:21:06,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 774 flow [2024-06-20 16:21:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:21:06,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:21:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 16:21:06,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:21:06,978 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 514 flow. Second operand 6 states and 159 transitions. [2024-06-20 16:21:06,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 774 flow [2024-06-20 16:21:07,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 107 transitions, 716 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-20 16:21:07,003 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 509 flow [2024-06-20 16:21:07,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=509, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-20 16:21:07,004 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-20 16:21:07,004 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 509 flow [2024-06-20 16:21:07,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:07,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:07,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:07,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:21:07,005 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)] === [2024-06-20 16:21:07,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:07,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1635760186, now seen corresponding path program 1 times [2024-06-20 16:21:07,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:07,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94367811] [2024-06-20 16:21:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:07,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:08,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:08,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94367811] [2024-06-20 16:21:08,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94367811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:08,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:08,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:08,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812526548] [2024-06-20 16:21:08,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:08,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:08,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:08,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:08,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:08,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:08,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 509 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:08,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:08,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:08,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:09,789 INFO L124 PetriNetUnfolderBase]: 9134/12988 cut-off events. [2024-06-20 16:21:09,789 INFO L125 PetriNetUnfolderBase]: For 51140/51144 co-relation queries the response was YES. [2024-06-20 16:21:09,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47870 conditions, 12988 events. 9134/12988 cut-off events. For 51140/51144 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 73580 event pairs, 4645 based on Foata normal form. 7/12974 useless extension candidates. Maximal degree in co-relation 47843. Up to 12307 conditions per place. [2024-06-20 16:21:09,863 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 102 selfloop transitions, 32 changer transitions 0/142 dead transitions. [2024-06-20 16:21:09,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 142 transitions, 1004 flow [2024-06-20 16:21:09,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:21:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:21:09,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-20 16:21:09,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-20 16:21:09,865 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 509 flow. Second operand 8 states and 214 transitions. [2024-06-20 16:21:09,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 142 transitions, 1004 flow [2024-06-20 16:21:09,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 142 transitions, 930 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:21:09,888 INFO L231 Difference]: Finished difference. Result has 82 places, 102 transitions, 667 flow [2024-06-20 16:21:09,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=667, PETRI_PLACES=82, PETRI_TRANSITIONS=102} [2024-06-20 16:21:09,889 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-06-20 16:21:09,889 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 102 transitions, 667 flow [2024-06-20 16:21:09,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:09,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:09,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:09,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:21:09,889 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)] === [2024-06-20 16:21:09,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:09,890 INFO L85 PathProgramCache]: Analyzing trace with hash 312357262, now seen corresponding path program 2 times [2024-06-20 16:21:09,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:09,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191855069] [2024-06-20 16:21:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:09,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:10,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:10,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191855069] [2024-06-20 16:21:10,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191855069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:10,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:10,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:10,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317396939] [2024-06-20 16:21:10,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:10,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:10,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:10,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:10,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:11,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:11,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 102 transitions, 667 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:11,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:11,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:11,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:12,566 INFO L124 PetriNetUnfolderBase]: 9156/13024 cut-off events. [2024-06-20 16:21:12,567 INFO L125 PetriNetUnfolderBase]: For 65400/65408 co-relation queries the response was YES. [2024-06-20 16:21:12,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51435 conditions, 13024 events. 9156/13024 cut-off events. For 65400/65408 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 73728 event pairs, 4503 based on Foata normal form. 11/13012 useless extension candidates. Maximal degree in co-relation 51406. Up to 12314 conditions per place. [2024-06-20 16:21:12,653 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 102 selfloop transitions, 34 changer transitions 0/144 dead transitions. [2024-06-20 16:21:12,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 144 transitions, 1115 flow [2024-06-20 16:21:12,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-20 16:21:12,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-20 16:21:12,654 INFO L175 Difference]: Start difference. First operand has 82 places, 102 transitions, 667 flow. Second operand 7 states and 188 transitions. [2024-06-20 16:21:12,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 144 transitions, 1115 flow [2024-06-20 16:21:12,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 144 transitions, 1051 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 16:21:12,686 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 744 flow [2024-06-20 16:21:12,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-20 16:21:12,687 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-20 16:21:12,687 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 744 flow [2024-06-20 16:21:12,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:12,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:12,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:12,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:21:12,688 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)] === [2024-06-20 16:21:12,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:12,688 INFO L85 PathProgramCache]: Analyzing trace with hash 353008240, now seen corresponding path program 3 times [2024-06-20 16:21:12,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:12,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107318239] [2024-06-20 16:21:12,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:12,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:13,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:13,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107318239] [2024-06-20 16:21:13,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107318239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:13,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:13,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:13,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909327391] [2024-06-20 16:21:13,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:13,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:13,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:13,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:13,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:13,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:13,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 744 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:13,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:13,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:13,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:15,241 INFO L124 PetriNetUnfolderBase]: 9178/13065 cut-off events. [2024-06-20 16:21:15,241 INFO L125 PetriNetUnfolderBase]: For 82655/82669 co-relation queries the response was YES. [2024-06-20 16:21:15,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54813 conditions, 13065 events. 9178/13065 cut-off events. For 82655/82669 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 74045 event pairs, 4516 based on Foata normal form. 11/13051 useless extension candidates. Maximal degree in co-relation 54783. Up to 12258 conditions per place. [2024-06-20 16:21:15,332 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 92 selfloop transitions, 50 changer transitions 0/150 dead transitions. [2024-06-20 16:21:15,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 150 transitions, 1304 flow [2024-06-20 16:21:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-20 16:21:15,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175202156334232 [2024-06-20 16:21:15,334 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 744 flow. Second operand 7 states and 192 transitions. [2024-06-20 16:21:15,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 150 transitions, 1304 flow [2024-06-20 16:21:15,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 150 transitions, 1179 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 16:21:15,379 INFO L231 Difference]: Finished difference. Result has 88 places, 114 transitions, 856 flow [2024-06-20 16:21:15,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=856, PETRI_PLACES=88, PETRI_TRANSITIONS=114} [2024-06-20 16:21:15,380 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-20 16:21:15,380 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 114 transitions, 856 flow [2024-06-20 16:21:15,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:15,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:15,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:15,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:21:15,381 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)] === [2024-06-20 16:21:15,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:15,382 INFO L85 PathProgramCache]: Analyzing trace with hash 353008426, now seen corresponding path program 1 times [2024-06-20 16:21:15,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:15,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975778444] [2024-06-20 16:21:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:15,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:16,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:16,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975778444] [2024-06-20 16:21:16,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975778444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:16,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:16,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:16,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241454204] [2024-06-20 16:21:16,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:16,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:16,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:16,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:16,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:16,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:16,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 114 transitions, 856 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:16,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:16,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:16,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:18,117 INFO L124 PetriNetUnfolderBase]: 9334/13280 cut-off events. [2024-06-20 16:21:18,117 INFO L125 PetriNetUnfolderBase]: For 84703/84717 co-relation queries the response was YES. [2024-06-20 16:21:18,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55714 conditions, 13280 events. 9334/13280 cut-off events. For 84703/84717 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 75106 event pairs, 4186 based on Foata normal form. 16/13257 useless extension candidates. Maximal degree in co-relation 55683. Up to 12170 conditions per place. [2024-06-20 16:21:18,204 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 127 selfloop transitions, 43 changer transitions 0/178 dead transitions. [2024-06-20 16:21:18,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 178 transitions, 1626 flow [2024-06-20 16:21:18,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:18,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-20 16:21:18,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525606469002695 [2024-06-20 16:21:18,206 INFO L175 Difference]: Start difference. First operand has 88 places, 114 transitions, 856 flow. Second operand 7 states and 205 transitions. [2024-06-20 16:21:18,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 178 transitions, 1626 flow [2024-06-20 16:21:18,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 178 transitions, 1555 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 16:21:18,263 INFO L231 Difference]: Finished difference. Result has 94 places, 129 transitions, 1058 flow [2024-06-20 16:21:18,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1058, PETRI_PLACES=94, PETRI_TRANSITIONS=129} [2024-06-20 16:21:18,264 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-20 16:21:18,264 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 129 transitions, 1058 flow [2024-06-20 16:21:18,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:18,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:18,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:18,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:21:18,265 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)] === [2024-06-20 16:21:18,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:18,265 INFO L85 PathProgramCache]: Analyzing trace with hash 85303078, now seen corresponding path program 2 times [2024-06-20 16:21:18,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:18,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938115647] [2024-06-20 16:21:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:18,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:19,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:19,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938115647] [2024-06-20 16:21:19,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938115647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:19,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:19,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:19,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825546072] [2024-06-20 16:21:19,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:19,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:19,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:19,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:19,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:19,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:19,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 129 transitions, 1058 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:19,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:19,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:19,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:21,196 INFO L124 PetriNetUnfolderBase]: 9444/13442 cut-off events. [2024-06-20 16:21:21,196 INFO L125 PetriNetUnfolderBase]: For 109677/109698 co-relation queries the response was YES. [2024-06-20 16:21:21,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62037 conditions, 13442 events. 9444/13442 cut-off events. For 109677/109698 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 75994 event pairs, 4143 based on Foata normal form. 21/13428 useless extension candidates. Maximal degree in co-relation 62002. Up to 12270 conditions per place. [2024-06-20 16:21:21,277 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 121 selfloop transitions, 59 changer transitions 0/188 dead transitions. [2024-06-20 16:21:21,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 188 transitions, 1869 flow [2024-06-20 16:21:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:21,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-20 16:21:21,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5417789757412399 [2024-06-20 16:21:21,279 INFO L175 Difference]: Start difference. First operand has 94 places, 129 transitions, 1058 flow. Second operand 7 states and 201 transitions. [2024-06-20 16:21:21,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 188 transitions, 1869 flow [2024-06-20 16:21:21,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 188 transitions, 1781 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-20 16:21:21,335 INFO L231 Difference]: Finished difference. Result has 100 places, 143 transitions, 1308 flow [2024-06-20 16:21:21,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1308, PETRI_PLACES=100, PETRI_TRANSITIONS=143} [2024-06-20 16:21:21,336 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-06-20 16:21:21,336 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 143 transitions, 1308 flow [2024-06-20 16:21:21,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:21,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:21,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:21,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:21:21,337 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)] === [2024-06-20 16:21:21,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:21,337 INFO L85 PathProgramCache]: Analyzing trace with hash 530139946, now seen corresponding path program 3 times [2024-06-20 16:21:21,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:21,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647001164] [2024-06-20 16:21:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:21,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:22,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:22,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647001164] [2024-06-20 16:21:22,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647001164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:22,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:22,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:22,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396699965] [2024-06-20 16:21:22,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:22,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:22,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:22,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:22,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:22,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:22,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 143 transitions, 1308 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:22,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:22,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:22,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:24,004 INFO L124 PetriNetUnfolderBase]: 9431/13426 cut-off events. [2024-06-20 16:21:24,004 INFO L125 PetriNetUnfolderBase]: For 128426/128447 co-relation queries the response was YES. [2024-06-20 16:21:24,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64653 conditions, 13426 events. 9431/13426 cut-off events. For 128426/128447 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 76038 event pairs, 4157 based on Foata normal form. 21/13412 useless extension candidates. Maximal degree in co-relation 64615. Up to 12263 conditions per place. [2024-06-20 16:21:24,106 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 125 selfloop transitions, 54 changer transitions 0/187 dead transitions. [2024-06-20 16:21:24,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 187 transitions, 1934 flow [2024-06-20 16:21:24,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:24,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:24,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-20 16:21:24,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390835579514824 [2024-06-20 16:21:24,107 INFO L175 Difference]: Start difference. First operand has 100 places, 143 transitions, 1308 flow. Second operand 7 states and 200 transitions. [2024-06-20 16:21:24,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 187 transitions, 1934 flow [2024-06-20 16:21:24,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 187 transitions, 1864 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-20 16:21:24,239 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1359 flow [2024-06-20 16:21:24,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1359, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-20 16:21:24,239 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-20 16:21:24,240 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1359 flow [2024-06-20 16:21:24,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:24,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:24,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:24,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:21:24,240 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)] === [2024-06-20 16:21:24,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:24,241 INFO L85 PathProgramCache]: Analyzing trace with hash 317118862, now seen corresponding path program 4 times [2024-06-20 16:21:24,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:24,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583225530] [2024-06-20 16:21:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:24,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:25,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:25,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583225530] [2024-06-20 16:21:25,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583225530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:25,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:25,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:25,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856672538] [2024-06-20 16:21:25,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:25,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:25,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:25,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:25,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:25,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:25,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1359 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:25,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:25,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:25,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:26,900 INFO L124 PetriNetUnfolderBase]: 9422/13432 cut-off events. [2024-06-20 16:21:26,900 INFO L125 PetriNetUnfolderBase]: For 134321/134323 co-relation queries the response was YES. [2024-06-20 16:21:26,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64851 conditions, 13432 events. 9422/13432 cut-off events. For 134321/134323 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 76386 event pairs, 4352 based on Foata normal form. 3/13393 useless extension candidates. Maximal degree in co-relation 64810. Up to 12585 conditions per place. [2024-06-20 16:21:27,010 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 116 selfloop transitions, 50 changer transitions 0/174 dead transitions. [2024-06-20 16:21:27,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 174 transitions, 1789 flow [2024-06-20 16:21:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 16:21:27,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2024-06-20 16:21:27,012 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1359 flow. Second operand 7 states and 186 transitions. [2024-06-20 16:21:27,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 174 transitions, 1789 flow [2024-06-20 16:21:27,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 174 transitions, 1628 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 16:21:27,117 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1309 flow [2024-06-20 16:21:27,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1309, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-20 16:21:27,118 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-20 16:21:27,118 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1309 flow [2024-06-20 16:21:27,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:27,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:27,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:27,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:21:27,119 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:21:27,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:27,119 INFO L85 PathProgramCache]: Analyzing trace with hash 530386024, now seen corresponding path program 1 times [2024-06-20 16:21:27,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:27,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797550501] [2024-06-20 16:21:27,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:27,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:28,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:28,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797550501] [2024-06-20 16:21:28,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797550501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:28,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:28,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:28,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923222595] [2024-06-20 16:21:28,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:28,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:28,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:28,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:28,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:28,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:21:28,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1309 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:28,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:28,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:21:28,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:29,710 INFO L124 PetriNetUnfolderBase]: 8418/12450 cut-off events. [2024-06-20 16:21:29,711 INFO L125 PetriNetUnfolderBase]: For 128411/128413 co-relation queries the response was YES. [2024-06-20 16:21:29,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59347 conditions, 12450 events. 8418/12450 cut-off events. For 128411/128413 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 74555 event pairs, 3568 based on Foata normal form. 26/12439 useless extension candidates. Maximal degree in co-relation 59307. Up to 11139 conditions per place. [2024-06-20 16:21:29,792 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 155 selfloop transitions, 25 changer transitions 0/189 dead transitions. [2024-06-20 16:21:29,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 1953 flow [2024-06-20 16:21:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-20 16:21:29,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471698113207547 [2024-06-20 16:21:29,794 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1309 flow. Second operand 7 states and 203 transitions. [2024-06-20 16:21:29,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 1953 flow [2024-06-20 16:21:29,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 189 transitions, 1819 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:21:29,893 INFO L231 Difference]: Finished difference. Result has 107 places, 146 transitions, 1292 flow [2024-06-20 16:21:29,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1292, PETRI_PLACES=107, PETRI_TRANSITIONS=146} [2024-06-20 16:21:29,894 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-20 16:21:29,894 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 146 transitions, 1292 flow [2024-06-20 16:21:29,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:29,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:29,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:29,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:21:29,895 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:21:29,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:29,895 INFO L85 PathProgramCache]: Analyzing trace with hash -164903164, now seen corresponding path program 1 times [2024-06-20 16:21:29,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:29,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919062] [2024-06-20 16:21:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:29,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:30,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:30,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919062] [2024-06-20 16:21:30,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:30,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:30,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:21:30,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833324151] [2024-06-20 16:21:30,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:30,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:21:30,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:30,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:21:30,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:21:30,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-20 16:21:30,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 146 transitions, 1292 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:30,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:30,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-20 16:21:30,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:31,994 INFO L124 PetriNetUnfolderBase]: 7960/11988 cut-off events. [2024-06-20 16:21:31,994 INFO L125 PetriNetUnfolderBase]: For 141320/141337 co-relation queries the response was YES. [2024-06-20 16:21:32,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59317 conditions, 11988 events. 7960/11988 cut-off events. For 141320/141337 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 73844 event pairs, 3697 based on Foata normal form. 19/11981 useless extension candidates. Maximal degree in co-relation 59276. Up to 10734 conditions per place. [2024-06-20 16:21:32,101 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 131 selfloop transitions, 10 changer transitions 0/161 dead transitions. [2024-06-20 16:21:32,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 161 transitions, 1620 flow [2024-06-20 16:21:32,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:21:32,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:21:32,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-20 16:21:32,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5169811320754717 [2024-06-20 16:21:32,103 INFO L175 Difference]: Start difference. First operand has 107 places, 146 transitions, 1292 flow. Second operand 5 states and 137 transitions. [2024-06-20 16:21:32,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 161 transitions, 1620 flow [2024-06-20 16:21:32,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 161 transitions, 1525 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 16:21:32,206 INFO L231 Difference]: Finished difference. Result has 107 places, 146 transitions, 1226 flow [2024-06-20 16:21:32,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1226, PETRI_PLACES=107, PETRI_TRANSITIONS=146} [2024-06-20 16:21:32,207 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-20 16:21:32,208 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 146 transitions, 1226 flow [2024-06-20 16:21:32,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:32,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:32,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:32,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:21:32,211 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)] === [2024-06-20 16:21:32,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:32,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1945364274, now seen corresponding path program 1 times [2024-06-20 16:21:32,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:32,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045651010] [2024-06-20 16:21:32,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:32,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:33,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:33,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045651010] [2024-06-20 16:21:33,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045651010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:33,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:33,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:21:33,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351832231] [2024-06-20 16:21:33,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:33,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:21:33,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:33,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:21:33,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:21:33,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:33,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 146 transitions, 1226 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:33,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:33,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:33,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:35,100 INFO L124 PetriNetUnfolderBase]: 9710/13837 cut-off events. [2024-06-20 16:21:35,100 INFO L125 PetriNetUnfolderBase]: For 179137/179145 co-relation queries the response was YES. [2024-06-20 16:21:35,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69830 conditions, 13837 events. 9710/13837 cut-off events. For 179137/179145 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 78963 event pairs, 4156 based on Foata normal form. 15/13817 useless extension candidates. Maximal degree in co-relation 69788. Up to 12842 conditions per place. [2024-06-20 16:21:35,209 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 160 selfloop transitions, 48 changer transitions 0/216 dead transitions. [2024-06-20 16:21:35,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 216 transitions, 2162 flow [2024-06-20 16:21:35,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:21:35,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:21:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-20 16:21:35,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424528301886793 [2024-06-20 16:21:35,227 INFO L175 Difference]: Start difference. First operand has 107 places, 146 transitions, 1226 flow. Second operand 8 states and 230 transitions. [2024-06-20 16:21:35,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 216 transitions, 2162 flow [2024-06-20 16:21:35,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 216 transitions, 2133 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 16:21:35,335 INFO L231 Difference]: Finished difference. Result has 113 places, 160 transitions, 1521 flow [2024-06-20 16:21:35,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1521, PETRI_PLACES=113, PETRI_TRANSITIONS=160} [2024-06-20 16:21:35,335 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-20 16:21:35,336 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 160 transitions, 1521 flow [2024-06-20 16:21:35,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:35,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:35,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:35,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:21:35,336 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)] === [2024-06-20 16:21:35,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:35,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1941639624, now seen corresponding path program 2 times [2024-06-20 16:21:35,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:35,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031507387] [2024-06-20 16:21:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:35,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:36,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:36,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031507387] [2024-06-20 16:21:36,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031507387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:36,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:36,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:21:36,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710147660] [2024-06-20 16:21:36,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:36,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:21:36,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:36,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:21:36,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:21:36,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:36,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 160 transitions, 1521 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:36,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:36,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:36,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:38,492 INFO L124 PetriNetUnfolderBase]: 9943/14221 cut-off events. [2024-06-20 16:21:38,492 INFO L125 PetriNetUnfolderBase]: For 219819/219824 co-relation queries the response was YES. [2024-06-20 16:21:38,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77313 conditions, 14221 events. 9943/14221 cut-off events. For 219819/219824 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 81675 event pairs, 3981 based on Foata normal form. 7/14185 useless extension candidates. Maximal degree in co-relation 77269. Up to 12358 conditions per place. [2024-06-20 16:21:38,634 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 130 selfloop transitions, 98 changer transitions 0/236 dead transitions. [2024-06-20 16:21:38,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 236 transitions, 2755 flow [2024-06-20 16:21:38,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:21:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:21:38,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-20 16:21:38,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613207547169812 [2024-06-20 16:21:38,636 INFO L175 Difference]: Start difference. First operand has 113 places, 160 transitions, 1521 flow. Second operand 8 states and 238 transitions. [2024-06-20 16:21:38,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 236 transitions, 2755 flow [2024-06-20 16:21:38,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 236 transitions, 2612 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-20 16:21:38,799 INFO L231 Difference]: Finished difference. Result has 119 places, 179 transitions, 1924 flow [2024-06-20 16:21:38,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1924, PETRI_PLACES=119, PETRI_TRANSITIONS=179} [2024-06-20 16:21:38,800 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-20 16:21:38,800 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 179 transitions, 1924 flow [2024-06-20 16:21:38,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:38,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:38,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:38,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:21:38,801 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)] === [2024-06-20 16:21:38,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:38,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1941645204, now seen corresponding path program 3 times [2024-06-20 16:21:38,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:38,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674449664] [2024-06-20 16:21:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:38,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:39,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:39,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674449664] [2024-06-20 16:21:39,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674449664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:39,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:39,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:21:39,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759338909] [2024-06-20 16:21:39,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:39,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:21:39,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:39,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:21:39,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:21:39,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:39,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 179 transitions, 1924 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:39,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:39,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:39,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:41,963 INFO L124 PetriNetUnfolderBase]: 9930/14205 cut-off events. [2024-06-20 16:21:41,963 INFO L125 PetriNetUnfolderBase]: For 260631/260636 co-relation queries the response was YES. [2024-06-20 16:21:42,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82897 conditions, 14205 events. 9930/14205 cut-off events. For 260631/260636 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 81644 event pairs, 3995 based on Foata normal form. 7/14169 useless extension candidates. Maximal degree in co-relation 82850. Up to 12351 conditions per place. [2024-06-20 16:21:42,092 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 135 selfloop transitions, 92 changer transitions 0/235 dead transitions. [2024-06-20 16:21:42,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 235 transitions, 2882 flow [2024-06-20 16:21:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:21:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:21:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-20 16:21:42,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5589622641509434 [2024-06-20 16:21:42,094 INFO L175 Difference]: Start difference. First operand has 119 places, 179 transitions, 1924 flow. Second operand 8 states and 237 transitions. [2024-06-20 16:21:42,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 235 transitions, 2882 flow [2024-06-20 16:21:42,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 235 transitions, 2728 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-20 16:21:42,323 INFO L231 Difference]: Finished difference. Result has 125 places, 179 transitions, 1969 flow [2024-06-20 16:21:42,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1969, PETRI_PLACES=125, PETRI_TRANSITIONS=179} [2024-06-20 16:21:42,324 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-20 16:21:42,324 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 179 transitions, 1969 flow [2024-06-20 16:21:42,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:42,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:42,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:42,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:21:42,325 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)] === [2024-06-20 16:21:42,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:42,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1657928050, now seen corresponding path program 4 times [2024-06-20 16:21:42,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:42,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720839592] [2024-06-20 16:21:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:42,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:43,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:43,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720839592] [2024-06-20 16:21:43,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720839592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:43,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:43,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:21:43,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406612985] [2024-06-20 16:21:43,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:43,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:21:43,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:43,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:21:43,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:21:43,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:43,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 179 transitions, 1969 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:43,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:43,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:43,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:45,535 INFO L124 PetriNetUnfolderBase]: 9994/14310 cut-off events. [2024-06-20 16:21:45,536 INFO L125 PetriNetUnfolderBase]: For 268666/268668 co-relation queries the response was YES. [2024-06-20 16:21:45,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82406 conditions, 14310 events. 9994/14310 cut-off events. For 268666/268668 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 82344 event pairs, 3979 based on Foata normal form. 7/14260 useless extension candidates. Maximal degree in co-relation 82357. Up to 12410 conditions per place. [2024-06-20 16:21:45,661 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 133 selfloop transitions, 97 changer transitions 0/238 dead transitions. [2024-06-20 16:21:45,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 238 transitions, 3033 flow [2024-06-20 16:21:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:21:45,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:21:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-20 16:21:45,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495283018867925 [2024-06-20 16:21:45,662 INFO L175 Difference]: Start difference. First operand has 125 places, 179 transitions, 1969 flow. Second operand 8 states and 233 transitions. [2024-06-20 16:21:45,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 238 transitions, 3033 flow [2024-06-20 16:21:45,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 238 transitions, 2784 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 16:21:45,825 INFO L231 Difference]: Finished difference. Result has 127 places, 185 transitions, 2048 flow [2024-06-20 16:21:45,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2048, PETRI_PLACES=127, PETRI_TRANSITIONS=185} [2024-06-20 16:21:45,826 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-20 16:21:45,826 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 185 transitions, 2048 flow [2024-06-20 16:21:45,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:45,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:45,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:45,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:21:45,827 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)] === [2024-06-20 16:21:45,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:45,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1797749094, now seen corresponding path program 5 times [2024-06-20 16:21:45,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:45,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139926650] [2024-06-20 16:21:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:45,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:46,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:46,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139926650] [2024-06-20 16:21:46,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139926650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:46,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:46,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:21:46,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524262432] [2024-06-20 16:21:46,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:46,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:21:46,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:46,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:21:46,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:21:46,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:46,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 185 transitions, 2048 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:46,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:46,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:46,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:48,923 INFO L124 PetriNetUnfolderBase]: 10058/14416 cut-off events. [2024-06-20 16:21:48,923 INFO L125 PetriNetUnfolderBase]: For 297495/297497 co-relation queries the response was YES. [2024-06-20 16:21:48,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85037 conditions, 14416 events. 10058/14416 cut-off events. For 297495/297497 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 83033 event pairs, 3972 based on Foata normal form. 7/14366 useless extension candidates. Maximal degree in co-relation 84987. Up to 12469 conditions per place. [2024-06-20 16:21:49,252 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 131 selfloop transitions, 102 changer transitions 0/241 dead transitions. [2024-06-20 16:21:49,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 241 transitions, 3050 flow [2024-06-20 16:21:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:21:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:21:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-20 16:21:49,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471698113207547 [2024-06-20 16:21:49,253 INFO L175 Difference]: Start difference. First operand has 127 places, 185 transitions, 2048 flow. Second operand 8 states and 232 transitions. [2024-06-20 16:21:49,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 241 transitions, 3050 flow [2024-06-20 16:21:49,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 241 transitions, 2693 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-20 16:21:49,448 INFO L231 Difference]: Finished difference. Result has 128 places, 190 transitions, 2005 flow [2024-06-20 16:21:49,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2005, PETRI_PLACES=128, PETRI_TRANSITIONS=190} [2024-06-20 16:21:49,449 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-06-20 16:21:49,449 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 190 transitions, 2005 flow [2024-06-20 16:21:49,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:49,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:49,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:49,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:21:49,450 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)] === [2024-06-20 16:21:49,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:49,451 INFO L85 PathProgramCache]: Analyzing trace with hash -738178150, now seen corresponding path program 6 times [2024-06-20 16:21:49,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:49,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875485335] [2024-06-20 16:21:49,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:49,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:50,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:50,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875485335] [2024-06-20 16:21:50,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875485335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:50,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:50,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:21:50,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425471605] [2024-06-20 16:21:50,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:50,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:21:50,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:50,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:21:50,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:21:50,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:50,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 190 transitions, 2005 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:50,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:50,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:50,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:52,522 INFO L124 PetriNetUnfolderBase]: 10091/14474 cut-off events. [2024-06-20 16:21:52,523 INFO L125 PetriNetUnfolderBase]: For 320251/320253 co-relation queries the response was YES. [2024-06-20 16:21:52,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85993 conditions, 14474 events. 10091/14474 cut-off events. For 320251/320253 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 83523 event pairs, 3937 based on Foata normal form. 7/14424 useless extension candidates. Maximal degree in co-relation 85943. Up to 12503 conditions per place. [2024-06-20 16:21:52,683 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 114 selfloop transitions, 120 changer transitions 0/242 dead transitions. [2024-06-20 16:21:52,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 242 transitions, 2855 flow [2024-06-20 16:21:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:21:52,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:21:52,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-20 16:21:52,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2024-06-20 16:21:52,684 INFO L175 Difference]: Start difference. First operand has 128 places, 190 transitions, 2005 flow. Second operand 8 states and 228 transitions. [2024-06-20 16:21:52,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 242 transitions, 2855 flow [2024-06-20 16:21:52,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 242 transitions, 2624 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 16:21:52,944 INFO L231 Difference]: Finished difference. Result has 131 places, 195 transitions, 2112 flow [2024-06-20 16:21:52,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2112, PETRI_PLACES=131, PETRI_TRANSITIONS=195} [2024-06-20 16:21:52,945 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-20 16:21:52,945 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 195 transitions, 2112 flow [2024-06-20 16:21:52,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:52,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:52,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:52,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:21:52,946 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)] === [2024-06-20 16:21:52,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:52,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1268895667, now seen corresponding path program 1 times [2024-06-20 16:21:52,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:52,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134975159] [2024-06-20 16:21:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:52,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:54,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:54,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134975159] [2024-06-20 16:21:54,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134975159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:54,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:54,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:21:54,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922889362] [2024-06-20 16:21:54,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:54,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:21:54,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:54,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:21:54,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:21:54,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:54,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 195 transitions, 2112 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:54,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:54,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:54,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:56,047 INFO L124 PetriNetUnfolderBase]: 10178/14583 cut-off events. [2024-06-20 16:21:56,047 INFO L125 PetriNetUnfolderBase]: For 349389/349397 co-relation queries the response was YES. [2024-06-20 16:21:56,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88749 conditions, 14583 events. 10178/14583 cut-off events. For 349389/349397 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 84075 event pairs, 3275 based on Foata normal form. 14/14577 useless extension candidates. Maximal degree in co-relation 88698. Up to 13554 conditions per place. [2024-06-20 16:21:56,206 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 207 selfloop transitions, 43 changer transitions 0/258 dead transitions. [2024-06-20 16:21:56,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 258 transitions, 3070 flow [2024-06-20 16:21:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:21:56,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:21:56,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-20 16:21:56,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073375262054507 [2024-06-20 16:21:56,208 INFO L175 Difference]: Start difference. First operand has 131 places, 195 transitions, 2112 flow. Second operand 9 states and 242 transitions. [2024-06-20 16:21:56,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 258 transitions, 3070 flow [2024-06-20 16:21:56,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 258 transitions, 2846 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 16:21:56,494 INFO L231 Difference]: Finished difference. Result has 135 places, 201 transitions, 2142 flow [2024-06-20 16:21:56,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2142, PETRI_PLACES=135, PETRI_TRANSITIONS=201} [2024-06-20 16:21:56,495 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-20 16:21:56,495 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 201 transitions, 2142 flow [2024-06-20 16:21:56,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:56,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:56,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:56,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:21:56,496 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)] === [2024-06-20 16:21:56,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:56,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1688720449, now seen corresponding path program 2 times [2024-06-20 16:21:56,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:56,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647020294] [2024-06-20 16:21:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:56,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:57,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:57,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647020294] [2024-06-20 16:21:57,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647020294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:57,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:57,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:21:57,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004070347] [2024-06-20 16:21:57,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:57,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:21:57,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:57,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:21:57,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:21:57,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:57,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 201 transitions, 2142 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:57,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:57,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:57,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:59,707 INFO L124 PetriNetUnfolderBase]: 10163/14562 cut-off events. [2024-06-20 16:21:59,707 INFO L125 PetriNetUnfolderBase]: For 381563/381571 co-relation queries the response was YES. [2024-06-20 16:21:59,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89826 conditions, 14562 events. 10163/14562 cut-off events. For 381563/381571 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 84015 event pairs, 3903 based on Foata normal form. 14/14556 useless extension candidates. Maximal degree in co-relation 89774. Up to 13640 conditions per place. [2024-06-20 16:21:59,850 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 202 selfloop transitions, 37 changer transitions 0/247 dead transitions. [2024-06-20 16:21:59,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 247 transitions, 2772 flow [2024-06-20 16:21:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:21:59,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:21:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-20 16:21:59,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-20 16:21:59,852 INFO L175 Difference]: Start difference. First operand has 135 places, 201 transitions, 2142 flow. Second operand 8 states and 213 transitions. [2024-06-20 16:21:59,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 247 transitions, 2772 flow [2024-06-20 16:22:00,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 247 transitions, 2591 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-20 16:22:00,232 INFO L231 Difference]: Finished difference. Result has 138 places, 201 transitions, 2046 flow [2024-06-20 16:22:00,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2046, PETRI_PLACES=138, PETRI_TRANSITIONS=201} [2024-06-20 16:22:00,233 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2024-06-20 16:22:00,233 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 201 transitions, 2046 flow [2024-06-20 16:22:00,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:00,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:00,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:00,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:22:00,234 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)] === [2024-06-20 16:22:00,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:00,234 INFO L85 PathProgramCache]: Analyzing trace with hash -61462865, now seen corresponding path program 3 times [2024-06-20 16:22:00,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:00,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618917173] [2024-06-20 16:22:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:00,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:01,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:01,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618917173] [2024-06-20 16:22:01,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618917173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:01,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:01,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:01,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555335775] [2024-06-20 16:22:01,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:01,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:01,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:01,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:01,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:01,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:22:01,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 201 transitions, 2046 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:01,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:01,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:22:01,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:03,339 INFO L124 PetriNetUnfolderBase]: 10199/14613 cut-off events. [2024-06-20 16:22:03,340 INFO L125 PetriNetUnfolderBase]: For 405457/405468 co-relation queries the response was YES. [2024-06-20 16:22:03,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90842 conditions, 14613 events. 10199/14613 cut-off events. For 405457/405468 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 84164 event pairs, 3916 based on Foata normal form. 12/14603 useless extension candidates. Maximal degree in co-relation 90788. Up to 13617 conditions per place. [2024-06-20 16:22:03,480 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 184 selfloop transitions, 53 changer transitions 0/245 dead transitions. [2024-06-20 16:22:03,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 245 transitions, 2730 flow [2024-06-20 16:22:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:22:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:22:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-20 16:22:03,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-20 16:22:03,482 INFO L175 Difference]: Start difference. First operand has 138 places, 201 transitions, 2046 flow. Second operand 8 states and 214 transitions. [2024-06-20 16:22:03,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 245 transitions, 2730 flow [2024-06-20 16:22:03,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 245 transitions, 2646 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 16:22:03,838 INFO L231 Difference]: Finished difference. Result has 139 places, 204 transitions, 2166 flow [2024-06-20 16:22:03,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2166, PETRI_PLACES=139, PETRI_TRANSITIONS=204} [2024-06-20 16:22:03,839 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-20 16:22:03,839 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 204 transitions, 2166 flow [2024-06-20 16:22:03,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:03,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:03,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:03,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:22:03,840 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:03,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:03,840 INFO L85 PathProgramCache]: Analyzing trace with hash 863418835, now seen corresponding path program 1 times [2024-06-20 16:22:03,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:03,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234394654] [2024-06-20 16:22:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:03,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:04,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:04,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234394654] [2024-06-20 16:22:04,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234394654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:04,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:04,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:04,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165168559] [2024-06-20 16:22:04,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:04,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:04,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:04,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:04,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:04,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:22:04,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 204 transitions, 2166 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:04,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:04,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:22:04,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:07,181 INFO L124 PetriNetUnfolderBase]: 10396/14857 cut-off events. [2024-06-20 16:22:07,181 INFO L125 PetriNetUnfolderBase]: For 452920/452931 co-relation queries the response was YES. [2024-06-20 16:22:07,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94758 conditions, 14857 events. 10396/14857 cut-off events. For 452920/452931 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 85328 event pairs, 3802 based on Foata normal form. 34/14842 useless extension candidates. Maximal degree in co-relation 94703. Up to 13428 conditions per place. [2024-06-20 16:22:07,340 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 200 selfloop transitions, 57 changer transitions 0/265 dead transitions. [2024-06-20 16:22:07,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 265 transitions, 3228 flow [2024-06-20 16:22:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:22:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:22:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-20 16:22:07,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495283018867925 [2024-06-20 16:22:07,342 INFO L175 Difference]: Start difference. First operand has 139 places, 204 transitions, 2166 flow. Second operand 8 states and 233 transitions. [2024-06-20 16:22:07,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 265 transitions, 3228 flow [2024-06-20 16:22:07,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 265 transitions, 3050 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 16:22:07,644 INFO L231 Difference]: Finished difference. Result has 141 places, 207 transitions, 2193 flow [2024-06-20 16:22:07,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1988, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2193, PETRI_PLACES=141, PETRI_TRANSITIONS=207} [2024-06-20 16:22:07,645 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-20 16:22:07,645 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 207 transitions, 2193 flow [2024-06-20 16:22:07,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:07,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:07,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:07,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:22:07,646 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:07,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:07,646 INFO L85 PathProgramCache]: Analyzing trace with hash 932737027, now seen corresponding path program 1 times [2024-06-20 16:22:07,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:07,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907766896] [2024-06-20 16:22:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:07,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:08,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:08,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907766896] [2024-06-20 16:22:08,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907766896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:08,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:08,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:22:08,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272743636] [2024-06-20 16:22:08,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:08,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:22:08,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:08,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:22:08,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:22:08,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:22:08,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 207 transitions, 2193 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:08,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:08,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:22:08,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:10,547 INFO L124 PetriNetUnfolderBase]: 9877/14372 cut-off events. [2024-06-20 16:22:10,548 INFO L125 PetriNetUnfolderBase]: For 475760/475803 co-relation queries the response was YES. [2024-06-20 16:22:10,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94579 conditions, 14372 events. 9877/14372 cut-off events. For 475760/475803 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85349 event pairs, 3822 based on Foata normal form. 31/14367 useless extension candidates. Maximal degree in co-relation 94523. Up to 13120 conditions per place. [2024-06-20 16:22:10,736 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 181 selfloop transitions, 41 changer transitions 0/242 dead transitions. [2024-06-20 16:22:10,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 242 transitions, 2918 flow [2024-06-20 16:22:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:22:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:22:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-20 16:22:10,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-20 16:22:10,738 INFO L175 Difference]: Start difference. First operand has 141 places, 207 transitions, 2193 flow. Second operand 6 states and 168 transitions. [2024-06-20 16:22:10,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 242 transitions, 2918 flow [2024-06-20 16:22:11,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 242 transitions, 2743 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 16:22:11,039 INFO L231 Difference]: Finished difference. Result has 141 places, 214 transitions, 2215 flow [2024-06-20 16:22:11,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2215, PETRI_PLACES=141, PETRI_TRANSITIONS=214} [2024-06-20 16:22:11,039 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-20 16:22:11,040 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 214 transitions, 2215 flow [2024-06-20 16:22:11,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:11,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:11,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:11,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:22:11,040 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:11,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:11,041 INFO L85 PathProgramCache]: Analyzing trace with hash -191416755, now seen corresponding path program 4 times [2024-06-20 16:22:11,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:11,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784712511] [2024-06-20 16:22:11,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:11,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:11,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:11,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784712511] [2024-06-20 16:22:11,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784712511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:11,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:11,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:11,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730693601] [2024-06-20 16:22:11,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:11,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:11,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:11,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:11,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:12,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:22:12,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 214 transitions, 2215 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:12,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:12,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:22:12,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:14,361 INFO L124 PetriNetUnfolderBase]: 10445/14953 cut-off events. [2024-06-20 16:22:14,362 INFO L125 PetriNetUnfolderBase]: For 498972/498974 co-relation queries the response was YES. [2024-06-20 16:22:14,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97571 conditions, 14953 events. 10445/14953 cut-off events. For 498972/498974 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 86149 event pairs, 3924 based on Foata normal form. 6/14918 useless extension candidates. Maximal degree in co-relation 97514. Up to 13963 conditions per place. [2024-06-20 16:22:14,532 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 195 selfloop transitions, 53 changer transitions 0/256 dead transitions. [2024-06-20 16:22:14,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 256 transitions, 2925 flow [2024-06-20 16:22:14,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:22:14,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:22:14,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 16:22:14,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49764150943396224 [2024-06-20 16:22:14,534 INFO L175 Difference]: Start difference. First operand has 141 places, 214 transitions, 2215 flow. Second operand 8 states and 211 transitions. [2024-06-20 16:22:14,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 256 transitions, 2925 flow [2024-06-20 16:22:14,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 256 transitions, 2838 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 16:22:14,917 INFO L231 Difference]: Finished difference. Result has 146 places, 217 transitions, 2342 flow [2024-06-20 16:22:14,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2128, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2342, PETRI_PLACES=146, PETRI_TRANSITIONS=217} [2024-06-20 16:22:14,919 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 90 predicate places. [2024-06-20 16:22:14,919 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 217 transitions, 2342 flow [2024-06-20 16:22:14,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:14,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:14,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:14,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:22:14,920 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:14,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:14,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1095584679, now seen corresponding path program 2 times [2024-06-20 16:22:14,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:14,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208983013] [2024-06-20 16:22:14,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:14,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:15,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:15,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208983013] [2024-06-20 16:22:15,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208983013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:15,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:15,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:15,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529314257] [2024-06-20 16:22:15,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:15,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:15,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:15,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:15,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:15,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:22:15,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 217 transitions, 2342 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:15,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:15,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:22:15,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:18,341 INFO L124 PetriNetUnfolderBase]: 10642/15222 cut-off events. [2024-06-20 16:22:18,342 INFO L125 PetriNetUnfolderBase]: For 552522/552543 co-relation queries the response was YES. [2024-06-20 16:22:18,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101538 conditions, 15222 events. 10642/15222 cut-off events. For 552522/552543 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 87705 event pairs, 3733 based on Foata normal form. 40/15216 useless extension candidates. Maximal degree in co-relation 101480. Up to 13751 conditions per place. [2024-06-20 16:22:18,508 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 201 selfloop transitions, 65 changer transitions 0/274 dead transitions. [2024-06-20 16:22:18,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 274 transitions, 3350 flow [2024-06-20 16:22:18,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:22:18,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:22:18,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-20 16:22:18,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535377358490566 [2024-06-20 16:22:18,509 INFO L175 Difference]: Start difference. First operand has 146 places, 217 transitions, 2342 flow. Second operand 8 states and 227 transitions. [2024-06-20 16:22:18,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 274 transitions, 3350 flow [2024-06-20 16:22:18,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 274 transitions, 3162 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-20 16:22:18,826 INFO L231 Difference]: Finished difference. Result has 148 places, 220 transitions, 2385 flow [2024-06-20 16:22:18,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2385, PETRI_PLACES=148, PETRI_TRANSITIONS=220} [2024-06-20 16:22:18,827 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-06-20 16:22:18,827 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 220 transitions, 2385 flow [2024-06-20 16:22:18,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:18,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:18,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:18,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:22:18,828 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:18,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:18,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1636579287, now seen corresponding path program 3 times [2024-06-20 16:22:18,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:18,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777279311] [2024-06-20 16:22:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:18,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:19,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:19,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777279311] [2024-06-20 16:22:19,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777279311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:19,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:19,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:19,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988283070] [2024-06-20 16:22:19,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:19,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:19,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:19,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:19,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:19,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:22:19,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 220 transitions, 2385 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:19,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:19,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:22:19,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:22,412 INFO L124 PetriNetUnfolderBase]: 10839/15505 cut-off events. [2024-06-20 16:22:22,412 INFO L125 PetriNetUnfolderBase]: For 597887/597908 co-relation queries the response was YES. [2024-06-20 16:22:22,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105930 conditions, 15505 events. 10839/15505 cut-off events. For 597887/597908 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 89569 event pairs, 3769 based on Foata normal form. 40/15499 useless extension candidates. Maximal degree in co-relation 105871. Up to 14034 conditions per place. [2024-06-20 16:22:22,552 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 211 selfloop transitions, 60 changer transitions 0/279 dead transitions. [2024-06-20 16:22:22,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 279 transitions, 3533 flow [2024-06-20 16:22:22,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:22:22,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:22:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-20 16:22:22,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400943396226415 [2024-06-20 16:22:22,554 INFO L175 Difference]: Start difference. First operand has 148 places, 220 transitions, 2385 flow. Second operand 8 states and 229 transitions. [2024-06-20 16:22:22,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 279 transitions, 3533 flow [2024-06-20 16:22:23,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 279 transitions, 3370 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-20 16:22:23,018 INFO L231 Difference]: Finished difference. Result has 151 places, 223 transitions, 2449 flow [2024-06-20 16:22:23,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2449, PETRI_PLACES=151, PETRI_TRANSITIONS=223} [2024-06-20 16:22:23,018 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-20 16:22:23,018 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 223 transitions, 2449 flow [2024-06-20 16:22:23,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:23,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:23,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:23,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:22:23,019 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)] === [2024-06-20 16:22:23,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:23,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1400107257, now seen corresponding path program 4 times [2024-06-20 16:22:23,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:23,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122855579] [2024-06-20 16:22:23,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:23,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:23,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:23,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122855579] [2024-06-20 16:22:23,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122855579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:23,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:23,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:23,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961574363] [2024-06-20 16:22:23,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:23,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:23,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:23,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:23,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:24,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:22:24,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 223 transitions, 2449 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:24,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:24,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:22:24,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:26,672 INFO L124 PetriNetUnfolderBase]: 10985/15715 cut-off events. [2024-06-20 16:22:26,673 INFO L125 PetriNetUnfolderBase]: For 635762/635783 co-relation queries the response was YES. [2024-06-20 16:22:26,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108789 conditions, 15715 events. 10985/15715 cut-off events. For 635762/635783 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 90958 event pairs, 3508 based on Foata normal form. 40/15709 useless extension candidates. Maximal degree in co-relation 108729. Up to 13459 conditions per place. [2024-06-20 16:22:26,850 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 200 selfloop transitions, 76 changer transitions 0/284 dead transitions. [2024-06-20 16:22:26,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 284 transitions, 3525 flow [2024-06-20 16:22:26,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:22:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:22:26,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-20 16:22:26,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424528301886793 [2024-06-20 16:22:26,852 INFO L175 Difference]: Start difference. First operand has 151 places, 223 transitions, 2449 flow. Second operand 8 states and 230 transitions. [2024-06-20 16:22:26,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 284 transitions, 3525 flow [2024-06-20 16:22:27,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 284 transitions, 3334 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 16:22:27,457 INFO L231 Difference]: Finished difference. Result has 153 places, 226 transitions, 2522 flow [2024-06-20 16:22:27,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2522, PETRI_PLACES=153, PETRI_TRANSITIONS=226} [2024-06-20 16:22:27,457 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-20 16:22:27,457 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 226 transitions, 2522 flow [2024-06-20 16:22:27,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:27,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:27,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:27,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:22:27,458 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:27,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:27,458 INFO L85 PathProgramCache]: Analyzing trace with hash 441895651, now seen corresponding path program 2 times [2024-06-20 16:22:27,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:27,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660583327] [2024-06-20 16:22:27,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:27,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:28,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:28,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660583327] [2024-06-20 16:22:28,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660583327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:28,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:28,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:22:28,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766782930] [2024-06-20 16:22:28,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:28,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:22:28,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:28,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:22:28,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:22:28,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:22:28,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 226 transitions, 2522 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:28,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:28,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:22:28,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:30,944 INFO L124 PetriNetUnfolderBase]: 10281/14991 cut-off events. [2024-06-20 16:22:30,944 INFO L125 PetriNetUnfolderBase]: For 650991/651006 co-relation queries the response was YES. [2024-06-20 16:22:31,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105284 conditions, 14991 events. 10281/14991 cut-off events. For 650991/651006 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 89994 event pairs, 3956 based on Foata normal form. 15/14955 useless extension candidates. Maximal degree in co-relation 105223. Up to 13619 conditions per place. [2024-06-20 16:22:31,102 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 182 selfloop transitions, 41 changer transitions 0/246 dead transitions. [2024-06-20 16:22:31,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 246 transitions, 3028 flow [2024-06-20 16:22:31,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:22:31,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:22:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 16:22:31,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:22:31,104 INFO L175 Difference]: Start difference. First operand has 153 places, 226 transitions, 2522 flow. Second operand 6 states and 159 transitions. [2024-06-20 16:22:31,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 246 transitions, 3028 flow [2024-06-20 16:22:31,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 246 transitions, 2770 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-20 16:22:31,592 INFO L231 Difference]: Finished difference. Result has 153 places, 226 transitions, 2358 flow [2024-06-20 16:22:31,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2358, PETRI_PLACES=153, PETRI_TRANSITIONS=226} [2024-06-20 16:22:31,592 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-20 16:22:31,592 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 226 transitions, 2358 flow [2024-06-20 16:22:31,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:31,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:31,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:31,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:22:31,593 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:31,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:31,593 INFO L85 PathProgramCache]: Analyzing trace with hash -422686847, now seen corresponding path program 1 times [2024-06-20 16:22:31,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:31,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543386485] [2024-06-20 16:22:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:31,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:32,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:32,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543386485] [2024-06-20 16:22:32,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543386485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:32,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:32,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:22:32,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259614772] [2024-06-20 16:22:32,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:32,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:22:32,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:32,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:22:32,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:22:32,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:22:32,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 226 transitions, 2358 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:32,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:32,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:22:32,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:34,637 INFO L124 PetriNetUnfolderBase]: 9825/14481 cut-off events. [2024-06-20 16:22:34,637 INFO L125 PetriNetUnfolderBase]: For 585976/585978 co-relation queries the response was YES. [2024-06-20 16:22:34,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98215 conditions, 14481 events. 9825/14481 cut-off events. For 585976/585978 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 87432 event pairs, 3449 based on Foata normal form. 8/14435 useless extension candidates. Maximal degree in co-relation 98153. Up to 13276 conditions per place. [2024-06-20 16:22:34,810 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 222 selfloop transitions, 25 changer transitions 0/256 dead transitions. [2024-06-20 16:22:34,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 256 transitions, 3104 flow [2024-06-20 16:22:34,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:22:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:22:34,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-20 16:22:34,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251572327044025 [2024-06-20 16:22:34,812 INFO L175 Difference]: Start difference. First operand has 153 places, 226 transitions, 2358 flow. Second operand 6 states and 167 transitions. [2024-06-20 16:22:34,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 256 transitions, 3104 flow [2024-06-20 16:22:35,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 256 transitions, 2987 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 16:22:35,439 INFO L231 Difference]: Finished difference. Result has 154 places, 230 transitions, 2356 flow [2024-06-20 16:22:35,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2356, PETRI_PLACES=154, PETRI_TRANSITIONS=230} [2024-06-20 16:22:35,439 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-20 16:22:35,439 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 230 transitions, 2356 flow [2024-06-20 16:22:35,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:35,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:35,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:35,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:22:35,440 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:35,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:35,440 INFO L85 PathProgramCache]: Analyzing trace with hash -560411123, now seen corresponding path program 2 times [2024-06-20 16:22:35,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:35,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598813308] [2024-06-20 16:22:35,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:35,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:36,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:36,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598813308] [2024-06-20 16:22:36,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598813308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:36,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:36,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:22:36,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420713312] [2024-06-20 16:22:36,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:36,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:22:36,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:36,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:22:36,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:22:36,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:22:36,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 230 transitions, 2356 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:36,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:36,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:22:36,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:38,814 INFO L124 PetriNetUnfolderBase]: 9673/14215 cut-off events. [2024-06-20 16:22:38,814 INFO L125 PetriNetUnfolderBase]: For 604186/604191 co-relation queries the response was YES. [2024-06-20 16:22:38,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97840 conditions, 14215 events. 9673/14215 cut-off events. For 604186/604191 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 85083 event pairs, 3363 based on Foata normal form. 4/14168 useless extension candidates. Maximal degree in co-relation 97777. Up to 13060 conditions per place. [2024-06-20 16:22:38,940 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 216 selfloop transitions, 26 changer transitions 0/251 dead transitions. [2024-06-20 16:22:38,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 251 transitions, 2902 flow [2024-06-20 16:22:38,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:22:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:22:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-20 16:22:38,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125786163522013 [2024-06-20 16:22:38,949 INFO L175 Difference]: Start difference. First operand has 154 places, 230 transitions, 2356 flow. Second operand 6 states and 163 transitions. [2024-06-20 16:22:38,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 251 transitions, 2902 flow [2024-06-20 16:22:39,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 251 transitions, 2851 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 16:22:39,372 INFO L231 Difference]: Finished difference. Result has 157 places, 230 transitions, 2366 flow [2024-06-20 16:22:39,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2366, PETRI_PLACES=157, PETRI_TRANSITIONS=230} [2024-06-20 16:22:39,373 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 101 predicate places. [2024-06-20 16:22:39,373 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 230 transitions, 2366 flow [2024-06-20 16:22:39,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:39,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:39,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:39,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:22:39,373 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)] === [2024-06-20 16:22:39,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1272972305, now seen corresponding path program 1 times [2024-06-20 16:22:39,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:39,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112299935] [2024-06-20 16:22:39,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:39,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:40,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:40,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112299935] [2024-06-20 16:22:40,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112299935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:40,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:40,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:22:40,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074448049] [2024-06-20 16:22:40,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:40,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:22:40,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:40,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:22:40,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:22:40,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:22:40,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 230 transitions, 2366 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:40,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:40,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:22:40,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:44,158 INFO L124 PetriNetUnfolderBase]: 12896/18583 cut-off events. [2024-06-20 16:22:44,159 INFO L125 PetriNetUnfolderBase]: For 934920/934928 co-relation queries the response was YES. [2024-06-20 16:22:44,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135333 conditions, 18583 events. 12896/18583 cut-off events. For 934920/934928 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 113325 event pairs, 3799 based on Foata normal form. 86/18610 useless extension candidates. Maximal degree in co-relation 135269. Up to 14311 conditions per place. [2024-06-20 16:22:44,335 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 259 selfloop transitions, 62 changer transitions 0/329 dead transitions. [2024-06-20 16:22:44,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 329 transitions, 4050 flow [2024-06-20 16:22:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:22:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:22:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 297 transitions. [2024-06-20 16:22:44,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.560377358490566 [2024-06-20 16:22:44,347 INFO L175 Difference]: Start difference. First operand has 157 places, 230 transitions, 2366 flow. Second operand 10 states and 297 transitions. [2024-06-20 16:22:44,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 329 transitions, 4050 flow [2024-06-20 16:22:44,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 329 transitions, 3966 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:22:44,815 INFO L231 Difference]: Finished difference. Result has 163 places, 236 transitions, 2651 flow [2024-06-20 16:22:44,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2651, PETRI_PLACES=163, PETRI_TRANSITIONS=236} [2024-06-20 16:22:44,816 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 107 predicate places. [2024-06-20 16:22:44,816 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 236 transitions, 2651 flow [2024-06-20 16:22:44,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:44,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:44,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:44,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:22:44,821 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)] === [2024-06-20 16:22:44,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:44,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1271094635, now seen corresponding path program 2 times [2024-06-20 16:22:44,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:44,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149662773] [2024-06-20 16:22:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:44,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:46,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:46,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149662773] [2024-06-20 16:22:46,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149662773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:46,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:46,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:22:46,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526201142] [2024-06-20 16:22:46,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:46,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:22:46,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:46,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:22:46,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:22:46,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:22:46,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 236 transitions, 2651 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:46,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:46,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:22:46,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:49,821 INFO L124 PetriNetUnfolderBase]: 13456/19447 cut-off events. [2024-06-20 16:22:49,821 INFO L125 PetriNetUnfolderBase]: For 1043651/1043659 co-relation queries the response was YES. [2024-06-20 16:22:49,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145028 conditions, 19447 events. 13456/19447 cut-off events. For 1043651/1043659 co-relation queries the response was YES. Maximal size of possible extension queue 767. Compared 120208 event pairs, 4832 based on Foata normal form. 100/19498 useless extension candidates. Maximal degree in co-relation 144961. Up to 17403 conditions per place. [2024-06-20 16:22:49,999 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 239 selfloop transitions, 57 changer transitions 0/304 dead transitions. [2024-06-20 16:22:49,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 304 transitions, 3692 flow [2024-06-20 16:22:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:22:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:22:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 256 transitions. [2024-06-20 16:22:50,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366876310272537 [2024-06-20 16:22:50,001 INFO L175 Difference]: Start difference. First operand has 163 places, 236 transitions, 2651 flow. Second operand 9 states and 256 transitions. [2024-06-20 16:22:50,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 304 transitions, 3692 flow [2024-06-20 16:22:50,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 304 transitions, 3548 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-20 16:22:50,851 INFO L231 Difference]: Finished difference. Result has 167 places, 238 transitions, 2729 flow [2024-06-20 16:22:50,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2729, PETRI_PLACES=167, PETRI_TRANSITIONS=238} [2024-06-20 16:22:50,851 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 111 predicate places. [2024-06-20 16:22:50,851 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 238 transitions, 2729 flow [2024-06-20 16:22:50,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:50,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:50,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:50,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:22:50,852 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)] === [2024-06-20 16:22:50,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:50,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1677642423, now seen corresponding path program 3 times [2024-06-20 16:22:50,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:50,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345387468] [2024-06-20 16:22:50,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:50,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:52,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:52,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345387468] [2024-06-20 16:22:52,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345387468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:52,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:52,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:22:52,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319634003] [2024-06-20 16:22:52,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:52,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:22:52,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:52,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:22:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:22:52,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:22:52,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 238 transitions, 2729 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:52,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:52,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:22:52,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:56,057 INFO L124 PetriNetUnfolderBase]: 13830/20083 cut-off events. [2024-06-20 16:22:56,057 INFO L125 PetriNetUnfolderBase]: For 1076583/1076591 co-relation queries the response was YES. [2024-06-20 16:22:56,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147764 conditions, 20083 events. 13830/20083 cut-off events. For 1076583/1076591 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 126120 event pairs, 4851 based on Foata normal form. 86/20120 useless extension candidates. Maximal degree in co-relation 147695. Up to 16240 conditions per place. [2024-06-20 16:22:56,289 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 250 selfloop transitions, 58 changer transitions 0/316 dead transitions. [2024-06-20 16:22:56,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 316 transitions, 4045 flow [2024-06-20 16:22:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:22:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:22:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-06-20 16:22:56,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549266247379455 [2024-06-20 16:22:56,290 INFO L175 Difference]: Start difference. First operand has 167 places, 238 transitions, 2729 flow. Second operand 9 states and 262 transitions. [2024-06-20 16:22:56,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 316 transitions, 4045 flow [2024-06-20 16:22:57,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 316 transitions, 3868 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-20 16:22:57,102 INFO L231 Difference]: Finished difference. Result has 170 places, 242 transitions, 2862 flow [2024-06-20 16:22:57,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2552, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2862, PETRI_PLACES=170, PETRI_TRANSITIONS=242} [2024-06-20 16:22:57,103 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 114 predicate places. [2024-06-20 16:22:57,103 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 242 transitions, 2862 flow [2024-06-20 16:22:57,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:57,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:57,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:57,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:22:57,104 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)] === [2024-06-20 16:22:57,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:57,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1905343851, now seen corresponding path program 4 times [2024-06-20 16:22:57,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:57,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617038027] [2024-06-20 16:22:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:57,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:58,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:58,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617038027] [2024-06-20 16:22:58,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617038027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:58,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:58,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:22:58,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112553545] [2024-06-20 16:22:58,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:58,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:22:58,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:58,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:22:58,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:22:58,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:22:58,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 242 transitions, 2862 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:58,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:58,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:22:58,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand