./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.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/mutex-meet/safe002_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe002_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:51:43,760 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:51:43,844 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:51:43,851 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:51:43,851 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:51:43,873 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:51:43,874 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:51:43,874 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:51:43,875 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:51:43,878 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:51:43,878 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:51:43,878 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:51:43,879 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:51:43,880 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:51:43,880 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:51:43,880 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:51:43,880 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:51:43,881 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:51:43,881 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:51:43,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:51:43,881 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:51:43,881 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:51:43,882 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:51:43,882 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:51:43,882 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:51:43,882 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:51:43,882 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:51:43,882 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:51:43,883 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:51:43,883 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:51:43,884 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:51:43,884 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:51:43,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:51:43,884 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:51:43,885 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:51:43,885 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:51:43,885 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:51:43,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:51:43,885 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:51:43,885 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:51:43,886 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:51:43,886 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:51:43,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:51:43,886 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:51:44,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:51:44,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:51:44,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:51:44,141 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:51:44,142 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:51:44,143 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe002_tso.yml/witness.yml [2024-06-14 13:51:44,287 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:51:44,289 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:51:44,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.i [2024-06-14 13:51:45,311 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:51:45,559 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:51:45,559 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_tso.i [2024-06-14 13:51:45,590 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c04395320/7b97b0e62d3148cc9dd024f6cc8a25a9/FLAG26332f6e0 [2024-06-14 13:51:45,604 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c04395320/7b97b0e62d3148cc9dd024f6cc8a25a9 [2024-06-14 13:51:45,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:51:45,605 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:51:45,607 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:51:45,608 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:51:45,611 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:51:45,612 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:51:44" (1/2) ... [2024-06-14 13:51:45,613 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3db67090 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:45, skipping insertion in model container [2024-06-14 13:51:45,613 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:51:44" (1/2) ... [2024-06-14 13:51:45,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d905570 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:45, skipping insertion in model container [2024-06-14 13:51:45,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:51:45" (2/2) ... [2024-06-14 13:51:45,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3db67090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:45, skipping insertion in model container [2024-06-14 13:51:45,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:51:45" (2/2) ... [2024-06-14 13:51:45,615 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:51:45,651 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:51:45,652 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EBX <= 1) && x <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 13:51:45,652 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EBX <= 1) && x <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 13:51:45,652 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EBX <= 1) && x <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 13:51:45,653 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:51:45,653 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-14 13:51:45,689 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:51:45,986 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:51:45,995 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:51:46,131 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:51:46,171 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:51:46,172 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:46 WrapperNode [2024-06-14 13:51:46,172 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:51:46,173 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:51:46,173 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:51:46,173 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:51:46,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:46" (1/1) ... [2024-06-14 13:51:46,204 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:46" (1/1) ... [2024-06-14 13:51:46,240 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-14 13:51:46,240 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:51:46,241 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:51:46,243 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:51:46,243 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:51:46,252 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:46" (1/1) ... [2024-06-14 13:51:46,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:46" (1/1) ... [2024-06-14 13:51:46,256 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:46" (1/1) ... [2024-06-14 13:51:46,269 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 13:51:46,270 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:46" (1/1) ... [2024-06-14 13:51:46,270 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:46" (1/1) ... [2024-06-14 13:51:46,275 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:46" (1/1) ... [2024-06-14 13:51:46,278 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:46" (1/1) ... [2024-06-14 13:51:46,279 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:46" (1/1) ... [2024-06-14 13:51:46,280 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:46" (1/1) ... [2024-06-14 13:51:46,283 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:51:46,283 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:51:46,283 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:51:46,284 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:51:46,284 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:46" (1/1) ... [2024-06-14 13:51:46,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:51:46,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:51:46,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 13:51:46,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 13:51:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:51:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:51:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:51:46,446 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:51:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:51:46,447 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:51:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:51:46,447 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:51:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:51:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:51:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:51:46,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:51:46,449 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:51:46,546 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:51:46,548 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:51:46,877 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:51:46,878 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:51:46,972 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:51:46,973 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:51:46,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:51:46 BoogieIcfgContainer [2024-06-14 13:51:46,974 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:51:46,976 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:51:46,976 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:51:46,978 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:51:46,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:51:44" (1/4) ... [2024-06-14 13:51:46,979 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5512b71a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:51:46, skipping insertion in model container [2024-06-14 13:51:46,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:51:45" (2/4) ... [2024-06-14 13:51:46,979 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5512b71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:51:46, skipping insertion in model container [2024-06-14 13:51:46,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:46" (3/4) ... [2024-06-14 13:51:46,980 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5512b71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:51:46, skipping insertion in model container [2024-06-14 13:51:46,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:51:46" (4/4) ... [2024-06-14 13:51:46,981 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_tso.i [2024-06-14 13:51:46,995 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:51:46,996 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:51:46,996 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:51:47,041 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:51:47,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:51:47,112 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 13:51:47,113 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:51:47,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:51:47,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:51:47,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 13:51:47,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:51:47,135 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;@3855dcc4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:51:47,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:51:47,138 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:51:47,139 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:51:47,139 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:51:47,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:47,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:51:47,140 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:47,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:47,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1782945868, now seen corresponding path program 1 times [2024-06-14 13:51:47,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:47,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480116388] [2024-06-14 13:51:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:47,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:47,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:47,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480116388] [2024-06-14 13:51:47,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480116388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:47,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:47,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:51:47,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345917118] [2024-06-14 13:51:47,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:47,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:51:47,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:47,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:51:47,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:51:47,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-14 13:51:47,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:47,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:47,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-14 13:51:47,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:48,039 INFO L124 PetriNetUnfolderBase]: 430/730 cut-off events. [2024-06-14 13:51:48,040 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-14 13:51:48,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 730 events. 430/730 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3710 event pairs, 241 based on Foata normal form. 1/693 useless extension candidates. Maximal degree in co-relation 1440. Up to 672 conditions per place. [2024-06-14 13:51:48,048 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 29 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 13:51:48,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 165 flow [2024-06-14 13:51:48,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:51:48,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:51:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-14 13:51:48,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-14 13:51:48,060 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 84 transitions. [2024-06-14 13:51:48,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 165 flow [2024-06-14 13:51:48,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:51:48,064 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 13:51:48,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 13:51:48,068 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 13:51:48,068 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 13:51:48,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:48,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:48,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:48,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:51:48,069 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:48,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:48,070 INFO L85 PathProgramCache]: Analyzing trace with hash -116908628, now seen corresponding path program 1 times [2024-06-14 13:51:48,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:48,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678619779] [2024-06-14 13:51:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:48,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:48,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:48,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678619779] [2024-06-14 13:51:48,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678619779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:48,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:48,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:48,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852680291] [2024-06-14 13:51:48,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:48,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:48,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:48,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:48,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:48,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:51:48,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:48,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:48,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:51:48,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:48,501 INFO L124 PetriNetUnfolderBase]: 755/1248 cut-off events. [2024-06-14 13:51:48,501 INFO L125 PetriNetUnfolderBase]: For 222/236 co-relation queries the response was YES. [2024-06-14 13:51:48,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2843 conditions, 1248 events. 755/1248 cut-off events. For 222/236 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6102 event pairs, 249 based on Foata normal form. 13/1224 useless extension candidates. Maximal degree in co-relation 2828. Up to 1093 conditions per place. [2024-06-14 13:51:48,509 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 37 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2024-06-14 13:51:48,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 224 flow [2024-06-14 13:51:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:51:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:51:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-14 13:51:48,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 13:51:48,511 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 102 transitions. [2024-06-14 13:51:48,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 224 flow [2024-06-14 13:51:48,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:51:48,513 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 123 flow [2024-06-14 13:51:48,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-14 13:51:48,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-06-14 13:51:48,514 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 123 flow [2024-06-14 13:51:48,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:48,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:48,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:48,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:51:48,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:48,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:48,515 INFO L85 PathProgramCache]: Analyzing trace with hash -214704722, now seen corresponding path program 1 times [2024-06-14 13:51:48,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:48,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859754017] [2024-06-14 13:51:48,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:48,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:48,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:48,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859754017] [2024-06-14 13:51:48,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859754017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:48,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:48,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:51:48,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91119111] [2024-06-14 13:51:48,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:48,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:51:48,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:48,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:51:48,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:51:48,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-14 13:51:48,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:48,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:48,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-14 13:51:48,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:48,951 INFO L124 PetriNetUnfolderBase]: 583/984 cut-off events. [2024-06-14 13:51:48,951 INFO L125 PetriNetUnfolderBase]: For 494/497 co-relation queries the response was YES. [2024-06-14 13:51:48,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2454 conditions, 984 events. 583/984 cut-off events. For 494/497 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4773 event pairs, 249 based on Foata normal form. 4/986 useless extension candidates. Maximal degree in co-relation 2437. Up to 889 conditions per place. [2024-06-14 13:51:48,956 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-14 13:51:48,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 265 flow [2024-06-14 13:51:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:51:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:51:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-14 13:51:48,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 13:51:48,958 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 123 flow. Second operand 4 states and 102 transitions. [2024-06-14 13:51:48,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 265 flow [2024-06-14 13:51:48,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 248 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:51:48,960 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 166 flow [2024-06-14 13:51:48,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-14 13:51:48,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-06-14 13:51:48,961 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 166 flow [2024-06-14 13:51:48,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:48,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:48,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:48,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:51:48,962 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:48,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:48,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1934089472, now seen corresponding path program 1 times [2024-06-14 13:51:48,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:48,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700360430] [2024-06-14 13:51:48,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:48,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:49,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:49,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700360430] [2024-06-14 13:51:49,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700360430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:49,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:49,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:49,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065675730] [2024-06-14 13:51:49,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:49,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:49,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:49,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:49,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:49,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:49,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:49,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:49,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:49,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:49,439 INFO L124 PetriNetUnfolderBase]: 957/1564 cut-off events. [2024-06-14 13:51:49,439 INFO L125 PetriNetUnfolderBase]: For 1173/1175 co-relation queries the response was YES. [2024-06-14 13:51:49,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4199 conditions, 1564 events. 957/1564 cut-off events. For 1173/1175 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7880 event pairs, 288 based on Foata normal form. 10/1572 useless extension candidates. Maximal degree in co-relation 4180. Up to 1324 conditions per place. [2024-06-14 13:51:49,448 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 52 selfloop transitions, 22 changer transitions 0/80 dead transitions. [2024-06-14 13:51:49,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 80 transitions, 428 flow [2024-06-14 13:51:49,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:51:49,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:51:49,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 13:51:49,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-14 13:51:49,450 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 166 flow. Second operand 7 states and 162 transitions. [2024-06-14 13:51:49,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 80 transitions, 428 flow [2024-06-14 13:51:49,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 424 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 13:51:49,453 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 299 flow [2024-06-14 13:51:49,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=299, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2024-06-14 13:51:49,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-14 13:51:49,454 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 299 flow [2024-06-14 13:51:49,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:49,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:49,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:49,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:51:49,454 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:49,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:49,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2078014321, now seen corresponding path program 1 times [2024-06-14 13:51:49,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:49,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068175806] [2024-06-14 13:51:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:49,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:49,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:49,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068175806] [2024-06-14 13:51:49,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068175806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:49,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:49,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:49,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128553757] [2024-06-14 13:51:49,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:49,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:49,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:49,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:49,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:49,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:51:49,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 299 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:49,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:49,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:51:49,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:49,976 INFO L124 PetriNetUnfolderBase]: 942/1561 cut-off events. [2024-06-14 13:51:49,976 INFO L125 PetriNetUnfolderBase]: For 3144/3219 co-relation queries the response was YES. [2024-06-14 13:51:49,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5380 conditions, 1561 events. 942/1561 cut-off events. For 3144/3219 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7925 event pairs, 327 based on Foata normal form. 30/1558 useless extension candidates. Maximal degree in co-relation 5356. Up to 1328 conditions per place. [2024-06-14 13:51:49,988 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 53 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2024-06-14 13:51:49,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 73 transitions, 493 flow [2024-06-14 13:51:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:51:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:51:49,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-14 13:51:49,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-14 13:51:49,989 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 299 flow. Second operand 4 states and 103 transitions. [2024-06-14 13:51:49,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 73 transitions, 493 flow [2024-06-14 13:51:49,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 73 transitions, 465 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 13:51:49,995 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 333 flow [2024-06-14 13:51:49,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=333, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2024-06-14 13:51:49,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-14 13:51:49,996 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 333 flow [2024-06-14 13:51:49,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:49,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:49,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:49,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:51:49,997 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:49,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:49,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2101371271, now seen corresponding path program 2 times [2024-06-14 13:51:49,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:49,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938121552] [2024-06-14 13:51:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:49,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:50,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:50,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938121552] [2024-06-14 13:51:50,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938121552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:50,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:50,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:50,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676006263] [2024-06-14 13:51:50,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:50,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:50,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:50,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:50,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:50,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:51:50,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 60 transitions, 333 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:50,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:50,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:51:50,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:50,461 INFO L124 PetriNetUnfolderBase]: 935/1553 cut-off events. [2024-06-14 13:51:50,462 INFO L125 PetriNetUnfolderBase]: For 4128/4212 co-relation queries the response was YES. [2024-06-14 13:51:50,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5666 conditions, 1553 events. 935/1553 cut-off events. For 4128/4212 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7910 event pairs, 325 based on Foata normal form. 37/1558 useless extension candidates. Maximal degree in co-relation 5641. Up to 1307 conditions per place. [2024-06-14 13:51:50,472 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 57 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-14 13:51:50,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 557 flow [2024-06-14 13:51:50,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:51:50,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:51:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 13:51:50,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-14 13:51:50,473 INFO L175 Difference]: Start difference. First operand has 57 places, 60 transitions, 333 flow. Second operand 5 states and 124 transitions. [2024-06-14 13:51:50,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 557 flow [2024-06-14 13:51:50,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 80 transitions, 535 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 13:51:50,478 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 381 flow [2024-06-14 13:51:50,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=381, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2024-06-14 13:51:50,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-14 13:51:50,479 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 381 flow [2024-06-14 13:51:50,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:50,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:50,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:50,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:51:50,480 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:50,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:50,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1916725397, now seen corresponding path program 1 times [2024-06-14 13:51:50,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:50,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859517883] [2024-06-14 13:51:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:50,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:50,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:50,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859517883] [2024-06-14 13:51:50,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859517883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:50,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:50,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:50,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812608471] [2024-06-14 13:51:50,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:50,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:50,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:50,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:50,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:50,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 381 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:50,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:50,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:50,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:51,007 INFO L124 PetriNetUnfolderBase]: 988/1622 cut-off events. [2024-06-14 13:51:51,007 INFO L125 PetriNetUnfolderBase]: For 4478/4480 co-relation queries the response was YES. [2024-06-14 13:51:51,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6097 conditions, 1622 events. 988/1622 cut-off events. For 4478/4480 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8264 event pairs, 277 based on Foata normal form. 6/1626 useless extension candidates. Maximal degree in co-relation 6071. Up to 1327 conditions per place. [2024-06-14 13:51:51,019 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 65 selfloop transitions, 35 changer transitions 0/106 dead transitions. [2024-06-14 13:51:51,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 106 transitions, 779 flow [2024-06-14 13:51:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:51:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:51:51,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 13:51:51,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-14 13:51:51,021 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 381 flow. Second operand 8 states and 185 transitions. [2024-06-14 13:51:51,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 106 transitions, 779 flow [2024-06-14 13:51:51,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 106 transitions, 735 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 13:51:51,028 INFO L231 Difference]: Finished difference. Result has 67 places, 78 transitions, 531 flow [2024-06-14 13:51:51,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=531, PETRI_PLACES=67, PETRI_TRANSITIONS=78} [2024-06-14 13:51:51,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-14 13:51:51,029 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 78 transitions, 531 flow [2024-06-14 13:51:51,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:51,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:51,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:51,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:51:51,030 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:51,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:51,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1060815169, now seen corresponding path program 1 times [2024-06-14 13:51:51,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:51,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354912766] [2024-06-14 13:51:51,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:51,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:51,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:51,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354912766] [2024-06-14 13:51:51,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354912766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:51,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:51,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:51,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943056929] [2024-06-14 13:51:51,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:51,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:51,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:51,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:51,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:51,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:51,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 78 transitions, 531 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:51,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:51,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:51,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:51,662 INFO L124 PetriNetUnfolderBase]: 1089/1783 cut-off events. [2024-06-14 13:51:51,663 INFO L125 PetriNetUnfolderBase]: For 7101/7103 co-relation queries the response was YES. [2024-06-14 13:51:51,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7386 conditions, 1783 events. 1089/1783 cut-off events. For 7101/7103 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9160 event pairs, 262 based on Foata normal form. 30/1811 useless extension candidates. Maximal degree in co-relation 7357. Up to 1395 conditions per place. [2024-06-14 13:51:51,676 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 81 selfloop transitions, 26 changer transitions 0/113 dead transitions. [2024-06-14 13:51:51,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 113 transitions, 909 flow [2024-06-14 13:51:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:51:51,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:51:51,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:51:51,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 13:51:51,678 INFO L175 Difference]: Start difference. First operand has 67 places, 78 transitions, 531 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:51:51,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 113 transitions, 909 flow [2024-06-14 13:51:51,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 869 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 13:51:51,687 INFO L231 Difference]: Finished difference. Result has 73 places, 82 transitions, 601 flow [2024-06-14 13:51:51,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=601, PETRI_PLACES=73, PETRI_TRANSITIONS=82} [2024-06-14 13:51:51,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-14 13:51:51,688 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 82 transitions, 601 flow [2024-06-14 13:51:51,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:51,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:51,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:51,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:51:51,689 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:51,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:51,689 INFO L85 PathProgramCache]: Analyzing trace with hash -6064227, now seen corresponding path program 1 times [2024-06-14 13:51:51,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:51,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675985561] [2024-06-14 13:51:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:51,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:51,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:51,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675985561] [2024-06-14 13:51:51,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675985561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:51,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:51,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:51:51,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970826147] [2024-06-14 13:51:51,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:51,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:51:51,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:51,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:51:51,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:51:52,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:52,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 82 transitions, 601 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:52,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:52,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:52,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:52,334 INFO L124 PetriNetUnfolderBase]: 1229/2013 cut-off events. [2024-06-14 13:51:52,334 INFO L125 PetriNetUnfolderBase]: For 8539/8539 co-relation queries the response was YES. [2024-06-14 13:51:52,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8870 conditions, 2013 events. 1229/2013 cut-off events. For 8539/8539 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10559 event pairs, 280 based on Foata normal form. 4/2013 useless extension candidates. Maximal degree in co-relation 8839. Up to 1673 conditions per place. [2024-06-14 13:51:52,350 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 89 selfloop transitions, 38 changer transitions 0/133 dead transitions. [2024-06-14 13:51:52,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 133 transitions, 1223 flow [2024-06-14 13:51:52,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:52,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 13:51:52,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-14 13:51:52,352 INFO L175 Difference]: Start difference. First operand has 73 places, 82 transitions, 601 flow. Second operand 6 states and 149 transitions. [2024-06-14 13:51:52,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 133 transitions, 1223 flow [2024-06-14 13:51:52,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 133 transitions, 1127 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:51:52,367 INFO L231 Difference]: Finished difference. Result has 75 places, 111 transitions, 933 flow [2024-06-14 13:51:52,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=933, PETRI_PLACES=75, PETRI_TRANSITIONS=111} [2024-06-14 13:51:52,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-14 13:51:52,368 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 111 transitions, 933 flow [2024-06-14 13:51:52,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:52,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:52,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:52,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:51:52,369 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:52,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:52,369 INFO L85 PathProgramCache]: Analyzing trace with hash 718006803, now seen corresponding path program 2 times [2024-06-14 13:51:52,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:52,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129151288] [2024-06-14 13:51:52,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:52,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:52,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:52,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129151288] [2024-06-14 13:51:52,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129151288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:52,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:52,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:51:52,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592671421] [2024-06-14 13:51:52,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:52,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:51:52,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:52,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:51:52,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:51:52,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:52,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 111 transitions, 933 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:52,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:52,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:52,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:52,961 INFO L124 PetriNetUnfolderBase]: 1300/2138 cut-off events. [2024-06-14 13:51:52,961 INFO L125 PetriNetUnfolderBase]: For 11712/11712 co-relation queries the response was YES. [2024-06-14 13:51:52,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10184 conditions, 2138 events. 1300/2138 cut-off events. For 11712/11712 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11388 event pairs, 281 based on Foata normal form. 4/2138 useless extension candidates. Maximal degree in co-relation 10150. Up to 1616 conditions per place. [2024-06-14 13:51:52,980 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 82 selfloop transitions, 66 changer transitions 0/154 dead transitions. [2024-06-14 13:51:52,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 154 transitions, 1553 flow [2024-06-14 13:51:52,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:51:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:51:52,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:51:52,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-14 13:51:52,982 INFO L175 Difference]: Start difference. First operand has 75 places, 111 transitions, 933 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:51:52,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 154 transitions, 1553 flow [2024-06-14 13:51:52,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 154 transitions, 1521 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-14 13:51:52,999 INFO L231 Difference]: Finished difference. Result has 84 places, 125 transitions, 1259 flow [2024-06-14 13:51:53,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1259, PETRI_PLACES=84, PETRI_TRANSITIONS=125} [2024-06-14 13:51:53,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-14 13:51:53,001 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 125 transitions, 1259 flow [2024-06-14 13:51:53,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:53,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:53,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:53,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:51:53,002 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:53,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:53,003 INFO L85 PathProgramCache]: Analyzing trace with hash 718001223, now seen corresponding path program 3 times [2024-06-14 13:51:53,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:53,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222000916] [2024-06-14 13:51:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:53,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:53,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:53,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222000916] [2024-06-14 13:51:53,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222000916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:53,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:53,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:51:53,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846516608] [2024-06-14 13:51:53,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:53,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:51:53,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:53,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:51:53,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:51:53,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:53,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 125 transitions, 1259 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:53,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:53,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:53,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:53,643 INFO L124 PetriNetUnfolderBase]: 1323/2180 cut-off events. [2024-06-14 13:51:53,643 INFO L125 PetriNetUnfolderBase]: For 15684/15684 co-relation queries the response was YES. [2024-06-14 13:51:53,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11648 conditions, 2180 events. 1323/2180 cut-off events. For 15684/15684 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11653 event pairs, 283 based on Foata normal form. 4/2180 useless extension candidates. Maximal degree in co-relation 11610. Up to 1639 conditions per place. [2024-06-14 13:51:53,662 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 94 selfloop transitions, 69 changer transitions 0/169 dead transitions. [2024-06-14 13:51:53,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 169 transitions, 1897 flow [2024-06-14 13:51:53,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:51:53,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:51:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-14 13:51:53,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-14 13:51:53,664 INFO L175 Difference]: Start difference. First operand has 84 places, 125 transitions, 1259 flow. Second operand 9 states and 215 transitions. [2024-06-14 13:51:53,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 169 transitions, 1897 flow [2024-06-14 13:51:53,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 169 transitions, 1818 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 13:51:53,688 INFO L231 Difference]: Finished difference. Result has 91 places, 133 transitions, 1451 flow [2024-06-14 13:51:53,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1451, PETRI_PLACES=91, PETRI_TRANSITIONS=133} [2024-06-14 13:51:53,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-14 13:51:53,689 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 133 transitions, 1451 flow [2024-06-14 13:51:53,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:53,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:53,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:53,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:51:53,690 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:53,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:53,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1474192437, now seen corresponding path program 4 times [2024-06-14 13:51:53,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:53,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656507805] [2024-06-14 13:51:53,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:53,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:53,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:53,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656507805] [2024-06-14 13:51:53,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656507805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:53,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:53,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:51:53,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589754179] [2024-06-14 13:51:53,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:53,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:51:53,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:53,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:51:53,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:51:53,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:53,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 133 transitions, 1451 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:53,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:53,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:53,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:54,293 INFO L124 PetriNetUnfolderBase]: 1346/2221 cut-off events. [2024-06-14 13:51:54,293 INFO L125 PetriNetUnfolderBase]: For 17363/17363 co-relation queries the response was YES. [2024-06-14 13:51:54,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12088 conditions, 2221 events. 1346/2221 cut-off events. For 17363/17363 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 11948 event pairs, 283 based on Foata normal form. 4/2221 useless extension candidates. Maximal degree in co-relation 12047. Up to 1575 conditions per place. [2024-06-14 13:51:54,312 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 78 selfloop transitions, 96 changer transitions 0/180 dead transitions. [2024-06-14 13:51:54,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 180 transitions, 2137 flow [2024-06-14 13:51:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:51:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:51:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-14 13:51:54,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-14 13:51:54,314 INFO L175 Difference]: Start difference. First operand has 91 places, 133 transitions, 1451 flow. Second operand 9 states and 212 transitions. [2024-06-14 13:51:54,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 180 transitions, 2137 flow [2024-06-14 13:51:54,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 180 transitions, 2001 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 13:51:54,348 INFO L231 Difference]: Finished difference. Result has 97 places, 148 transitions, 1731 flow [2024-06-14 13:51:54,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1731, PETRI_PLACES=97, PETRI_TRANSITIONS=148} [2024-06-14 13:51:54,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-14 13:51:54,350 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 148 transitions, 1731 flow [2024-06-14 13:51:54,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:54,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:54,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:54,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:51:54,351 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:54,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:54,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1457120507, now seen corresponding path program 1 times [2024-06-14 13:51:54,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:54,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297292200] [2024-06-14 13:51:54,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:54,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:54,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:54,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297292200] [2024-06-14 13:51:54,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297292200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:54,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:54,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:51:54,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127416055] [2024-06-14 13:51:54,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:54,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:51:54,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:54,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:51:54,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:51:54,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:51:54,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 148 transitions, 1731 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:54,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:54,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:51:54,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:54,902 INFO L124 PetriNetUnfolderBase]: 1267/2124 cut-off events. [2024-06-14 13:51:54,902 INFO L125 PetriNetUnfolderBase]: For 20521/20542 co-relation queries the response was YES. [2024-06-14 13:51:54,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12290 conditions, 2124 events. 1267/2124 cut-off events. For 20521/20542 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 11674 event pairs, 282 based on Foata normal form. 5/2121 useless extension candidates. Maximal degree in co-relation 12246. Up to 1758 conditions per place. [2024-06-14 13:51:54,923 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 126 selfloop transitions, 12 changer transitions 0/158 dead transitions. [2024-06-14 13:51:54,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 158 transitions, 2057 flow [2024-06-14 13:51:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:51:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:51:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-14 13:51:54,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:51:54,925 INFO L175 Difference]: Start difference. First operand has 97 places, 148 transitions, 1731 flow. Second operand 4 states and 98 transitions. [2024-06-14 13:51:54,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 158 transitions, 2057 flow [2024-06-14 13:51:54,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 158 transitions, 1959 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-14 13:51:54,961 INFO L231 Difference]: Finished difference. Result has 98 places, 148 transitions, 1667 flow [2024-06-14 13:51:54,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1667, PETRI_PLACES=98, PETRI_TRANSITIONS=148} [2024-06-14 13:51:54,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-14 13:51:54,962 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 148 transitions, 1667 flow [2024-06-14 13:51:54,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:54,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:54,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:54,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:51:54,963 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:54,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:54,963 INFO L85 PathProgramCache]: Analyzing trace with hash -190851664, now seen corresponding path program 1 times [2024-06-14 13:51:54,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:54,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388821395] [2024-06-14 13:51:54,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:54,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:55,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:55,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388821395] [2024-06-14 13:51:55,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388821395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:55,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:55,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:55,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138413911] [2024-06-14 13:51:55,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:55,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:55,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:55,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:55,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:55,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:51:55,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 148 transitions, 1667 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:55,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:55,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:51:55,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:55,570 INFO L124 PetriNetUnfolderBase]: 1369/2259 cut-off events. [2024-06-14 13:51:55,571 INFO L125 PetriNetUnfolderBase]: For 24691/24836 co-relation queries the response was YES. [2024-06-14 13:51:55,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13228 conditions, 2259 events. 1369/2259 cut-off events. For 24691/24836 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12222 event pairs, 217 based on Foata normal form. 13/2234 useless extension candidates. Maximal degree in co-relation 13182. Up to 1825 conditions per place. [2024-06-14 13:51:55,591 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 139 selfloop transitions, 22 changer transitions 0/177 dead transitions. [2024-06-14 13:51:55,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 177 transitions, 2195 flow [2024-06-14 13:51:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 13:51:55,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-14 13:51:55,592 INFO L175 Difference]: Start difference. First operand has 98 places, 148 transitions, 1667 flow. Second operand 6 states and 148 transitions. [2024-06-14 13:51:55,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 177 transitions, 2195 flow [2024-06-14 13:51:55,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 177 transitions, 2171 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:51:55,632 INFO L231 Difference]: Finished difference. Result has 101 places, 152 transitions, 1774 flow [2024-06-14 13:51:55,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1774, PETRI_PLACES=101, PETRI_TRANSITIONS=152} [2024-06-14 13:51:55,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-14 13:51:55,634 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 152 transitions, 1774 flow [2024-06-14 13:51:55,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:55,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:55,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:55,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:51:55,635 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:55,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:55,635 INFO L85 PathProgramCache]: Analyzing trace with hash 592410922, now seen corresponding path program 2 times [2024-06-14 13:51:55,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:55,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727158445] [2024-06-14 13:51:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:55,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:55,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:55,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727158445] [2024-06-14 13:51:55,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727158445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:55,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:55,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:55,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088378958] [2024-06-14 13:51:55,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:55,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:55,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:55,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:55,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:55,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:51:55,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 152 transitions, 1774 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:55,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:55,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:51:55,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:56,242 INFO L124 PetriNetUnfolderBase]: 1355/2238 cut-off events. [2024-06-14 13:51:56,242 INFO L125 PetriNetUnfolderBase]: For 26903/27028 co-relation queries the response was YES. [2024-06-14 13:51:56,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13424 conditions, 2238 events. 1355/2238 cut-off events. For 26903/27028 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12126 event pairs, 285 based on Foata normal form. 13/2213 useless extension candidates. Maximal degree in co-relation 13377. Up to 1875 conditions per place. [2024-06-14 13:51:56,265 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 136 selfloop transitions, 18 changer transitions 0/170 dead transitions. [2024-06-14 13:51:56,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 170 transitions, 2146 flow [2024-06-14 13:51:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:51:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:51:56,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 13:51:56,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-14 13:51:56,266 INFO L175 Difference]: Start difference. First operand has 101 places, 152 transitions, 1774 flow. Second operand 5 states and 124 transitions. [2024-06-14 13:51:56,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 170 transitions, 2146 flow [2024-06-14 13:51:56,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 170 transitions, 2086 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-14 13:51:56,309 INFO L231 Difference]: Finished difference. Result has 104 places, 152 transitions, 1758 flow [2024-06-14 13:51:56,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1758, PETRI_PLACES=104, PETRI_TRANSITIONS=152} [2024-06-14 13:51:56,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-14 13:51:56,309 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 152 transitions, 1758 flow [2024-06-14 13:51:56,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:56,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:56,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:56,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:51:56,310 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:56,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:56,311 INFO L85 PathProgramCache]: Analyzing trace with hash -72703534, now seen corresponding path program 3 times [2024-06-14 13:51:56,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:56,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272027384] [2024-06-14 13:51:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:56,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:56,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:56,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272027384] [2024-06-14 13:51:56,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272027384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:56,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:56,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:56,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142525586] [2024-06-14 13:51:56,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:56,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:56,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:56,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:56,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:56,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:51:56,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 152 transitions, 1758 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:56,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:56,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:51:56,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:56,825 INFO L124 PetriNetUnfolderBase]: 1341/2218 cut-off events. [2024-06-14 13:51:56,826 INFO L125 PetriNetUnfolderBase]: For 27353/27467 co-relation queries the response was YES. [2024-06-14 13:51:56,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13238 conditions, 2218 events. 1341/2218 cut-off events. For 27353/27467 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12027 event pairs, 281 based on Foata normal form. 17/2198 useless extension candidates. Maximal degree in co-relation 13189. Up to 1840 conditions per place. [2024-06-14 13:51:56,845 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 139 selfloop transitions, 21 changer transitions 0/176 dead transitions. [2024-06-14 13:51:56,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 176 transitions, 2194 flow [2024-06-14 13:51:56,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 13:51:56,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-14 13:51:56,847 INFO L175 Difference]: Start difference. First operand has 104 places, 152 transitions, 1758 flow. Second operand 6 states and 145 transitions. [2024-06-14 13:51:56,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 176 transitions, 2194 flow [2024-06-14 13:51:56,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 176 transitions, 2153 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 13:51:56,891 INFO L231 Difference]: Finished difference. Result has 106 places, 154 transitions, 1812 flow [2024-06-14 13:51:56,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1812, PETRI_PLACES=106, PETRI_TRANSITIONS=154} [2024-06-14 13:51:56,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-14 13:51:56,892 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 154 transitions, 1812 flow [2024-06-14 13:51:56,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:56,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:56,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:56,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:51:56,894 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:56,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:56,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1544666658, now seen corresponding path program 1 times [2024-06-14 13:51:56,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:56,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101035187] [2024-06-14 13:51:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:56,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:57,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:57,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101035187] [2024-06-14 13:51:57,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101035187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:57,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:57,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:51:57,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84027445] [2024-06-14 13:51:57,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:57,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:51:57,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:57,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:51:57,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:51:57,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:57,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 154 transitions, 1812 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:57,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:57,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:57,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:57,491 INFO L124 PetriNetUnfolderBase]: 1437/2373 cut-off events. [2024-06-14 13:51:57,491 INFO L125 PetriNetUnfolderBase]: For 29684/29686 co-relation queries the response was YES. [2024-06-14 13:51:57,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13961 conditions, 2373 events. 1437/2373 cut-off events. For 29684/29686 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12986 event pairs, 259 based on Foata normal form. 16/2387 useless extension candidates. Maximal degree in co-relation 13911. Up to 1876 conditions per place. [2024-06-14 13:51:57,510 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 138 selfloop transitions, 50 changer transitions 0/194 dead transitions. [2024-06-14 13:51:57,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 194 transitions, 2495 flow [2024-06-14 13:51:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:51:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:51:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-14 13:51:57,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-14 13:51:57,512 INFO L175 Difference]: Start difference. First operand has 106 places, 154 transitions, 1812 flow. Second operand 9 states and 209 transitions. [2024-06-14 13:51:57,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 194 transitions, 2495 flow [2024-06-14 13:51:57,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 194 transitions, 2430 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:51:57,561 INFO L231 Difference]: Finished difference. Result has 111 places, 157 transitions, 1914 flow [2024-06-14 13:51:57,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1914, PETRI_PLACES=111, PETRI_TRANSITIONS=157} [2024-06-14 13:51:57,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-14 13:51:57,561 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 157 transitions, 1914 flow [2024-06-14 13:51:57,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:57,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:57,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:57,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:51:57,562 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:57,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:57,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1536095778, now seen corresponding path program 2 times [2024-06-14 13:51:57,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:57,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752298220] [2024-06-14 13:51:57,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:57,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:57,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:57,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752298220] [2024-06-14 13:51:57,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752298220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:57,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:57,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:51:57,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595475273] [2024-06-14 13:51:57,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:57,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:51:57,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:57,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:51:57,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:51:57,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:57,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 157 transitions, 1914 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:57,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:57,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:57,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:58,179 INFO L124 PetriNetUnfolderBase]: 1521/2505 cut-off events. [2024-06-14 13:51:58,179 INFO L125 PetriNetUnfolderBase]: For 33889/33891 co-relation queries the response was YES. [2024-06-14 13:51:58,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14992 conditions, 2505 events. 1521/2505 cut-off events. For 33889/33891 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13836 event pairs, 234 based on Foata normal form. 16/2519 useless extension candidates. Maximal degree in co-relation 14941. Up to 1706 conditions per place. [2024-06-14 13:51:58,198 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 141 selfloop transitions, 56 changer transitions 0/203 dead transitions. [2024-06-14 13:51:58,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 203 transitions, 2695 flow [2024-06-14 13:51:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:51:58,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:51:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 13:51:58,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 13:51:58,200 INFO L175 Difference]: Start difference. First operand has 111 places, 157 transitions, 1914 flow. Second operand 9 states and 213 transitions. [2024-06-14 13:51:58,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 203 transitions, 2695 flow [2024-06-14 13:51:58,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 203 transitions, 2558 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:51:58,255 INFO L231 Difference]: Finished difference. Result has 113 places, 161 transitions, 1969 flow [2024-06-14 13:51:58,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1777, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1969, PETRI_PLACES=113, PETRI_TRANSITIONS=161} [2024-06-14 13:51:58,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-14 13:51:58,255 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 161 transitions, 1969 flow [2024-06-14 13:51:58,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:58,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:58,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:58,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:51:58,256 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:58,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:58,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1898969444, now seen corresponding path program 1 times [2024-06-14 13:51:58,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:58,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476878345] [2024-06-14 13:51:58,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:58,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:58,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:58,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476878345] [2024-06-14 13:51:58,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476878345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:58,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:58,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:51:58,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107833754] [2024-06-14 13:51:58,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:58,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:51:58,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:58,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:51:58,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:51:58,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:58,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 161 transitions, 1969 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:51:58,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:58,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:58,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:59,200 INFO L124 PetriNetUnfolderBase]: 2494/4170 cut-off events. [2024-06-14 13:51:59,200 INFO L125 PetriNetUnfolderBase]: For 68401/68401 co-relation queries the response was YES. [2024-06-14 13:51:59,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24242 conditions, 4170 events. 2494/4170 cut-off events. For 68401/68401 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25952 event pairs, 387 based on Foata normal form. 54/4220 useless extension candidates. Maximal degree in co-relation 24190. Up to 2133 conditions per place. [2024-06-14 13:51:59,229 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 180 selfloop transitions, 49 changer transitions 0/235 dead transitions. [2024-06-14 13:51:59,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 235 transitions, 3129 flow [2024-06-14 13:51:59,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:51:59,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:51:59,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 13:51:59,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432926829268293 [2024-06-14 13:51:59,231 INFO L175 Difference]: Start difference. First operand has 113 places, 161 transitions, 1969 flow. Second operand 8 states and 211 transitions. [2024-06-14 13:51:59,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 235 transitions, 3129 flow [2024-06-14 13:51:59,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 235 transitions, 3021 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 13:51:59,309 INFO L231 Difference]: Finished difference. Result has 118 places, 180 transitions, 2288 flow [2024-06-14 13:51:59,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2288, PETRI_PLACES=118, PETRI_TRANSITIONS=180} [2024-06-14 13:51:59,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-14 13:51:59,310 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 180 transitions, 2288 flow [2024-06-14 13:51:59,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:51:59,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:59,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:59,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:51:59,311 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:59,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:59,312 INFO L85 PathProgramCache]: Analyzing trace with hash 329117230, now seen corresponding path program 2 times [2024-06-14 13:51:59,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:59,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471279402] [2024-06-14 13:51:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:59,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:59,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:59,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471279402] [2024-06-14 13:51:59,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471279402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:59,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:59,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:51:59,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853661023] [2024-06-14 13:51:59,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:59,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:51:59,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:59,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:51:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:51:59,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:59,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 180 transitions, 2288 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:51:59,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:59,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:59,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:00,198 INFO L124 PetriNetUnfolderBase]: 2643/4435 cut-off events. [2024-06-14 13:52:00,198 INFO L125 PetriNetUnfolderBase]: For 77726/77726 co-relation queries the response was YES. [2024-06-14 13:52:00,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26552 conditions, 4435 events. 2643/4435 cut-off events. For 77726/77726 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28176 event pairs, 666 based on Foata normal form. 50/4475 useless extension candidates. Maximal degree in co-relation 26496. Up to 3502 conditions per place. [2024-06-14 13:52:00,233 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 162 selfloop transitions, 44 changer transitions 0/212 dead transitions. [2024-06-14 13:52:00,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 212 transitions, 2919 flow [2024-06-14 13:52:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 13:52:00,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:52:00,234 INFO L175 Difference]: Start difference. First operand has 118 places, 180 transitions, 2288 flow. Second operand 7 states and 175 transitions. [2024-06-14 13:52:00,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 212 transitions, 2919 flow [2024-06-14 13:52:00,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 212 transitions, 2763 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:00,347 INFO L231 Difference]: Finished difference. Result has 122 places, 183 transitions, 2306 flow [2024-06-14 13:52:00,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2134, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2306, PETRI_PLACES=122, PETRI_TRANSITIONS=183} [2024-06-14 13:52:00,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-14 13:52:00,347 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 183 transitions, 2306 flow [2024-06-14 13:52:00,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:00,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:00,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:00,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:52:00,348 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:00,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:00,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1184870660, now seen corresponding path program 3 times [2024-06-14 13:52:00,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:00,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093314825] [2024-06-14 13:52:00,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:00,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:00,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:00,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093314825] [2024-06-14 13:52:00,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093314825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:00,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:00,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:00,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902657319] [2024-06-14 13:52:00,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:00,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:00,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:00,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:00,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:00,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:00,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 183 transitions, 2306 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:00,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:00,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:00,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:01,221 INFO L124 PetriNetUnfolderBase]: 2754/4678 cut-off events. [2024-06-14 13:52:01,222 INFO L125 PetriNetUnfolderBase]: For 78613/78613 co-relation queries the response was YES. [2024-06-14 13:52:01,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26902 conditions, 4678 events. 2754/4678 cut-off events. For 78613/78613 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30446 event pairs, 685 based on Foata normal form. 54/4728 useless extension candidates. Maximal degree in co-relation 26844. Up to 2904 conditions per place. [2024-06-14 13:52:01,261 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 178 selfloop transitions, 45 changer transitions 0/229 dead transitions. [2024-06-14 13:52:01,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 229 transitions, 3164 flow [2024-06-14 13:52:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 13:52:01,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-14 13:52:01,262 INFO L175 Difference]: Start difference. First operand has 122 places, 183 transitions, 2306 flow. Second operand 7 states and 180 transitions. [2024-06-14 13:52:01,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 229 transitions, 3164 flow [2024-06-14 13:52:01,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 229 transitions, 3047 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:01,443 INFO L231 Difference]: Finished difference. Result has 125 places, 192 transitions, 2487 flow [2024-06-14 13:52:01,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2189, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2487, PETRI_PLACES=125, PETRI_TRANSITIONS=192} [2024-06-14 13:52:01,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-14 13:52:01,444 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 192 transitions, 2487 flow [2024-06-14 13:52:01,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:01,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:01,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:01,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:52:01,445 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:01,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:01,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1485161518, now seen corresponding path program 4 times [2024-06-14 13:52:01,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:01,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980261935] [2024-06-14 13:52:01,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:01,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:01,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:01,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980261935] [2024-06-14 13:52:01,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980261935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:01,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:01,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:01,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018640726] [2024-06-14 13:52:01,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:01,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:01,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:01,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:01,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:01,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:01,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 192 transitions, 2487 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:01,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:01,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:01,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:02,388 INFO L124 PetriNetUnfolderBase]: 2941/4998 cut-off events. [2024-06-14 13:52:02,389 INFO L125 PetriNetUnfolderBase]: For 88299/88299 co-relation queries the response was YES. [2024-06-14 13:52:02,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28857 conditions, 4998 events. 2941/4998 cut-off events. For 88299/88299 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33061 event pairs, 955 based on Foata normal form. 50/5044 useless extension candidates. Maximal degree in co-relation 28797. Up to 3994 conditions per place. [2024-06-14 13:52:02,427 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 147 selfloop transitions, 76 changer transitions 0/229 dead transitions. [2024-06-14 13:52:02,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 229 transitions, 3217 flow [2024-06-14 13:52:02,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-14 13:52:02,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-14 13:52:02,428 INFO L175 Difference]: Start difference. First operand has 125 places, 192 transitions, 2487 flow. Second operand 9 states and 214 transitions. [2024-06-14 13:52:02,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 229 transitions, 3217 flow [2024-06-14 13:52:02,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 229 transitions, 3103 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:02,580 INFO L231 Difference]: Finished difference. Result has 131 places, 194 transitions, 2600 flow [2024-06-14 13:52:02,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2600, PETRI_PLACES=131, PETRI_TRANSITIONS=194} [2024-06-14 13:52:02,581 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-14 13:52:02,581 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 194 transitions, 2600 flow [2024-06-14 13:52:02,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:02,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:02,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:02,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:52:02,582 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:02,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:02,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1490523898, now seen corresponding path program 5 times [2024-06-14 13:52:02,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:02,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765439426] [2024-06-14 13:52:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:02,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:02,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:02,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765439426] [2024-06-14 13:52:02,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765439426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:02,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:02,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:02,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628033598] [2024-06-14 13:52:02,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:02,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:02,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:02,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:02,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:02,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:02,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 194 transitions, 2600 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:02,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:02,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:02,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:03,636 INFO L124 PetriNetUnfolderBase]: 3128/5330 cut-off events. [2024-06-14 13:52:03,637 INFO L125 PetriNetUnfolderBase]: For 96966/96966 co-relation queries the response was YES. [2024-06-14 13:52:03,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30541 conditions, 5330 events. 3128/5330 cut-off events. For 96966/96966 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35810 event pairs, 1030 based on Foata normal form. 50/5376 useless extension candidates. Maximal degree in co-relation 30479. Up to 4315 conditions per place. [2024-06-14 13:52:03,684 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 162 selfloop transitions, 71 changer transitions 0/239 dead transitions. [2024-06-14 13:52:03,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 239 transitions, 3404 flow [2024-06-14 13:52:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:52:03,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:52:03,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-14 13:52:03,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829268292682926 [2024-06-14 13:52:03,686 INFO L175 Difference]: Start difference. First operand has 131 places, 194 transitions, 2600 flow. Second operand 10 states and 239 transitions. [2024-06-14 13:52:03,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 239 transitions, 3404 flow [2024-06-14 13:52:03,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 239 transitions, 3235 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:03,859 INFO L231 Difference]: Finished difference. Result has 135 places, 196 transitions, 2652 flow [2024-06-14 13:52:03,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2652, PETRI_PLACES=135, PETRI_TRANSITIONS=196} [2024-06-14 13:52:03,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-14 13:52:03,860 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 196 transitions, 2652 flow [2024-06-14 13:52:03,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:03,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:03,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:03,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:52:03,861 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:03,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:03,862 INFO L85 PathProgramCache]: Analyzing trace with hash 2041159004, now seen corresponding path program 6 times [2024-06-14 13:52:03,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:03,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921210893] [2024-06-14 13:52:03,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:03,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:04,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:04,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921210893] [2024-06-14 13:52:04,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921210893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:04,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:04,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:04,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770359783] [2024-06-14 13:52:04,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:04,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:04,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:04,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:04,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:04,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:04,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 196 transitions, 2652 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:04,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:04,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:04,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:04,971 INFO L124 PetriNetUnfolderBase]: 3460/5930 cut-off events. [2024-06-14 13:52:04,972 INFO L125 PetriNetUnfolderBase]: For 112295/112295 co-relation queries the response was YES. [2024-06-14 13:52:05,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33717 conditions, 5930 events. 3460/5930 cut-off events. For 112295/112295 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 41019 event pairs, 1126 based on Foata normal form. 42/5968 useless extension candidates. Maximal degree in co-relation 33654. Up to 3938 conditions per place. [2024-06-14 13:52:05,021 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 172 selfloop transitions, 74 changer transitions 0/252 dead transitions. [2024-06-14 13:52:05,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 252 transitions, 3646 flow [2024-06-14 13:52:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:52:05,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:52:05,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-14 13:52:05,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-14 13:52:05,023 INFO L175 Difference]: Start difference. First operand has 135 places, 196 transitions, 2652 flow. Second operand 10 states and 244 transitions. [2024-06-14 13:52:05,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 252 transitions, 3646 flow [2024-06-14 13:52:05,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 252 transitions, 3455 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:05,204 INFO L231 Difference]: Finished difference. Result has 138 places, 201 transitions, 2769 flow [2024-06-14 13:52:05,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2769, PETRI_PLACES=138, PETRI_TRANSITIONS=201} [2024-06-14 13:52:05,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-14 13:52:05,210 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 201 transitions, 2769 flow [2024-06-14 13:52:05,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:05,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:05,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:05,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:52:05,211 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:05,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:05,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2046884456, now seen corresponding path program 1 times [2024-06-14 13:52:05,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:05,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912586183] [2024-06-14 13:52:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:05,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:05,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:05,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912586183] [2024-06-14 13:52:05,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912586183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:05,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:05,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:05,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129471057] [2024-06-14 13:52:05,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:05,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:05,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:05,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:05,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:05,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 201 transitions, 2769 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:05,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:05,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:05,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:06,419 INFO L124 PetriNetUnfolderBase]: 3784/6485 cut-off events. [2024-06-14 13:52:06,420 INFO L125 PetriNetUnfolderBase]: For 136986/136986 co-relation queries the response was YES. [2024-06-14 13:52:06,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37339 conditions, 6485 events. 3784/6485 cut-off events. For 136986/136986 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 45872 event pairs, 1089 based on Foata normal form. 42/6511 useless extension candidates. Maximal degree in co-relation 37274. Up to 3946 conditions per place. [2024-06-14 13:52:06,469 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 151 selfloop transitions, 89 changer transitions 0/246 dead transitions. [2024-06-14 13:52:06,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 246 transitions, 3695 flow [2024-06-14 13:52:06,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-14 13:52:06,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962059620596206 [2024-06-14 13:52:06,473 INFO L175 Difference]: Start difference. First operand has 138 places, 201 transitions, 2769 flow. Second operand 9 states and 220 transitions. [2024-06-14 13:52:06,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 246 transitions, 3695 flow [2024-06-14 13:52:06,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 246 transitions, 3489 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:06,743 INFO L231 Difference]: Finished difference. Result has 140 places, 204 transitions, 2873 flow [2024-06-14 13:52:06,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2873, PETRI_PLACES=140, PETRI_TRANSITIONS=204} [2024-06-14 13:52:06,757 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-14 13:52:06,757 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 204 transitions, 2873 flow [2024-06-14 13:52:06,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:06,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:06,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:06,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:52:06,758 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:06,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:06,758 INFO L85 PathProgramCache]: Analyzing trace with hash -640240268, now seen corresponding path program 7 times [2024-06-14 13:52:06,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:06,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954261059] [2024-06-14 13:52:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:06,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:07,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:07,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954261059] [2024-06-14 13:52:07,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954261059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:07,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:07,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:07,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060571153] [2024-06-14 13:52:07,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:07,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:07,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:07,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:07,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:07,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:07,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 204 transitions, 2873 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:07,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:07,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:07,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:08,024 INFO L124 PetriNetUnfolderBase]: 3946/6774 cut-off events. [2024-06-14 13:52:08,025 INFO L125 PetriNetUnfolderBase]: For 147902/147902 co-relation queries the response was YES. [2024-06-14 13:52:08,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38870 conditions, 6774 events. 3946/6774 cut-off events. For 147902/147902 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 48351 event pairs, 1464 based on Foata normal form. 50/6820 useless extension candidates. Maximal degree in co-relation 38804. Up to 5594 conditions per place. [2024-06-14 13:52:08,079 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 142 selfloop transitions, 98 changer transitions 0/246 dead transitions. [2024-06-14 13:52:08,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 246 transitions, 3743 flow [2024-06-14 13:52:08,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:52:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:52:08,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-14 13:52:08,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780487804878048 [2024-06-14 13:52:08,081 INFO L175 Difference]: Start difference. First operand has 140 places, 204 transitions, 2873 flow. Second operand 10 states and 237 transitions. [2024-06-14 13:52:08,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 246 transitions, 3743 flow [2024-06-14 13:52:08,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 246 transitions, 3578 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:08,275 INFO L231 Difference]: Finished difference. Result has 145 places, 206 transitions, 2997 flow [2024-06-14 13:52:08,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2997, PETRI_PLACES=145, PETRI_TRANSITIONS=206} [2024-06-14 13:52:08,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-14 13:52:08,276 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 206 transitions, 2997 flow [2024-06-14 13:52:08,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:08,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:08,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:08,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:52:08,277 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:08,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:08,277 INFO L85 PathProgramCache]: Analyzing trace with hash 833222354, now seen corresponding path program 2 times [2024-06-14 13:52:08,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:08,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292838942] [2024-06-14 13:52:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:08,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:08,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:08,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292838942] [2024-06-14 13:52:08,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292838942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:08,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:08,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:08,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686204291] [2024-06-14 13:52:08,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:08,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:08,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:08,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:08,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:08,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:08,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 206 transitions, 2997 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:08,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:08,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:08,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:09,522 INFO L124 PetriNetUnfolderBase]: 4097/7077 cut-off events. [2024-06-14 13:52:09,522 INFO L125 PetriNetUnfolderBase]: For 155302/155302 co-relation queries the response was YES. [2024-06-14 13:52:09,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40626 conditions, 7077 events. 4097/7077 cut-off events. For 155302/155302 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 51272 event pairs, 1464 based on Foata normal form. 42/7115 useless extension candidates. Maximal degree in co-relation 40558. Up to 5512 conditions per place. [2024-06-14 13:52:09,576 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 146 selfloop transitions, 102 changer transitions 0/254 dead transitions. [2024-06-14 13:52:09,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 254 transitions, 3929 flow [2024-06-14 13:52:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:52:09,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:52:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-14 13:52:09,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-14 13:52:09,578 INFO L175 Difference]: Start difference. First operand has 145 places, 206 transitions, 2997 flow. Second operand 10 states and 242 transitions. [2024-06-14 13:52:09,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 254 transitions, 3929 flow [2024-06-14 13:52:09,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 254 transitions, 3670 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:09,817 INFO L231 Difference]: Finished difference. Result has 147 places, 208 transitions, 3037 flow [2024-06-14 13:52:09,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2738, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3037, PETRI_PLACES=147, PETRI_TRANSITIONS=208} [2024-06-14 13:52:09,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-14 13:52:09,817 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 208 transitions, 3037 flow [2024-06-14 13:52:09,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:09,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:09,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:09,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:52:09,818 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:09,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:09,819 INFO L85 PathProgramCache]: Analyzing trace with hash -374327786, now seen corresponding path program 3 times [2024-06-14 13:52:09,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:09,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593607588] [2024-06-14 13:52:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:09,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:10,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:10,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593607588] [2024-06-14 13:52:10,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593607588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:10,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:10,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:10,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810552135] [2024-06-14 13:52:10,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:10,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:10,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:10,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:10,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:10,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:10,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 208 transitions, 3037 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:10,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:10,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:10,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:11,148 INFO L124 PetriNetUnfolderBase]: 4314/7451 cut-off events. [2024-06-14 13:52:11,149 INFO L125 PetriNetUnfolderBase]: For 170777/170777 co-relation queries the response was YES. [2024-06-14 13:52:11,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42344 conditions, 7451 events. 4314/7451 cut-off events. For 170777/170777 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 54473 event pairs, 1402 based on Foata normal form. 42/7483 useless extension candidates. Maximal degree in co-relation 42275. Up to 3416 conditions per place. [2024-06-14 13:52:11,218 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 134 selfloop transitions, 119 changer transitions 0/259 dead transitions. [2024-06-14 13:52:11,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 259 transitions, 3975 flow [2024-06-14 13:52:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:52:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:52:11,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-14 13:52:11,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-14 13:52:11,219 INFO L175 Difference]: Start difference. First operand has 147 places, 208 transitions, 3037 flow. Second operand 10 states and 244 transitions. [2024-06-14 13:52:11,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 259 transitions, 3975 flow [2024-06-14 13:52:11,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 259 transitions, 3702 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:11,546 INFO L231 Difference]: Finished difference. Result has 148 places, 209 transitions, 3045 flow [2024-06-14 13:52:11,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2710, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3045, PETRI_PLACES=148, PETRI_TRANSITIONS=209} [2024-06-14 13:52:11,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-14 13:52:11,548 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 209 transitions, 3045 flow [2024-06-14 13:52:11,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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) [2024-06-14 13:52:11,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:11,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:11,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:52:11,548 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:11,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:11,549 INFO L85 PathProgramCache]: Analyzing trace with hash -133447772, now seen corresponding path program 1 times [2024-06-14 13:52:11,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:11,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038046742] [2024-06-14 13:52:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:11,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:11,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:11,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038046742] [2024-06-14 13:52:11,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038046742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:11,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:11,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:11,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971440265] [2024-06-14 13:52:11,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:11,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:11,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:11,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:11,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:11,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:11,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 209 transitions, 3045 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:11,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:11,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:11,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:12,689 INFO L124 PetriNetUnfolderBase]: 4100/7147 cut-off events. [2024-06-14 13:52:12,690 INFO L125 PetriNetUnfolderBase]: For 160102/160120 co-relation queries the response was YES. [2024-06-14 13:52:12,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40927 conditions, 7147 events. 4100/7147 cut-off events. For 160102/160120 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 53090 event pairs, 1652 based on Foata normal form. 7/7064 useless extension candidates. Maximal degree in co-relation 40857. Up to 6424 conditions per place. [2024-06-14 13:52:12,752 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 172 selfloop transitions, 17 changer transitions 0/218 dead transitions. [2024-06-14 13:52:12,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 218 transitions, 3445 flow [2024-06-14 13:52:12,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:12,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:12,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-14 13:52:12,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:52:12,753 INFO L175 Difference]: Start difference. First operand has 148 places, 209 transitions, 3045 flow. Second operand 5 states and 115 transitions. [2024-06-14 13:52:12,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 218 transitions, 3445 flow [2024-06-14 13:52:13,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 218 transitions, 3120 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:13,127 INFO L231 Difference]: Finished difference. Result has 145 places, 209 transitions, 2762 flow [2024-06-14 13:52:13,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2762, PETRI_PLACES=145, PETRI_TRANSITIONS=209} [2024-06-14 13:52:13,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-14 13:52:13,128 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 209 transitions, 2762 flow [2024-06-14 13:52:13,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:13,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:13,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:13,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:52:13,129 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:13,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:13,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2123651450, now seen corresponding path program 1 times [2024-06-14 13:52:13,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:13,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770146330] [2024-06-14 13:52:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:13,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:13,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:13,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770146330] [2024-06-14 13:52:13,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770146330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:13,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:13,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:13,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941677169] [2024-06-14 13:52:13,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:13,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:13,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:13,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:13,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:13,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:13,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 209 transitions, 2762 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:13,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:13,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:13,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:14,173 INFO L124 PetriNetUnfolderBase]: 4191/7265 cut-off events. [2024-06-14 13:52:14,173 INFO L125 PetriNetUnfolderBase]: For 149847/149849 co-relation queries the response was YES. [2024-06-14 13:52:14,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40241 conditions, 7265 events. 4191/7265 cut-off events. For 149847/149849 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 53122 event pairs, 1604 based on Foata normal form. 4/7267 useless extension candidates. Maximal degree in co-relation 40170. Up to 6587 conditions per place. [2024-06-14 13:52:14,234 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 43 changer transitions 0/240 dead transitions. [2024-06-14 13:52:14,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 240 transitions, 3533 flow [2024-06-14 13:52:14,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:14,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 13:52:14,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 13:52:14,235 INFO L175 Difference]: Start difference. First operand has 145 places, 209 transitions, 2762 flow. Second operand 8 states and 177 transitions. [2024-06-14 13:52:14,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 240 transitions, 3533 flow [2024-06-14 13:52:14,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 240 transitions, 3475 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:14,464 INFO L231 Difference]: Finished difference. Result has 149 places, 217 transitions, 2957 flow [2024-06-14 13:52:14,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2704, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2957, PETRI_PLACES=149, PETRI_TRANSITIONS=217} [2024-06-14 13:52:14,465 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-14 13:52:14,465 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 217 transitions, 2957 flow [2024-06-14 13:52:14,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:14,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:14,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:14,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:52:14,466 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:14,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:14,466 INFO L85 PathProgramCache]: Analyzing trace with hash -133678970, now seen corresponding path program 1 times [2024-06-14 13:52:14,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:14,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999403996] [2024-06-14 13:52:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:14,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:14,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:14,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999403996] [2024-06-14 13:52:14,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999403996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:14,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:14,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:14,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447468073] [2024-06-14 13:52:14,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:14,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:14,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:14,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:14,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:14,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:14,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 217 transitions, 2957 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:14,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:14,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:14,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:15,496 INFO L124 PetriNetUnfolderBase]: 4159/7211 cut-off events. [2024-06-14 13:52:15,497 INFO L125 PetriNetUnfolderBase]: For 161593/161595 co-relation queries the response was YES. [2024-06-14 13:52:15,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41440 conditions, 7211 events. 4159/7211 cut-off events. For 161593/161595 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 52642 event pairs, 1621 based on Foata normal form. 10/7219 useless extension candidates. Maximal degree in co-relation 41368. Up to 6553 conditions per place. [2024-06-14 13:52:15,561 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 199 selfloop transitions, 35 changer transitions 3/243 dead transitions. [2024-06-14 13:52:15,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 243 transitions, 3701 flow [2024-06-14 13:52:15,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 13:52:15,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-14 13:52:15,562 INFO L175 Difference]: Start difference. First operand has 149 places, 217 transitions, 2957 flow. Second operand 7 states and 160 transitions. [2024-06-14 13:52:15,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 243 transitions, 3701 flow [2024-06-14 13:52:15,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 243 transitions, 3589 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:15,837 INFO L231 Difference]: Finished difference. Result has 152 places, 218 transitions, 2952 flow [2024-06-14 13:52:15,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2846, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2952, PETRI_PLACES=152, PETRI_TRANSITIONS=218} [2024-06-14 13:52:15,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-14 13:52:15,838 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 218 transitions, 2952 flow [2024-06-14 13:52:15,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:15,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:15,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:15,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:52:15,839 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:15,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:15,839 INFO L85 PathProgramCache]: Analyzing trace with hash -133441820, now seen corresponding path program 2 times [2024-06-14 13:52:15,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:15,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581627826] [2024-06-14 13:52:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:15,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:16,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:16,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581627826] [2024-06-14 13:52:16,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581627826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:16,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:16,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:16,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560661661] [2024-06-14 13:52:16,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:16,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:16,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:16,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:16,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:16,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:16,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 218 transitions, 2952 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:16,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:16,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:16,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:16,836 INFO L124 PetriNetUnfolderBase]: 3913/6752 cut-off events. [2024-06-14 13:52:16,837 INFO L125 PetriNetUnfolderBase]: For 164215/164235 co-relation queries the response was YES. [2024-06-14 13:52:16,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39429 conditions, 6752 events. 3913/6752 cut-off events. For 164215/164235 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 48384 event pairs, 1507 based on Foata normal form. 16/6763 useless extension candidates. Maximal degree in co-relation 39355. Up to 6122 conditions per place. [2024-06-14 13:52:16,896 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 33 changer transitions 5/235 dead transitions. [2024-06-14 13:52:16,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 235 transitions, 3517 flow [2024-06-14 13:52:16,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 13:52:16,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 13:52:16,897 INFO L175 Difference]: Start difference. First operand has 152 places, 218 transitions, 2952 flow. Second operand 6 states and 137 transitions. [2024-06-14 13:52:16,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 235 transitions, 3517 flow [2024-06-14 13:52:17,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 235 transitions, 3473 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:17,259 INFO L231 Difference]: Finished difference. Result has 154 places, 213 transitions, 2896 flow [2024-06-14 13:52:17,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2908, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2896, PETRI_PLACES=154, PETRI_TRANSITIONS=213} [2024-06-14 13:52:17,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-14 13:52:17,259 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 213 transitions, 2896 flow [2024-06-14 13:52:17,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:17,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:17,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:17,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:52:17,260 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:17,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:17,260 INFO L85 PathProgramCache]: Analyzing trace with hash -133432892, now seen corresponding path program 1 times [2024-06-14 13:52:17,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:17,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307560389] [2024-06-14 13:52:17,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:17,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:17,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:17,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307560389] [2024-06-14 13:52:17,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307560389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:17,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:17,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:17,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784212354] [2024-06-14 13:52:17,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:17,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:17,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:17,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:17,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:17,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:17,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 213 transitions, 2896 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:17,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:17,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:17,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:18,178 INFO L124 PetriNetUnfolderBase]: 3305/5741 cut-off events. [2024-06-14 13:52:18,179 INFO L125 PetriNetUnfolderBase]: For 172165/172173 co-relation queries the response was YES. [2024-06-14 13:52:18,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35199 conditions, 5741 events. 3305/5741 cut-off events. For 172165/172173 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 40327 event pairs, 1184 based on Foata normal form. 18/5728 useless extension candidates. Maximal degree in co-relation 35124. Up to 5043 conditions per place. [2024-06-14 13:52:18,230 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 181 selfloop transitions, 15 changer transitions 0/228 dead transitions. [2024-06-14 13:52:18,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 228 transitions, 3358 flow [2024-06-14 13:52:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 13:52:18,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-14 13:52:18,232 INFO L175 Difference]: Start difference. First operand has 154 places, 213 transitions, 2896 flow. Second operand 5 states and 118 transitions. [2024-06-14 13:52:18,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 228 transitions, 3358 flow [2024-06-14 13:52:18,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 228 transitions, 3227 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:18,555 INFO L231 Difference]: Finished difference. Result has 153 places, 215 transitions, 2829 flow [2024-06-14 13:52:18,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2765, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2829, PETRI_PLACES=153, PETRI_TRANSITIONS=215} [2024-06-14 13:52:18,556 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-14 13:52:18,556 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 215 transitions, 2829 flow [2024-06-14 13:52:18,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:18,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:18,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:18,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:52:18,557 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:18,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:18,557 INFO L85 PathProgramCache]: Analyzing trace with hash -965069260, now seen corresponding path program 1 times [2024-06-14 13:52:18,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:18,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149581434] [2024-06-14 13:52:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:18,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:18,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:18,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149581434] [2024-06-14 13:52:18,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149581434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:18,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:18,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:18,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093039491] [2024-06-14 13:52:18,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:18,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:18,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:18,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:18,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:18,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:18,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 215 transitions, 2829 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:18,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:18,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:18,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:19,649 INFO L124 PetriNetUnfolderBase]: 3435/5919 cut-off events. [2024-06-14 13:52:19,650 INFO L125 PetriNetUnfolderBase]: For 160923/160925 co-relation queries the response was YES. [2024-06-14 13:52:19,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35800 conditions, 5919 events. 3435/5919 cut-off events. For 160923/160925 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 41062 event pairs, 1242 based on Foata normal form. 4/5921 useless extension candidates. Maximal degree in co-relation 35724. Up to 5330 conditions per place. [2024-06-14 13:52:19,707 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 190 selfloop transitions, 42 changer transitions 0/238 dead transitions. [2024-06-14 13:52:19,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 238 transitions, 3414 flow [2024-06-14 13:52:19,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:19,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:19,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 13:52:19,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 13:52:19,708 INFO L175 Difference]: Start difference. First operand has 153 places, 215 transitions, 2829 flow. Second operand 9 states and 192 transitions. [2024-06-14 13:52:19,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 238 transitions, 3414 flow [2024-06-14 13:52:19,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 238 transitions, 3372 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:19,991 INFO L231 Difference]: Finished difference. Result has 159 places, 215 transitions, 2878 flow [2024-06-14 13:52:19,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2878, PETRI_PLACES=159, PETRI_TRANSITIONS=215} [2024-06-14 13:52:19,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-14 13:52:19,992 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 215 transitions, 2878 flow [2024-06-14 13:52:19,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:19,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:19,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:19,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:52:19,993 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:19,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:19,993 INFO L85 PathProgramCache]: Analyzing trace with hash 136183403, now seen corresponding path program 1 times [2024-06-14 13:52:19,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:19,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589801115] [2024-06-14 13:52:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:19,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:20,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:20,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589801115] [2024-06-14 13:52:20,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589801115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:20,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:20,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:20,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864965673] [2024-06-14 13:52:20,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:20,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:20,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:20,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:20,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:20,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:20,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 215 transitions, 2878 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:20,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:20,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:20,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:21,112 INFO L124 PetriNetUnfolderBase]: 3440/5928 cut-off events. [2024-06-14 13:52:21,112 INFO L125 PetriNetUnfolderBase]: For 169376/169378 co-relation queries the response was YES. [2024-06-14 13:52:21,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36219 conditions, 5928 events. 3440/5928 cut-off events. For 169376/169378 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 41219 event pairs, 1230 based on Foata normal form. 3/5929 useless extension candidates. Maximal degree in co-relation 36142. Up to 5281 conditions per place. [2024-06-14 13:52:21,166 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 189 selfloop transitions, 58 changer transitions 0/253 dead transitions. [2024-06-14 13:52:21,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 253 transitions, 3891 flow [2024-06-14 13:52:21,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:21,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:21,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 13:52:21,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-14 13:52:21,168 INFO L175 Difference]: Start difference. First operand has 159 places, 215 transitions, 2878 flow. Second operand 9 states and 199 transitions. [2024-06-14 13:52:21,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 253 transitions, 3891 flow [2024-06-14 13:52:21,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 253 transitions, 3768 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:21,504 INFO L231 Difference]: Finished difference. Result has 161 places, 224 transitions, 3098 flow [2024-06-14 13:52:21,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2755, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3098, PETRI_PLACES=161, PETRI_TRANSITIONS=224} [2024-06-14 13:52:21,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-14 13:52:21,505 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 224 transitions, 3098 flow [2024-06-14 13:52:21,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:21,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:21,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:21,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:52:21,506 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:21,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:21,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1098302093, now seen corresponding path program 2 times [2024-06-14 13:52:21,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:21,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887265929] [2024-06-14 13:52:21,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:21,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:21,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:21,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887265929] [2024-06-14 13:52:21,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887265929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:21,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:21,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:21,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377854342] [2024-06-14 13:52:21,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:21,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:21,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:21,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:21,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:21,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:21,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 224 transitions, 3098 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:21,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:21,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:21,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:22,556 INFO L124 PetriNetUnfolderBase]: 3437/5924 cut-off events. [2024-06-14 13:52:22,557 INFO L125 PetriNetUnfolderBase]: For 181141/181143 co-relation queries the response was YES. [2024-06-14 13:52:22,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37255 conditions, 5924 events. 3437/5924 cut-off events. For 181141/181143 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 41219 event pairs, 1230 based on Foata normal form. 3/5925 useless extension candidates. Maximal degree in co-relation 37176. Up to 5279 conditions per place. [2024-06-14 13:52:22,605 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 58 changer transitions 0/249 dead transitions. [2024-06-14 13:52:22,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 249 transitions, 3845 flow [2024-06-14 13:52:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:22,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 13:52:22,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 13:52:22,606 INFO L175 Difference]: Start difference. First operand has 161 places, 224 transitions, 3098 flow. Second operand 9 states and 195 transitions. [2024-06-14 13:52:22,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 249 transitions, 3845 flow [2024-06-14 13:52:22,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 249 transitions, 3676 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:22,936 INFO L231 Difference]: Finished difference. Result has 166 places, 224 transitions, 3051 flow [2024-06-14 13:52:22,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3051, PETRI_PLACES=166, PETRI_TRANSITIONS=224} [2024-06-14 13:52:22,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-14 13:52:22,937 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 224 transitions, 3051 flow [2024-06-14 13:52:22,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:22,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:22,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:22,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:52:22,938 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:22,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:22,938 INFO L85 PathProgramCache]: Analyzing trace with hash 383549669, now seen corresponding path program 1 times [2024-06-14 13:52:22,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:22,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213641740] [2024-06-14 13:52:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:22,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:23,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:23,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213641740] [2024-06-14 13:52:23,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213641740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:23,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:23,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:23,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351864497] [2024-06-14 13:52:23,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:23,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:23,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:23,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:23,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:23,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:23,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 224 transitions, 3051 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:23,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:23,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:23,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:23,881 INFO L124 PetriNetUnfolderBase]: 3447/5940 cut-off events. [2024-06-14 13:52:23,882 INFO L125 PetriNetUnfolderBase]: For 187987/187989 co-relation queries the response was YES. [2024-06-14 13:52:23,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37298 conditions, 5940 events. 3447/5940 cut-off events. For 187987/187989 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 41281 event pairs, 1234 based on Foata normal form. 4/5942 useless extension candidates. Maximal degree in co-relation 37217. Up to 5317 conditions per place. [2024-06-14 13:52:23,937 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 199 selfloop transitions, 49 changer transitions 0/254 dead transitions. [2024-06-14 13:52:23,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 254 transitions, 3902 flow [2024-06-14 13:52:23,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 13:52:23,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 13:52:23,938 INFO L175 Difference]: Start difference. First operand has 166 places, 224 transitions, 3051 flow. Second operand 8 states and 178 transitions. [2024-06-14 13:52:23,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 254 transitions, 3902 flow [2024-06-14 13:52:24,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 254 transitions, 3758 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:24,342 INFO L231 Difference]: Finished difference. Result has 166 places, 230 transitions, 3107 flow [2024-06-14 13:52:24,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3107, PETRI_PLACES=166, PETRI_TRANSITIONS=230} [2024-06-14 13:52:24,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-14 13:52:24,342 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 230 transitions, 3107 flow [2024-06-14 13:52:24,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:24,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:24,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:24,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:52:24,343 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:24,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:24,343 INFO L85 PathProgramCache]: Analyzing trace with hash 611450819, now seen corresponding path program 2 times [2024-06-14 13:52:24,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:24,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966181394] [2024-06-14 13:52:24,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:24,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:24,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:24,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966181394] [2024-06-14 13:52:24,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966181394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:24,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:24,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:24,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219699636] [2024-06-14 13:52:24,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:24,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:24,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:24,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:24,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:24,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:24,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 230 transitions, 3107 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:24,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:24,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:24,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:25,295 INFO L124 PetriNetUnfolderBase]: 3452/5945 cut-off events. [2024-06-14 13:52:25,295 INFO L125 PetriNetUnfolderBase]: For 196970/196990 co-relation queries the response was YES. [2024-06-14 13:52:25,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37578 conditions, 5945 events. 3452/5945 cut-off events. For 196970/196990 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 41322 event pairs, 1252 based on Foata normal form. 15/5955 useless extension candidates. Maximal degree in co-relation 37496. Up to 5321 conditions per place. [2024-06-14 13:52:25,351 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 197 selfloop transitions, 51 changer transitions 0/254 dead transitions. [2024-06-14 13:52:25,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 254 transitions, 3981 flow [2024-06-14 13:52:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:25,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 13:52:25,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-14 13:52:25,352 INFO L175 Difference]: Start difference. First operand has 166 places, 230 transitions, 3107 flow. Second operand 7 states and 158 transitions. [2024-06-14 13:52:25,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 254 transitions, 3981 flow [2024-06-14 13:52:25,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 254 transitions, 3914 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:25,891 INFO L231 Difference]: Finished difference. Result has 169 places, 233 transitions, 3195 flow [2024-06-14 13:52:25,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3042, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3195, PETRI_PLACES=169, PETRI_TRANSITIONS=233} [2024-06-14 13:52:25,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-14 13:52:25,892 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 233 transitions, 3195 flow [2024-06-14 13:52:25,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:25,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:25,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:25,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:52:25,893 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:25,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:25,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1724239015, now seen corresponding path program 3 times [2024-06-14 13:52:25,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:25,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399781795] [2024-06-14 13:52:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:25,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:26,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:26,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399781795] [2024-06-14 13:52:26,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399781795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:26,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:26,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:26,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271259629] [2024-06-14 13:52:26,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:26,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:26,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:26,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:26,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:26,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:26,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 233 transitions, 3195 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:26,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:26,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:26,856 INFO L124 PetriNetUnfolderBase]: 3449/5945 cut-off events. [2024-06-14 13:52:26,856 INFO L125 PetriNetUnfolderBase]: For 205803/205823 co-relation queries the response was YES. [2024-06-14 13:52:26,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37803 conditions, 5945 events. 3449/5945 cut-off events. For 205803/205823 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 41372 event pairs, 1257 based on Foata normal form. 15/5955 useless extension candidates. Maximal degree in co-relation 37720. Up to 5319 conditions per place. [2024-06-14 13:52:26,916 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 194 selfloop transitions, 53 changer transitions 0/253 dead transitions. [2024-06-14 13:52:26,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 253 transitions, 3950 flow [2024-06-14 13:52:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 13:52:26,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 13:52:26,925 INFO L175 Difference]: Start difference. First operand has 169 places, 233 transitions, 3195 flow. Second operand 7 states and 157 transitions. [2024-06-14 13:52:26,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 253 transitions, 3950 flow [2024-06-14 13:52:27,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 253 transitions, 3789 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:27,406 INFO L231 Difference]: Finished difference. Result has 170 places, 233 transitions, 3146 flow [2024-06-14 13:52:27,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3034, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3146, PETRI_PLACES=170, PETRI_TRANSITIONS=233} [2024-06-14 13:52:27,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-14 13:52:27,407 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 233 transitions, 3146 flow [2024-06-14 13:52:27,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:27,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:27,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:27,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:52:27,407 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:27,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:27,408 INFO L85 PathProgramCache]: Analyzing trace with hash 605745827, now seen corresponding path program 1 times [2024-06-14 13:52:27,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:27,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172375230] [2024-06-14 13:52:27,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:27,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:27,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172375230] [2024-06-14 13:52:27,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172375230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:27,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:27,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:27,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089621623] [2024-06-14 13:52:27,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:27,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:27,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:27,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:27,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:27,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:27,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 233 transitions, 3146 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:27,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:27,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:27,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:28,416 INFO L124 PetriNetUnfolderBase]: 3345/5805 cut-off events. [2024-06-14 13:52:28,416 INFO L125 PetriNetUnfolderBase]: For 219844/219844 co-relation queries the response was YES. [2024-06-14 13:52:28,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37260 conditions, 5805 events. 3345/5805 cut-off events. For 219844/219844 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 40774 event pairs, 1224 based on Foata normal form. 10/5782 useless extension candidates. Maximal degree in co-relation 37176. Up to 5113 conditions per place. [2024-06-14 13:52:28,476 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 192 selfloop transitions, 18 changer transitions 0/248 dead transitions. [2024-06-14 13:52:28,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 248 transitions, 3632 flow [2024-06-14 13:52:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 13:52:28,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:52:28,478 INFO L175 Difference]: Start difference. First operand has 170 places, 233 transitions, 3146 flow. Second operand 6 states and 135 transitions. [2024-06-14 13:52:28,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 248 transitions, 3632 flow [2024-06-14 13:52:29,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 248 transitions, 3526 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:29,027 INFO L231 Difference]: Finished difference. Result has 171 places, 234 transitions, 3098 flow [2024-06-14 13:52:29,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3098, PETRI_PLACES=171, PETRI_TRANSITIONS=234} [2024-06-14 13:52:29,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-14 13:52:29,028 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 234 transitions, 3098 flow [2024-06-14 13:52:29,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:29,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:29,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:29,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:52:29,029 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:29,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:29,029 INFO L85 PathProgramCache]: Analyzing trace with hash 620030627, now seen corresponding path program 2 times [2024-06-14 13:52:29,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:29,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410781224] [2024-06-14 13:52:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:29,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:29,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:29,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410781224] [2024-06-14 13:52:29,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410781224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:29,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:29,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:29,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889040389] [2024-06-14 13:52:29,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:29,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:29,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:29,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:29,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:29,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:29,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 234 transitions, 3098 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:29,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:29,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:29,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:30,003 INFO L124 PetriNetUnfolderBase]: 3338/5795 cut-off events. [2024-06-14 13:52:30,003 INFO L125 PetriNetUnfolderBase]: For 224962/224962 co-relation queries the response was YES. [2024-06-14 13:52:30,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37232 conditions, 5795 events. 3338/5795 cut-off events. For 224962/224962 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 40759 event pairs, 1182 based on Foata normal form. 8/5771 useless extension candidates. Maximal degree in co-relation 37147. Up to 5034 conditions per place. [2024-06-14 13:52:30,071 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 193 selfloop transitions, 21 changer transitions 0/252 dead transitions. [2024-06-14 13:52:30,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 252 transitions, 3610 flow [2024-06-14 13:52:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:30,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 13:52:30,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 13:52:30,073 INFO L175 Difference]: Start difference. First operand has 171 places, 234 transitions, 3098 flow. Second operand 6 states and 137 transitions. [2024-06-14 13:52:30,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 252 transitions, 3610 flow [2024-06-14 13:52:30,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 252 transitions, 3568 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:30,582 INFO L231 Difference]: Finished difference. Result has 173 places, 235 transitions, 3120 flow [2024-06-14 13:52:30,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3056, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3120, PETRI_PLACES=173, PETRI_TRANSITIONS=235} [2024-06-14 13:52:30,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-14 13:52:30,583 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 235 transitions, 3120 flow [2024-06-14 13:52:30,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:30,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:30,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:52:30,583 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:30,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:30,584 INFO L85 PathProgramCache]: Analyzing trace with hash 144763211, now seen corresponding path program 1 times [2024-06-14 13:52:30,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:30,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845877265] [2024-06-14 13:52:30,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:30,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:30,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:30,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845877265] [2024-06-14 13:52:30,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845877265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:30,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:30,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:30,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435659477] [2024-06-14 13:52:30,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:30,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:30,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:30,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:30,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:30,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:30,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 235 transitions, 3120 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:30,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:30,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:31,689 INFO L124 PetriNetUnfolderBase]: 3516/6051 cut-off events. [2024-06-14 13:52:31,689 INFO L125 PetriNetUnfolderBase]: For 238368/238370 co-relation queries the response was YES. [2024-06-14 13:52:31,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39197 conditions, 6051 events. 3516/6051 cut-off events. For 238368/238370 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 42118 event pairs, 1161 based on Foata normal form. 6/6055 useless extension candidates. Maximal degree in co-relation 39111. Up to 5339 conditions per place. [2024-06-14 13:52:31,748 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 210 selfloop transitions, 54 changer transitions 0/270 dead transitions. [2024-06-14 13:52:31,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 270 transitions, 4035 flow [2024-06-14 13:52:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 13:52:31,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-14 13:52:31,750 INFO L175 Difference]: Start difference. First operand has 173 places, 235 transitions, 3120 flow. Second operand 9 states and 197 transitions. [2024-06-14 13:52:31,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 270 transitions, 4035 flow [2024-06-14 13:52:32,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 270 transitions, 3983 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:32,235 INFO L231 Difference]: Finished difference. Result has 179 places, 241 transitions, 3377 flow [2024-06-14 13:52:32,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3068, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3377, PETRI_PLACES=179, PETRI_TRANSITIONS=241} [2024-06-14 13:52:32,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-14 13:52:32,236 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 241 transitions, 3377 flow [2024-06-14 13:52:32,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:32,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:32,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:32,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:52:32,237 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:32,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:32,237 INFO L85 PathProgramCache]: Analyzing trace with hash 830430257, now seen corresponding path program 2 times [2024-06-14 13:52:32,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:32,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389805626] [2024-06-14 13:52:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:32,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:32,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:32,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389805626] [2024-06-14 13:52:32,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389805626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:32,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:32,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:32,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241469458] [2024-06-14 13:52:32,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:32,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:32,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:32,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:32,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:32,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:32,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 241 transitions, 3377 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:32,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:32,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:32,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:33,261 INFO L124 PetriNetUnfolderBase]: 3506/6037 cut-off events. [2024-06-14 13:52:33,261 INFO L125 PetriNetUnfolderBase]: For 246926/246928 co-relation queries the response was YES. [2024-06-14 13:52:33,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39466 conditions, 6037 events. 3506/6037 cut-off events. For 246926/246928 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 42093 event pairs, 1248 based on Foata normal form. 6/6041 useless extension candidates. Maximal degree in co-relation 39378. Up to 5429 conditions per place. [2024-06-14 13:52:33,317 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 214 selfloop transitions, 45 changer transitions 0/265 dead transitions. [2024-06-14 13:52:33,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 265 transitions, 4022 flow [2024-06-14 13:52:33,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:33,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 13:52:33,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 13:52:33,319 INFO L175 Difference]: Start difference. First operand has 179 places, 241 transitions, 3377 flow. Second operand 9 states and 192 transitions. [2024-06-14 13:52:33,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 265 transitions, 4022 flow [2024-06-14 13:52:33,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 265 transitions, 3829 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:33,938 INFO L231 Difference]: Finished difference. Result has 183 places, 241 transitions, 3280 flow [2024-06-14 13:52:33,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3184, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3280, PETRI_PLACES=183, PETRI_TRANSITIONS=241} [2024-06-14 13:52:33,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-14 13:52:33,939 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 241 transitions, 3280 flow [2024-06-14 13:52:33,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:33,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:33,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:33,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:52:33,940 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:33,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:33,940 INFO L85 PathProgramCache]: Analyzing trace with hash 383564549, now seen corresponding path program 1 times [2024-06-14 13:52:33,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:33,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739613019] [2024-06-14 13:52:33,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:33,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:34,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:34,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739613019] [2024-06-14 13:52:34,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739613019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:34,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:34,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:34,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046379997] [2024-06-14 13:52:34,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:34,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:34,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:34,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:34,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:34,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:34,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 241 transitions, 3280 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:34,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:34,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:34,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:34,985 INFO L124 PetriNetUnfolderBase]: 3611/6200 cut-off events. [2024-06-14 13:52:34,985 INFO L125 PetriNetUnfolderBase]: For 283721/283723 co-relation queries the response was YES. [2024-06-14 13:52:35,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40138 conditions, 6200 events. 3611/6200 cut-off events. For 283721/283723 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 43259 event pairs, 1257 based on Foata normal form. 42/6240 useless extension candidates. Maximal degree in co-relation 40048. Up to 5470 conditions per place. [2024-06-14 13:52:35,048 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 227 selfloop transitions, 40 changer transitions 0/273 dead transitions. [2024-06-14 13:52:35,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 273 transitions, 4065 flow [2024-06-14 13:52:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:35,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 13:52:35,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 13:52:35,049 INFO L175 Difference]: Start difference. First operand has 183 places, 241 transitions, 3280 flow. Second operand 8 states and 178 transitions. [2024-06-14 13:52:35,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 273 transitions, 4065 flow [2024-06-14 13:52:35,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 273 transitions, 3949 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:35,636 INFO L231 Difference]: Finished difference. Result has 183 places, 247 transitions, 3370 flow [2024-06-14 13:52:35,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3164, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3370, PETRI_PLACES=183, PETRI_TRANSITIONS=247} [2024-06-14 13:52:35,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-14 13:52:35,637 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 247 transitions, 3370 flow [2024-06-14 13:52:35,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:35,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:35,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:35,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:52:35,638 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:35,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:35,638 INFO L85 PathProgramCache]: Analyzing trace with hash 611465699, now seen corresponding path program 2 times [2024-06-14 13:52:35,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:35,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95939396] [2024-06-14 13:52:35,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:35,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:35,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:35,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95939396] [2024-06-14 13:52:35,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95939396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:35,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:35,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:35,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117385644] [2024-06-14 13:52:35,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:35,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:35,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:35,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:35,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:35,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:35,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 247 transitions, 3370 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:35,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:35,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:35,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:36,699 INFO L124 PetriNetUnfolderBase]: 3587/6163 cut-off events. [2024-06-14 13:52:36,699 INFO L125 PetriNetUnfolderBase]: For 260222/260242 co-relation queries the response was YES. [2024-06-14 13:52:36,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40275 conditions, 6163 events. 3587/6163 cut-off events. For 260222/260242 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 43035 event pairs, 1269 based on Foata normal form. 18/6176 useless extension candidates. Maximal degree in co-relation 40184. Up to 5570 conditions per place. [2024-06-14 13:52:36,759 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 227 selfloop transitions, 36 changer transitions 0/269 dead transitions. [2024-06-14 13:52:36,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 269 transitions, 4061 flow [2024-06-14 13:52:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-14 13:52:36,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-14 13:52:36,761 INFO L175 Difference]: Start difference. First operand has 183 places, 247 transitions, 3370 flow. Second operand 7 states and 153 transitions. [2024-06-14 13:52:36,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 269 transitions, 4061 flow [2024-06-14 13:52:37,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 269 transitions, 3931 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:37,491 INFO L231 Difference]: Finished difference. Result has 184 places, 250 transitions, 3372 flow [2024-06-14 13:52:37,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3240, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3372, PETRI_PLACES=184, PETRI_TRANSITIONS=250} [2024-06-14 13:52:37,492 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-14 13:52:37,492 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 250 transitions, 3372 flow [2024-06-14 13:52:37,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:37,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:37,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:37,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:52:37,493 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:37,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:37,493 INFO L85 PathProgramCache]: Analyzing trace with hash 620036579, now seen corresponding path program 3 times [2024-06-14 13:52:37,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:37,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478452321] [2024-06-14 13:52:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:37,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:37,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:37,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478452321] [2024-06-14 13:52:37,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478452321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:37,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:37,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:37,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799255835] [2024-06-14 13:52:37,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:37,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:37,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:37,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:37,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:37,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:37,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 250 transitions, 3372 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:37,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:37,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:37,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:38,536 INFO L124 PetriNetUnfolderBase]: 3563/6119 cut-off events. [2024-06-14 13:52:38,536 INFO L125 PetriNetUnfolderBase]: For 264670/264690 co-relation queries the response was YES. [2024-06-14 13:52:38,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39732 conditions, 6119 events. 3563/6119 cut-off events. For 264670/264690 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 42615 event pairs, 1219 based on Foata normal form. 18/6132 useless extension candidates. Maximal degree in co-relation 39640. Up to 5350 conditions per place. [2024-06-14 13:52:38,600 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 222 selfloop transitions, 47 changer transitions 0/275 dead transitions. [2024-06-14 13:52:38,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 275 transitions, 4077 flow [2024-06-14 13:52:38,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 13:52:38,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-14 13:52:38,601 INFO L175 Difference]: Start difference. First operand has 184 places, 250 transitions, 3372 flow. Second operand 7 states and 158 transitions. [2024-06-14 13:52:38,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 275 transitions, 4077 flow [2024-06-14 13:52:39,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 275 transitions, 3983 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:39,286 INFO L231 Difference]: Finished difference. Result has 187 places, 252 transitions, 3424 flow [2024-06-14 13:52:39,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3424, PETRI_PLACES=187, PETRI_TRANSITIONS=252} [2024-06-14 13:52:39,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-14 13:52:39,287 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 252 transitions, 3424 flow [2024-06-14 13:52:39,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:39,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:39,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:39,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:52:39,288 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:39,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:39,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1007003663, now seen corresponding path program 1 times [2024-06-14 13:52:39,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:39,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922630013] [2024-06-14 13:52:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:39,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:39,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:39,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922630013] [2024-06-14 13:52:39,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922630013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:39,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:39,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:39,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986686048] [2024-06-14 13:52:39,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:39,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:39,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:39,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:39,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:39,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:39,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 252 transitions, 3424 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:39,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:39,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:39,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:40,383 INFO L124 PetriNetUnfolderBase]: 3550/6092 cut-off events. [2024-06-14 13:52:40,383 INFO L125 PetriNetUnfolderBase]: For 271083/271083 co-relation queries the response was YES. [2024-06-14 13:52:40,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39856 conditions, 6092 events. 3550/6092 cut-off events. For 271083/271083 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 42179 event pairs, 1057 based on Foata normal form. 6/6094 useless extension candidates. Maximal degree in co-relation 39762. Up to 5484 conditions per place. [2024-06-14 13:52:40,442 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 247 selfloop transitions, 20 changer transitions 0/273 dead transitions. [2024-06-14 13:52:40,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 273 transitions, 4039 flow [2024-06-14 13:52:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:40,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 13:52:40,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 13:52:40,443 INFO L175 Difference]: Start difference. First operand has 187 places, 252 transitions, 3424 flow. Second operand 6 states and 140 transitions. [2024-06-14 13:52:40,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 273 transitions, 4039 flow [2024-06-14 13:52:41,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 273 transitions, 3939 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:41,137 INFO L231 Difference]: Finished difference. Result has 190 places, 253 transitions, 3386 flow [2024-06-14 13:52:41,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3324, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3386, PETRI_PLACES=190, PETRI_TRANSITIONS=253} [2024-06-14 13:52:41,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-14 13:52:41,138 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 253 transitions, 3386 flow [2024-06-14 13:52:41,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:41,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:41,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:41,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:52:41,139 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:41,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:41,139 INFO L85 PathProgramCache]: Analyzing trace with hash 351404677, now seen corresponding path program 2 times [2024-06-14 13:52:41,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:41,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100235504] [2024-06-14 13:52:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:41,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:41,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:41,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100235504] [2024-06-14 13:52:41,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100235504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:41,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:41,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:41,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155818209] [2024-06-14 13:52:41,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:41,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:41,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:41,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:41,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:41,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:41,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 253 transitions, 3386 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:41,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:41,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:41,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:42,251 INFO L124 PetriNetUnfolderBase]: 3537/6073 cut-off events. [2024-06-14 13:52:42,252 INFO L125 PetriNetUnfolderBase]: For 274852/274852 co-relation queries the response was YES. [2024-06-14 13:52:42,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39568 conditions, 6073 events. 3537/6073 cut-off events. For 274852/274852 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 42037 event pairs, 1089 based on Foata normal form. 6/6075 useless extension candidates. Maximal degree in co-relation 39472. Up to 5536 conditions per place. [2024-06-14 13:52:42,315 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 253 selfloop transitions, 12 changer transitions 0/271 dead transitions. [2024-06-14 13:52:42,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 271 transitions, 3968 flow [2024-06-14 13:52:42,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-14 13:52:42,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-14 13:52:42,316 INFO L175 Difference]: Start difference. First operand has 190 places, 253 transitions, 3386 flow. Second operand 6 states and 133 transitions. [2024-06-14 13:52:42,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 271 transitions, 3968 flow [2024-06-14 13:52:43,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 271 transitions, 3917 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:43,106 INFO L231 Difference]: Finished difference. Result has 193 places, 253 transitions, 3363 flow [2024-06-14 13:52:43,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3363, PETRI_PLACES=193, PETRI_TRANSITIONS=253} [2024-06-14 13:52:43,107 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-14 13:52:43,107 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 253 transitions, 3363 flow [2024-06-14 13:52:43,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:43,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:43,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:43,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:52:43,107 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:43,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:43,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1310873437, now seen corresponding path program 1 times [2024-06-14 13:52:43,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:43,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104309752] [2024-06-14 13:52:43,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:43,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:43,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:43,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104309752] [2024-06-14 13:52:43,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104309752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:43,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:43,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:43,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002139019] [2024-06-14 13:52:43,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:43,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:43,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:43,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:43,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:43,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:43,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 253 transitions, 3363 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:43,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:43,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:43,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:44,183 INFO L124 PetriNetUnfolderBase]: 3555/6105 cut-off events. [2024-06-14 13:52:44,183 INFO L125 PetriNetUnfolderBase]: For 280838/280838 co-relation queries the response was YES. [2024-06-14 13:52:44,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39924 conditions, 6105 events. 3555/6105 cut-off events. For 280838/280838 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 42449 event pairs, 1231 based on Foata normal form. 4/6105 useless extension candidates. Maximal degree in co-relation 39827. Up to 5449 conditions per place. [2024-06-14 13:52:44,245 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 216 selfloop transitions, 62 changer transitions 1/285 dead transitions. [2024-06-14 13:52:44,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 285 transitions, 4362 flow [2024-06-14 13:52:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:52:44,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 13:52:44,247 INFO L175 Difference]: Start difference. First operand has 193 places, 253 transitions, 3363 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:52:44,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 285 transitions, 4362 flow [2024-06-14 13:52:45,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 285 transitions, 4279 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:45,069 INFO L231 Difference]: Finished difference. Result has 196 places, 263 transitions, 3680 flow [2024-06-14 13:52:45,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3287, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3680, PETRI_PLACES=196, PETRI_TRANSITIONS=263} [2024-06-14 13:52:45,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-14 13:52:45,069 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 263 transitions, 3680 flow [2024-06-14 13:52:45,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:45,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:45,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:45,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:52:45,070 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:45,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:45,070 INFO L85 PathProgramCache]: Analyzing trace with hash 932157303, now seen corresponding path program 1 times [2024-06-14 13:52:45,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:45,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870522989] [2024-06-14 13:52:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:45,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:45,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:45,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870522989] [2024-06-14 13:52:45,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870522989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:45,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:45,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:52:45,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281599017] [2024-06-14 13:52:45,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:45,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:52:45,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:45,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:52:45,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:52:45,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:45,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 263 transitions, 3680 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:45,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:45,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:45,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:46,197 INFO L124 PetriNetUnfolderBase]: 3594/6171 cut-off events. [2024-06-14 13:52:46,198 INFO L125 PetriNetUnfolderBase]: For 291745/291745 co-relation queries the response was YES. [2024-06-14 13:52:46,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41037 conditions, 6171 events. 3594/6171 cut-off events. For 291745/291745 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 42999 event pairs, 1200 based on Foata normal form. 1/6168 useless extension candidates. Maximal degree in co-relation 40939. Up to 5512 conditions per place. [2024-06-14 13:52:46,260 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 222 selfloop transitions, 78 changer transitions 0/306 dead transitions. [2024-06-14 13:52:46,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 306 transitions, 4964 flow [2024-06-14 13:52:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 13:52:46,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:52:46,261 INFO L175 Difference]: Start difference. First operand has 196 places, 263 transitions, 3680 flow. Second operand 8 states and 184 transitions. [2024-06-14 13:52:46,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 306 transitions, 4964 flow [2024-06-14 13:52:47,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 306 transitions, 4883 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:47,221 INFO L231 Difference]: Finished difference. Result has 203 places, 286 transitions, 4332 flow [2024-06-14 13:52:47,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3615, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4332, PETRI_PLACES=203, PETRI_TRANSITIONS=286} [2024-06-14 13:52:47,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-14 13:52:47,221 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 286 transitions, 4332 flow [2024-06-14 13:52:47,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:47,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:47,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:47,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:52:47,222 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:47,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:47,222 INFO L85 PathProgramCache]: Analyzing trace with hash 440062507, now seen corresponding path program 2 times [2024-06-14 13:52:47,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:47,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025630058] [2024-06-14 13:52:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:47,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:47,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:47,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025630058] [2024-06-14 13:52:47,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025630058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:47,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:47,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:47,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478548039] [2024-06-14 13:52:47,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:47,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:47,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:47,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:47,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:47,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:47,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 286 transitions, 4332 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:47,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:47,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:47,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:48,363 INFO L124 PetriNetUnfolderBase]: 3604/6191 cut-off events. [2024-06-14 13:52:48,363 INFO L125 PetriNetUnfolderBase]: For 296276/296276 co-relation queries the response was YES. [2024-06-14 13:52:48,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42839 conditions, 6191 events. 3604/6191 cut-off events. For 296276/296276 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 43079 event pairs, 1231 based on Foata normal form. 2/6189 useless extension candidates. Maximal degree in co-relation 42738. Up to 5600 conditions per place. [2024-06-14 13:52:48,427 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 258 selfloop transitions, 48 changer transitions 0/312 dead transitions. [2024-06-14 13:52:48,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 312 transitions, 5300 flow [2024-06-14 13:52:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:48,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:48,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 13:52:48,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-14 13:52:48,428 INFO L175 Difference]: Start difference. First operand has 203 places, 286 transitions, 4332 flow. Second operand 7 states and 159 transitions. [2024-06-14 13:52:48,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 312 transitions, 5300 flow [2024-06-14 13:52:49,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 312 transitions, 5066 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:49,411 INFO L231 Difference]: Finished difference. Result has 206 places, 298 transitions, 4577 flow [2024-06-14 13:52:49,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4111, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4577, PETRI_PLACES=206, PETRI_TRANSITIONS=298} [2024-06-14 13:52:49,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-14 13:52:49,411 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 298 transitions, 4577 flow [2024-06-14 13:52:49,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:49,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:49,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:49,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:52:49,412 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:49,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:49,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1324935967, now seen corresponding path program 2 times [2024-06-14 13:52:49,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:49,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223752052] [2024-06-14 13:52:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:49,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:49,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:49,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223752052] [2024-06-14 13:52:49,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223752052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:49,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:49,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:49,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960332805] [2024-06-14 13:52:49,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:49,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:49,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:49,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:49,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:49,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:49,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 298 transitions, 4577 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:49,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:49,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:49,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:50,572 INFO L124 PetriNetUnfolderBase]: 3599/6183 cut-off events. [2024-06-14 13:52:50,573 INFO L125 PetriNetUnfolderBase]: For 303769/303769 co-relation queries the response was YES. [2024-06-14 13:52:50,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43010 conditions, 6183 events. 3599/6183 cut-off events. For 303769/303769 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 43055 event pairs, 1231 based on Foata normal form. 1/6180 useless extension candidates. Maximal degree in co-relation 42906. Up to 5500 conditions per place. [2024-06-14 13:52:50,643 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 81 changer transitions 2/315 dead transitions. [2024-06-14 13:52:50,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 315 transitions, 5237 flow [2024-06-14 13:52:50,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:52:50,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:52:50,645 INFO L175 Difference]: Start difference. First operand has 206 places, 298 transitions, 4577 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:52:50,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 315 transitions, 5237 flow [2024-06-14 13:52:51,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 315 transitions, 5082 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:51,748 INFO L231 Difference]: Finished difference. Result has 210 places, 296 transitions, 4543 flow [2024-06-14 13:52:51,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4422, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4543, PETRI_PLACES=210, PETRI_TRANSITIONS=296} [2024-06-14 13:52:51,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-14 13:52:51,749 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 296 transitions, 4543 flow [2024-06-14 13:52:51,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:51,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:51,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:51,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:52:51,750 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:51,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:51,750 INFO L85 PathProgramCache]: Analyzing trace with hash 254286577, now seen corresponding path program 3 times [2024-06-14 13:52:51,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:51,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209036993] [2024-06-14 13:52:51,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:51,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:51,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:51,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209036993] [2024-06-14 13:52:51,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209036993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:51,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:51,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:51,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427261101] [2024-06-14 13:52:51,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:51,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:51,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:51,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:51,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:52,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:52,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 296 transitions, 4543 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:52,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:52,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:52,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:52,882 INFO L124 PetriNetUnfolderBase]: 3621/6216 cut-off events. [2024-06-14 13:52:52,882 INFO L125 PetriNetUnfolderBase]: For 319844/319844 co-relation queries the response was YES. [2024-06-14 13:52:52,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43638 conditions, 6216 events. 3621/6216 cut-off events. For 319844/319844 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 43307 event pairs, 1225 based on Foata normal form. 1/6213 useless extension candidates. Maximal degree in co-relation 43534. Up to 5379 conditions per place. [2024-06-14 13:52:52,949 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 205 selfloop transitions, 122 changer transitions 0/333 dead transitions. [2024-06-14 13:52:52,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 333 transitions, 5849 flow [2024-06-14 13:52:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-14 13:52:52,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 13:52:52,952 INFO L175 Difference]: Start difference. First operand has 210 places, 296 transitions, 4543 flow. Second operand 9 states and 204 transitions. [2024-06-14 13:52:52,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 333 transitions, 5849 flow [2024-06-14 13:52:53,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 333 transitions, 5640 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:53,821 INFO L231 Difference]: Finished difference. Result has 213 places, 308 transitions, 4953 flow [2024-06-14 13:52:53,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4340, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4953, PETRI_PLACES=213, PETRI_TRANSITIONS=308} [2024-06-14 13:52:53,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-14 13:52:53,822 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 308 transitions, 4953 flow [2024-06-14 13:52:53,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:53,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:53,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:53,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:52:53,822 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:53,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:53,823 INFO L85 PathProgramCache]: Analyzing trace with hash 254585107, now seen corresponding path program 4 times [2024-06-14 13:52:53,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:53,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693385120] [2024-06-14 13:52:53,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:53,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:54,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:54,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693385120] [2024-06-14 13:52:54,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693385120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:54,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:54,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:54,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232893209] [2024-06-14 13:52:54,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:54,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:54,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:54,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:54,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:54,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:54,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 308 transitions, 4953 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:54,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:54,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:54,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:54,991 INFO L124 PetriNetUnfolderBase]: 3618/6212 cut-off events. [2024-06-14 13:52:54,992 INFO L125 PetriNetUnfolderBase]: For 325297/325297 co-relation queries the response was YES. [2024-06-14 13:52:55,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44857 conditions, 6212 events. 3618/6212 cut-off events. For 325297/325297 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 43297 event pairs, 1225 based on Foata normal form. 1/6209 useless extension candidates. Maximal degree in co-relation 44752. Up to 5377 conditions per place. [2024-06-14 13:52:55,068 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 201 selfloop transitions, 122 changer transitions 0/329 dead transitions. [2024-06-14 13:52:55,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 329 transitions, 5849 flow [2024-06-14 13:52:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 13:52:55,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-14 13:52:55,070 INFO L175 Difference]: Start difference. First operand has 213 places, 308 transitions, 4953 flow. Second operand 9 states and 201 transitions. [2024-06-14 13:52:55,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 329 transitions, 5849 flow [2024-06-14 13:52:56,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 329 transitions, 5661 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:56,200 INFO L231 Difference]: Finished difference. Result has 219 places, 308 transitions, 5016 flow [2024-06-14 13:52:56,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5016, PETRI_PLACES=219, PETRI_TRANSITIONS=308} [2024-06-14 13:52:56,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-14 13:52:56,201 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 308 transitions, 5016 flow [2024-06-14 13:52:56,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:56,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:56,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:56,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:52:56,202 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:56,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:56,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1003192337, now seen corresponding path program 3 times [2024-06-14 13:52:56,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:56,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048617330] [2024-06-14 13:52:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:56,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:56,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:56,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048617330] [2024-06-14 13:52:56,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048617330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:56,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:56,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:56,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956356495] [2024-06-14 13:52:56,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:56,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:56,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:56,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:56,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:56,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:56,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 308 transitions, 5016 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:56,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:56,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:56,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:57,366 INFO L124 PetriNetUnfolderBase]: 3628/6230 cut-off events. [2024-06-14 13:52:57,366 INFO L125 PetriNetUnfolderBase]: For 333241/333241 co-relation queries the response was YES. [2024-06-14 13:52:57,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44462 conditions, 6230 events. 3628/6230 cut-off events. For 333241/333241 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 43466 event pairs, 1229 based on Foata normal form. 2/6228 useless extension candidates. Maximal degree in co-relation 44355. Up to 5437 conditions per place. [2024-06-14 13:52:57,432 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 233 selfloop transitions, 99 changer transitions 1/339 dead transitions. [2024-06-14 13:52:57,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 339 transitions, 6029 flow [2024-06-14 13:52:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-14 13:52:57,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-14 13:52:57,434 INFO L175 Difference]: Start difference. First operand has 219 places, 308 transitions, 5016 flow. Second operand 9 states and 208 transitions. [2024-06-14 13:52:57,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 339 transitions, 6029 flow [2024-06-14 13:52:58,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 339 transitions, 5764 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:58,432 INFO L231 Difference]: Finished difference. Result has 221 places, 311 transitions, 5018 flow [2024-06-14 13:52:58,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4759, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5018, PETRI_PLACES=221, PETRI_TRANSITIONS=311} [2024-06-14 13:52:58,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-14 13:52:58,433 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 311 transitions, 5018 flow [2024-06-14 13:52:58,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:58,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:58,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:58,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:52:58,434 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:58,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:58,434 INFO L85 PathProgramCache]: Analyzing trace with hash -2124716341, now seen corresponding path program 5 times [2024-06-14 13:52:58,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:58,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545663445] [2024-06-14 13:52:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:58,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:58,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:58,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545663445] [2024-06-14 13:52:58,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545663445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:58,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:58,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:58,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591814977] [2024-06-14 13:52:58,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:58,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:58,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:58,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:58,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:58,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:58,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 311 transitions, 5018 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:58,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:58,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:58,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:59,688 INFO L124 PetriNetUnfolderBase]: 3623/6224 cut-off events. [2024-06-14 13:52:59,689 INFO L125 PetriNetUnfolderBase]: For 341742/341742 co-relation queries the response was YES. [2024-06-14 13:52:59,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44498 conditions, 6224 events. 3623/6224 cut-off events. For 341742/341742 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 43454 event pairs, 1227 based on Foata normal form. 1/6221 useless extension candidates. Maximal degree in co-relation 44390. Up to 5385 conditions per place. [2024-06-14 13:52:59,753 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 214 selfloop transitions, 122 changer transitions 0/342 dead transitions. [2024-06-14 13:52:59,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 342 transitions, 5974 flow [2024-06-14 13:52:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:52:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:52:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-14 13:52:59,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585365853658537 [2024-06-14 13:52:59,755 INFO L175 Difference]: Start difference. First operand has 221 places, 311 transitions, 5018 flow. Second operand 10 states and 229 transitions. [2024-06-14 13:52:59,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 342 transitions, 5974 flow [2024-06-14 13:53:00,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 342 transitions, 5813 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:00,938 INFO L231 Difference]: Finished difference. Result has 226 places, 311 transitions, 5107 flow [2024-06-14 13:53:00,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4857, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5107, PETRI_PLACES=226, PETRI_TRANSITIONS=311} [2024-06-14 13:53:00,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-14 13:53:00,939 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 311 transitions, 5107 flow [2024-06-14 13:53:00,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:00,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:00,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:00,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:53:00,940 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:00,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:00,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1003181177, now seen corresponding path program 4 times [2024-06-14 13:53:00,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:00,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080491417] [2024-06-14 13:53:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:00,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:01,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:01,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080491417] [2024-06-14 13:53:01,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080491417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:01,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:01,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:01,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978213813] [2024-06-14 13:53:01,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:01,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:01,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:01,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:01,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:01,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:01,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 311 transitions, 5107 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:01,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:01,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:01,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:02,130 INFO L124 PetriNetUnfolderBase]: 3625/6229 cut-off events. [2024-06-14 13:53:02,130 INFO L125 PetriNetUnfolderBase]: For 353939/353939 co-relation queries the response was YES. [2024-06-14 13:53:02,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44821 conditions, 6229 events. 3625/6229 cut-off events. For 353939/353939 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 43465 event pairs, 1229 based on Foata normal form. 2/6227 useless extension candidates. Maximal degree in co-relation 44712. Up to 5434 conditions per place. [2024-06-14 13:53:02,198 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 227 selfloop transitions, 99 changer transitions 1/333 dead transitions. [2024-06-14 13:53:02,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 333 transitions, 5977 flow [2024-06-14 13:53:02,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:02,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:53:02,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 13:53:02,199 INFO L175 Difference]: Start difference. First operand has 226 places, 311 transitions, 5107 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:53:02,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 333 transitions, 5977 flow [2024-06-14 13:53:03,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 333 transitions, 5608 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:03,463 INFO L231 Difference]: Finished difference. Result has 224 places, 313 transitions, 4991 flow [2024-06-14 13:53:03,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4742, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4991, PETRI_PLACES=224, PETRI_TRANSITIONS=313} [2024-06-14 13:53:03,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-14 13:53:03,464 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 313 transitions, 4991 flow [2024-06-14 13:53:03,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:03,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:03,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:03,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:53:03,464 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:03,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:03,465 INFO L85 PathProgramCache]: Analyzing trace with hash -995829527, now seen corresponding path program 5 times [2024-06-14 13:53:03,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:03,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902688383] [2024-06-14 13:53:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:03,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:03,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:03,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902688383] [2024-06-14 13:53:03,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902688383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:03,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:03,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:03,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013560928] [2024-06-14 13:53:03,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:03,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:03,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:03,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:03,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:03,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:03,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 313 transitions, 4991 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:03,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:03,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:03,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:04,563 INFO L124 PetriNetUnfolderBase]: 3593/6172 cut-off events. [2024-06-14 13:53:04,563 INFO L125 PetriNetUnfolderBase]: For 362889/362907 co-relation queries the response was YES. [2024-06-14 13:53:04,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44332 conditions, 6172 events. 3593/6172 cut-off events. For 362889/362907 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 43020 event pairs, 1240 based on Foata normal form. 13/6177 useless extension candidates. Maximal degree in co-relation 44223. Up to 5378 conditions per place. [2024-06-14 13:53:04,634 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 94 changer transitions 2/328 dead transitions. [2024-06-14 13:53:04,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 328 transitions, 5779 flow [2024-06-14 13:53:04,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:04,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 13:53:04,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-14 13:53:04,636 INFO L175 Difference]: Start difference. First operand has 224 places, 313 transitions, 4991 flow. Second operand 7 states and 160 transitions. [2024-06-14 13:53:04,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 328 transitions, 5779 flow [2024-06-14 13:53:05,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 328 transitions, 5623 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:05,866 INFO L231 Difference]: Finished difference. Result has 226 places, 311 transitions, 4994 flow [2024-06-14 13:53:05,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4835, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4994, PETRI_PLACES=226, PETRI_TRANSITIONS=311} [2024-06-14 13:53:05,866 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-14 13:53:05,867 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 311 transitions, 4994 flow [2024-06-14 13:53:05,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:05,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:05,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:05,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:53:05,867 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:05,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:05,868 INFO L85 PathProgramCache]: Analyzing trace with hash -995949497, now seen corresponding path program 6 times [2024-06-14 13:53:05,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:05,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185417718] [2024-06-14 13:53:05,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:05,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:06,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:06,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185417718] [2024-06-14 13:53:06,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185417718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:06,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:06,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:06,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055278791] [2024-06-14 13:53:06,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:06,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:06,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:06,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:06,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:06,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:06,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 311 transitions, 4994 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:06,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:06,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:06,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:07,034 INFO L124 PetriNetUnfolderBase]: 3480/5970 cut-off events. [2024-06-14 13:53:07,034 INFO L125 PetriNetUnfolderBase]: For 371225/371225 co-relation queries the response was YES. [2024-06-14 13:53:07,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43569 conditions, 5970 events. 3480/5970 cut-off events. For 371225/371225 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 41220 event pairs, 1157 based on Foata normal form. 1/5967 useless extension candidates. Maximal degree in co-relation 43459. Up to 5462 conditions per place. [2024-06-14 13:53:07,103 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 293 selfloop transitions, 18 changer transitions 4/321 dead transitions. [2024-06-14 13:53:07,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 321 transitions, 5648 flow [2024-06-14 13:53:07,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:07,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:07,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-14 13:53:07,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 13:53:07,108 INFO L175 Difference]: Start difference. First operand has 226 places, 311 transitions, 4994 flow. Second operand 6 states and 130 transitions. [2024-06-14 13:53:07,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 321 transitions, 5648 flow [2024-06-14 13:53:08,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 321 transitions, 5187 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:08,348 INFO L231 Difference]: Finished difference. Result has 222 places, 307 transitions, 4496 flow [2024-06-14 13:53:08,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4533, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4496, PETRI_PLACES=222, PETRI_TRANSITIONS=307} [2024-06-14 13:53:08,348 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-14 13:53:08,348 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 307 transitions, 4496 flow [2024-06-14 13:53:08,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:08,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:08,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:08,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:53:08,349 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:08,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:08,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1000402187, now seen corresponding path program 1 times [2024-06-14 13:53:08,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:08,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465256337] [2024-06-14 13:53:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:08,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:08,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:08,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465256337] [2024-06-14 13:53:08,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465256337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:08,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:08,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:08,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212724708] [2024-06-14 13:53:08,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:08,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:08,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:08,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:08,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:08,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:08,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 307 transitions, 4496 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:08,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:08,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:08,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:09,498 INFO L124 PetriNetUnfolderBase]: 3394/5832 cut-off events. [2024-06-14 13:53:09,498 INFO L125 PetriNetUnfolderBase]: For 375785/375787 co-relation queries the response was YES. [2024-06-14 13:53:09,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42482 conditions, 5832 events. 3394/5832 cut-off events. For 375785/375787 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 40096 event pairs, 1109 based on Foata normal form. 3/5833 useless extension candidates. Maximal degree in co-relation 42371. Up to 5172 conditions per place. [2024-06-14 13:53:09,564 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 254 selfloop transitions, 72 changer transitions 0/332 dead transitions. [2024-06-14 13:53:09,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 332 transitions, 5331 flow [2024-06-14 13:53:09,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:09,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 13:53:09,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-14 13:53:09,565 INFO L175 Difference]: Start difference. First operand has 222 places, 307 transitions, 4496 flow. Second operand 9 states and 197 transitions. [2024-06-14 13:53:09,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 332 transitions, 5331 flow [2024-06-14 13:53:10,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 332 transitions, 5158 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:10,617 INFO L231 Difference]: Finished difference. Result has 223 places, 307 transitions, 4473 flow [2024-06-14 13:53:10,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4323, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4473, PETRI_PLACES=223, PETRI_TRANSITIONS=307} [2024-06-14 13:53:10,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-14 13:53:10,618 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 307 transitions, 4473 flow [2024-06-14 13:53:10,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:10,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:10,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:10,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:53:10,619 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:10,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:10,619 INFO L85 PathProgramCache]: Analyzing trace with hash 478165745, now seen corresponding path program 6 times [2024-06-14 13:53:10,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:10,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559740445] [2024-06-14 13:53:10,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:10,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:10,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:10,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559740445] [2024-06-14 13:53:10,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559740445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:10,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:10,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:10,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020145077] [2024-06-14 13:53:10,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:10,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:10,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:10,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:10,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:10,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:10,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 307 transitions, 4473 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:10,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:10,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:10,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:11,851 INFO L124 PetriNetUnfolderBase]: 3399/5832 cut-off events. [2024-06-14 13:53:11,852 INFO L125 PetriNetUnfolderBase]: For 389322/389322 co-relation queries the response was YES. [2024-06-14 13:53:11,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42626 conditions, 5832 events. 3399/5832 cut-off events. For 389322/389322 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 40001 event pairs, 1108 based on Foata normal form. 1/5829 useless extension candidates. Maximal degree in co-relation 42517. Up to 4891 conditions per place. [2024-06-14 13:53:11,910 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 183 selfloop transitions, 156 changer transitions 0/345 dead transitions. [2024-06-14 13:53:11,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 345 transitions, 5775 flow [2024-06-14 13:53:11,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 13:53:11,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:53:11,911 INFO L175 Difference]: Start difference. First operand has 223 places, 307 transitions, 4473 flow. Second operand 10 states and 225 transitions. [2024-06-14 13:53:11,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 345 transitions, 5775 flow [2024-06-14 13:53:12,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 345 transitions, 5603 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:12,928 INFO L231 Difference]: Finished difference. Result has 226 places, 316 transitions, 4927 flow [2024-06-14 13:53:12,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4927, PETRI_PLACES=226, PETRI_TRANSITIONS=316} [2024-06-14 13:53:12,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-14 13:53:12,929 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 316 transitions, 4927 flow [2024-06-14 13:53:12,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:12,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:12,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:12,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:53:12,930 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:12,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:12,930 INFO L85 PathProgramCache]: Analyzing trace with hash -324336847, now seen corresponding path program 2 times [2024-06-14 13:53:12,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:12,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866671974] [2024-06-14 13:53:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:12,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:13,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:13,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866671974] [2024-06-14 13:53:13,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866671974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:13,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:13,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:13,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034548796] [2024-06-14 13:53:13,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:13,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:13,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:13,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:13,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:13,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:13,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 316 transitions, 4927 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:13,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:13,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:13,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:14,121 INFO L124 PetriNetUnfolderBase]: 3404/5850 cut-off events. [2024-06-14 13:53:14,121 INFO L125 PetriNetUnfolderBase]: For 408480/408482 co-relation queries the response was YES. [2024-06-14 13:53:14,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44258 conditions, 5850 events. 3404/5850 cut-off events. For 408480/408482 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 40221 event pairs, 1108 based on Foata normal form. 3/5851 useless extension candidates. Maximal degree in co-relation 44147. Up to 5153 conditions per place. [2024-06-14 13:53:14,193 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 95 changer transitions 0/346 dead transitions. [2024-06-14 13:53:14,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 346 transitions, 5963 flow [2024-06-14 13:53:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:14,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:14,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-14 13:53:14,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 13:53:14,194 INFO L175 Difference]: Start difference. First operand has 226 places, 316 transitions, 4927 flow. Second operand 10 states and 215 transitions. [2024-06-14 13:53:14,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 346 transitions, 5963 flow [2024-06-14 13:53:15,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 346 transitions, 5740 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:15,333 INFO L231 Difference]: Finished difference. Result has 231 places, 319 transitions, 4949 flow [2024-06-14 13:53:15,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4704, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4949, PETRI_PLACES=231, PETRI_TRANSITIONS=319} [2024-06-14 13:53:15,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-14 13:53:15,334 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 319 transitions, 4949 flow [2024-06-14 13:53:15,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:15,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:15,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:15,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:53:15,334 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:15,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:15,335 INFO L85 PathProgramCache]: Analyzing trace with hash -73281087, now seen corresponding path program 7 times [2024-06-14 13:53:15,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:15,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691006270] [2024-06-14 13:53:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:15,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:15,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:15,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691006270] [2024-06-14 13:53:15,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691006270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:15,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:15,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:15,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823282707] [2024-06-14 13:53:15,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:15,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:15,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:15,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:15,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:15,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:15,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 319 transitions, 4949 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:15,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:15,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:15,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:16,623 INFO L124 PetriNetUnfolderBase]: 3409/5853 cut-off events. [2024-06-14 13:53:16,623 INFO L125 PetriNetUnfolderBase]: For 414548/414548 co-relation queries the response was YES. [2024-06-14 13:53:16,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43508 conditions, 5853 events. 3409/5853 cut-off events. For 414548/414548 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40174 event pairs, 1109 based on Foata normal form. 1/5850 useless extension candidates. Maximal degree in co-relation 43395. Up to 4899 conditions per place. [2024-06-14 13:53:16,692 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 182 selfloop transitions, 160 changer transitions 0/348 dead transitions. [2024-06-14 13:53:16,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 348 transitions, 6118 flow [2024-06-14 13:53:16,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-14 13:53:16,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2024-06-14 13:53:16,693 INFO L175 Difference]: Start difference. First operand has 231 places, 319 transitions, 4949 flow. Second operand 10 states and 223 transitions. [2024-06-14 13:53:16,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 348 transitions, 6118 flow [2024-06-14 13:53:18,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 348 transitions, 5900 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:18,076 INFO L231 Difference]: Finished difference. Result has 233 places, 322 transitions, 5126 flow [2024-06-14 13:53:18,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4731, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5126, PETRI_PLACES=233, PETRI_TRANSITIONS=322} [2024-06-14 13:53:18,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-14 13:53:18,076 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 322 transitions, 5126 flow [2024-06-14 13:53:18,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:18,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:18,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:18,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:53:18,077 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:18,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:18,078 INFO L85 PathProgramCache]: Analyzing trace with hash 280994415, now seen corresponding path program 3 times [2024-06-14 13:53:18,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:18,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281465133] [2024-06-14 13:53:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:18,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:18,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:18,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281465133] [2024-06-14 13:53:18,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281465133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:18,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:18,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:18,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283318243] [2024-06-14 13:53:18,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:18,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:18,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:18,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:18,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:18,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:18,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 322 transitions, 5126 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:18,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:18,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:18,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:19,261 INFO L124 PetriNetUnfolderBase]: 3414/5862 cut-off events. [2024-06-14 13:53:19,261 INFO L125 PetriNetUnfolderBase]: For 428400/428402 co-relation queries the response was YES. [2024-06-14 13:53:19,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43977 conditions, 5862 events. 3414/5862 cut-off events. For 428400/428402 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 40243 event pairs, 1105 based on Foata normal form. 3/5863 useless extension candidates. Maximal degree in co-relation 43863. Up to 5166 conditions per place. [2024-06-14 13:53:19,333 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 98 changer transitions 0/349 dead transitions. [2024-06-14 13:53:19,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 349 transitions, 6172 flow [2024-06-14 13:53:19,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:19,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-14 13:53:19,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-14 13:53:19,335 INFO L175 Difference]: Start difference. First operand has 233 places, 322 transitions, 5126 flow. Second operand 10 states and 213 transitions. [2024-06-14 13:53:19,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 349 transitions, 6172 flow [2024-06-14 13:53:20,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 349 transitions, 5811 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:20,777 INFO L231 Difference]: Finished difference. Result has 236 places, 325 transitions, 5020 flow [2024-06-14 13:53:20,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4769, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5020, PETRI_PLACES=236, PETRI_TRANSITIONS=325} [2024-06-14 13:53:20,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-14 13:53:20,778 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 325 transitions, 5020 flow [2024-06-14 13:53:20,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:20,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:20,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:20,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:53:20,779 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:20,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:20,779 INFO L85 PathProgramCache]: Analyzing trace with hash -209592719, now seen corresponding path program 8 times [2024-06-14 13:53:20,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:20,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411438974] [2024-06-14 13:53:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:20,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:21,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:21,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411438974] [2024-06-14 13:53:21,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411438974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:21,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:21,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:21,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667347728] [2024-06-14 13:53:21,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:21,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:21,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:21,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:21,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:21,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:21,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 325 transitions, 5020 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:21,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:21,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:21,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:21,938 INFO L124 PetriNetUnfolderBase]: 3411/5854 cut-off events. [2024-06-14 13:53:21,939 INFO L125 PetriNetUnfolderBase]: For 437976/437976 co-relation queries the response was YES. [2024-06-14 13:53:21,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43852 conditions, 5854 events. 3411/5854 cut-off events. For 437976/437976 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40149 event pairs, 1107 based on Foata normal form. 1/5851 useless extension candidates. Maximal degree in co-relation 43737. Up to 4901 conditions per place. [2024-06-14 13:53:22,009 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 176 selfloop transitions, 165 changer transitions 0/347 dead transitions. [2024-06-14 13:53:22,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 347 transitions, 5998 flow [2024-06-14 13:53:22,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:22,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-14 13:53:22,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-14 13:53:22,011 INFO L175 Difference]: Start difference. First operand has 236 places, 325 transitions, 5020 flow. Second operand 10 states and 218 transitions. [2024-06-14 13:53:22,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 347 transitions, 5998 flow [2024-06-14 13:53:23,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 347 transitions, 5727 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:23,403 INFO L231 Difference]: Finished difference. Result has 239 places, 325 transitions, 5085 flow [2024-06-14 13:53:23,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4749, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5085, PETRI_PLACES=239, PETRI_TRANSITIONS=325} [2024-06-14 13:53:23,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-14 13:53:23,404 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 325 transitions, 5085 flow [2024-06-14 13:53:23,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:23,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:23,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:23,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:53:23,404 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:23,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:23,405 INFO L85 PathProgramCache]: Analyzing trace with hash -209592347, now seen corresponding path program 4 times [2024-06-14 13:53:23,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:23,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151512439] [2024-06-14 13:53:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:23,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:23,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:23,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151512439] [2024-06-14 13:53:23,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151512439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:23,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:23,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:23,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644132900] [2024-06-14 13:53:23,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:23,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:23,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:23,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:23,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:23,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 325 transitions, 5085 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:23,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:23,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:23,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:24,616 INFO L124 PetriNetUnfolderBase]: 3408/5855 cut-off events. [2024-06-14 13:53:24,616 INFO L125 PetriNetUnfolderBase]: For 449447/449449 co-relation queries the response was YES. [2024-06-14 13:53:24,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44106 conditions, 5855 events. 3408/5855 cut-off events. For 449447/449449 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40198 event pairs, 1099 based on Foata normal form. 3/5856 useless extension candidates. Maximal degree in co-relation 43990. Up to 5159 conditions per place. [2024-06-14 13:53:24,689 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 98 changer transitions 0/348 dead transitions. [2024-06-14 13:53:24,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 348 transitions, 5958 flow [2024-06-14 13:53:24,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-14 13:53:24,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-14 13:53:24,691 INFO L175 Difference]: Start difference. First operand has 239 places, 325 transitions, 5085 flow. Second operand 10 states and 211 transitions. [2024-06-14 13:53:24,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 348 transitions, 5958 flow [2024-06-14 13:53:26,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 348 transitions, 5594 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:26,260 INFO L231 Difference]: Finished difference. Result has 239 places, 325 transitions, 4923 flow [2024-06-14 13:53:26,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4721, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4923, PETRI_PLACES=239, PETRI_TRANSITIONS=325} [2024-06-14 13:53:26,261 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-14 13:53:26,261 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 325 transitions, 4923 flow [2024-06-14 13:53:26,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:26,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:26,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:26,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:53:26,262 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:26,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:26,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1642024207, now seen corresponding path program 5 times [2024-06-14 13:53:26,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:26,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747417502] [2024-06-14 13:53:26,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:26,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:26,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:26,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747417502] [2024-06-14 13:53:26,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747417502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:26,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:26,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:26,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117134675] [2024-06-14 13:53:26,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:26,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:26,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:26,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:26,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:26,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:26,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 325 transitions, 4923 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:26,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:26,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:26,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:27,541 INFO L124 PetriNetUnfolderBase]: 3413/5863 cut-off events. [2024-06-14 13:53:27,542 INFO L125 PetriNetUnfolderBase]: For 461670/461672 co-relation queries the response was YES. [2024-06-14 13:53:27,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44148 conditions, 5863 events. 3413/5863 cut-off events. For 461670/461672 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 40257 event pairs, 1106 based on Foata normal form. 3/5864 useless extension candidates. Maximal degree in co-relation 44031. Up to 5198 conditions per place. [2024-06-14 13:53:27,610 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 271 selfloop transitions, 73 changer transitions 0/350 dead transitions. [2024-06-14 13:53:27,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 350 transitions, 5836 flow [2024-06-14 13:53:27,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:27,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 13:53:27,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-14 13:53:27,613 INFO L175 Difference]: Start difference. First operand has 239 places, 325 transitions, 4923 flow. Second operand 9 states and 194 transitions. [2024-06-14 13:53:27,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 350 transitions, 5836 flow [2024-06-14 13:53:29,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 350 transitions, 5514 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-14 13:53:29,274 INFO L231 Difference]: Finished difference. Result has 237 places, 328 transitions, 4789 flow [2024-06-14 13:53:29,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4789, PETRI_PLACES=237, PETRI_TRANSITIONS=328} [2024-06-14 13:53:29,275 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-14 13:53:29,275 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 328 transitions, 4789 flow [2024-06-14 13:53:29,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:29,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:29,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:29,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:53:29,276 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:29,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:29,276 INFO L85 PathProgramCache]: Analyzing trace with hash -994861433, now seen corresponding path program 7 times [2024-06-14 13:53:29,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:29,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191901425] [2024-06-14 13:53:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:29,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:29,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:29,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191901425] [2024-06-14 13:53:29,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191901425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:29,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:29,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:29,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200923083] [2024-06-14 13:53:29,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:29,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:29,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:29,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:29,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:29,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:29,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 328 transitions, 4789 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:29,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:29,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:29,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:30,527 INFO L124 PetriNetUnfolderBase]: 3423/5876 cut-off events. [2024-06-14 13:53:30,528 INFO L125 PetriNetUnfolderBase]: For 476775/476775 co-relation queries the response was YES. [2024-06-14 13:53:30,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44182 conditions, 5876 events. 3423/5876 cut-off events. For 476775/476775 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40336 event pairs, 1115 based on Foata normal form. 2/5874 useless extension candidates. Maximal degree in co-relation 44065. Up to 4999 conditions per place. [2024-06-14 13:53:30,596 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 123 changer transitions 0/355 dead transitions. [2024-06-14 13:53:30,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 355 transitions, 5880 flow [2024-06-14 13:53:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 13:53:30,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-14 13:53:30,597 INFO L175 Difference]: Start difference. First operand has 237 places, 328 transitions, 4789 flow. Second operand 9 states and 202 transitions. [2024-06-14 13:53:30,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 355 transitions, 5880 flow [2024-06-14 13:53:32,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 355 transitions, 5765 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:32,382 INFO L231 Difference]: Finished difference. Result has 240 places, 334 transitions, 5016 flow [2024-06-14 13:53:32,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4674, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5016, PETRI_PLACES=240, PETRI_TRANSITIONS=334} [2024-06-14 13:53:32,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-14 13:53:32,383 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 334 transitions, 5016 flow [2024-06-14 13:53:32,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:32,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:32,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:32,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:53:32,383 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:32,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:32,384 INFO L85 PathProgramCache]: Analyzing trace with hash -800921837, now seen corresponding path program 6 times [2024-06-14 13:53:32,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:32,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459785663] [2024-06-14 13:53:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:32,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:32,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:32,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459785663] [2024-06-14 13:53:32,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459785663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:32,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:32,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:32,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079688903] [2024-06-14 13:53:32,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:32,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:32,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:32,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:32,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:32,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:32,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 334 transitions, 5016 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:32,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:32,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:32,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:33,547 INFO L124 PetriNetUnfolderBase]: 3428/5897 cut-off events. [2024-06-14 13:53:33,547 INFO L125 PetriNetUnfolderBase]: For 491053/491073 co-relation queries the response was YES. [2024-06-14 13:53:33,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44671 conditions, 5897 events. 3428/5897 cut-off events. For 491053/491073 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 40691 event pairs, 1125 based on Foata normal form. 15/5907 useless extension candidates. Maximal degree in co-relation 44553. Up to 5218 conditions per place. [2024-06-14 13:53:33,621 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 273 selfloop transitions, 76 changer transitions 0/355 dead transitions. [2024-06-14 13:53:33,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 355 transitions, 5934 flow [2024-06-14 13:53:33,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 13:53:33,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-14 13:53:33,622 INFO L175 Difference]: Start difference. First operand has 240 places, 334 transitions, 5016 flow. Second operand 8 states and 173 transitions. [2024-06-14 13:53:33,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 355 transitions, 5934 flow [2024-06-14 13:53:35,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 355 transitions, 5774 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:35,160 INFO L231 Difference]: Finished difference. Result has 243 places, 337 transitions, 5051 flow [2024-06-14 13:53:35,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4858, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5051, PETRI_PLACES=243, PETRI_TRANSITIONS=337} [2024-06-14 13:53:35,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-14 13:53:35,161 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 337 transitions, 5051 flow [2024-06-14 13:53:35,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:35,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:35,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:35,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:53:35,162 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:35,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:35,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1448084983, now seen corresponding path program 8 times [2024-06-14 13:53:35,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:35,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056641350] [2024-06-14 13:53:35,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:35,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:35,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:35,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056641350] [2024-06-14 13:53:35,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056641350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:35,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:35,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:35,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498145811] [2024-06-14 13:53:35,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:35,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:35,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:35,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:35,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:35,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:35,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 337 transitions, 5051 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:35,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:35,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:35,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:36,376 INFO L124 PetriNetUnfolderBase]: 3433/5896 cut-off events. [2024-06-14 13:53:36,376 INFO L125 PetriNetUnfolderBase]: For 505524/505542 co-relation queries the response was YES. [2024-06-14 13:53:36,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44839 conditions, 5896 events. 3433/5896 cut-off events. For 505524/505542 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 40548 event pairs, 1144 based on Foata normal form. 13/5901 useless extension candidates. Maximal degree in co-relation 44720. Up to 5007 conditions per place. [2024-06-14 13:53:36,445 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 128 changer transitions 0/358 dead transitions. [2024-06-14 13:53:36,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 358 transitions, 6244 flow [2024-06-14 13:53:36,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:36,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 13:53:36,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 13:53:36,447 INFO L175 Difference]: Start difference. First operand has 243 places, 337 transitions, 5051 flow. Second operand 8 states and 179 transitions. [2024-06-14 13:53:36,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 358 transitions, 6244 flow [2024-06-14 13:53:38,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 358 transitions, 6120 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:38,168 INFO L231 Difference]: Finished difference. Result has 246 places, 340 transitions, 5240 flow [2024-06-14 13:53:38,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5240, PETRI_PLACES=246, PETRI_TRANSITIONS=340} [2024-06-14 13:53:38,168 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 13:53:38,169 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 340 transitions, 5240 flow [2024-06-14 13:53:38,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:38,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:38,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:38,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:53:38,171 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:38,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:38,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1597855431, now seen corresponding path program 9 times [2024-06-14 13:53:38,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:38,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859587810] [2024-06-14 13:53:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:38,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:38,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:38,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859587810] [2024-06-14 13:53:38,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859587810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:38,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:38,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:38,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681809050] [2024-06-14 13:53:38,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:38,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:38,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:38,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:38,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:38,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:38,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 340 transitions, 5240 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:38,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:38,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:38,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:39,343 INFO L124 PetriNetUnfolderBase]: 3438/5901 cut-off events. [2024-06-14 13:53:39,344 INFO L125 PetriNetUnfolderBase]: For 520357/520357 co-relation queries the response was YES. [2024-06-14 13:53:39,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45317 conditions, 5901 events. 3438/5901 cut-off events. For 520357/520357 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 40504 event pairs, 1115 based on Foata normal form. 1/5898 useless extension candidates. Maximal degree in co-relation 45197. Up to 5377 conditions per place. [2024-06-14 13:53:39,414 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 324 selfloop transitions, 24 changer transitions 0/354 dead transitions. [2024-06-14 13:53:39,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 354 transitions, 6019 flow [2024-06-14 13:53:39,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:39,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:39,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-14 13:53:39,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:53:39,416 INFO L175 Difference]: Start difference. First operand has 246 places, 340 transitions, 5240 flow. Second operand 7 states and 147 transitions. [2024-06-14 13:53:39,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 354 transitions, 6019 flow [2024-06-14 13:53:41,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 354 transitions, 5609 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:41,298 INFO L231 Difference]: Finished difference. Result has 246 places, 343 transitions, 4947 flow [2024-06-14 13:53:41,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4838, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4947, PETRI_PLACES=246, PETRI_TRANSITIONS=343} [2024-06-14 13:53:41,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 13:53:41,301 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 343 transitions, 4947 flow [2024-06-14 13:53:41,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:41,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:41,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:41,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:53:41,301 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:41,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:41,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1597975587, now seen corresponding path program 7 times [2024-06-14 13:53:41,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:41,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91215628] [2024-06-14 13:53:41,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:41,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:41,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:41,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91215628] [2024-06-14 13:53:41,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91215628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:41,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:41,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:41,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975867592] [2024-06-14 13:53:41,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:41,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:41,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:41,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:41,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:41,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:41,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 343 transitions, 4947 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:41,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:41,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:41,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:42,452 INFO L124 PetriNetUnfolderBase]: 3435/5909 cut-off events. [2024-06-14 13:53:42,452 INFO L125 PetriNetUnfolderBase]: For 529833/529853 co-relation queries the response was YES. [2024-06-14 13:53:42,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44974 conditions, 5909 events. 3435/5909 cut-off events. For 529833/529853 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 40734 event pairs, 1125 based on Foata normal form. 15/5919 useless extension candidates. Maximal degree in co-relation 44853. Up to 5229 conditions per place. [2024-06-14 13:53:42,519 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 277 selfloop transitions, 78 changer transitions 0/361 dead transitions. [2024-06-14 13:53:42,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 361 transitions, 5710 flow [2024-06-14 13:53:42,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-14 13:53:42,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-14 13:53:42,520 INFO L175 Difference]: Start difference. First operand has 246 places, 343 transitions, 4947 flow. Second operand 9 states and 188 transitions. [2024-06-14 13:53:42,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 361 transitions, 5710 flow [2024-06-14 13:53:44,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 361 transitions, 5617 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:44,555 INFO L231 Difference]: Finished difference. Result has 249 places, 343 transitions, 5016 flow [2024-06-14 13:53:44,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4854, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5016, PETRI_PLACES=249, PETRI_TRANSITIONS=343} [2024-06-14 13:53:44,556 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-14 13:53:44,556 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 343 transitions, 5016 flow [2024-06-14 13:53:44,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:44,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:44,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:44,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:53:44,557 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:44,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:44,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1597975401, now seen corresponding path program 10 times [2024-06-14 13:53:44,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:44,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008261409] [2024-06-14 13:53:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:44,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:44,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:44,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008261409] [2024-06-14 13:53:44,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008261409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:44,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:44,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:44,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399159255] [2024-06-14 13:53:44,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:44,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:44,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:44,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:44,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:44,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:44,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 343 transitions, 5016 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:44,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:44,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:44,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:45,785 INFO L124 PetriNetUnfolderBase]: 3432/5901 cut-off events. [2024-06-14 13:53:45,785 INFO L125 PetriNetUnfolderBase]: For 543079/543097 co-relation queries the response was YES. [2024-06-14 13:53:45,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45252 conditions, 5901 events. 3432/5901 cut-off events. For 543079/543097 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 40643 event pairs, 1146 based on Foata normal form. 13/5906 useless extension candidates. Maximal degree in co-relation 45130. Up to 5007 conditions per place. [2024-06-14 13:53:45,857 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 131 changer transitions 0/360 dead transitions. [2024-06-14 13:53:45,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 360 transitions, 6040 flow [2024-06-14 13:53:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:53:45,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:53:45,858 INFO L175 Difference]: Start difference. First operand has 249 places, 343 transitions, 5016 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:53:45,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 360 transitions, 6040 flow [2024-06-14 13:53:47,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 360 transitions, 5734 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-14 13:53:47,827 INFO L231 Difference]: Finished difference. Result has 246 places, 343 transitions, 4978 flow [2024-06-14 13:53:47,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4710, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4978, PETRI_PLACES=246, PETRI_TRANSITIONS=343} [2024-06-14 13:53:47,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 13:53:47,828 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 343 transitions, 4978 flow [2024-06-14 13:53:47,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:47,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:47,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:47,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:53:47,829 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:47,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:47,829 INFO L85 PathProgramCache]: Analyzing trace with hash -477817067, now seen corresponding path program 1 times [2024-06-14 13:53:47,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:47,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842089910] [2024-06-14 13:53:47,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:47,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:48,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:48,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842089910] [2024-06-14 13:53:48,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842089910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:48,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:48,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:48,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518076] [2024-06-14 13:53:48,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:48,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:48,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:48,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:48,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:48,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:48,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 343 transitions, 4978 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) [2024-06-14 13:53:48,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:48,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:48,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:49,033 INFO L124 PetriNetUnfolderBase]: 3512/6046 cut-off events. [2024-06-14 13:53:49,033 INFO L125 PetriNetUnfolderBase]: For 615337/615339 co-relation queries the response was YES. [2024-06-14 13:53:49,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46172 conditions, 6046 events. 3512/6046 cut-off events. For 615337/615339 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 41775 event pairs, 1036 based on Foata normal form. 26/6070 useless extension candidates. Maximal degree in co-relation 46050. Up to 4914 conditions per place. [2024-06-14 13:53:49,104 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 71 changer transitions 0/378 dead transitions. [2024-06-14 13:53:49,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 378 transitions, 6059 flow [2024-06-14 13:53:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:49,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 13:53:49,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-14 13:53:49,105 INFO L175 Difference]: Start difference. First operand has 246 places, 343 transitions, 4978 flow. Second operand 8 states and 185 transitions. [2024-06-14 13:53:49,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 378 transitions, 6059 flow [2024-06-14 13:53:51,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 378 transitions, 5711 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:51,040 INFO L231 Difference]: Finished difference. Result has 246 places, 347 transitions, 4868 flow [2024-06-14 13:53:51,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4630, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4868, PETRI_PLACES=246, PETRI_TRANSITIONS=347} [2024-06-14 13:53:51,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 13:53:51,041 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 347 transitions, 4868 flow [2024-06-14 13:53:51,041 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) [2024-06-14 13:53:51,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:51,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:51,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:53:51,041 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:51,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:51,042 INFO L85 PathProgramCache]: Analyzing trace with hash 744438695, now seen corresponding path program 2 times [2024-06-14 13:53:51,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:51,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647026993] [2024-06-14 13:53:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:51,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:51,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:51,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647026993] [2024-06-14 13:53:51,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647026993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:51,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:51,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:51,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148788602] [2024-06-14 13:53:51,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:51,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:51,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:51,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:51,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:51,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:51,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 347 transitions, 4868 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:51,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:51,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:51,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:52,320 INFO L124 PetriNetUnfolderBase]: 3552/6114 cut-off events. [2024-06-14 13:53:52,321 INFO L125 PetriNetUnfolderBase]: For 603674/603676 co-relation queries the response was YES. [2024-06-14 13:53:52,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46845 conditions, 6114 events. 3552/6114 cut-off events. For 603674/603676 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 42421 event pairs, 1042 based on Foata normal form. 14/6126 useless extension candidates. Maximal degree in co-relation 46723. Up to 5280 conditions per place. [2024-06-14 13:53:52,387 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 292 selfloop transitions, 81 changer transitions 0/379 dead transitions. [2024-06-14 13:53:52,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 379 transitions, 5751 flow [2024-06-14 13:53:52,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:52,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-14 13:53:52,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 13:53:52,388 INFO L175 Difference]: Start difference. First operand has 246 places, 347 transitions, 4868 flow. Second operand 10 states and 215 transitions. [2024-06-14 13:53:52,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 379 transitions, 5751 flow [2024-06-14 13:53:54,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 379 transitions, 5637 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:54,540 INFO L231 Difference]: Finished difference. Result has 252 places, 349 transitions, 4971 flow [2024-06-14 13:53:54,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4754, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4971, PETRI_PLACES=252, PETRI_TRANSITIONS=349} [2024-06-14 13:53:54,541 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-14 13:53:54,541 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 349 transitions, 4971 flow [2024-06-14 13:53:54,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:54,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:54,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:54,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:53:54,542 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:54,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:54,542 INFO L85 PathProgramCache]: Analyzing trace with hash 833152325, now seen corresponding path program 3 times [2024-06-14 13:53:54,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:54,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358677539] [2024-06-14 13:53:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:54,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:54,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:54,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358677539] [2024-06-14 13:53:54,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358677539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:54,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:54,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:54,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035994808] [2024-06-14 13:53:54,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:54,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:54,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:54,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:54,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:54,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:54,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 349 transitions, 4971 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:54,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:54,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:54,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:55,855 INFO L124 PetriNetUnfolderBase]: 3595/6187 cut-off events. [2024-06-14 13:53:55,855 INFO L125 PetriNetUnfolderBase]: For 625726/625728 co-relation queries the response was YES. [2024-06-14 13:53:55,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47486 conditions, 6187 events. 3595/6187 cut-off events. For 625726/625728 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 43027 event pairs, 1150 based on Foata normal form. 18/6203 useless extension candidates. Maximal degree in co-relation 47362. Up to 5445 conditions per place. [2024-06-14 13:53:55,930 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 302 selfloop transitions, 69 changer transitions 0/377 dead transitions. [2024-06-14 13:53:55,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 377 transitions, 5854 flow [2024-06-14 13:53:55,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:55,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:55,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-14 13:53:55,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-14 13:53:55,932 INFO L175 Difference]: Start difference. First operand has 252 places, 349 transitions, 4971 flow. Second operand 10 states and 212 transitions. [2024-06-14 13:53:55,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 377 transitions, 5854 flow [2024-06-14 13:53:57,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 377 transitions, 5657 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:57,901 INFO L231 Difference]: Finished difference. Result has 254 places, 351 transitions, 4974 flow [2024-06-14 13:53:57,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4774, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4974, PETRI_PLACES=254, PETRI_TRANSITIONS=351} [2024-06-14 13:53:57,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-14 13:53:57,902 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 351 transitions, 4974 flow [2024-06-14 13:53:57,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:57,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:57,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:57,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:53:57,903 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:57,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:57,903 INFO L85 PathProgramCache]: Analyzing trace with hash 281259093, now seen corresponding path program 4 times [2024-06-14 13:53:57,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:57,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306330879] [2024-06-14 13:53:57,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:57,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:58,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:58,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306330879] [2024-06-14 13:53:58,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306330879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:58,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:58,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:58,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637326440] [2024-06-14 13:53:58,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:58,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:58,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:58,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:58,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:58,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:58,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 351 transitions, 4974 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:58,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:58,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:58,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:59,230 INFO L124 PetriNetUnfolderBase]: 3602/6204 cut-off events. [2024-06-14 13:53:59,230 INFO L125 PetriNetUnfolderBase]: For 614680/614682 co-relation queries the response was YES. [2024-06-14 13:53:59,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47132 conditions, 6204 events. 3602/6204 cut-off events. For 614680/614682 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 43197 event pairs, 1137 based on Foata normal form. 14/6216 useless extension candidates. Maximal degree in co-relation 47007. Up to 5396 conditions per place. [2024-06-14 13:53:59,305 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 302 selfloop transitions, 74 changer transitions 0/382 dead transitions. [2024-06-14 13:53:59,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 382 transitions, 5859 flow [2024-06-14 13:53:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:59,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-14 13:53:59,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144124168514412 [2024-06-14 13:53:59,307 INFO L175 Difference]: Start difference. First operand has 254 places, 351 transitions, 4974 flow. Second operand 11 states and 232 transitions. [2024-06-14 13:53:59,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 382 transitions, 5859 flow [2024-06-14 13:54:01,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 382 transitions, 5707 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:01,277 INFO L231 Difference]: Finished difference. Result has 258 places, 352 transitions, 5001 flow [2024-06-14 13:54:01,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4822, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5001, PETRI_PLACES=258, PETRI_TRANSITIONS=352} [2024-06-14 13:54:01,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-14 13:54:01,278 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 352 transitions, 5001 flow [2024-06-14 13:54:01,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:01,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:01,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:01,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:54:01,278 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:01,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:01,279 INFO L85 PathProgramCache]: Analyzing trace with hash -433956481, now seen corresponding path program 1 times [2024-06-14 13:54:01,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:01,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747841311] [2024-06-14 13:54:01,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:01,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:01,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:01,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747841311] [2024-06-14 13:54:01,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747841311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:01,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:01,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:54:01,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179464284] [2024-06-14 13:54:01,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:01,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:54:01,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:01,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:54:01,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:54:01,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:01,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 352 transitions, 5001 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) [2024-06-14 13:54:01,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:01,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:01,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:02,569 INFO L124 PetriNetUnfolderBase]: 3673/6325 cut-off events. [2024-06-14 13:54:02,569 INFO L125 PetriNetUnfolderBase]: For 613562/613564 co-relation queries the response was YES. [2024-06-14 13:54:02,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47317 conditions, 6325 events. 3673/6325 cut-off events. For 613562/613564 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 44241 event pairs, 1146 based on Foata normal form. 14/6337 useless extension candidates. Maximal degree in co-relation 47191. Up to 5531 conditions per place. [2024-06-14 13:54:02,644 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 337 selfloop transitions, 39 changer transitions 0/382 dead transitions. [2024-06-14 13:54:02,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 382 transitions, 5929 flow [2024-06-14 13:54:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:02,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 13:54:02,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:54:02,646 INFO L175 Difference]: Start difference. First operand has 258 places, 352 transitions, 5001 flow. Second operand 8 states and 176 transitions. [2024-06-14 13:54:02,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 382 transitions, 5929 flow [2024-06-14 13:54:04,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 382 transitions, 5738 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:04,599 INFO L231 Difference]: Finished difference. Result has 259 places, 358 transitions, 5004 flow [2024-06-14 13:54:04,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4810, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5004, PETRI_PLACES=259, PETRI_TRANSITIONS=358} [2024-06-14 13:54:04,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-14 13:54:04,600 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 358 transitions, 5004 flow [2024-06-14 13:54:04,600 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) [2024-06-14 13:54:04,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:04,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:04,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:54:04,601 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:04,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:04,601 INFO L85 PathProgramCache]: Analyzing trace with hash -570935637, now seen corresponding path program 1 times [2024-06-14 13:54:04,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:04,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839896036] [2024-06-14 13:54:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:04,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:04,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:04,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839896036] [2024-06-14 13:54:04,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839896036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:04,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:04,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:04,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933665386] [2024-06-14 13:54:04,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:04,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:04,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:04,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:04,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:04,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:04,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 358 transitions, 5004 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:04,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:04,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:04,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:05,941 INFO L124 PetriNetUnfolderBase]: 3670/6316 cut-off events. [2024-06-14 13:54:05,941 INFO L125 PetriNetUnfolderBase]: For 593751/593751 co-relation queries the response was YES. [2024-06-14 13:54:05,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47249 conditions, 6316 events. 3670/6316 cut-off events. For 593751/593751 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 44128 event pairs, 1167 based on Foata normal form. 1/6313 useless extension candidates. Maximal degree in co-relation 47120. Up to 5602 conditions per place. [2024-06-14 13:54:06,017 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 292 selfloop transitions, 78 changer transitions 0/376 dead transitions. [2024-06-14 13:54:06,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 376 transitions, 5788 flow [2024-06-14 13:54:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:54:06,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 13:54:06,019 INFO L175 Difference]: Start difference. First operand has 259 places, 358 transitions, 5004 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:54:06,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 376 transitions, 5788 flow [2024-06-14 13:54:08,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 376 transitions, 5678 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 13:54:08,260 INFO L231 Difference]: Finished difference. Result has 263 places, 358 transitions, 5061 flow [2024-06-14 13:54:08,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4894, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5061, PETRI_PLACES=263, PETRI_TRANSITIONS=358} [2024-06-14 13:54:08,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-14 13:54:08,261 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 358 transitions, 5061 flow [2024-06-14 13:54:08,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:08,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:08,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:08,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:54:08,261 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:08,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:08,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1279037183, now seen corresponding path program 2 times [2024-06-14 13:54:08,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:08,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028440945] [2024-06-14 13:54:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:08,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:08,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:08,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028440945] [2024-06-14 13:54:08,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028440945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:08,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:08,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:08,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699115518] [2024-06-14 13:54:08,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:08,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:08,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:08,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:08,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:08,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:08,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 358 transitions, 5061 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:08,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:08,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:08,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:09,570 INFO L124 PetriNetUnfolderBase]: 3675/6325 cut-off events. [2024-06-14 13:54:09,570 INFO L125 PetriNetUnfolderBase]: For 607437/607437 co-relation queries the response was YES. [2024-06-14 13:54:09,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47261 conditions, 6325 events. 3675/6325 cut-off events. For 607437/607437 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 44220 event pairs, 1167 based on Foata normal form. 1/6322 useless extension candidates. Maximal degree in co-relation 47132. Up to 5446 conditions per place. [2024-06-14 13:54:09,644 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 255 selfloop transitions, 124 changer transitions 0/385 dead transitions. [2024-06-14 13:54:09,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 385 transitions, 6074 flow [2024-06-14 13:54:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:09,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 13:54:09,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-14 13:54:09,645 INFO L175 Difference]: Start difference. First operand has 263 places, 358 transitions, 5061 flow. Second operand 10 states and 219 transitions. [2024-06-14 13:54:09,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 385 transitions, 6074 flow [2024-06-14 13:54:11,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 385 transitions, 5924 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:11,651 INFO L231 Difference]: Finished difference. Result has 267 places, 361 transitions, 5210 flow [2024-06-14 13:54:11,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4911, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5210, PETRI_PLACES=267, PETRI_TRANSITIONS=361} [2024-06-14 13:54:11,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-14 13:54:11,652 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 361 transitions, 5210 flow [2024-06-14 13:54:11,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:11,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:11,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:11,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:54:11,653 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:11,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:11,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1269771593, now seen corresponding path program 3 times [2024-06-14 13:54:11,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:11,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641570861] [2024-06-14 13:54:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:11,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:11,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:11,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641570861] [2024-06-14 13:54:11,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641570861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:11,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:11,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:11,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504675513] [2024-06-14 13:54:11,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:11,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:11,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:11,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:11,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:11,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:11,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 361 transitions, 5210 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:11,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:11,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:11,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:12,942 INFO L124 PetriNetUnfolderBase]: 3680/6334 cut-off events. [2024-06-14 13:54:12,942 INFO L125 PetriNetUnfolderBase]: For 623420/623420 co-relation queries the response was YES. [2024-06-14 13:54:12,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47632 conditions, 6334 events. 3680/6334 cut-off events. For 623420/623420 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 44247 event pairs, 1167 based on Foata normal form. 1/6331 useless extension candidates. Maximal degree in co-relation 47503. Up to 5452 conditions per place. [2024-06-14 13:54:13,017 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 252 selfloop transitions, 127 changer transitions 0/385 dead transitions. [2024-06-14 13:54:13,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 385 transitions, 6223 flow [2024-06-14 13:54:13,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:13,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:13,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 13:54:13,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-14 13:54:13,019 INFO L175 Difference]: Start difference. First operand has 267 places, 361 transitions, 5210 flow. Second operand 10 states and 219 transitions. [2024-06-14 13:54:13,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 385 transitions, 6223 flow [2024-06-14 13:54:14,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 385 transitions, 5951 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:54:14,588 INFO L231 Difference]: Finished difference. Result has 269 places, 364 transitions, 5250 flow [2024-06-14 13:54:14,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4944, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5250, PETRI_PLACES=269, PETRI_TRANSITIONS=364} [2024-06-14 13:54:14,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-14 13:54:14,589 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 364 transitions, 5250 flow [2024-06-14 13:54:14,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:14,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:14,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:14,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:54:14,590 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:14,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:14,590 INFO L85 PathProgramCache]: Analyzing trace with hash -697795187, now seen corresponding path program 4 times [2024-06-14 13:54:14,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:14,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590605516] [2024-06-14 13:54:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:14,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:14,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:14,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590605516] [2024-06-14 13:54:14,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590605516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:14,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:14,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:14,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963772482] [2024-06-14 13:54:14,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:14,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:14,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:14,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:14,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:14,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:14,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 364 transitions, 5250 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:14,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:14,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:14,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:16,045 INFO L124 PetriNetUnfolderBase]: 3685/6343 cut-off events. [2024-06-14 13:54:16,046 INFO L125 PetriNetUnfolderBase]: For 638747/638747 co-relation queries the response was YES. [2024-06-14 13:54:16,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47877 conditions, 6343 events. 3685/6343 cut-off events. For 638747/638747 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 44355 event pairs, 1167 based on Foata normal form. 1/6340 useless extension candidates. Maximal degree in co-relation 47747. Up to 5458 conditions per place. [2024-06-14 13:54:16,120 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 252 selfloop transitions, 132 changer transitions 0/390 dead transitions. [2024-06-14 13:54:16,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 390 transitions, 6279 flow [2024-06-14 13:54:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:54:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:54:16,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-14 13:54:16,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142276422764228 [2024-06-14 13:54:16,122 INFO L175 Difference]: Start difference. First operand has 269 places, 364 transitions, 5250 flow. Second operand 12 states and 253 transitions. [2024-06-14 13:54:16,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 390 transitions, 6279 flow [2024-06-14 13:54:17,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 390 transitions, 6007 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:17,576 INFO L231 Difference]: Finished difference. Result has 274 places, 367 transitions, 5299 flow [2024-06-14 13:54:17,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4993, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5299, PETRI_PLACES=274, PETRI_TRANSITIONS=367} [2024-06-14 13:54:17,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-14 13:54:17,576 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 367 transitions, 5299 flow [2024-06-14 13:54:17,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:17,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:17,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:17,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:54:17,577 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:17,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:17,577 INFO L85 PathProgramCache]: Analyzing trace with hash -873283397, now seen corresponding path program 5 times [2024-06-14 13:54:17,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:17,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902013429] [2024-06-14 13:54:17,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:17,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:17,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:17,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902013429] [2024-06-14 13:54:17,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902013429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:17,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:17,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:17,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533326604] [2024-06-14 13:54:17,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:17,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:17,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:17,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:17,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:17,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:17,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 367 transitions, 5299 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:17,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:17,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:17,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:18,915 INFO L124 PetriNetUnfolderBase]: 3682/6339 cut-off events. [2024-06-14 13:54:18,916 INFO L125 PetriNetUnfolderBase]: For 651457/651457 co-relation queries the response was YES. [2024-06-14 13:54:18,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47953 conditions, 6339 events. 3682/6339 cut-off events. For 651457/651457 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 44378 event pairs, 1167 based on Foata normal form. 1/6336 useless extension candidates. Maximal degree in co-relation 47822. Up to 5455 conditions per place. [2024-06-14 13:54:18,997 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 263 selfloop transitions, 128 changer transitions 0/397 dead transitions. [2024-06-14 13:54:18,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 397 transitions, 6155 flow [2024-06-14 13:54:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:54:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:54:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-14 13:54:18,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:54:18,998 INFO L175 Difference]: Start difference. First operand has 274 places, 367 transitions, 5299 flow. Second operand 11 states and 242 transitions. [2024-06-14 13:54:18,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 397 transitions, 6155 flow [2024-06-14 13:54:20,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 397 transitions, 5879 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 13:54:20,668 INFO L231 Difference]: Finished difference. Result has 275 places, 367 transitions, 5285 flow [2024-06-14 13:54:20,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5023, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5285, PETRI_PLACES=275, PETRI_TRANSITIONS=367} [2024-06-14 13:54:20,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-14 13:54:20,668 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 367 transitions, 5285 flow [2024-06-14 13:54:20,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:20,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:20,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:20,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:54:20,669 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:20,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:20,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2020404330, now seen corresponding path program 1 times [2024-06-14 13:54:20,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:20,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978465312] [2024-06-14 13:54:20,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:20,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:20,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:20,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978465312] [2024-06-14 13:54:20,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978465312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:20,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:20,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:20,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571097144] [2024-06-14 13:54:20,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:20,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:20,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:20,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:20,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:20,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:20,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 367 transitions, 5285 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:20,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:20,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:20,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:22,009 INFO L124 PetriNetUnfolderBase]: 3703/6366 cut-off events. [2024-06-14 13:54:22,009 INFO L125 PetriNetUnfolderBase]: For 680722/680724 co-relation queries the response was YES. [2024-06-14 13:54:22,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48787 conditions, 6366 events. 3703/6366 cut-off events. For 680722/680724 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 44541 event pairs, 1149 based on Foata normal form. 4/6366 useless extension candidates. Maximal degree in co-relation 48655. Up to 5580 conditions per place. [2024-06-14 13:54:22,088 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 285 selfloop transitions, 110 changer transitions 0/401 dead transitions. [2024-06-14 13:54:22,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 401 transitions, 6481 flow [2024-06-14 13:54:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:22,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-14 13:54:22,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-14 13:54:22,089 INFO L175 Difference]: Start difference. First operand has 275 places, 367 transitions, 5285 flow. Second operand 10 states and 218 transitions. [2024-06-14 13:54:22,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 401 transitions, 6481 flow [2024-06-14 13:54:24,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 401 transitions, 6095 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-14 13:54:24,451 INFO L231 Difference]: Finished difference. Result has 273 places, 371 transitions, 5300 flow [2024-06-14 13:54:24,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4899, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5300, PETRI_PLACES=273, PETRI_TRANSITIONS=371} [2024-06-14 13:54:24,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-14 13:54:24,452 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 371 transitions, 5300 flow [2024-06-14 13:54:24,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:24,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:24,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:24,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:54:24,452 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:24,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:24,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1947498328, now seen corresponding path program 2 times [2024-06-14 13:54:24,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:24,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942273602] [2024-06-14 13:54:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:24,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:24,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:24,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942273602] [2024-06-14 13:54:24,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942273602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:24,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:24,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:24,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582331171] [2024-06-14 13:54:24,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:24,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:24,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:24,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:24,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:24,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 371 transitions, 5300 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:24,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:24,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:24,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:25,814 INFO L124 PetriNetUnfolderBase]: 3711/6387 cut-off events. [2024-06-14 13:54:25,814 INFO L125 PetriNetUnfolderBase]: For 698028/698030 co-relation queries the response was YES. [2024-06-14 13:54:25,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49091 conditions, 6387 events. 3711/6387 cut-off events. For 698028/698030 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 44784 event pairs, 1160 based on Foata normal form. 4/6389 useless extension candidates. Maximal degree in co-relation 48958. Up to 5629 conditions per place. [2024-06-14 13:54:25,893 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 286 selfloop transitions, 106 changer transitions 0/398 dead transitions. [2024-06-14 13:54:25,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 398 transitions, 6236 flow [2024-06-14 13:54:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:25,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-14 13:54:25,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-14 13:54:25,894 INFO L175 Difference]: Start difference. First operand has 273 places, 371 transitions, 5300 flow. Second operand 10 states and 213 transitions. [2024-06-14 13:54:25,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 398 transitions, 6236 flow [2024-06-14 13:54:28,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 398 transitions, 5980 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:28,516 INFO L231 Difference]: Finished difference. Result has 277 places, 373 transitions, 5355 flow [2024-06-14 13:54:28,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5066, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5355, PETRI_PLACES=277, PETRI_TRANSITIONS=373} [2024-06-14 13:54:28,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-14 13:54:28,516 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 373 transitions, 5355 flow [2024-06-14 13:54:28,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:28,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:28,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:28,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:54:28,517 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:28,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:28,517 INFO L85 PathProgramCache]: Analyzing trace with hash 465077551, now seen corresponding path program 6 times [2024-06-14 13:54:28,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:28,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053744432] [2024-06-14 13:54:28,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:28,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:28,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:28,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053744432] [2024-06-14 13:54:28,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053744432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:28,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:28,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:28,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668213314] [2024-06-14 13:54:28,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:28,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:28,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:28,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:28,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:28,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:28,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 373 transitions, 5355 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:28,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:28,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:28,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:29,884 INFO L124 PetriNetUnfolderBase]: 3716/6387 cut-off events. [2024-06-14 13:54:29,885 INFO L125 PetriNetUnfolderBase]: For 707865/707865 co-relation queries the response was YES. [2024-06-14 13:54:29,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49346 conditions, 6387 events. 3716/6387 cut-off events. For 707865/707865 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 44661 event pairs, 1168 based on Foata normal form. 1/6384 useless extension candidates. Maximal degree in co-relation 49211. Up to 5456 conditions per place. [2024-06-14 13:54:29,965 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 262 selfloop transitions, 138 changer transitions 0/406 dead transitions. [2024-06-14 13:54:29,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 406 transitions, 6595 flow [2024-06-14 13:54:29,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:54:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:54:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-14 13:54:29,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 13:54:29,967 INFO L175 Difference]: Start difference. First operand has 277 places, 373 transitions, 5355 flow. Second operand 12 states and 258 transitions. [2024-06-14 13:54:29,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 406 transitions, 6595 flow [2024-06-14 13:54:32,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 406 transitions, 6326 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 13:54:32,566 INFO L231 Difference]: Finished difference. Result has 281 places, 376 transitions, 5408 flow [2024-06-14 13:54:32,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5086, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5408, PETRI_PLACES=281, PETRI_TRANSITIONS=376} [2024-06-14 13:54:32,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-14 13:54:32,567 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 376 transitions, 5408 flow [2024-06-14 13:54:32,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:32,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:32,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:32,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:54:32,568 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:32,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:32,568 INFO L85 PathProgramCache]: Analyzing trace with hash -947696009, now seen corresponding path program 7 times [2024-06-14 13:54:32,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:32,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539201891] [2024-06-14 13:54:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:32,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:32,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:32,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539201891] [2024-06-14 13:54:32,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539201891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:32,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:32,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:32,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846600182] [2024-06-14 13:54:32,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:32,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:32,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:32,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:32,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:32,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:32,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 376 transitions, 5408 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:32,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:32,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:32,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:33,971 INFO L124 PetriNetUnfolderBase]: 3713/6387 cut-off events. [2024-06-14 13:54:33,972 INFO L125 PetriNetUnfolderBase]: For 720533/720533 co-relation queries the response was YES. [2024-06-14 13:54:34,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49445 conditions, 6387 events. 3713/6387 cut-off events. For 720533/720533 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 44673 event pairs, 1170 based on Foata normal form. 1/6384 useless extension candidates. Maximal degree in co-relation 49309. Up to 5453 conditions per place. [2024-06-14 13:54:34,045 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 257 selfloop transitions, 137 changer transitions 0/400 dead transitions. [2024-06-14 13:54:34,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 400 transitions, 6420 flow [2024-06-14 13:54:34,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:34,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-14 13:54:34,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-14 13:54:34,048 INFO L175 Difference]: Start difference. First operand has 281 places, 376 transitions, 5408 flow. Second operand 10 states and 221 transitions. [2024-06-14 13:54:34,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 400 transitions, 6420 flow [2024-06-14 13:54:36,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 400 transitions, 6072 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-14 13:54:36,732 INFO L231 Difference]: Finished difference. Result has 281 places, 376 transitions, 5340 flow [2024-06-14 13:54:36,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5060, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5340, PETRI_PLACES=281, PETRI_TRANSITIONS=376} [2024-06-14 13:54:36,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-14 13:54:36,733 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 376 transitions, 5340 flow [2024-06-14 13:54:36,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:36,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:36,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:36,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:54:36,734 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:36,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:36,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2014000257, now seen corresponding path program 8 times [2024-06-14 13:54:36,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:36,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538896624] [2024-06-14 13:54:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:36,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:37,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:37,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538896624] [2024-06-14 13:54:37,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538896624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:37,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:37,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:37,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521232515] [2024-06-14 13:54:37,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:37,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:37,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:37,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:37,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:37,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:37,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 376 transitions, 5340 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:37,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:37,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:37,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:38,174 INFO L124 PetriNetUnfolderBase]: 3718/6396 cut-off events. [2024-06-14 13:54:38,175 INFO L125 PetriNetUnfolderBase]: For 736195/736195 co-relation queries the response was YES. [2024-06-14 13:54:38,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49637 conditions, 6396 events. 3718/6396 cut-off events. For 736195/736195 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44793 event pairs, 1170 based on Foata normal form. 1/6393 useless extension candidates. Maximal degree in co-relation 49500. Up to 5372 conditions per place. [2024-06-14 13:54:38,257 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 208 selfloop transitions, 194 changer transitions 0/408 dead transitions. [2024-06-14 13:54:38,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 408 transitions, 6599 flow [2024-06-14 13:54:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:54:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:54:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-14 13:54:38,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-14 13:54:38,259 INFO L175 Difference]: Start difference. First operand has 281 places, 376 transitions, 5340 flow. Second operand 11 states and 241 transitions. [2024-06-14 13:54:38,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 408 transitions, 6599 flow [2024-06-14 13:54:40,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 408 transitions, 6325 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:40,995 INFO L231 Difference]: Finished difference. Result has 283 places, 379 transitions, 5509 flow [2024-06-14 13:54:40,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5066, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5509, PETRI_PLACES=283, PETRI_TRANSITIONS=379} [2024-06-14 13:54:40,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-14 13:54:40,996 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 379 transitions, 5509 flow [2024-06-14 13:54:40,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:40,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:40,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:40,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:54:40,997 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:40,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:40,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2023265847, now seen corresponding path program 9 times [2024-06-14 13:54:40,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:40,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329942483] [2024-06-14 13:54:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:40,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:41,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:41,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329942483] [2024-06-14 13:54:41,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329942483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:41,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:41,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:41,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698826448] [2024-06-14 13:54:41,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:41,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:41,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:41,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:41,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:41,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:41,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 379 transitions, 5509 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:41,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:41,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:41,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:42,374 INFO L124 PetriNetUnfolderBase]: 3731/6418 cut-off events. [2024-06-14 13:54:42,375 INFO L125 PetriNetUnfolderBase]: For 757641/757641 co-relation queries the response was YES. [2024-06-14 13:54:42,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50227 conditions, 6418 events. 3731/6418 cut-off events. For 757641/757641 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44952 event pairs, 1170 based on Foata normal form. 1/6415 useless extension candidates. Maximal degree in co-relation 50089. Up to 5387 conditions per place. [2024-06-14 13:54:42,454 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 207 selfloop transitions, 199 changer transitions 0/412 dead transitions. [2024-06-14 13:54:42,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 412 transitions, 7005 flow [2024-06-14 13:54:42,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:54:42,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:54:42,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-14 13:54:42,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-14 13:54:42,464 INFO L175 Difference]: Start difference. First operand has 283 places, 379 transitions, 5509 flow. Second operand 11 states and 241 transitions. [2024-06-14 13:54:42,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 412 transitions, 7005 flow [2024-06-14 13:54:45,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 412 transitions, 6571 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:45,138 INFO L231 Difference]: Finished difference. Result has 285 places, 385 transitions, 5589 flow [2024-06-14 13:54:45,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5087, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5589, PETRI_PLACES=285, PETRI_TRANSITIONS=385} [2024-06-14 13:54:45,139 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-14 13:54:45,139 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 385 transitions, 5589 flow [2024-06-14 13:54:45,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:45,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:45,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:45,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:54:45,140 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:45,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:45,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2023254687, now seen corresponding path program 10 times [2024-06-14 13:54:45,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:45,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047145801] [2024-06-14 13:54:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:45,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:45,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:45,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047145801] [2024-06-14 13:54:45,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047145801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:45,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:45,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:45,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449874378] [2024-06-14 13:54:45,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:45,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:45,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:45,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:45,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:45,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:45,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 385 transitions, 5589 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:45,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:45,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:45,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:46,493 INFO L124 PetriNetUnfolderBase]: 3728/6414 cut-off events. [2024-06-14 13:54:46,494 INFO L125 PetriNetUnfolderBase]: For 770770/770770 co-relation queries the response was YES. [2024-06-14 13:54:46,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50274 conditions, 6414 events. 3728/6414 cut-off events. For 770770/770770 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44908 event pairs, 1170 based on Foata normal form. 1/6411 useless extension candidates. Maximal degree in co-relation 50135. Up to 5384 conditions per place. [2024-06-14 13:54:46,580 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 207 selfloop transitions, 200 changer transitions 0/413 dead transitions. [2024-06-14 13:54:46,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 413 transitions, 6813 flow [2024-06-14 13:54:46,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:54:46,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:54:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-06-14 13:54:46,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5140712945590994 [2024-06-14 13:54:46,582 INFO L175 Difference]: Start difference. First operand has 285 places, 385 transitions, 5589 flow. Second operand 13 states and 274 transitions. [2024-06-14 13:54:46,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 413 transitions, 6813 flow [2024-06-14 13:54:49,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 413 transitions, 6479 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:49,981 INFO L231 Difference]: Finished difference. Result has 291 places, 385 transitions, 5661 flow [2024-06-14 13:54:49,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5255, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5661, PETRI_PLACES=291, PETRI_TRANSITIONS=385} [2024-06-14 13:54:49,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-14 13:54:49,981 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 385 transitions, 5661 flow [2024-06-14 13:54:49,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:49,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:49,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:49,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:54:49,982 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:49,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:49,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1204183888, now seen corresponding path program 3 times [2024-06-14 13:54:49,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:49,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022203638] [2024-06-14 13:54:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:49,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:50,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:50,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022203638] [2024-06-14 13:54:50,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022203638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:50,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:50,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:50,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95777806] [2024-06-14 13:54:50,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:50,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:50,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:50,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:50,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:50,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:50,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 385 transitions, 5661 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:50,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:50,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:50,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:51,380 INFO L124 PetriNetUnfolderBase]: 3736/6431 cut-off events. [2024-06-14 13:54:51,380 INFO L125 PetriNetUnfolderBase]: For 794485/794487 co-relation queries the response was YES. [2024-06-14 13:54:51,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50700 conditions, 6431 events. 3736/6431 cut-off events. For 794485/794487 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 45156 event pairs, 1024 based on Foata normal form. 4/6433 useless extension candidates. Maximal degree in co-relation 50560. Up to 5388 conditions per place. [2024-06-14 13:54:51,466 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 289 selfloop transitions, 129 changer transitions 0/424 dead transitions. [2024-06-14 13:54:51,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 424 transitions, 7129 flow [2024-06-14 13:54:51,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-14 13:54:51,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2024-06-14 13:54:51,467 INFO L175 Difference]: Start difference. First operand has 291 places, 385 transitions, 5661 flow. Second operand 10 states and 223 transitions. [2024-06-14 13:54:51,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 424 transitions, 7129 flow [2024-06-14 13:54:53,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 424 transitions, 6595 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-14 13:54:53,740 INFO L231 Difference]: Finished difference. Result has 288 places, 389 transitions, 5574 flow [2024-06-14 13:54:53,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5127, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5574, PETRI_PLACES=288, PETRI_TRANSITIONS=389} [2024-06-14 13:54:53,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-14 13:54:53,740 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 389 transitions, 5574 flow [2024-06-14 13:54:53,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:53,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:53,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:53,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:54:53,741 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:53,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:53,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1678513258, now seen corresponding path program 4 times [2024-06-14 13:54:53,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:53,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779391622] [2024-06-14 13:54:53,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:53,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:54,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:54,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779391622] [2024-06-14 13:54:54,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779391622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:54,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:54,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:54,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964880519] [2024-06-14 13:54:54,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:54,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:54,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:54,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:54,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:54,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:54,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 389 transitions, 5574 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:54,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:54,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:54,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:55,201 INFO L124 PetriNetUnfolderBase]: 3744/6439 cut-off events. [2024-06-14 13:54:55,201 INFO L125 PetriNetUnfolderBase]: For 813281/813283 co-relation queries the response was YES. [2024-06-14 13:54:55,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51036 conditions, 6439 events. 3744/6439 cut-off events. For 813281/813283 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 45065 event pairs, 1026 based on Foata normal form. 4/6441 useless extension candidates. Maximal degree in co-relation 50895. Up to 5396 conditions per place. [2024-06-14 13:54:55,282 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 285 selfloop transitions, 131 changer transitions 0/422 dead transitions. [2024-06-14 13:54:55,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 422 transitions, 6770 flow [2024-06-14 13:54:55,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 13:54:55,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-14 13:54:55,293 INFO L175 Difference]: Start difference. First operand has 288 places, 389 transitions, 5574 flow. Second operand 10 states and 219 transitions. [2024-06-14 13:54:55,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 422 transitions, 6770 flow [2024-06-14 13:54:57,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 422 transitions, 6386 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:57,453 INFO L231 Difference]: Finished difference. Result has 291 places, 391 transitions, 5551 flow [2024-06-14 13:54:57,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5216, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5551, PETRI_PLACES=291, PETRI_TRANSITIONS=391} [2024-06-14 13:54:57,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-14 13:54:57,454 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 391 transitions, 5551 flow [2024-06-14 13:54:57,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:57,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:57,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:57,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:54:57,454 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:57,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash 129084522, now seen corresponding path program 5 times [2024-06-14 13:54:57,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:57,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168986526] [2024-06-14 13:54:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:57,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:57,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168986526] [2024-06-14 13:54:57,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168986526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:57,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:57,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:57,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987408820] [2024-06-14 13:54:57,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:57,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:57,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:57,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:57,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 391 transitions, 5551 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:57,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:57,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:57,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:58,830 INFO L124 PetriNetUnfolderBase]: 3739/6428 cut-off events. [2024-06-14 13:54:58,831 INFO L125 PetriNetUnfolderBase]: For 818196/818198 co-relation queries the response was YES. [2024-06-14 13:54:58,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50742 conditions, 6428 events. 3739/6428 cut-off events. For 818196/818198 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 44999 event pairs, 1155 based on Foata normal form. 4/6426 useless extension candidates. Maximal degree in co-relation 50600. Up to 5639 conditions per place. [2024-06-14 13:54:58,916 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 297 selfloop transitions, 112 changer transitions 0/415 dead transitions. [2024-06-14 13:54:58,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 415 transitions, 6605 flow [2024-06-14 13:54:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-14 13:54:58,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-14 13:54:58,918 INFO L175 Difference]: Start difference. First operand has 291 places, 391 transitions, 5551 flow. Second operand 10 states and 212 transitions. [2024-06-14 13:54:58,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 415 transitions, 6605 flow [2024-06-14 13:55:01,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 415 transitions, 6267 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-14 13:55:01,674 INFO L231 Difference]: Finished difference. Result has 294 places, 391 transitions, 5442 flow [2024-06-14 13:55:01,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5213, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5442, PETRI_PLACES=294, PETRI_TRANSITIONS=391} [2024-06-14 13:55:01,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-14 13:55:01,683 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 391 transitions, 5442 flow [2024-06-14 13:55:01,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:01,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:01,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:01,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:55:01,684 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:01,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:01,684 INFO L85 PathProgramCache]: Analyzing trace with hash 120513642, now seen corresponding path program 6 times [2024-06-14 13:55:01,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:01,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839624955] [2024-06-14 13:55:01,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:01,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:01,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:01,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839624955] [2024-06-14 13:55:01,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839624955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:01,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:01,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:55:01,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35152477] [2024-06-14 13:55:01,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:01,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:55:01,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:01,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:55:01,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:55:02,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:02,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 391 transitions, 5442 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:02,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:02,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:02,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:03,055 INFO L124 PetriNetUnfolderBase]: 3734/6429 cut-off events. [2024-06-14 13:55:03,056 INFO L125 PetriNetUnfolderBase]: For 825367/825369 co-relation queries the response was YES. [2024-06-14 13:55:03,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50359 conditions, 6429 events. 3734/6429 cut-off events. For 825367/825369 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 45053 event pairs, 1162 based on Foata normal form. 4/6431 useless extension candidates. Maximal degree in co-relation 50216. Up to 5663 conditions per place. [2024-06-14 13:55:03,135 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 106 changer transitions 0/413 dead transitions. [2024-06-14 13:55:03,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 413 transitions, 6310 flow [2024-06-14 13:55:03,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:55:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:55:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-14 13:55:03,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:55:03,137 INFO L175 Difference]: Start difference. First operand has 294 places, 391 transitions, 5442 flow. Second operand 10 states and 210 transitions. [2024-06-14 13:55:03,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 413 transitions, 6310 flow [2024-06-14 13:55:05,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 413 transitions, 5988 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-14 13:55:05,872 INFO L231 Difference]: Finished difference. Result has 295 places, 391 transitions, 5337 flow [2024-06-14 13:55:05,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5120, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5337, PETRI_PLACES=295, PETRI_TRANSITIONS=391} [2024-06-14 13:55:05,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-14 13:55:05,873 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 391 transitions, 5337 flow [2024-06-14 13:55:05,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:05,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:05,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:05,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:55:05,874 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:05,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:05,874 INFO L85 PathProgramCache]: Analyzing trace with hash 133405209, now seen corresponding path program 11 times [2024-06-14 13:55:05,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:05,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845457351] [2024-06-14 13:55:05,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:05,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:06,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:06,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845457351] [2024-06-14 13:55:06,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845457351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:06,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:06,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:55:06,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250838163] [2024-06-14 13:55:06,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:06,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:55:06,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:06,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:55:06,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:55:06,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:06,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 391 transitions, 5337 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:06,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:06,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:06,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:07,320 INFO L124 PetriNetUnfolderBase]: 3739/6429 cut-off events. [2024-06-14 13:55:07,320 INFO L125 PetriNetUnfolderBase]: For 836955/836955 co-relation queries the response was YES. [2024-06-14 13:55:07,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50391 conditions, 6429 events. 3739/6429 cut-off events. For 836955/836955 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 45032 event pairs, 1170 based on Foata normal form. 1/6426 useless extension candidates. Maximal degree in co-relation 50247. Up to 5400 conditions per place. [2024-06-14 13:55:07,396 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 205 changer transitions 0/417 dead transitions. [2024-06-14 13:55:07,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 417 transitions, 6626 flow [2024-06-14 13:55:07,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:55:07,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:55:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-14 13:55:07,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254988913525499 [2024-06-14 13:55:07,398 INFO L175 Difference]: Start difference. First operand has 295 places, 391 transitions, 5337 flow. Second operand 11 states and 237 transitions. [2024-06-14 13:55:07,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 417 transitions, 6626 flow [2024-06-14 13:55:10,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 417 transitions, 6392 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 13:55:10,864 INFO L231 Difference]: Finished difference. Result has 296 places, 394 transitions, 5568 flow [2024-06-14 13:55:10,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5103, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5568, PETRI_PLACES=296, PETRI_TRANSITIONS=394} [2024-06-14 13:55:10,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-14 13:55:10,865 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 394 transitions, 5568 flow [2024-06-14 13:55:10,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:10,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:10,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:10,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:55:10,866 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:10,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:10,866 INFO L85 PathProgramCache]: Analyzing trace with hash -284496361, now seen corresponding path program 12 times [2024-06-14 13:55:10,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:10,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845678514] [2024-06-14 13:55:10,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:10,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:11,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:11,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845678514] [2024-06-14 13:55:11,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845678514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:11,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:11,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:55:11,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218332930] [2024-06-14 13:55:11,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:11,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:55:11,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:11,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:55:11,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:55:11,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:11,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 394 transitions, 5568 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:11,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:11,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:11,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:12,321 INFO L124 PetriNetUnfolderBase]: 3744/6438 cut-off events. [2024-06-14 13:55:12,321 INFO L125 PetriNetUnfolderBase]: For 855541/855541 co-relation queries the response was YES. [2024-06-14 13:55:12,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50889 conditions, 6438 events. 3744/6438 cut-off events. For 855541/855541 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 45088 event pairs, 1170 based on Foata normal form. 1/6435 useless extension candidates. Maximal degree in co-relation 50744. Up to 5406 conditions per place. [2024-06-14 13:55:12,401 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 208 changer transitions 0/420 dead transitions. [2024-06-14 13:55:12,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 420 transitions, 6873 flow [2024-06-14 13:55:12,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:55:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:55:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-14 13:55:12,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254988913525499 [2024-06-14 13:55:12,403 INFO L175 Difference]: Start difference. First operand has 296 places, 394 transitions, 5568 flow. Second operand 11 states and 237 transitions. [2024-06-14 13:55:12,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 420 transitions, 6873 flow [2024-06-14 13:55:16,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 420 transitions, 6445 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-14 13:55:16,599 INFO L231 Difference]: Finished difference. Result has 299 places, 397 transitions, 5617 flow [2024-06-14 13:55:16,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5159, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5617, PETRI_PLACES=299, PETRI_TRANSITIONS=397} [2024-06-14 13:55:16,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-14 13:55:16,599 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 397 transitions, 5617 flow [2024-06-14 13:55:16,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:16,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:16,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:16,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:55:16,600 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:16,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:16,600 INFO L85 PathProgramCache]: Analyzing trace with hash -208744559, now seen corresponding path program 13 times [2024-06-14 13:55:16,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:16,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421583081] [2024-06-14 13:55:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:16,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:16,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:16,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421583081] [2024-06-14 13:55:16,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421583081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:16,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:16,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:55:16,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263001638] [2024-06-14 13:55:16,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:16,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:55:16,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:16,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:55:16,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:55:16,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:16,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 397 transitions, 5617 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:16,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:16,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:16,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:17,932 INFO L124 PetriNetUnfolderBase]: 3741/6434 cut-off events. [2024-06-14 13:55:17,932 INFO L125 PetriNetUnfolderBase]: For 869544/869544 co-relation queries the response was YES. [2024-06-14 13:55:17,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50925 conditions, 6434 events. 3741/6434 cut-off events. For 869544/869544 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 45090 event pairs, 1170 based on Foata normal form. 1/6431 useless extension candidates. Maximal degree in co-relation 50779. Up to 5403 conditions per place. [2024-06-14 13:55:18,012 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 209 changer transitions 0/421 dead transitions. [2024-06-14 13:55:18,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 421 transitions, 6689 flow [2024-06-14 13:55:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:55:18,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:55:18,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 268 transitions. [2024-06-14 13:55:18,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028142589118199 [2024-06-14 13:55:18,015 INFO L175 Difference]: Start difference. First operand has 299 places, 397 transitions, 5617 flow. Second operand 13 states and 268 transitions. [2024-06-14 13:55:18,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 421 transitions, 6689 flow [2024-06-14 13:55:21,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 421 transitions, 5923 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-14 13:55:21,740 INFO L231 Difference]: Finished difference. Result has 300 places, 397 transitions, 5275 flow [2024-06-14 13:55:21,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4851, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5275, PETRI_PLACES=300, PETRI_TRANSITIONS=397} [2024-06-14 13:55:21,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-14 13:55:21,741 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 397 transitions, 5275 flow [2024-06-14 13:55:21,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:21,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:21,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:21,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:55:21,742 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:21,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:21,742 INFO L85 PathProgramCache]: Analyzing trace with hash 636865012, now seen corresponding path program 1 times [2024-06-14 13:55:21,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:21,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702262780] [2024-06-14 13:55:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:21,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:21,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:21,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702262780] [2024-06-14 13:55:21,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702262780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:21,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:21,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:21,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078103097] [2024-06-14 13:55:21,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:21,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:21,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:21,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:21,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:22,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:22,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 397 transitions, 5275 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:22,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:22,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:22,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:23,108 INFO L124 PetriNetUnfolderBase]: 3777/6499 cut-off events. [2024-06-14 13:55:23,108 INFO L125 PetriNetUnfolderBase]: For 927240/927242 co-relation queries the response was YES. [2024-06-14 13:55:23,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51020 conditions, 6499 events. 3777/6499 cut-off events. For 927240/927242 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 45635 event pairs, 1168 based on Foata normal form. 12/6509 useless extension candidates. Maximal degree in co-relation 50875. Up to 5730 conditions per place. [2024-06-14 13:55:23,189 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 339 selfloop transitions, 78 changer transitions 0/423 dead transitions. [2024-06-14 13:55:23,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 423 transitions, 6237 flow [2024-06-14 13:55:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 13:55:23,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-14 13:55:23,191 INFO L175 Difference]: Start difference. First operand has 300 places, 397 transitions, 5275 flow. Second operand 9 states and 196 transitions. [2024-06-14 13:55:23,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 423 transitions, 6237 flow [2024-06-14 13:55:28,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 423 transitions, 5811 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-14 13:55:28,219 INFO L231 Difference]: Finished difference. Result has 297 places, 399 transitions, 5065 flow [2024-06-14 13:55:28,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4849, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5065, PETRI_PLACES=297, PETRI_TRANSITIONS=399} [2024-06-14 13:55:28,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-14 13:55:28,226 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 399 transitions, 5065 flow [2024-06-14 13:55:28,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:28,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:28,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:28,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:55:28,227 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:28,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:28,227 INFO L85 PathProgramCache]: Analyzing trace with hash -761634908, now seen corresponding path program 2 times [2024-06-14 13:55:28,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:28,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436007721] [2024-06-14 13:55:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:28,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:28,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:28,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436007721] [2024-06-14 13:55:28,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436007721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:28,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:28,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:28,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490627737] [2024-06-14 13:55:28,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:28,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:28,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:28,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:28,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:28,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:28,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 399 transitions, 5065 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:28,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:28,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:28,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:29,644 INFO L124 PetriNetUnfolderBase]: 3859/6611 cut-off events. [2024-06-14 13:55:29,644 INFO L125 PetriNetUnfolderBase]: For 985441/985443 co-relation queries the response was YES. [2024-06-14 13:55:29,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52757 conditions, 6611 events. 3859/6611 cut-off events. For 985441/985443 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 46422 event pairs, 1168 based on Foata normal form. 12/6621 useless extension candidates. Maximal degree in co-relation 52611. Up to 5538 conditions per place. [2024-06-14 13:55:29,730 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 338 selfloop transitions, 87 changer transitions 0/431 dead transitions. [2024-06-14 13:55:29,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 431 transitions, 6297 flow [2024-06-14 13:55:29,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:29,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 13:55:29,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-14 13:55:29,732 INFO L175 Difference]: Start difference. First operand has 297 places, 399 transitions, 5065 flow. Second operand 9 states and 201 transitions. [2024-06-14 13:55:29,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 431 transitions, 6297 flow [2024-06-14 13:55:34,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 431 transitions, 6103 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:55:34,378 INFO L231 Difference]: Finished difference. Result has 299 places, 402 transitions, 5139 flow [2024-06-14 13:55:34,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4871, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5139, PETRI_PLACES=299, PETRI_TRANSITIONS=402} [2024-06-14 13:55:34,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-14 13:55:34,379 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 402 transitions, 5139 flow [2024-06-14 13:55:34,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:34,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:34,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:34,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:55:34,380 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:34,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:34,380 INFO L85 PathProgramCache]: Analyzing trace with hash -775932449, now seen corresponding path program 14 times [2024-06-14 13:55:34,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:34,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219504995] [2024-06-14 13:55:34,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:34,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:34,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:34,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219504995] [2024-06-14 13:55:34,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219504995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:34,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:34,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:34,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302662159] [2024-06-14 13:55:34,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:34,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:34,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:34,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:34,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:34,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:34,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 402 transitions, 5139 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:34,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:34,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:34,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:35,781 INFO L124 PetriNetUnfolderBase]: 3872/6642 cut-off events. [2024-06-14 13:55:35,781 INFO L125 PetriNetUnfolderBase]: For 968922/968922 co-relation queries the response was YES. [2024-06-14 13:55:35,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53174 conditions, 6642 events. 3872/6642 cut-off events. For 968922/968922 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46779 event pairs, 1208 based on Foata normal form. 1/6639 useless extension candidates. Maximal degree in co-relation 53027. Up to 5691 conditions per place. [2024-06-14 13:55:35,874 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 287 selfloop transitions, 139 changer transitions 0/432 dead transitions. [2024-06-14 13:55:35,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 432 transitions, 6493 flow [2024-06-14 13:55:35,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:55:35,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:55:35,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-14 13:55:35,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142276422764228 [2024-06-14 13:55:35,876 INFO L175 Difference]: Start difference. First operand has 299 places, 402 transitions, 5139 flow. Second operand 12 states and 253 transitions. [2024-06-14 13:55:35,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 432 transitions, 6493 flow [2024-06-14 13:55:40,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 432 transitions, 6349 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 13:55:40,319 INFO L231 Difference]: Finished difference. Result has 306 places, 408 transitions, 5341 flow [2024-06-14 13:55:40,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4995, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5341, PETRI_PLACES=306, PETRI_TRANSITIONS=408} [2024-06-14 13:55:40,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-14 13:55:40,319 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 408 transitions, 5341 flow [2024-06-14 13:55:40,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:40,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:40,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:40,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:55:40,320 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:40,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:40,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2133467609, now seen corresponding path program 15 times [2024-06-14 13:55:40,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:40,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337999411] [2024-06-14 13:55:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:40,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:40,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:40,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337999411] [2024-06-14 13:55:40,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337999411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:40,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:40,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:40,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196078085] [2024-06-14 13:55:40,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:40,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:40,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:40,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:40,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:40,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:40,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 408 transitions, 5341 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:40,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:40,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:40,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:41,754 INFO L124 PetriNetUnfolderBase]: 3869/6638 cut-off events. [2024-06-14 13:55:41,754 INFO L125 PetriNetUnfolderBase]: For 982536/982536 co-relation queries the response was YES. [2024-06-14 13:55:41,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53309 conditions, 6638 events. 3869/6638 cut-off events. For 982536/982536 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46729 event pairs, 1206 based on Foata normal form. 1/6635 useless extension candidates. Maximal degree in co-relation 53160. Up to 5688 conditions per place. [2024-06-14 13:55:41,836 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 285 selfloop transitions, 138 changer transitions 0/429 dead transitions. [2024-06-14 13:55:41,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 429 transitions, 6431 flow [2024-06-14 13:55:41,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:55:41,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:55:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 13:55:41,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-14 13:55:41,838 INFO L175 Difference]: Start difference. First operand has 306 places, 408 transitions, 5341 flow. Second operand 10 states and 219 transitions. [2024-06-14 13:55:41,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 429 transitions, 6431 flow [2024-06-14 13:55:45,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 429 transitions, 6197 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 13:55:45,877 INFO L231 Difference]: Finished difference. Result has 308 places, 408 transitions, 5389 flow [2024-06-14 13:55:45,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5107, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5389, PETRI_PLACES=308, PETRI_TRANSITIONS=408} [2024-06-14 13:55:45,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-14 13:55:45,878 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 408 transitions, 5389 flow [2024-06-14 13:55:45,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:45,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:45,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:45,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:55:45,878 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:45,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1797399464, now seen corresponding path program 3 times [2024-06-14 13:55:45,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:45,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158134441] [2024-06-14 13:55:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:45,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:46,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:46,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158134441] [2024-06-14 13:55:46,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158134441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:46,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:46,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:46,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240993583] [2024-06-14 13:55:46,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:46,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:46,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:46,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:46,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:46,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 408 transitions, 5389 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:46,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:46,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:46,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:47,276 INFO L124 PetriNetUnfolderBase]: 3877/6658 cut-off events. [2024-06-14 13:55:47,277 INFO L125 PetriNetUnfolderBase]: For 1009919/1009945 co-relation queries the response was YES. [2024-06-14 13:55:47,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53684 conditions, 6658 events. 3877/6658 cut-off events. For 1009919/1009945 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 46973 event pairs, 1216 based on Foata normal form. 20/6673 useless extension candidates. Maximal degree in co-relation 53534. Up to 5914 conditions per place. [2024-06-14 13:55:47,363 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 341 selfloop transitions, 80 changer transitions 0/427 dead transitions. [2024-06-14 13:55:47,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 427 transitions, 6331 flow [2024-06-14 13:55:47,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:47,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 13:55:47,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 13:55:47,365 INFO L175 Difference]: Start difference. First operand has 308 places, 408 transitions, 5389 flow. Second operand 8 states and 172 transitions. [2024-06-14 13:55:47,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 427 transitions, 6331 flow [2024-06-14 13:55:51,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 427 transitions, 6055 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 13:55:51,210 INFO L231 Difference]: Finished difference. Result has 307 places, 410 transitions, 5340 flow [2024-06-14 13:55:51,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5113, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5340, PETRI_PLACES=307, PETRI_TRANSITIONS=410} [2024-06-14 13:55:51,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-14 13:55:51,210 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 410 transitions, 5340 flow [2024-06-14 13:55:51,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:51,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:51,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:51,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:55:51,211 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:51,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:51,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1993785598, now seen corresponding path program 4 times [2024-06-14 13:55:51,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:51,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417709710] [2024-06-14 13:55:51,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:51,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:51,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:51,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417709710] [2024-06-14 13:55:51,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417709710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:51,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:51,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:51,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526441625] [2024-06-14 13:55:51,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:51,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:51,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:51,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:51,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:51,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:51,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 410 transitions, 5340 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:51,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:51,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:51,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:52,577 INFO L124 PetriNetUnfolderBase]: 3898/6687 cut-off events. [2024-06-14 13:55:52,578 INFO L125 PetriNetUnfolderBase]: For 1040497/1040523 co-relation queries the response was YES. [2024-06-14 13:55:52,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54329 conditions, 6687 events. 3898/6687 cut-off events. For 1040497/1040523 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 47133 event pairs, 1215 based on Foata normal form. 20/6702 useless extension candidates. Maximal degree in co-relation 54178. Up to 5884 conditions per place. [2024-06-14 13:55:52,668 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 345 selfloop transitions, 86 changer transitions 0/437 dead transitions. [2024-06-14 13:55:52,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 437 transitions, 6602 flow [2024-06-14 13:55:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 13:55:52,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 13:55:52,670 INFO L175 Difference]: Start difference. First operand has 307 places, 410 transitions, 5340 flow. Second operand 8 states and 177 transitions. [2024-06-14 13:55:52,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 437 transitions, 6602 flow [2024-06-14 13:55:57,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 437 transitions, 6391 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:57,438 INFO L231 Difference]: Finished difference. Result has 310 places, 415 transitions, 5454 flow [2024-06-14 13:55:57,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5129, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5454, PETRI_PLACES=310, PETRI_TRANSITIONS=415} [2024-06-14 13:55:57,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-14 13:55:57,439 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 415 transitions, 5454 flow [2024-06-14 13:55:57,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:57,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:57,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:57,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:55:57,439 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:57,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:57,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1926663070, now seen corresponding path program 5 times [2024-06-14 13:55:57,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:57,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449160575] [2024-06-14 13:55:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:57,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:57,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:57,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449160575] [2024-06-14 13:55:57,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449160575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:57,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:57,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:57,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107221064] [2024-06-14 13:55:57,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:57,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:57,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:57,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:57,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:57,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:57,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 415 transitions, 5454 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:57,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:57,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:57,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:58,873 INFO L124 PetriNetUnfolderBase]: 3906/6701 cut-off events. [2024-06-14 13:55:58,873 INFO L125 PetriNetUnfolderBase]: For 1062206/1062232 co-relation queries the response was YES. [2024-06-14 13:55:58,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54770 conditions, 6701 events. 3906/6701 cut-off events. For 1062206/1062232 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 47275 event pairs, 1219 based on Foata normal form. 20/6716 useless extension candidates. Maximal degree in co-relation 54617. Up to 5928 conditions per place. [2024-06-14 13:55:58,965 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 347 selfloop transitions, 84 changer transitions 0/437 dead transitions. [2024-06-14 13:55:58,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 437 transitions, 6665 flow [2024-06-14 13:55:58,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 13:55:58,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 13:55:58,967 INFO L175 Difference]: Start difference. First operand has 310 places, 415 transitions, 5454 flow. Second operand 8 states and 174 transitions. [2024-06-14 13:55:58,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 437 transitions, 6665 flow [2024-06-14 13:56:03,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 437 transitions, 6477 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 13:56:03,914 INFO L231 Difference]: Finished difference. Result has 315 places, 418 transitions, 5558 flow [2024-06-14 13:56:03,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5276, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5558, PETRI_PLACES=315, PETRI_TRANSITIONS=418} [2024-06-14 13:56:03,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-14 13:56:03,915 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 418 transitions, 5558 flow [2024-06-14 13:56:03,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:03,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:03,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:03,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:56:03,916 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:03,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:03,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1940947870, now seen corresponding path program 6 times [2024-06-14 13:56:03,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:03,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798582852] [2024-06-14 13:56:03,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:03,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:04,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:04,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798582852] [2024-06-14 13:56:04,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798582852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:04,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:04,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:04,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30974198] [2024-06-14 13:56:04,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:04,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:04,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:04,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:04,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:04,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:04,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 418 transitions, 5558 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:04,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:04,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:04,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:05,472 INFO L124 PetriNetUnfolderBase]: 3901/6690 cut-off events. [2024-06-14 13:56:05,472 INFO L125 PetriNetUnfolderBase]: For 1071872/1071898 co-relation queries the response was YES. [2024-06-14 13:56:05,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54859 conditions, 6690 events. 3901/6690 cut-off events. For 1071872/1071898 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 47194 event pairs, 1218 based on Foata normal form. 20/6705 useless extension candidates. Maximal degree in co-relation 54703. Up to 5950 conditions per place. [2024-06-14 13:56:05,550 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 351 selfloop transitions, 78 changer transitions 0/435 dead transitions. [2024-06-14 13:56:05,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 435 transitions, 6458 flow [2024-06-14 13:56:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 13:56:05,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 13:56:05,552 INFO L175 Difference]: Start difference. First operand has 315 places, 418 transitions, 5558 flow. Second operand 8 states and 172 transitions. [2024-06-14 13:56:05,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 435 transitions, 6458 flow [2024-06-14 13:56:09,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 435 transitions, 6195 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-14 13:56:09,856 INFO L231 Difference]: Finished difference. Result has 318 places, 418 transitions, 5456 flow [2024-06-14 13:56:09,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5295, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5456, PETRI_PLACES=318, PETRI_TRANSITIONS=418} [2024-06-14 13:56:09,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-14 13:56:09,861 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 418 transitions, 5456 flow [2024-06-14 13:56:09,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:09,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:09,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:09,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:56:09,862 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:09,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:09,862 INFO L85 PathProgramCache]: Analyzing trace with hash -806253815, now seen corresponding path program 16 times [2024-06-14 13:56:09,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:09,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420574830] [2024-06-14 13:56:09,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:09,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:10,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:10,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420574830] [2024-06-14 13:56:10,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420574830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:10,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:10,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:10,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568371230] [2024-06-14 13:56:10,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:10,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:10,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:10,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:10,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:10,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 418 transitions, 5456 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:10,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:10,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:10,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:11,354 INFO L124 PetriNetUnfolderBase]: 3914/6712 cut-off events. [2024-06-14 13:56:11,355 INFO L125 PetriNetUnfolderBase]: For 1091384/1091408 co-relation queries the response was YES. [2024-06-14 13:56:11,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55049 conditions, 6712 events. 3914/6712 cut-off events. For 1091384/1091408 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 47362 event pairs, 1241 based on Foata normal form. 17/6721 useless extension candidates. Maximal degree in co-relation 54892. Up to 5751 conditions per place. [2024-06-14 13:56:11,451 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 146 changer transitions 0/442 dead transitions. [2024-06-14 13:56:11,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 442 transitions, 6846 flow [2024-06-14 13:56:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:56:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:56:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 13:56:11,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-14 13:56:11,452 INFO L175 Difference]: Start difference. First operand has 318 places, 418 transitions, 5456 flow. Second operand 9 states and 197 transitions. [2024-06-14 13:56:11,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 442 transitions, 6846 flow [2024-06-14 13:56:16,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 442 transitions, 6679 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:56:16,863 INFO L231 Difference]: Finished difference. Result has 320 places, 424 transitions, 5655 flow [2024-06-14 13:56:16,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5289, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5655, PETRI_PLACES=320, PETRI_TRANSITIONS=424} [2024-06-14 13:56:16,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-14 13:56:16,864 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 424 transitions, 5655 flow [2024-06-14 13:56:16,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:16,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:16,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:16,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:56:16,864 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:16,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash -806259395, now seen corresponding path program 17 times [2024-06-14 13:56:16,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:16,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274084450] [2024-06-14 13:56:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:16,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:17,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:17,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274084450] [2024-06-14 13:56:17,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274084450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:17,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:17,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:17,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711785068] [2024-06-14 13:56:17,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:17,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:17,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:17,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:17,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:17,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:17,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 424 transitions, 5655 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:17,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:17,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:17,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:18,296 INFO L124 PetriNetUnfolderBase]: 3911/6708 cut-off events. [2024-06-14 13:56:18,296 INFO L125 PetriNetUnfolderBase]: For 1108055/1108079 co-relation queries the response was YES. [2024-06-14 13:56:18,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55305 conditions, 6708 events. 3911/6708 cut-off events. For 1108055/1108079 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 47287 event pairs, 1241 based on Foata normal form. 17/6717 useless extension candidates. Maximal degree in co-relation 55147. Up to 5748 conditions per place. [2024-06-14 13:56:18,389 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 147 changer transitions 0/443 dead transitions. [2024-06-14 13:56:18,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 443 transitions, 6779 flow [2024-06-14 13:56:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:56:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:56:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-14 13:56:18,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055432372505543 [2024-06-14 13:56:18,391 INFO L175 Difference]: Start difference. First operand has 320 places, 424 transitions, 5655 flow. Second operand 11 states and 228 transitions. [2024-06-14 13:56:18,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 443 transitions, 6779 flow [2024-06-14 13:56:24,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 443 transitions, 6530 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:56:24,873 INFO L231 Difference]: Finished difference. Result has 326 places, 424 transitions, 5706 flow [2024-06-14 13:56:24,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5406, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5706, PETRI_PLACES=326, PETRI_TRANSITIONS=424} [2024-06-14 13:56:24,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-14 13:56:24,873 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 424 transitions, 5706 flow [2024-06-14 13:56:24,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:24,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:24,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:24,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:56:24,874 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:24,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:24,874 INFO L85 PathProgramCache]: Analyzing trace with hash -2002369219, now seen corresponding path program 18 times [2024-06-14 13:56:24,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:24,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814737776] [2024-06-14 13:56:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:24,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:25,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:25,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814737776] [2024-06-14 13:56:25,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814737776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:25,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:25,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:25,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513198582] [2024-06-14 13:56:25,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:25,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:25,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:25,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:25,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:25,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:25,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 424 transitions, 5706 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:25,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:25,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:25,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:26,388 INFO L124 PetriNetUnfolderBase]: 3924/6730 cut-off events. [2024-06-14 13:56:26,388 INFO L125 PetriNetUnfolderBase]: For 1135273/1135297 co-relation queries the response was YES. [2024-06-14 13:56:26,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55779 conditions, 6730 events. 3924/6730 cut-off events. For 1135273/1135297 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47494 event pairs, 1241 based on Foata normal form. 17/6739 useless extension candidates. Maximal degree in co-relation 55620. Up to 5763 conditions per place. [2024-06-14 13:56:26,485 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 292 selfloop transitions, 153 changer transitions 0/451 dead transitions. [2024-06-14 13:56:26,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 451 transitions, 7146 flow [2024-06-14 13:56:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:56:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:56:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-06-14 13:56:26,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508130081300813 [2024-06-14 13:56:26,487 INFO L175 Difference]: Start difference. First operand has 326 places, 424 transitions, 5706 flow. Second operand 12 states and 250 transitions. [2024-06-14 13:56:26,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 451 transitions, 7146 flow [2024-06-14 13:56:33,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 451 transitions, 6832 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 13:56:33,151 INFO L231 Difference]: Finished difference. Result has 328 places, 430 transitions, 5790 flow [2024-06-14 13:56:33,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5404, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5790, PETRI_PLACES=328, PETRI_TRANSITIONS=430} [2024-06-14 13:56:33,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-14 13:56:33,152 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 430 transitions, 5790 flow [2024-06-14 13:56:33,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:33,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:33,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:33,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:56:33,152 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:33,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:33,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2140256821, now seen corresponding path program 19 times [2024-06-14 13:56:33,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:33,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938716477] [2024-06-14 13:56:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:33,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:33,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:33,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938716477] [2024-06-14 13:56:33,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938716477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:33,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:33,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:33,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163917648] [2024-06-14 13:56:33,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:33,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:33,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:33,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:33,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:33,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:33,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 430 transitions, 5790 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:33,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:33,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:33,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:34,840 INFO L124 PetriNetUnfolderBase]: 3921/6726 cut-off events. [2024-06-14 13:56:34,840 INFO L125 PetriNetUnfolderBase]: For 1150871/1150895 co-relation queries the response was YES. [2024-06-14 13:56:34,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55856 conditions, 6726 events. 3921/6726 cut-off events. For 1150871/1150895 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47406 event pairs, 1241 based on Foata normal form. 17/6735 useless extension candidates. Maximal degree in co-relation 55696. Up to 5760 conditions per place. [2024-06-14 13:56:34,927 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 152 changer transitions 0/448 dead transitions. [2024-06-14 13:56:34,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 448 transitions, 6926 flow [2024-06-14 13:56:34,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:56:34,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:56:34,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-14 13:56:34,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 13:56:34,929 INFO L175 Difference]: Start difference. First operand has 328 places, 430 transitions, 5790 flow. Second operand 10 states and 215 transitions. [2024-06-14 13:56:34,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 448 transitions, 6926 flow [2024-06-14 13:56:41,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 448 transitions, 6383 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-14 13:56:41,653 INFO L231 Difference]: Finished difference. Result has 327 places, 430 transitions, 5557 flow [2024-06-14 13:56:41,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5557, PETRI_PLACES=327, PETRI_TRANSITIONS=430} [2024-06-14 13:56:41,654 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-14 13:56:41,654 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 430 transitions, 5557 flow [2024-06-14 13:56:41,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:41,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:41,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:41,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:56:41,656 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:41,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:41,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2140406551, now seen corresponding path program 20 times [2024-06-14 13:56:41,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:41,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012916455] [2024-06-14 13:56:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:41,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:41,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:41,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012916455] [2024-06-14 13:56:41,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012916455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:41,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:41,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:41,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598517523] [2024-06-14 13:56:41,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:41,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:41,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:41,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:41,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:41,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:41,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 430 transitions, 5557 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:41,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:41,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:41,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:43,197 INFO L124 PetriNetUnfolderBase]: 3918/6718 cut-off events. [2024-06-14 13:56:43,198 INFO L125 PetriNetUnfolderBase]: For 1162791/1162791 co-relation queries the response was YES. [2024-06-14 13:56:43,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55728 conditions, 6718 events. 3918/6718 cut-off events. For 1162791/1162791 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47352 event pairs, 1212 based on Foata normal form. 1/6715 useless extension candidates. Maximal degree in co-relation 55567. Up to 6121 conditions per place. [2024-06-14 13:56:43,295 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 409 selfloop transitions, 27 changer transitions 0/442 dead transitions. [2024-06-14 13:56:43,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 442 transitions, 6457 flow [2024-06-14 13:56:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-14 13:56:43,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 13:56:43,297 INFO L175 Difference]: Start difference. First operand has 327 places, 430 transitions, 5557 flow. Second operand 8 states and 164 transitions. [2024-06-14 13:56:43,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 442 transitions, 6457 flow [2024-06-14 13:56:49,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 442 transitions, 6147 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 13:56:49,583 INFO L231 Difference]: Finished difference. Result has 326 places, 430 transitions, 5307 flow [2024-06-14 13:56:49,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5307, PETRI_PLACES=326, PETRI_TRANSITIONS=430} [2024-06-14 13:56:49,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-14 13:56:49,584 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 430 transitions, 5307 flow [2024-06-14 13:56:49,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:49,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:49,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:49,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:56:49,585 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:49,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:49,585 INFO L85 PathProgramCache]: Analyzing trace with hash 876902360, now seen corresponding path program 7 times [2024-06-14 13:56:49,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:49,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451333866] [2024-06-14 13:56:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:49,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:49,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:49,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451333866] [2024-06-14 13:56:49,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451333866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:49,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:49,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:49,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959450602] [2024-06-14 13:56:49,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:49,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:49,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:49,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:49,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:49,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:49,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 430 transitions, 5307 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:49,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:49,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:49,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:51,069 INFO L124 PetriNetUnfolderBase]: 3926/6734 cut-off events. [2024-06-14 13:56:51,070 INFO L125 PetriNetUnfolderBase]: For 1190089/1190115 co-relation queries the response was YES. [2024-06-14 13:56:51,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55695 conditions, 6734 events. 3926/6734 cut-off events. For 1190089/1190115 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47485 event pairs, 1136 based on Foata normal form. 20/6749 useless extension candidates. Maximal degree in co-relation 55533. Up to 5535 conditions per place. [2024-06-14 13:56:51,186 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 348 selfloop transitions, 108 changer transitions 0/462 dead transitions. [2024-06-14 13:56:51,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 462 transitions, 6895 flow [2024-06-14 13:56:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:51,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 13:56:51,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 13:56:51,188 INFO L175 Difference]: Start difference. First operand has 326 places, 430 transitions, 5307 flow. Second operand 8 states and 182 transitions. [2024-06-14 13:56:51,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 462 transitions, 6895 flow [2024-06-14 13:56:56,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 462 transitions, 6833 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:56:57,000 INFO L231 Difference]: Finished difference. Result has 328 places, 435 transitions, 5630 flow [2024-06-14 13:56:57,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5245, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5630, PETRI_PLACES=328, PETRI_TRANSITIONS=435} [2024-06-14 13:56:57,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-14 13:56:57,001 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 435 transitions, 5630 flow [2024-06-14 13:56:57,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:57,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:57,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:57,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:56:57,002 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:57,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:57,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1696974460, now seen corresponding path program 8 times [2024-06-14 13:56:57,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:57,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813471527] [2024-06-14 13:56:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:57,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:57,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:57,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813471527] [2024-06-14 13:56:57,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813471527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:57,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:57,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:57,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270262243] [2024-06-14 13:56:57,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:57,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:57,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:57,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:57,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:57,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:57,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 435 transitions, 5630 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:57,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:57,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:57,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:58,486 INFO L124 PetriNetUnfolderBase]: 3921/6731 cut-off events. [2024-06-14 13:56:58,487 INFO L125 PetriNetUnfolderBase]: For 1203130/1203156 co-relation queries the response was YES. [2024-06-14 13:56:58,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56194 conditions, 6731 events. 3921/6731 cut-off events. For 1203130/1203156 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 47538 event pairs, 1148 based on Foata normal form. 20/6746 useless extension candidates. Maximal degree in co-relation 56030. Up to 5531 conditions per place. [2024-06-14 13:56:58,583 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 346 selfloop transitions, 107 changer transitions 0/459 dead transitions. [2024-06-14 13:56:58,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 459 transitions, 6867 flow [2024-06-14 13:56:58,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 13:56:58,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 13:56:58,584 INFO L175 Difference]: Start difference. First operand has 328 places, 435 transitions, 5630 flow. Second operand 8 states and 178 transitions. [2024-06-14 13:56:58,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 459 transitions, 6867 flow [2024-06-14 13:57:03,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 459 transitions, 6518 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-14 13:57:03,281 INFO L231 Difference]: Finished difference. Result has 331 places, 436 transitions, 5541 flow [2024-06-14 13:57:03,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5309, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5541, PETRI_PLACES=331, PETRI_TRANSITIONS=436} [2024-06-14 13:57:03,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-14 13:57:03,282 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 436 transitions, 5541 flow [2024-06-14 13:57:03,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:03,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:03,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:03,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:57:03,282 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:03,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:03,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2137653608, now seen corresponding path program 1 times [2024-06-14 13:57:03,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:03,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549464209] [2024-06-14 13:57:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:03,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:03,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:03,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549464209] [2024-06-14 13:57:03,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549464209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:03,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:03,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:03,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551394028] [2024-06-14 13:57:03,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:03,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:03,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:03,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:03,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:03,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:03,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 436 transitions, 5541 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:03,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:03,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:03,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:04,973 INFO L124 PetriNetUnfolderBase]: 3908/6685 cut-off events. [2024-06-14 13:57:04,973 INFO L125 PetriNetUnfolderBase]: For 1243741/1243741 co-relation queries the response was YES. [2024-06-14 13:57:05,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54204 conditions, 6685 events. 3908/6685 cut-off events. For 1243741/1243741 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 46711 event pairs, 836 based on Foata normal form. 24/6705 useless extension candidates. Maximal degree in co-relation 54039. Up to 4361 conditions per place. [2024-06-14 13:57:05,056 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 396 selfloop transitions, 68 changer transitions 9/479 dead transitions. [2024-06-14 13:57:05,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 479 transitions, 7143 flow [2024-06-14 13:57:05,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 13:57:05,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:57:05,057 INFO L175 Difference]: Start difference. First operand has 331 places, 436 transitions, 5541 flow. Second operand 8 states and 200 transitions. [2024-06-14 13:57:05,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 479 transitions, 7143 flow [2024-06-14 13:57:10,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 479 transitions, 6962 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:57:10,762 INFO L231 Difference]: Finished difference. Result has 335 places, 435 transitions, 5498 flow [2024-06-14 13:57:10,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5360, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5498, PETRI_PLACES=335, PETRI_TRANSITIONS=435} [2024-06-14 13:57:10,763 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-14 13:57:10,763 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 435 transitions, 5498 flow [2024-06-14 13:57:10,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:10,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:10,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:10,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:57:10,764 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:10,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:10,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2109964080, now seen corresponding path program 2 times [2024-06-14 13:57:10,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:10,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507368342] [2024-06-14 13:57:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:10,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:11,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:11,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507368342] [2024-06-14 13:57:11,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507368342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:11,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:11,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:11,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449125867] [2024-06-14 13:57:11,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:11,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:11,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:11,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:11,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:11,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:11,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 435 transitions, 5498 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:11,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:11,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:11,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:12,527 INFO L124 PetriNetUnfolderBase]: 4652/7955 cut-off events. [2024-06-14 13:57:12,527 INFO L125 PetriNetUnfolderBase]: For 1860559/1860559 co-relation queries the response was YES. [2024-06-14 13:57:12,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73298 conditions, 7955 events. 4652/7955 cut-off events. For 1860559/1860559 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 57805 event pairs, 1177 based on Foata normal form. 6/7957 useless extension candidates. Maximal degree in co-relation 73131. Up to 4188 conditions per place. [2024-06-14 13:57:12,650 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 353 selfloop transitions, 117 changer transitions 7/483 dead transitions. [2024-06-14 13:57:12,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 483 transitions, 7287 flow [2024-06-14 13:57:12,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 13:57:12,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-14 13:57:12,651 INFO L175 Difference]: Start difference. First operand has 335 places, 435 transitions, 5498 flow. Second operand 8 states and 199 transitions. [2024-06-14 13:57:12,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 483 transitions, 7287 flow [2024-06-14 13:57:22,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 483 transitions, 7137 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 13:57:22,149 INFO L231 Difference]: Finished difference. Result has 337 places, 437 transitions, 5801 flow [2024-06-14 13:57:22,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5358, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5801, PETRI_PLACES=337, PETRI_TRANSITIONS=437} [2024-06-14 13:57:22,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-14 13:57:22,150 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 437 transitions, 5801 flow [2024-06-14 13:57:22,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:22,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:22,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:22,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:57:22,150 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:22,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:22,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1779983702, now seen corresponding path program 1 times [2024-06-14 13:57:22,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:22,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508611556] [2024-06-14 13:57:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:22,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:22,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:22,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508611556] [2024-06-14 13:57:22,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508611556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:22,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:22,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:57:22,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647013204] [2024-06-14 13:57:22,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:22,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:57:22,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:22,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:57:22,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:57:22,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:22,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 437 transitions, 5801 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:22,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:22,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:22,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:24,337 INFO L124 PetriNetUnfolderBase]: 5062/8695 cut-off events. [2024-06-14 13:57:24,337 INFO L125 PetriNetUnfolderBase]: For 2396182/2396182 co-relation queries the response was YES. [2024-06-14 13:57:24,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88372 conditions, 8695 events. 5062/8695 cut-off events. For 2396182/2396182 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 64618 event pairs, 1491 based on Foata normal form. 6/8697 useless extension candidates. Maximal degree in co-relation 88203. Up to 3836 conditions per place. [2024-06-14 13:57:24,454 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 354 selfloop transitions, 137 changer transitions 0/497 dead transitions. [2024-06-14 13:57:24,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 497 transitions, 7978 flow [2024-06-14 13:57:24,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:57:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:57:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-14 13:57:24,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233062330623306 [2024-06-14 13:57:24,461 INFO L175 Difference]: Start difference. First operand has 337 places, 437 transitions, 5801 flow. Second operand 9 states and 230 transitions. [2024-06-14 13:57:24,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 497 transitions, 7978 flow [2024-06-14 13:57:35,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 497 transitions, 7796 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:57:35,316 INFO L231 Difference]: Finished difference. Result has 341 places, 442 transitions, 6217 flow [2024-06-14 13:57:35,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5633, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6217, PETRI_PLACES=341, PETRI_TRANSITIONS=442} [2024-06-14 13:57:35,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-14 13:57:35,317 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 442 transitions, 6217 flow [2024-06-14 13:57:35,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:35,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:35,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:35,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:57:35,318 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:35,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:35,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1803143892, now seen corresponding path program 3 times [2024-06-14 13:57:35,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:35,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413656779] [2024-06-14 13:57:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:35,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:35,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:35,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413656779] [2024-06-14 13:57:35,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413656779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:35,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:35,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:35,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926268282] [2024-06-14 13:57:35,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:35,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:35,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:35,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:35,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:35,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:35,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 442 transitions, 6217 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:35,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:35,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:35,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:37,508 INFO L124 PetriNetUnfolderBase]: 5267/9092 cut-off events. [2024-06-14 13:57:37,508 INFO L125 PetriNetUnfolderBase]: For 2594816/2594816 co-relation queries the response was YES. [2024-06-14 13:57:37,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93602 conditions, 9092 events. 5267/9092 cut-off events. For 2594816/2594816 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 68613 event pairs, 1680 based on Foata normal form. 24/9112 useless extension candidates. Maximal degree in co-relation 93431. Up to 7826 conditions per place. [2024-06-14 13:57:37,647 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 437 selfloop transitions, 39 changer transitions 0/482 dead transitions. [2024-06-14 13:57:37,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 482 transitions, 7643 flow [2024-06-14 13:57:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:57:37,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:57:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 13:57:37,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-14 13:57:37,648 INFO L175 Difference]: Start difference. First operand has 341 places, 442 transitions, 6217 flow. Second operand 9 states and 201 transitions. [2024-06-14 13:57:37,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 482 transitions, 7643 flow [2024-06-14 13:57:49,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 482 transitions, 7382 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-14 13:57:49,815 INFO L231 Difference]: Finished difference. Result has 347 places, 446 transitions, 6180 flow [2024-06-14 13:57:49,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5974, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6180, PETRI_PLACES=347, PETRI_TRANSITIONS=446} [2024-06-14 13:57:49,816 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-14 13:57:49,816 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 446 transitions, 6180 flow [2024-06-14 13:57:49,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:49,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:49,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:49,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:57:49,817 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:49,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:49,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1219174440, now seen corresponding path program 2 times [2024-06-14 13:57:49,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:49,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276430725] [2024-06-14 13:57:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:49,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:50,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:50,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276430725] [2024-06-14 13:57:50,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276430725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:50,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:50,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:50,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485464594] [2024-06-14 13:57:50,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:50,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:50,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:50,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:50,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:50,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:50,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 446 transitions, 6180 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:50,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:50,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:50,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:51,936 INFO L124 PetriNetUnfolderBase]: 5206/8983 cut-off events. [2024-06-14 13:57:51,936 INFO L125 PetriNetUnfolderBase]: For 2509365/2509365 co-relation queries the response was YES. [2024-06-14 13:57:52,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89914 conditions, 8983 events. 5206/8983 cut-off events. For 2509365/2509365 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 67654 event pairs, 1664 based on Foata normal form. 24/9003 useless extension candidates. Maximal degree in co-relation 89741. Up to 7826 conditions per place. [2024-06-14 13:57:52,072 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 422 selfloop transitions, 34 changer transitions 19/481 dead transitions. [2024-06-14 13:57:52,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 481 transitions, 7250 flow [2024-06-14 13:57:52,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:57:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:57:52,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 13:57:52,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-14 13:57:52,074 INFO L175 Difference]: Start difference. First operand has 347 places, 446 transitions, 6180 flow. Second operand 9 states and 200 transitions. [2024-06-14 13:57:52,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 481 transitions, 7250 flow [2024-06-14 13:58:02,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 481 transitions, 7070 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-14 13:58:02,658 INFO L231 Difference]: Finished difference. Result has 351 places, 441 transitions, 6016 flow [2024-06-14 13:58:02,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6000, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6016, PETRI_PLACES=351, PETRI_TRANSITIONS=441} [2024-06-14 13:58:02,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-14 13:58:02,658 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 441 transitions, 6016 flow [2024-06-14 13:58:02,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:02,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:02,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:02,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:58:02,659 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:02,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:02,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1602732212, now seen corresponding path program 3 times [2024-06-14 13:58:02,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:02,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845604273] [2024-06-14 13:58:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:02,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:02,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:02,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845604273] [2024-06-14 13:58:02,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845604273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:02,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:02,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:02,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132607059] [2024-06-14 13:58:02,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:02,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:02,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:02,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:02,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:02,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:02,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 441 transitions, 6016 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:02,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:02,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:02,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:04,836 INFO L124 PetriNetUnfolderBase]: 5222/9007 cut-off events. [2024-06-14 13:58:04,836 INFO L125 PetriNetUnfolderBase]: For 2655703/2655703 co-relation queries the response was YES. [2024-06-14 13:58:04,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92189 conditions, 9007 events. 5222/9007 cut-off events. For 2655703/2655703 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 67767 event pairs, 1668 based on Foata normal form. 24/9027 useless extension candidates. Maximal degree in co-relation 92015. Up to 7486 conditions per place. [2024-06-14 13:58:04,988 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 439 selfloop transitions, 39 changer transitions 0/484 dead transitions. [2024-06-14 13:58:04,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 484 transitions, 7677 flow [2024-06-14 13:58:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:58:04,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:58:04,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-14 13:58:04,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-14 13:58:04,989 INFO L175 Difference]: Start difference. First operand has 351 places, 441 transitions, 6016 flow. Second operand 10 states and 221 transitions. [2024-06-14 13:58:04,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 484 transitions, 7677 flow [2024-06-14 13:58:17,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 484 transitions, 7553 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 13:58:17,200 INFO L231 Difference]: Finished difference. Result has 347 places, 442 transitions, 5992 flow [2024-06-14 13:58:17,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5902, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5992, PETRI_PLACES=347, PETRI_TRANSITIONS=442} [2024-06-14 13:58:17,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-14 13:58:17,201 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 442 transitions, 5992 flow [2024-06-14 13:58:17,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:17,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:17,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:17,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:58:17,202 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:17,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:17,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1602732026, now seen corresponding path program 4 times [2024-06-14 13:58:17,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:17,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427728075] [2024-06-14 13:58:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:17,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:17,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:17,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427728075] [2024-06-14 13:58:17,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427728075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:17,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:17,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:17,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808868217] [2024-06-14 13:58:17,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:17,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:17,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:17,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:17,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:17,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:17,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 442 transitions, 5992 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:17,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:17,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:17,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:19,438 INFO L124 PetriNetUnfolderBase]: 5209/8980 cut-off events. [2024-06-14 13:58:19,439 INFO L125 PetriNetUnfolderBase]: For 2511325/2511325 co-relation queries the response was YES. [2024-06-14 13:58:19,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89675 conditions, 8980 events. 5209/8980 cut-off events. For 2511325/2511325 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 67415 event pairs, 1668 based on Foata normal form. 24/9000 useless extension candidates. Maximal degree in co-relation 89503. Up to 7486 conditions per place. [2024-06-14 13:58:19,573 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 432 selfloop transitions, 34 changer transitions 13/485 dead transitions. [2024-06-14 13:58:19,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 485 transitions, 7673 flow [2024-06-14 13:58:19,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:58:19,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:58:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-14 13:58:19,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414634146341464 [2024-06-14 13:58:19,575 INFO L175 Difference]: Start difference. First operand has 347 places, 442 transitions, 5992 flow. Second operand 10 states and 222 transitions. [2024-06-14 13:58:19,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 485 transitions, 7673 flow [2024-06-14 13:58:31,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 485 transitions, 7543 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 13:58:31,704 INFO L231 Difference]: Finished difference. Result has 352 places, 438 transitions, 5894 flow [2024-06-14 13:58:31,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5868, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5894, PETRI_PLACES=352, PETRI_TRANSITIONS=438} [2024-06-14 13:58:31,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-14 13:58:31,705 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 438 transitions, 5894 flow [2024-06-14 13:58:31,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:31,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:31,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:31,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:58:31,706 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:31,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:31,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1602494876, now seen corresponding path program 5 times [2024-06-14 13:58:31,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:31,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714121017] [2024-06-14 13:58:31,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:31,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:31,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:31,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714121017] [2024-06-14 13:58:31,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714121017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:31,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:31,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:31,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051309735] [2024-06-14 13:58:31,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:31,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:31,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:31,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:31,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:32,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:32,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 438 transitions, 5894 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:32,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:32,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:32,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:33,780 INFO L124 PetriNetUnfolderBase]: 5162/8913 cut-off events. [2024-06-14 13:58:33,780 INFO L125 PetriNetUnfolderBase]: For 2509285/2509285 co-relation queries the response was YES. [2024-06-14 13:58:33,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90606 conditions, 8913 events. 5162/8913 cut-off events. For 2509285/2509285 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 67064 event pairs, 1621 based on Foata normal form. 6/8915 useless extension candidates. Maximal degree in co-relation 90434. Up to 7486 conditions per place. [2024-06-14 13:58:33,933 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 429 selfloop transitions, 33 changer transitions 8/476 dead transitions. [2024-06-14 13:58:33,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 476 transitions, 7512 flow [2024-06-14 13:58:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:58:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:58:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 13:58:33,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-14 13:58:33,934 INFO L175 Difference]: Start difference. First operand has 352 places, 438 transitions, 5894 flow. Second operand 9 states and 200 transitions. [2024-06-14 13:58:33,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 476 transitions, 7512 flow [2024-06-14 13:58:45,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 476 transitions, 7421 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:58:45,976 INFO L231 Difference]: Finished difference. Result has 353 places, 436 transitions, 5951 flow [2024-06-14 13:58:45,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5807, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5951, PETRI_PLACES=353, PETRI_TRANSITIONS=436} [2024-06-14 13:58:45,977 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-14 13:58:45,977 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 436 transitions, 5951 flow [2024-06-14 13:58:45,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:45,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:45,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:45,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:58:45,978 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:45,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:45,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1648035212, now seen corresponding path program 6 times [2024-06-14 13:58:45,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:45,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010523874] [2024-06-14 13:58:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:45,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:46,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:46,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010523874] [2024-06-14 13:58:46,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010523874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:46,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:46,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:46,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369645313] [2024-06-14 13:58:46,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:46,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:46,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:46,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:46,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:46,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:46,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 436 transitions, 5951 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:46,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:46,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:46,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:47,945 INFO L124 PetriNetUnfolderBase]: 4970/8586 cut-off events. [2024-06-14 13:58:47,945 INFO L125 PetriNetUnfolderBase]: For 2481915/2481915 co-relation queries the response was YES. [2024-06-14 13:58:48,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82847 conditions, 8586 events. 4970/8586 cut-off events. For 2481915/2481915 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 64261 event pairs, 1563 based on Foata normal form. 60/8642 useless extension candidates. Maximal degree in co-relation 82673. Up to 5454 conditions per place. [2024-06-14 13:58:48,078 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 356 selfloop transitions, 107 changer transitions 3/472 dead transitions. [2024-06-14 13:58:48,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 472 transitions, 7305 flow [2024-06-14 13:58:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:58:48,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:58:48,079 INFO L175 Difference]: Start difference. First operand has 353 places, 436 transitions, 5951 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:58:48,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 472 transitions, 7305 flow [2024-06-14 13:58:59,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 472 transitions, 7170 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-14 13:58:59,376 INFO L231 Difference]: Finished difference. Result has 345 places, 433 transitions, 5997 flow [2024-06-14 13:58:59,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5822, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5997, PETRI_PLACES=345, PETRI_TRANSITIONS=433} [2024-06-14 13:58:59,377 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-14 13:58:59,377 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 433 transitions, 5997 flow [2024-06-14 13:58:59,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:59,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:59,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:59,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:58:59,378 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:59,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:59,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2113945410, now seen corresponding path program 7 times [2024-06-14 13:58:59,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:59,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802164568] [2024-06-14 13:58:59,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:59,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:59,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:59,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802164568] [2024-06-14 13:58:59,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802164568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:59,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:59,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:59,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034615534] [2024-06-14 13:58:59,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:59,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:59,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:59,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:59,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:59,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:59,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 433 transitions, 5997 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:59,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:59,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:59,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:01,346 INFO L124 PetriNetUnfolderBase]: 4884/8454 cut-off events. [2024-06-14 13:59:01,346 INFO L125 PetriNetUnfolderBase]: For 2240867/2240867 co-relation queries the response was YES. [2024-06-14 13:59:01,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77668 conditions, 8454 events. 4884/8454 cut-off events. For 2240867/2240867 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 63325 event pairs, 1832 based on Foata normal form. 68/8514 useless extension candidates. Maximal degree in co-relation 77497. Up to 7076 conditions per place. [2024-06-14 13:59:01,482 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 362 selfloop transitions, 83 changer transitions 8/459 dead transitions. [2024-06-14 13:59:01,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 459 transitions, 7049 flow [2024-06-14 13:59:01,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:59:01,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 13:59:01,484 INFO L175 Difference]: Start difference. First operand has 345 places, 433 transitions, 5997 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:59:01,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 459 transitions, 7049 flow [2024-06-14 13:59:11,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 459 transitions, 6815 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 13:59:11,361 INFO L231 Difference]: Finished difference. Result has 345 places, 427 transitions, 5844 flow [2024-06-14 13:59:11,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5763, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5844, PETRI_PLACES=345, PETRI_TRANSITIONS=427} [2024-06-14 13:59:11,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-14 13:59:11,362 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 427 transitions, 5844 flow [2024-06-14 13:59:11,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:11,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:11,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:11,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:59:11,362 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:11,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:11,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1853543626, now seen corresponding path program 4 times [2024-06-14 13:59:11,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:11,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021105874] [2024-06-14 13:59:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:11,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:11,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:11,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021105874] [2024-06-14 13:59:11,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021105874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:11,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:11,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:59:11,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140239954] [2024-06-14 13:59:11,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:11,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:59:11,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:11,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:59:11,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:59:11,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:11,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 427 transitions, 5844 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:11,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:11,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:11,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:13,320 INFO L124 PetriNetUnfolderBase]: 4746/8241 cut-off events. [2024-06-14 13:59:13,320 INFO L125 PetriNetUnfolderBase]: For 1929509/1929509 co-relation queries the response was YES. [2024-06-14 13:59:13,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77973 conditions, 8241 events. 4746/8241 cut-off events. For 1929509/1929509 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 61666 event pairs, 1555 based on Foata normal form. 8/8230 useless extension candidates. Maximal degree in co-relation 77802. Up to 6760 conditions per place. [2024-06-14 13:59:13,447 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 346 selfloop transitions, 110 changer transitions 0/462 dead transitions. [2024-06-14 13:59:13,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 462 transitions, 7240 flow [2024-06-14 13:59:13,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:59:13,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:59:13,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-14 13:59:13,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-14 13:59:13,449 INFO L175 Difference]: Start difference. First operand has 345 places, 427 transitions, 5844 flow. Second operand 9 states and 212 transitions. [2024-06-14 13:59:13,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 462 transitions, 7240 flow [2024-06-14 13:59:22,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 462 transitions, 7035 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:59:22,846 INFO L231 Difference]: Finished difference. Result has 347 places, 429 transitions, 6006 flow [2024-06-14 13:59:22,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5639, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6006, PETRI_PLACES=347, PETRI_TRANSITIONS=429} [2024-06-14 13:59:22,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-14 13:59:22,846 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 429 transitions, 6006 flow [2024-06-14 13:59:22,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:22,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:22,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:22,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:59:22,847 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:22,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:22,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1878006984, now seen corresponding path program 5 times [2024-06-14 13:59:22,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:22,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983115996] [2024-06-14 13:59:22,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:22,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:23,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:23,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983115996] [2024-06-14 13:59:23,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983115996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:23,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:23,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:59:23,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700611153] [2024-06-14 13:59:23,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:23,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:59:23,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:23,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:59:23,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:59:23,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:23,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 429 transitions, 6006 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:23,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:23,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:23,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:24,717 INFO L124 PetriNetUnfolderBase]: 4728/8226 cut-off events. [2024-06-14 13:59:24,717 INFO L125 PetriNetUnfolderBase]: For 1910306/1910306 co-relation queries the response was YES. [2024-06-14 13:59:24,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77032 conditions, 8226 events. 4728/8226 cut-off events. For 1910306/1910306 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 61660 event pairs, 1811 based on Foata normal form. 8/8226 useless extension candidates. Maximal degree in co-relation 76860. Up to 7287 conditions per place. [2024-06-14 13:59:24,839 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 348 selfloop transitions, 98 changer transitions 0/452 dead transitions. [2024-06-14 13:59:24,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 452 transitions, 6974 flow [2024-06-14 13:59:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:59:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:59:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-14 13:59:24,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-14 13:59:24,841 INFO L175 Difference]: Start difference. First operand has 347 places, 429 transitions, 6006 flow. Second operand 9 states and 203 transitions. [2024-06-14 13:59:24,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 452 transitions, 6974 flow [2024-06-14 13:59:35,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 452 transitions, 6791 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 13:59:35,458 INFO L231 Difference]: Finished difference. Result has 350 places, 429 transitions, 6029 flow [2024-06-14 13:59:35,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5823, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6029, PETRI_PLACES=350, PETRI_TRANSITIONS=429} [2024-06-14 13:59:35,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-14 13:59:35,459 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 429 transitions, 6029 flow [2024-06-14 13:59:35,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:35,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:35,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:35,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:59:35,460 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:35,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:35,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1727333034, now seen corresponding path program 6 times [2024-06-14 13:59:35,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:35,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134839759] [2024-06-14 13:59:35,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:35,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:35,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:35,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134839759] [2024-06-14 13:59:35,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134839759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:35,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:35,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:59:35,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520389888] [2024-06-14 13:59:35,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:35,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:59:35,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:59:35,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:59:35,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:35,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 429 transitions, 6029 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:35,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:35,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:35,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:37,405 INFO L124 PetriNetUnfolderBase]: 4715/8195 cut-off events. [2024-06-14 13:59:37,405 INFO L125 PetriNetUnfolderBase]: For 1881970/1881970 co-relation queries the response was YES. [2024-06-14 13:59:37,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75970 conditions, 8195 events. 4715/8195 cut-off events. For 1881970/1881970 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 61199 event pairs, 1362 based on Foata normal form. 6/8197 useless extension candidates. Maximal degree in co-relation 75797. Up to 4531 conditions per place. [2024-06-14 13:59:37,526 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 337 selfloop transitions, 130 changer transitions 0/473 dead transitions. [2024-06-14 13:59:37,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 473 transitions, 7665 flow [2024-06-14 13:59:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:59:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:59:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-14 13:59:37,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-14 13:59:37,528 INFO L175 Difference]: Start difference. First operand has 350 places, 429 transitions, 6029 flow. Second operand 9 states and 219 transitions. [2024-06-14 13:59:37,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 473 transitions, 7665 flow [2024-06-14 13:59:46,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 473 transitions, 7420 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-14 13:59:46,061 INFO L231 Difference]: Finished difference. Result has 352 places, 431 transitions, 6224 flow [2024-06-14 13:59:46,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5788, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6224, PETRI_PLACES=352, PETRI_TRANSITIONS=431} [2024-06-14 13:59:46,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-14 13:59:46,061 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 431 transitions, 6224 flow [2024-06-14 13:59:46,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:46,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:46,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:46,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:59:46,062 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:46,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:46,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1727453190, now seen corresponding path program 8 times [2024-06-14 13:59:46,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:46,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740168318] [2024-06-14 13:59:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:46,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:46,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:46,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740168318] [2024-06-14 13:59:46,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740168318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:46,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:46,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:46,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447145712] [2024-06-14 13:59:46,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:46,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:46,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:46,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:46,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:46,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:46,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 431 transitions, 6224 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:46,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:46,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:46,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:47,939 INFO L124 PetriNetUnfolderBase]: 4684/8167 cut-off events. [2024-06-14 13:59:47,940 INFO L125 PetriNetUnfolderBase]: For 1823580/1823580 co-relation queries the response was YES. [2024-06-14 13:59:48,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73802 conditions, 8167 events. 4684/8167 cut-off events. For 1823580/1823580 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 61332 event pairs, 1623 based on Foata normal form. 24/8174 useless extension candidates. Maximal degree in co-relation 73628. Up to 7040 conditions per place. [2024-06-14 13:59:48,060 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 425 selfloop transitions, 31 changer transitions 0/462 dead transitions. [2024-06-14 13:59:48,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 462 transitions, 7466 flow [2024-06-14 13:59:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:48,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 13:59:48,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 13:59:48,061 INFO L175 Difference]: Start difference. First operand has 352 places, 431 transitions, 6224 flow. Second operand 8 states and 179 transitions. [2024-06-14 13:59:48,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 462 transitions, 7466 flow [2024-06-14 13:59:58,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 462 transitions, 7213 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 13:59:58,804 INFO L231 Difference]: Finished difference. Result has 355 places, 431 transitions, 6038 flow [2024-06-14 13:59:58,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5971, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6038, PETRI_PLACES=355, PETRI_TRANSITIONS=431} [2024-06-14 13:59:58,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-14 13:59:58,805 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 431 transitions, 6038 flow [2024-06-14 13:59:58,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:58,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:58,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:58,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:59:58,806 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:58,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:58,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1682798218, now seen corresponding path program 7 times [2024-06-14 13:59:58,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:58,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715192180] [2024-06-14 13:59:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:58,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:59,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:59,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715192180] [2024-06-14 13:59:59,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715192180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:59,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:59,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:59,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731911330] [2024-06-14 13:59:59,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:59,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:59,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:59,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:59,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:59,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:59,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 431 transitions, 6038 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:59,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:59,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:59,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:00,672 INFO L124 PetriNetUnfolderBase]: 4623/8058 cut-off events. [2024-06-14 14:00:00,672 INFO L125 PetriNetUnfolderBase]: For 1728785/1728785 co-relation queries the response was YES. [2024-06-14 14:00:00,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69929 conditions, 8058 events. 4623/8058 cut-off events. For 1728785/1728785 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 60394 event pairs, 1607 based on Foata normal form. 24/8065 useless extension candidates. Maximal degree in co-relation 69754. Up to 7040 conditions per place. [2024-06-14 14:00:00,794 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 410 selfloop transitions, 26 changer transitions 19/461 dead transitions. [2024-06-14 14:00:00,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 461 transitions, 7056 flow [2024-06-14 14:00:00,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:00,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 14:00:00,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 14:00:00,795 INFO L175 Difference]: Start difference. First operand has 355 places, 431 transitions, 6038 flow. Second operand 8 states and 178 transitions. [2024-06-14 14:00:00,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 461 transitions, 7056 flow [2024-06-14 14:00:09,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 461 transitions, 6876 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-14 14:00:09,584 INFO L231 Difference]: Finished difference. Result has 354 places, 426 transitions, 5856 flow [2024-06-14 14:00:09,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5858, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5856, PETRI_PLACES=354, PETRI_TRANSITIONS=426} [2024-06-14 14:00:09,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-14 14:00:09,584 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 426 transitions, 5856 flow [2024-06-14 14:00:09,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:09,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:09,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:09,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 14:00:09,585 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:09,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:09,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1950140628, now seen corresponding path program 8 times [2024-06-14 14:00:09,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:09,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214698030] [2024-06-14 14:00:09,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:09,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:09,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:09,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214698030] [2024-06-14 14:00:09,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214698030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:09,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:09,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:09,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127076586] [2024-06-14 14:00:09,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:09,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:09,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:09,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:09,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:09,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:09,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 426 transitions, 5856 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:09,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:09,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:09,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:11,458 INFO L124 PetriNetUnfolderBase]: 4399/7657 cut-off events. [2024-06-14 14:00:11,458 INFO L125 PetriNetUnfolderBase]: For 1600993/1600993 co-relation queries the response was YES. [2024-06-14 14:00:11,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64096 conditions, 7657 events. 4399/7657 cut-off events. For 1600993/1600993 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 56711 event pairs, 1552 based on Foata normal form. 34/7679 useless extension candidates. Maximal degree in co-relation 63921. Up to 6738 conditions per place. [2024-06-14 14:00:11,568 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 387 selfloop transitions, 44 changer transitions 11/448 dead transitions. [2024-06-14 14:00:11,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 448 transitions, 6840 flow [2024-06-14 14:00:11,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 14:00:11,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 14:00:11,569 INFO L175 Difference]: Start difference. First operand has 354 places, 426 transitions, 5856 flow. Second operand 8 states and 182 transitions. [2024-06-14 14:00:11,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 448 transitions, 6840 flow [2024-06-14 14:00:18,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 448 transitions, 6754 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 14:00:18,371 INFO L231 Difference]: Finished difference. Result has 348 places, 421 transitions, 5772 flow [2024-06-14 14:00:18,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5770, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5772, PETRI_PLACES=348, PETRI_TRANSITIONS=421} [2024-06-14 14:00:18,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-14 14:00:18,372 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 421 transitions, 5772 flow [2024-06-14 14:00:18,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:18,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:18,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:18,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 14:00:18,373 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:18,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:18,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1993150284, now seen corresponding path program 9 times [2024-06-14 14:00:18,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:18,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401911487] [2024-06-14 14:00:18,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:18,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:18,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:18,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401911487] [2024-06-14 14:00:18,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401911487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:18,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:18,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:18,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785574140] [2024-06-14 14:00:18,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:18,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:18,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:18,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:18,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:18,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:18,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 421 transitions, 5772 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:18,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:18,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:18,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:20,093 INFO L124 PetriNetUnfolderBase]: 4189/7307 cut-off events. [2024-06-14 14:00:20,093 INFO L125 PetriNetUnfolderBase]: For 1355886/1355886 co-relation queries the response was YES. [2024-06-14 14:00:20,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58623 conditions, 7307 events. 4189/7307 cut-off events. For 1355886/1355886 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 53671 event pairs, 1380 based on Foata normal form. 30/7333 useless extension candidates. Maximal degree in co-relation 58451. Up to 6064 conditions per place. [2024-06-14 14:00:20,192 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 384 selfloop transitions, 43 changer transitions 16/449 dead transitions. [2024-06-14 14:00:20,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 449 transitions, 6792 flow [2024-06-14 14:00:20,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:20,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 14:00:20,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 14:00:20,193 INFO L175 Difference]: Start difference. First operand has 348 places, 421 transitions, 5772 flow. Second operand 8 states and 186 transitions. [2024-06-14 14:00:20,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 449 transitions, 6792 flow [2024-06-14 14:00:26,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 449 transitions, 6562 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 14:00:26,379 INFO L231 Difference]: Finished difference. Result has 346 places, 411 transitions, 5432 flow [2024-06-14 14:00:26,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5543, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5432, PETRI_PLACES=346, PETRI_TRANSITIONS=411} [2024-06-14 14:00:26,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 14:00:26,380 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 411 transitions, 5432 flow [2024-06-14 14:00:26,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:26,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:26,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:26,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 14:00:26,381 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:26,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:26,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1089730148, now seen corresponding path program 9 times [2024-06-14 14:00:26,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:26,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499307790] [2024-06-14 14:00:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:26,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:26,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:26,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499307790] [2024-06-14 14:00:26,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499307790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:26,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:26,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:26,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198299514] [2024-06-14 14:00:26,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:26,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:26,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:26,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:26,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:26,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:26,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 411 transitions, 5432 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:26,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:26,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:26,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:28,061 INFO L124 PetriNetUnfolderBase]: 3937/6812 cut-off events. [2024-06-14 14:00:28,061 INFO L125 PetriNetUnfolderBase]: For 1143287/1143287 co-relation queries the response was YES. [2024-06-14 14:00:28,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55074 conditions, 6812 events. 3937/6812 cut-off events. For 1143287/1143287 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 48965 event pairs, 1125 based on Foata normal form. 8/6811 useless extension candidates. Maximal degree in co-relation 54902. Up to 5714 conditions per place. [2024-06-14 14:00:28,146 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 348 selfloop transitions, 79 changer transitions 7/440 dead transitions. [2024-06-14 14:00:28,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 440 transitions, 6640 flow [2024-06-14 14:00:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 14:00:28,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 14:00:28,148 INFO L175 Difference]: Start difference. First operand has 346 places, 411 transitions, 5432 flow. Second operand 8 states and 189 transitions. [2024-06-14 14:00:28,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 440 transitions, 6640 flow [2024-06-14 14:00:33,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 440 transitions, 6450 flow, removed 10 selfloop flow, removed 15 redundant places. [2024-06-14 14:00:33,330 INFO L231 Difference]: Finished difference. Result has 339 places, 407 transitions, 5340 flow [2024-06-14 14:00:33,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5246, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5340, PETRI_PLACES=339, PETRI_TRANSITIONS=407} [2024-06-14 14:00:33,331 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-14 14:00:33,331 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 407 transitions, 5340 flow [2024-06-14 14:00:33,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:33,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:33,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:33,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 14:00:33,332 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:33,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:33,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1953120736, now seen corresponding path program 10 times [2024-06-14 14:00:33,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:33,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542111074] [2024-06-14 14:00:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:33,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:33,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:33,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542111074] [2024-06-14 14:00:33,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542111074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:33,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:33,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:33,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31940209] [2024-06-14 14:00:33,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:33,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:33,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:33,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:33,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:33,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:33,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 407 transitions, 5340 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:33,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:33,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:33,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:34,847 INFO L124 PetriNetUnfolderBase]: 3769/6523 cut-off events. [2024-06-14 14:00:34,848 INFO L125 PetriNetUnfolderBase]: For 1071550/1071550 co-relation queries the response was YES. [2024-06-14 14:00:34,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52413 conditions, 6523 events. 3769/6523 cut-off events. For 1071550/1071550 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 46463 event pairs, 1196 based on Foata normal form. 8/6525 useless extension candidates. Maximal degree in co-relation 52244. Up to 5752 conditions per place. [2024-06-14 14:00:34,943 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 353 selfloop transitions, 62 changer transitions 8/429 dead transitions. [2024-06-14 14:00:34,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 429 transitions, 6260 flow [2024-06-14 14:00:34,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:34,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 14:00:34,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-14 14:00:34,944 INFO L175 Difference]: Start difference. First operand has 339 places, 407 transitions, 5340 flow. Second operand 8 states and 181 transitions. [2024-06-14 14:00:34,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 429 transitions, 6260 flow [2024-06-14 14:00:41,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 429 transitions, 6021 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 14:00:41,396 INFO L231 Difference]: Finished difference. Result has 337 places, 402 transitions, 5137 flow [2024-06-14 14:00:41,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5101, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5137, PETRI_PLACES=337, PETRI_TRANSITIONS=402} [2024-06-14 14:00:41,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-14 14:00:41,397 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 402 transitions, 5137 flow [2024-06-14 14:00:41,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:41,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:41,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:41,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 14:00:41,398 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:41,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:41,412 INFO L85 PathProgramCache]: Analyzing trace with hash -452282320, now seen corresponding path program 10 times [2024-06-14 14:00:41,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:41,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733607091] [2024-06-14 14:00:41,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:41,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:41,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:41,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733607091] [2024-06-14 14:00:41,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733607091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:41,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:41,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:00:41,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804153976] [2024-06-14 14:00:41,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:41,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:00:41,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:41,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:00:41,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:00:41,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:41,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 402 transitions, 5137 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:41,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:41,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:41,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:42,957 INFO L124 PetriNetUnfolderBase]: 3741/6447 cut-off events. [2024-06-14 14:00:42,958 INFO L125 PetriNetUnfolderBase]: For 1136583/1136583 co-relation queries the response was YES. [2024-06-14 14:00:43,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53686 conditions, 6447 events. 3741/6447 cut-off events. For 1136583/1136583 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 45498 event pairs, 1154 based on Foata normal form. 8/6445 useless extension candidates. Maximal degree in co-relation 53518. Up to 5380 conditions per place. [2024-06-14 14:00:43,050 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 111 changer transitions 0/439 dead transitions. [2024-06-14 14:00:43,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 439 transitions, 6487 flow [2024-06-14 14:00:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:00:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:00:43,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 14:00:43,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 14:00:43,052 INFO L175 Difference]: Start difference. First operand has 337 places, 402 transitions, 5137 flow. Second operand 10 states and 225 transitions. [2024-06-14 14:00:43,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 439 transitions, 6487 flow [2024-06-14 14:00:49,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 439 transitions, 6259 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-14 14:00:49,142 INFO L231 Difference]: Finished difference. Result has 335 places, 404 transitions, 5279 flow [2024-06-14 14:00:49,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4911, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5279, PETRI_PLACES=335, PETRI_TRANSITIONS=404} [2024-06-14 14:00:49,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-14 14:00:49,143 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 404 transitions, 5279 flow [2024-06-14 14:00:49,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:49,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:49,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:49,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 14:00:49,144 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:49,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:49,144 INFO L85 PathProgramCache]: Analyzing trace with hash -995456802, now seen corresponding path program 11 times [2024-06-14 14:00:49,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:49,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392285568] [2024-06-14 14:00:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:49,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:49,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:49,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392285568] [2024-06-14 14:00:49,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392285568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:49,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:49,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:00:49,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151095904] [2024-06-14 14:00:49,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:49,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:00:49,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:49,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:00:49,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:00:49,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:49,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 404 transitions, 5279 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:49,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:49,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:49,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:50,555 INFO L124 PetriNetUnfolderBase]: 3769/6505 cut-off events. [2024-06-14 14:00:50,556 INFO L125 PetriNetUnfolderBase]: For 1141866/1141866 co-relation queries the response was YES. [2024-06-14 14:00:50,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54401 conditions, 6505 events. 3769/6505 cut-off events. For 1141866/1141866 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 46090 event pairs, 1188 based on Foata normal form. 8/6509 useless extension candidates. Maximal degree in co-relation 54234. Up to 5614 conditions per place. [2024-06-14 14:00:50,646 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 317 selfloop transitions, 109 changer transitions 0/432 dead transitions. [2024-06-14 14:00:50,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 432 transitions, 6289 flow [2024-06-14 14:00:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:00:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:00:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-14 14:00:50,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-14 14:00:50,647 INFO L175 Difference]: Start difference. First operand has 335 places, 404 transitions, 5279 flow. Second operand 10 states and 218 transitions. [2024-06-14 14:00:50,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 432 transitions, 6289 flow [2024-06-14 14:00:55,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 432 transitions, 6072 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 14:00:55,804 INFO L231 Difference]: Finished difference. Result has 339 places, 405 transitions, 5359 flow [2024-06-14 14:00:55,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5072, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5359, PETRI_PLACES=339, PETRI_TRANSITIONS=405} [2024-06-14 14:00:55,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-14 14:00:55,805 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 405 transitions, 5359 flow [2024-06-14 14:00:55,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:55,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:55,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:55,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 14:00:55,805 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:55,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:55,806 INFO L85 PathProgramCache]: Analyzing trace with hash -708569472, now seen corresponding path program 12 times [2024-06-14 14:00:55,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:55,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884970634] [2024-06-14 14:00:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:55,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:56,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:56,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884970634] [2024-06-14 14:00:56,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884970634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:56,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:56,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:00:56,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506472512] [2024-06-14 14:00:56,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:56,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:00:56,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:56,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:00:56,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:00:56,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:56,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 405 transitions, 5359 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:56,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:56,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:56,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:57,396 INFO L124 PetriNetUnfolderBase]: 3751/6479 cut-off events. [2024-06-14 14:00:57,396 INFO L125 PetriNetUnfolderBase]: For 1104560/1104560 co-relation queries the response was YES. [2024-06-14 14:00:57,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53043 conditions, 6479 events. 3751/6479 cut-off events. For 1104560/1104560 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 45952 event pairs, 1180 based on Foata normal form. 8/6483 useless extension candidates. Maximal degree in co-relation 52874. Up to 5588 conditions per place. [2024-06-14 14:00:57,481 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 314 selfloop transitions, 109 changer transitions 0/429 dead transitions. [2024-06-14 14:00:57,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 429 transitions, 6283 flow [2024-06-14 14:00:57,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:00:57,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:00:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-14 14:00:57,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-14 14:00:57,483 INFO L175 Difference]: Start difference. First operand has 339 places, 405 transitions, 5359 flow. Second operand 10 states and 216 transitions. [2024-06-14 14:00:57,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 429 transitions, 6283 flow [2024-06-14 14:01:04,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 429 transitions, 5980 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-14 14:01:04,391 INFO L231 Difference]: Finished difference. Result has 341 places, 405 transitions, 5279 flow [2024-06-14 14:01:04,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5056, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5279, PETRI_PLACES=341, PETRI_TRANSITIONS=405} [2024-06-14 14:01:04,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-14 14:01:04,392 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 405 transitions, 5279 flow [2024-06-14 14:01:04,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:04,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:04,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:04,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 14:01:04,393 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:04,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:04,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1652340288, now seen corresponding path program 11 times [2024-06-14 14:01:04,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:04,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533700656] [2024-06-14 14:01:04,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:04,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:04,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:04,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533700656] [2024-06-14 14:01:04,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533700656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:04,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:04,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:04,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983897495] [2024-06-14 14:01:04,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:04,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:04,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:04,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:04,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:04,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:04,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 405 transitions, 5279 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:04,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:04,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:04,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:05,943 INFO L124 PetriNetUnfolderBase]: 3839/6610 cut-off events. [2024-06-14 14:01:05,943 INFO L125 PetriNetUnfolderBase]: For 1249319/1249319 co-relation queries the response was YES. [2024-06-14 14:01:06,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53089 conditions, 6610 events. 3839/6610 cut-off events. For 1249319/1249319 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 46871 event pairs, 1142 based on Foata normal form. 30/6636 useless extension candidates. Maximal degree in co-relation 52919. Up to 4795 conditions per place. [2024-06-14 14:01:06,038 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 351 selfloop transitions, 80 changer transitions 12/449 dead transitions. [2024-06-14 14:01:06,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 449 transitions, 6575 flow [2024-06-14 14:01:06,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:01:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:01:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-14 14:01:06,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2024-06-14 14:01:06,039 INFO L175 Difference]: Start difference. First operand has 341 places, 405 transitions, 5279 flow. Second operand 10 states and 234 transitions. [2024-06-14 14:01:06,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 449 transitions, 6575 flow [2024-06-14 14:01:12,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 449 transitions, 6344 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 14:01:12,702 INFO L231 Difference]: Finished difference. Result has 343 places, 402 transitions, 5190 flow [2024-06-14 14:01:12,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5048, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5190, PETRI_PLACES=343, PETRI_TRANSITIONS=402} [2024-06-14 14:01:12,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-14 14:01:12,702 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 402 transitions, 5190 flow [2024-06-14 14:01:12,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:12,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:12,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:12,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 14:01:12,703 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:12,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:12,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1652349588, now seen corresponding path program 12 times [2024-06-14 14:01:12,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:12,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974723802] [2024-06-14 14:01:12,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:12,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:12,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:12,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974723802] [2024-06-14 14:01:12,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974723802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:12,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:12,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:12,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814490934] [2024-06-14 14:01:12,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:12,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:12,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:12,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:12,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:12,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:12,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 402 transitions, 5190 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:12,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:12,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:12,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:14,196 INFO L124 PetriNetUnfolderBase]: 3807/6571 cut-off events. [2024-06-14 14:01:14,196 INFO L125 PetriNetUnfolderBase]: For 1299328/1299328 co-relation queries the response was YES. [2024-06-14 14:01:14,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52988 conditions, 6571 events. 3807/6571 cut-off events. For 1299328/1299328 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 46836 event pairs, 1194 based on Foata normal form. 34/6599 useless extension candidates. Maximal degree in co-relation 52816. Up to 5627 conditions per place. [2024-06-14 14:01:14,291 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 341 selfloop transitions, 68 changer transitions 20/435 dead transitions. [2024-06-14 14:01:14,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 435 transitions, 6170 flow [2024-06-14 14:01:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:01:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:01:14,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-14 14:01:14,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-14 14:01:14,293 INFO L175 Difference]: Start difference. First operand has 343 places, 402 transitions, 5190 flow. Second operand 10 states and 224 transitions. [2024-06-14 14:01:14,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 435 transitions, 6170 flow [2024-06-14 14:01:20,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 435 transitions, 6004 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 14:01:20,653 INFO L231 Difference]: Finished difference. Result has 343 places, 391 transitions, 4974 flow [2024-06-14 14:01:20,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5026, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4974, PETRI_PLACES=343, PETRI_TRANSITIONS=391} [2024-06-14 14:01:20,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-14 14:01:20,654 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 391 transitions, 4974 flow [2024-06-14 14:01:20,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:20,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:20,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:20,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 14:01:20,654 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:20,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:20,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1310562204, now seen corresponding path program 13 times [2024-06-14 14:01:20,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:20,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388832844] [2024-06-14 14:01:20,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:20,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:20,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:20,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388832844] [2024-06-14 14:01:20,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388832844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:20,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:20,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:01:20,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047017894] [2024-06-14 14:01:20,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:20,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:01:20,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:20,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:01:20,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:01:20,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:20,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 391 transitions, 4974 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:20,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:20,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:20,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:22,432 INFO L124 PetriNetUnfolderBase]: 3753/6493 cut-off events. [2024-06-14 14:01:22,433 INFO L125 PetriNetUnfolderBase]: For 1200024/1200024 co-relation queries the response was YES. [2024-06-14 14:01:22,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54512 conditions, 6493 events. 3753/6493 cut-off events. For 1200024/1200024 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 46273 event pairs, 1178 based on Foata normal form. 8/6497 useless extension candidates. Maximal degree in co-relation 54340. Up to 5458 conditions per place. [2024-06-14 14:01:22,525 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 327 selfloop transitions, 102 changer transitions 0/435 dead transitions. [2024-06-14 14:01:22,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 435 transitions, 6344 flow [2024-06-14 14:01:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:01:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:01:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-14 14:01:22,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549889135254989 [2024-06-14 14:01:22,527 INFO L175 Difference]: Start difference. First operand has 343 places, 391 transitions, 4974 flow. Second operand 11 states and 248 transitions. [2024-06-14 14:01:22,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 435 transitions, 6344 flow [2024-06-14 14:01:29,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 435 transitions, 6160 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-14 14:01:29,237 INFO L231 Difference]: Finished difference. Result has 340 places, 393 transitions, 5148 flow [2024-06-14 14:01:29,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4794, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5148, PETRI_PLACES=340, PETRI_TRANSITIONS=393} [2024-06-14 14:01:29,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-14 14:01:29,241 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 393 transitions, 5148 flow [2024-06-14 14:01:29,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:29,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:29,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:29,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 14:01:29,242 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:29,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:29,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1191168804, now seen corresponding path program 14 times [2024-06-14 14:01:29,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:29,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873712777] [2024-06-14 14:01:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:29,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:29,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:29,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873712777] [2024-06-14 14:01:29,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873712777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:29,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:29,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:01:29,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663656660] [2024-06-14 14:01:29,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:29,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:01:29,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:29,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:01:29,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:01:29,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:29,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 393 transitions, 5148 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:29,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:29,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:29,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:30,803 INFO L124 PetriNetUnfolderBase]: 3735/6467 cut-off events. [2024-06-14 14:01:30,803 INFO L125 PetriNetUnfolderBase]: For 1133142/1133142 co-relation queries the response was YES. [2024-06-14 14:01:30,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53062 conditions, 6467 events. 3735/6467 cut-off events. For 1133142/1133142 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 46078 event pairs, 1186 based on Foata normal form. 8/6471 useless extension candidates. Maximal degree in co-relation 52893. Up to 5618 conditions per place. [2024-06-14 14:01:30,897 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 101 changer transitions 0/427 dead transitions. [2024-06-14 14:01:30,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 427 transitions, 6094 flow [2024-06-14 14:01:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:01:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:01:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-14 14:01:30,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532150776053215 [2024-06-14 14:01:30,899 INFO L175 Difference]: Start difference. First operand has 340 places, 393 transitions, 5148 flow. Second operand 11 states and 240 transitions. [2024-06-14 14:01:30,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 427 transitions, 6094 flow [2024-06-14 14:01:36,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 427 transitions, 5854 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:36,515 INFO L231 Difference]: Finished difference. Result has 344 places, 393 transitions, 5115 flow [2024-06-14 14:01:36,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4908, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5115, PETRI_PLACES=344, PETRI_TRANSITIONS=393} [2024-06-14 14:01:36,529 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-14 14:01:36,529 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 393 transitions, 5115 flow [2024-06-14 14:01:36,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:36,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:36,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:36,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 14:01:36,530 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:36,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2004410636, now seen corresponding path program 15 times [2024-06-14 14:01:36,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:36,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674266251] [2024-06-14 14:01:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:36,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:36,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:36,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674266251] [2024-06-14 14:01:36,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674266251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:36,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:36,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:01:36,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619473857] [2024-06-14 14:01:36,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:36,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:01:36,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:36,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:01:36,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:01:36,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:36,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 393 transitions, 5115 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:36,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:36,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:36,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:38,220 INFO L124 PetriNetUnfolderBase]: 4029/6979 cut-off events. [2024-06-14 14:01:38,220 INFO L125 PetriNetUnfolderBase]: For 1483379/1483379 co-relation queries the response was YES. [2024-06-14 14:01:38,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61886 conditions, 6979 events. 4029/6979 cut-off events. For 1483379/1483379 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 50433 event pairs, 1197 based on Foata normal form. 6/6981 useless extension candidates. Maximal degree in co-relation 61715. Up to 4518 conditions per place. [2024-06-14 14:01:38,566 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 335 selfloop transitions, 105 changer transitions 0/446 dead transitions. [2024-06-14 14:01:38,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 446 transitions, 6815 flow [2024-06-14 14:01:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:01:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:01:38,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-14 14:01:38,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565410199556541 [2024-06-14 14:01:38,567 INFO L175 Difference]: Start difference. First operand has 344 places, 393 transitions, 5115 flow. Second operand 11 states and 255 transitions. [2024-06-14 14:01:38,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 446 transitions, 6815 flow [2024-06-14 14:01:44,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 446 transitions, 6606 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 14:01:44,669 INFO L231 Difference]: Finished difference. Result has 346 places, 396 transitions, 5340 flow [2024-06-14 14:01:44,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4906, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5340, PETRI_PLACES=346, PETRI_TRANSITIONS=396} [2024-06-14 14:01:44,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 14:01:44,670 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 396 transitions, 5340 flow [2024-06-14 14:01:44,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:44,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:44,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:44,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 14:01:44,670 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:44,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:44,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1452545118, now seen corresponding path program 13 times [2024-06-14 14:01:44,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:44,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890084181] [2024-06-14 14:01:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:44,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:44,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:44,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890084181] [2024-06-14 14:01:44,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890084181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:44,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:44,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:44,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602149802] [2024-06-14 14:01:44,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:44,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:44,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:44,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:44,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:45,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:45,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 396 transitions, 5340 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:45,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:45,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:45,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:46,349 INFO L124 PetriNetUnfolderBase]: 4079/7082 cut-off events. [2024-06-14 14:01:46,349 INFO L125 PetriNetUnfolderBase]: For 1575306/1575306 co-relation queries the response was YES. [2024-06-14 14:01:46,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61851 conditions, 7082 events. 4079/7082 cut-off events. For 1575306/1575306 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 51512 event pairs, 1294 based on Foata normal form. 24/7095 useless extension candidates. Maximal degree in co-relation 61678. Up to 6059 conditions per place. [2024-06-14 14:01:46,464 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 400 selfloop transitions, 25 changer transitions 0/431 dead transitions. [2024-06-14 14:01:46,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 431 transitions, 6536 flow [2024-06-14 14:01:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:01:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:01:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 14:01:46,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-14 14:01:46,465 INFO L175 Difference]: Start difference. First operand has 346 places, 396 transitions, 5340 flow. Second operand 9 states and 197 transitions. [2024-06-14 14:01:46,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 431 transitions, 6536 flow [2024-06-14 14:01:53,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 431 transitions, 6173 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-14 14:01:53,229 INFO L231 Difference]: Finished difference. Result has 347 places, 396 transitions, 5032 flow [2024-06-14 14:01:53,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4977, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5032, PETRI_PLACES=347, PETRI_TRANSITIONS=396} [2024-06-14 14:01:53,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-14 14:01:53,230 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 396 transitions, 5032 flow [2024-06-14 14:01:53,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:53,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:53,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:53,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 14:01:53,231 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:53,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:53,231 INFO L85 PathProgramCache]: Analyzing trace with hash -513203074, now seen corresponding path program 16 times [2024-06-14 14:01:53,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:53,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861875840] [2024-06-14 14:01:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:53,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:53,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:53,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861875840] [2024-06-14 14:01:53,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861875840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:53,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:53,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:53,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421922686] [2024-06-14 14:01:53,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:53,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:53,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:53,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:53,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:53,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:53,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 396 transitions, 5032 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:53,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:53,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:53,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:54,853 INFO L124 PetriNetUnfolderBase]: 4018/6973 cut-off events. [2024-06-14 14:01:54,853 INFO L125 PetriNetUnfolderBase]: For 1447031/1447031 co-relation queries the response was YES. [2024-06-14 14:01:54,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57623 conditions, 6973 events. 4018/6973 cut-off events. For 1447031/1447031 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 50519 event pairs, 1278 based on Foata normal form. 24/6986 useless extension candidates. Maximal degree in co-relation 57450. Up to 6059 conditions per place. [2024-06-14 14:01:54,962 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 385 selfloop transitions, 20 changer transitions 19/430 dead transitions. [2024-06-14 14:01:54,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 430 transitions, 5998 flow [2024-06-14 14:01:54,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:01:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:01:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 14:01:54,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-14 14:01:54,963 INFO L175 Difference]: Start difference. First operand has 347 places, 396 transitions, 5032 flow. Second operand 9 states and 196 transitions. [2024-06-14 14:01:54,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 430 transitions, 5998 flow [2024-06-14 14:02:00,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 430 transitions, 5785 flow, removed 51 selfloop flow, removed 9 redundant places. [2024-06-14 14:02:00,161 INFO L231 Difference]: Finished difference. Result has 347 places, 391 transitions, 4826 flow [2024-06-14 14:02:00,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4819, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4826, PETRI_PLACES=347, PETRI_TRANSITIONS=391} [2024-06-14 14:02:00,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-14 14:02:00,161 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 391 transitions, 4826 flow [2024-06-14 14:02:00,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:00,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:00,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:00,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 14:02:00,162 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:00,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:00,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1984412858, now seen corresponding path program 14 times [2024-06-14 14:02:00,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:00,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239839586] [2024-06-14 14:02:00,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:00,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:00,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:00,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239839586] [2024-06-14 14:02:00,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239839586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:00,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:00,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:00,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497713430] [2024-06-14 14:02:00,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:00,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:00,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:00,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:00,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:00,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:00,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 391 transitions, 4826 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:00,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:00,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:00,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:01,763 INFO L124 PetriNetUnfolderBase]: 3847/6655 cut-off events. [2024-06-14 14:02:01,764 INFO L125 PetriNetUnfolderBase]: For 1361567/1361567 co-relation queries the response was YES. [2024-06-14 14:02:01,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53072 conditions, 6655 events. 3847/6655 cut-off events. For 1361567/1361567 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 47674 event pairs, 1236 based on Foata normal form. 34/6683 useless extension candidates. Maximal degree in co-relation 52900. Up to 5721 conditions per place. [2024-06-14 14:02:01,866 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 335 selfloop transitions, 60 changer transitions 16/417 dead transitions. [2024-06-14 14:02:01,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 417 transitions, 5750 flow [2024-06-14 14:02:01,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:01,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 14:02:01,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-14 14:02:01,868 INFO L175 Difference]: Start difference. First operand has 347 places, 391 transitions, 4826 flow. Second operand 9 states and 199 transitions. [2024-06-14 14:02:01,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 417 transitions, 5750 flow [2024-06-14 14:02:08,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 417 transitions, 5706 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:08,768 INFO L231 Difference]: Finished difference. Result has 343 places, 384 transitions, 4784 flow [2024-06-14 14:02:08,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4782, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4784, PETRI_PLACES=343, PETRI_TRANSITIONS=384} [2024-06-14 14:02:08,768 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-14 14:02:08,769 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 384 transitions, 4784 flow [2024-06-14 14:02:08,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:08,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:08,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:08,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 14:02:08,769 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:08,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:08,770 INFO L85 PathProgramCache]: Analyzing trace with hash 785555496, now seen corresponding path program 15 times [2024-06-14 14:02:08,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:08,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225642675] [2024-06-14 14:02:08,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:08,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:09,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:09,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225642675] [2024-06-14 14:02:09,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225642675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:09,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:09,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:09,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885230307] [2024-06-14 14:02:09,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:09,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:09,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:09,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:09,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:09,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:09,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 384 transitions, 4784 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:09,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:09,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:09,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:10,313 INFO L124 PetriNetUnfolderBase]: 3679/6375 cut-off events. [2024-06-14 14:02:10,314 INFO L125 PetriNetUnfolderBase]: For 1117929/1117947 co-relation queries the response was YES. [2024-06-14 14:02:10,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50741 conditions, 6375 events. 3679/6375 cut-off events. For 1117929/1117947 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 45479 event pairs, 1192 based on Foata normal form. 20/6386 useless extension candidates. Maximal degree in co-relation 50570. Up to 5601 conditions per place. [2024-06-14 14:02:10,481 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 331 selfloop transitions, 56 changer transitions 10/403 dead transitions. [2024-06-14 14:02:10,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 403 transitions, 5644 flow [2024-06-14 14:02:10,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:10,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:10,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 14:02:10,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 14:02:10,482 INFO L175 Difference]: Start difference. First operand has 343 places, 384 transitions, 4784 flow. Second operand 8 states and 174 transitions. [2024-06-14 14:02:10,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 403 transitions, 5644 flow [2024-06-14 14:02:15,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 403 transitions, 5518 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 14:02:15,691 INFO L231 Difference]: Finished difference. Result has 340 places, 380 transitions, 4712 flow [2024-06-14 14:02:15,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4658, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4712, PETRI_PLACES=340, PETRI_TRANSITIONS=380} [2024-06-14 14:02:15,692 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-14 14:02:15,692 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 380 transitions, 4712 flow [2024-06-14 14:02:15,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:15,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:15,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:15,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 14:02:15,693 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:15,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:15,693 INFO L85 PathProgramCache]: Analyzing trace with hash 670264326, now seen corresponding path program 16 times [2024-06-14 14:02:15,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:15,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655903007] [2024-06-14 14:02:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:15,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:15,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:15,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655903007] [2024-06-14 14:02:15,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655903007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:15,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:15,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:15,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135090552] [2024-06-14 14:02:15,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:15,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:15,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:15,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:15,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:15,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:15,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 380 transitions, 4712 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:15,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:15,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:15,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:17,316 INFO L124 PetriNetUnfolderBase]: 3538/6106 cut-off events. [2024-06-14 14:02:17,316 INFO L125 PetriNetUnfolderBase]: For 1046081/1046081 co-relation queries the response was YES. [2024-06-14 14:02:17,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48529 conditions, 6106 events. 3538/6106 cut-off events. For 1046081/1046081 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 42940 event pairs, 1080 based on Foata normal form. 8/6108 useless extension candidates. Maximal degree in co-relation 48359. Up to 5573 conditions per place. [2024-06-14 14:02:17,401 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 368 selfloop transitions, 11 changer transitions 10/395 dead transitions. [2024-06-14 14:02:17,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 395 transitions, 5546 flow [2024-06-14 14:02:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:17,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-14 14:02:17,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 14:02:17,402 INFO L175 Difference]: Start difference. First operand has 340 places, 380 transitions, 4712 flow. Second operand 7 states and 147 transitions. [2024-06-14 14:02:17,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 395 transitions, 5546 flow [2024-06-14 14:02:23,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 395 transitions, 5420 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 14:02:23,739 INFO L231 Difference]: Finished difference. Result has 336 places, 376 transitions, 4545 flow [2024-06-14 14:02:23,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4586, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4545, PETRI_PLACES=336, PETRI_TRANSITIONS=376} [2024-06-14 14:02:23,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-14 14:02:23,740 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 376 transitions, 4545 flow [2024-06-14 14:02:23,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:23,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:23,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:23,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 14:02:23,740 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:23,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:23,741 INFO L85 PathProgramCache]: Analyzing trace with hash 667407366, now seen corresponding path program 17 times [2024-06-14 14:02:23,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:23,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636119075] [2024-06-14 14:02:23,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:23,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:23,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:23,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636119075] [2024-06-14 14:02:23,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636119075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:23,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:23,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:23,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645628733] [2024-06-14 14:02:23,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:23,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:23,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:23,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:23,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:24,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:24,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 376 transitions, 4545 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:24,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:24,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:24,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:25,249 INFO L124 PetriNetUnfolderBase]: 3397/5843 cut-off events. [2024-06-14 14:02:25,250 INFO L125 PetriNetUnfolderBase]: For 975336/975336 co-relation queries the response was YES. [2024-06-14 14:02:25,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46107 conditions, 5843 events. 3397/5843 cut-off events. For 975336/975336 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 40567 event pairs, 980 based on Foata normal form. 8/5845 useless extension candidates. Maximal degree in co-relation 45938. Up to 5293 conditions per place. [2024-06-14 14:02:25,334 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 365 selfloop transitions, 8 changer transitions 16/395 dead transitions. [2024-06-14 14:02:25,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 395 transitions, 5409 flow [2024-06-14 14:02:25,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:25,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-14 14:02:25,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-14 14:02:25,335 INFO L175 Difference]: Start difference. First operand has 336 places, 376 transitions, 4545 flow. Second operand 7 states and 149 transitions. [2024-06-14 14:02:25,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 395 transitions, 5409 flow [2024-06-14 14:02:30,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 395 transitions, 5321 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:30,365 INFO L231 Difference]: Finished difference. Result has 333 places, 371 transitions, 4408 flow [2024-06-14 14:02:30,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4457, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4408, PETRI_PLACES=333, PETRI_TRANSITIONS=371} [2024-06-14 14:02:30,366 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-14 14:02:30,366 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 371 transitions, 4408 flow [2024-06-14 14:02:30,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:30,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:30,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:30,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 14:02:30,366 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:30,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:30,367 INFO L85 PathProgramCache]: Analyzing trace with hash -797218560, now seen corresponding path program 1 times [2024-06-14 14:02:30,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:30,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402247402] [2024-06-14 14:02:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:30,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:30,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:30,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402247402] [2024-06-14 14:02:30,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402247402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:30,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:30,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:02:30,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16405574] [2024-06-14 14:02:30,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:30,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:02:30,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:30,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:02:30,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:02:30,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:30,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 371 transitions, 4408 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:30,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:30,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:30,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:31,897 INFO L124 PetriNetUnfolderBase]: 3321/5693 cut-off events. [2024-06-14 14:02:31,897 INFO L125 PetriNetUnfolderBase]: For 998375/998375 co-relation queries the response was YES. [2024-06-14 14:02:31,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46553 conditions, 5693 events. 3321/5693 cut-off events. For 998375/998375 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 39279 event pairs, 698 based on Foata normal form. 6/5683 useless extension candidates. Maximal degree in co-relation 46386. Up to 4051 conditions per place. [2024-06-14 14:02:31,970 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 294 selfloop transitions, 110 changer transitions 0/410 dead transitions. [2024-06-14 14:02:31,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 410 transitions, 5714 flow [2024-06-14 14:02:31,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:02:31,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:02:31,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 14:02:31,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 14:02:31,972 INFO L175 Difference]: Start difference. First operand has 333 places, 371 transitions, 4408 flow. Second operand 10 states and 225 transitions. [2024-06-14 14:02:31,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 410 transitions, 5714 flow [2024-06-14 14:02:36,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 410 transitions, 5615 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:36,188 INFO L231 Difference]: Finished difference. Result has 332 places, 373 transitions, 4681 flow [2024-06-14 14:02:36,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4681, PETRI_PLACES=332, PETRI_TRANSITIONS=373} [2024-06-14 14:02:36,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-14 14:02:36,191 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 373 transitions, 4681 flow [2024-06-14 14:02:36,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:36,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:36,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:36,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 14:02:36,192 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:36,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:36,196 INFO L85 PathProgramCache]: Analyzing trace with hash -796920030, now seen corresponding path program 2 times [2024-06-14 14:02:36,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:36,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016863324] [2024-06-14 14:02:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:36,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:36,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:36,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016863324] [2024-06-14 14:02:36,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016863324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:36,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:36,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:02:36,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873675156] [2024-06-14 14:02:36,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:36,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:02:36,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:36,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:02:36,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:02:36,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:36,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 373 transitions, 4681 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:36,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:36,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:36,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:37,626 INFO L124 PetriNetUnfolderBase]: 3214/5512 cut-off events. [2024-06-14 14:02:37,627 INFO L125 PetriNetUnfolderBase]: For 848248/848248 co-relation queries the response was YES. [2024-06-14 14:02:37,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43490 conditions, 5512 events. 3214/5512 cut-off events. For 848248/848248 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 37816 event pairs, 620 based on Foata normal form. 6/5502 useless extension candidates. Maximal degree in co-relation 43325. Up to 3858 conditions per place. [2024-06-14 14:02:37,692 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 291 selfloop transitions, 112 changer transitions 0/409 dead transitions. [2024-06-14 14:02:37,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 409 transitions, 5919 flow [2024-06-14 14:02:37,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:02:37,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:02:37,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-14 14:02:37,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-14 14:02:37,694 INFO L175 Difference]: Start difference. First operand has 332 places, 373 transitions, 4681 flow. Second operand 10 states and 224 transitions. [2024-06-14 14:02:37,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 409 transitions, 5919 flow [2024-06-14 14:02:42,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 409 transitions, 5622 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-14 14:02:42,246 INFO L231 Difference]: Finished difference. Result has 334 places, 374 transitions, 4686 flow [2024-06-14 14:02:42,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4398, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4686, PETRI_PLACES=334, PETRI_TRANSITIONS=374} [2024-06-14 14:02:42,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-14 14:02:42,247 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 374 transitions, 4686 flow [2024-06-14 14:02:42,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:42,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:42,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:42,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 14:02:42,248 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:42,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:42,248 INFO L85 PathProgramCache]: Analyzing trace with hash -708354270, now seen corresponding path program 3 times [2024-06-14 14:02:42,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:42,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644658638] [2024-06-14 14:02:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:42,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:42,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:42,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644658638] [2024-06-14 14:02:42,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644658638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:42,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:42,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:02:42,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95131537] [2024-06-14 14:02:42,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:42,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:02:42,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:42,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:02:42,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:02:42,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:42,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 374 transitions, 4686 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:42,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:42,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:42,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:43,699 INFO L124 PetriNetUnfolderBase]: 3201/5501 cut-off events. [2024-06-14 14:02:43,699 INFO L125 PetriNetUnfolderBase]: For 812338/812338 co-relation queries the response was YES. [2024-06-14 14:02:43,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42274 conditions, 5501 events. 3201/5501 cut-off events. For 812338/812338 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 37827 event pairs, 863 based on Foata normal form. 6/5499 useless extension candidates. Maximal degree in co-relation 42108. Up to 4629 conditions per place. [2024-06-14 14:02:43,773 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 297 selfloop transitions, 98 changer transitions 0/401 dead transitions. [2024-06-14 14:02:43,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 401 transitions, 5572 flow [2024-06-14 14:02:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:02:43,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:02:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-14 14:02:43,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292682926829269 [2024-06-14 14:02:43,774 INFO L175 Difference]: Start difference. First operand has 334 places, 374 transitions, 4686 flow. Second operand 10 states and 217 transitions. [2024-06-14 14:02:43,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 401 transitions, 5572 flow [2024-06-14 14:02:48,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 401 transitions, 5299 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:48,306 INFO L231 Difference]: Finished difference. Result has 337 places, 374 transitions, 4613 flow [2024-06-14 14:02:48,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4613, PETRI_PLACES=337, PETRI_TRANSITIONS=374} [2024-06-14 14:02:48,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-14 14:02:48,307 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 374 transitions, 4613 flow [2024-06-14 14:02:48,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:48,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:48,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:48,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 14:02:48,308 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:48,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:48,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1984013144, now seen corresponding path program 1 times [2024-06-14 14:02:48,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:48,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971958969] [2024-06-14 14:02:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:48,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:48,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:48,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971958969] [2024-06-14 14:02:48,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971958969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:48,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:48,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:48,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99093418] [2024-06-14 14:02:48,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:48,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:48,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:48,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:48,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:48,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:48,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 374 transitions, 4613 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:48,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:48,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:48,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:49,703 INFO L124 PetriNetUnfolderBase]: 3289/5663 cut-off events. [2024-06-14 14:02:49,703 INFO L125 PetriNetUnfolderBase]: For 970525/970525 co-relation queries the response was YES. [2024-06-14 14:02:49,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42494 conditions, 5663 events. 3289/5663 cut-off events. For 970525/970525 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 39169 event pairs, 851 based on Foata normal form. 30/5689 useless extension candidates. Maximal degree in co-relation 42327. Up to 4600 conditions per place. [2024-06-14 14:02:49,775 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 333 selfloop transitions, 58 changer transitions 7/404 dead transitions. [2024-06-14 14:02:49,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 404 transitions, 5559 flow [2024-06-14 14:02:49,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:49,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:49,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 14:02:49,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-14 14:02:49,776 INFO L175 Difference]: Start difference. First operand has 337 places, 374 transitions, 4613 flow. Second operand 9 states and 200 transitions. [2024-06-14 14:02:49,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 404 transitions, 5559 flow [2024-06-14 14:02:54,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 404 transitions, 5278 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-14 14:02:54,225 INFO L231 Difference]: Finished difference. Result has 335 places, 371 transitions, 4394 flow [2024-06-14 14:02:54,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4332, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4394, PETRI_PLACES=335, PETRI_TRANSITIONS=371} [2024-06-14 14:02:54,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-14 14:02:54,226 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 371 transitions, 4394 flow [2024-06-14 14:02:54,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:54,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:54,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:54,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 14:02:54,226 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:54,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:54,227 INFO L85 PathProgramCache]: Analyzing trace with hash 785955210, now seen corresponding path program 2 times [2024-06-14 14:02:54,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:54,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420274593] [2024-06-14 14:02:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:54,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:54,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:54,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420274593] [2024-06-14 14:02:54,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420274593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:54,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:54,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:54,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99027740] [2024-06-14 14:02:54,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:54,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:54,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:54,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:54,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:54,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:54,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 371 transitions, 4394 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:54,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:54,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:54,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:55,679 INFO L124 PetriNetUnfolderBase]: 3271/5651 cut-off events. [2024-06-14 14:02:55,680 INFO L125 PetriNetUnfolderBase]: For 832413/832431 co-relation queries the response was YES. [2024-06-14 14:02:55,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42012 conditions, 5651 events. 3271/5651 cut-off events. For 832413/832431 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 39338 event pairs, 951 based on Foata normal form. 18/5662 useless extension candidates. Maximal degree in co-relation 41845. Up to 4936 conditions per place. [2024-06-14 14:02:55,755 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 334 selfloop transitions, 51 changer transitions 0/391 dead transitions. [2024-06-14 14:02:55,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 391 transitions, 5254 flow [2024-06-14 14:02:55,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:55,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 14:02:55,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-14 14:02:55,756 INFO L175 Difference]: Start difference. First operand has 335 places, 371 transitions, 4394 flow. Second operand 8 states and 171 transitions. [2024-06-14 14:02:55,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 391 transitions, 5254 flow [2024-06-14 14:03:00,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 391 transitions, 5116 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 14:03:00,269 INFO L231 Difference]: Finished difference. Result has 336 places, 372 transitions, 4398 flow [2024-06-14 14:03:00,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4256, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4398, PETRI_PLACES=336, PETRI_TRANSITIONS=372} [2024-06-14 14:03:00,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-14 14:03:00,269 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 372 transitions, 4398 flow [2024-06-14 14:03:00,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:00,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:00,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:00,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 14:03:00,270 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:00,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:00,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1051652490, now seen corresponding path program 3 times [2024-06-14 14:03:00,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:00,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62128501] [2024-06-14 14:03:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:00,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:00,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:00,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62128501] [2024-06-14 14:03:00,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62128501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:00,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:00,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:00,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682131661] [2024-06-14 14:03:00,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:00,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:00,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:00,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:00,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:00,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:00,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 372 transitions, 4398 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:00,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:00,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:00,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:01,630 INFO L124 PetriNetUnfolderBase]: 3324/5732 cut-off events. [2024-06-14 14:03:01,630 INFO L125 PetriNetUnfolderBase]: For 887589/887607 co-relation queries the response was YES. [2024-06-14 14:03:01,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43368 conditions, 5732 events. 3324/5732 cut-off events. For 887589/887607 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39767 event pairs, 876 based on Foata normal form. 18/5743 useless extension candidates. Maximal degree in co-relation 43200. Up to 4558 conditions per place. [2024-06-14 14:03:01,706 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 333 selfloop transitions, 63 changer transitions 0/402 dead transitions. [2024-06-14 14:03:01,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 402 transitions, 5610 flow [2024-06-14 14:03:01,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:03:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:03:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 14:03:01,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 14:03:01,708 INFO L175 Difference]: Start difference. First operand has 336 places, 372 transitions, 4398 flow. Second operand 8 states and 182 transitions. [2024-06-14 14:03:01,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 402 transitions, 5610 flow [2024-06-14 14:03:06,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 402 transitions, 5482 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 14:03:06,941 INFO L231 Difference]: Finished difference. Result has 338 places, 374 transitions, 4474 flow [2024-06-14 14:03:06,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4270, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4474, PETRI_PLACES=338, PETRI_TRANSITIONS=374} [2024-06-14 14:03:06,942 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-14 14:03:06,942 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 374 transitions, 4474 flow [2024-06-14 14:03:06,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:06,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:06,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:06,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 14:03:06,943 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:06,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:06,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1051532520, now seen corresponding path program 4 times [2024-06-14 14:03:06,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:06,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176602832] [2024-06-14 14:03:06,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:06,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:07,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:07,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176602832] [2024-06-14 14:03:07,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176602832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:07,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:07,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:07,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693321186] [2024-06-14 14:03:07,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:07,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:07,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:07,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:07,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:07,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:07,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 374 transitions, 4474 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:07,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:07,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:07,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:08,326 INFO L124 PetriNetUnfolderBase]: 3311/5709 cut-off events. [2024-06-14 14:03:08,326 INFO L125 PetriNetUnfolderBase]: For 860702/860702 co-relation queries the response was YES. [2024-06-14 14:03:08,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42639 conditions, 5709 events. 3311/5709 cut-off events. For 860702/860702 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39655 event pairs, 895 based on Foata normal form. 6/5711 useless extension candidates. Maximal degree in co-relation 42470. Up to 5170 conditions per place. [2024-06-14 14:03:08,396 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 373 selfloop transitions, 13 changer transitions 0/392 dead transitions. [2024-06-14 14:03:08,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 392 transitions, 5310 flow [2024-06-14 14:03:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:03:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:03:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-14 14:03:08,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156794425087108 [2024-06-14 14:03:08,398 INFO L175 Difference]: Start difference. First operand has 338 places, 374 transitions, 4474 flow. Second operand 7 states and 148 transitions. [2024-06-14 14:03:08,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 392 transitions, 5310 flow [2024-06-14 14:03:13,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 392 transitions, 5173 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 14:03:13,347 INFO L231 Difference]: Finished difference. Result has 341 places, 374 transitions, 4367 flow [2024-06-14 14:03:13,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4337, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4367, PETRI_PLACES=341, PETRI_TRANSITIONS=374} [2024-06-14 14:03:13,348 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-14 14:03:13,348 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 374 transitions, 4367 flow [2024-06-14 14:03:13,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:13,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:13,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:13,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 14:03:13,349 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:13,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:13,349 INFO L85 PathProgramCache]: Analyzing trace with hash -52766672, now seen corresponding path program 17 times [2024-06-14 14:03:13,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:13,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667410272] [2024-06-14 14:03:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:13,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:13,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:13,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667410272] [2024-06-14 14:03:13,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667410272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:13,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:13,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:03:13,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669775607] [2024-06-14 14:03:13,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:13,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:03:13,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:13,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:03:13,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:03:13,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:13,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 374 transitions, 4367 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:13,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:13,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:13,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:14,983 INFO L124 PetriNetUnfolderBase]: 3372/5806 cut-off events. [2024-06-14 14:03:14,984 INFO L125 PetriNetUnfolderBase]: For 941742/941742 co-relation queries the response was YES. [2024-06-14 14:03:15,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44523 conditions, 5806 events. 3372/5806 cut-off events. For 941742/941742 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 40432 event pairs, 958 based on Foata normal form. 8/5810 useless extension candidates. Maximal degree in co-relation 44352. Up to 4712 conditions per place. [2024-06-14 14:03:15,057 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 185 changer transitions 0/415 dead transitions. [2024-06-14 14:03:15,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 415 transitions, 5695 flow [2024-06-14 14:03:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-14 14:03:15,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549889135254989 [2024-06-14 14:03:15,058 INFO L175 Difference]: Start difference. First operand has 341 places, 374 transitions, 4367 flow. Second operand 11 states and 248 transitions. [2024-06-14 14:03:15,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 415 transitions, 5695 flow [2024-06-14 14:03:19,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 415 transitions, 5581 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 14:03:19,153 INFO L231 Difference]: Finished difference. Result has 344 places, 376 transitions, 4769 flow [2024-06-14 14:03:19,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4253, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4769, PETRI_PLACES=344, PETRI_TRANSITIONS=376} [2024-06-14 14:03:19,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-14 14:03:19,153 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 376 transitions, 4769 flow [2024-06-14 14:03:19,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:19,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:19,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:19,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 14:03:19,154 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:19,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:19,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1990511266, now seen corresponding path program 18 times [2024-06-14 14:03:19,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:19,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775679930] [2024-06-14 14:03:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:19,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:19,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:19,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775679930] [2024-06-14 14:03:19,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775679930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:19,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:19,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:03:19,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767821441] [2024-06-14 14:03:19,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:19,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:03:19,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:19,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:03:19,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:03:19,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:19,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 376 transitions, 4769 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:19,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:19,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:19,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:20,662 INFO L124 PetriNetUnfolderBase]: 3400/5850 cut-off events. [2024-06-14 14:03:20,663 INFO L125 PetriNetUnfolderBase]: For 969988/969988 co-relation queries the response was YES. [2024-06-14 14:03:20,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45529 conditions, 5850 events. 3400/5850 cut-off events. For 969988/969988 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 40764 event pairs, 978 based on Foata normal form. 8/5854 useless extension candidates. Maximal degree in co-relation 45358. Up to 4950 conditions per place. [2024-06-14 14:03:20,737 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 183 changer transitions 0/408 dead transitions. [2024-06-14 14:03:20,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 408 transitions, 5741 flow [2024-06-14 14:03:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-14 14:03:20,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-14 14:03:20,738 INFO L175 Difference]: Start difference. First operand has 344 places, 376 transitions, 4769 flow. Second operand 11 states and 241 transitions. [2024-06-14 14:03:20,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 408 transitions, 5741 flow [2024-06-14 14:03:25,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 408 transitions, 5436 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 14:03:25,656 INFO L231 Difference]: Finished difference. Result has 348 places, 377 transitions, 4909 flow [2024-06-14 14:03:25,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4476, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4909, PETRI_PLACES=348, PETRI_TRANSITIONS=377} [2024-06-14 14:03:25,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-14 14:03:25,657 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 377 transitions, 4909 flow [2024-06-14 14:03:25,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:25,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:25,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:25,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 14:03:25,657 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:25,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:25,658 INFO L85 PathProgramCache]: Analyzing trace with hash 242691538, now seen corresponding path program 19 times [2024-06-14 14:03:25,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:25,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787687691] [2024-06-14 14:03:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:25,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:25,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:25,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787687691] [2024-06-14 14:03:25,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787687691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:25,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:25,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:03:25,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381685292] [2024-06-14 14:03:25,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:25,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:03:25,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:25,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:03:25,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:03:26,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:26,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 377 transitions, 4909 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:26,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:26,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:26,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:27,091 INFO L124 PetriNetUnfolderBase]: 3428/5898 cut-off events. [2024-06-14 14:03:27,092 INFO L125 PetriNetUnfolderBase]: For 977693/977693 co-relation queries the response was YES. [2024-06-14 14:03:27,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46025 conditions, 5898 events. 3428/5898 cut-off events. For 977693/977693 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 41178 event pairs, 984 based on Foata normal form. 8/5902 useless extension candidates. Maximal degree in co-relation 45852. Up to 4994 conditions per place. [2024-06-14 14:03:27,169 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 218 selfloop transitions, 182 changer transitions 0/406 dead transitions. [2024-06-14 14:03:27,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 406 transitions, 5859 flow [2024-06-14 14:03:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:27,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:27,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-14 14:03:27,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-14 14:03:27,170 INFO L175 Difference]: Start difference. First operand has 348 places, 377 transitions, 4909 flow. Second operand 11 states and 239 transitions. [2024-06-14 14:03:27,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 406 transitions, 5859 flow [2024-06-14 14:03:32,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 406 transitions, 5452 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-14 14:03:32,399 INFO L231 Difference]: Finished difference. Result has 350 places, 378 transitions, 4935 flow [2024-06-14 14:03:32,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4502, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4935, PETRI_PLACES=350, PETRI_TRANSITIONS=378} [2024-06-14 14:03:32,400 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-14 14:03:32,400 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 378 transitions, 4935 flow [2024-06-14 14:03:32,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:32,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:32,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:32,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 14:03:32,401 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:32,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:32,401 INFO L85 PathProgramCache]: Analyzing trace with hash 294705534, now seen corresponding path program 20 times [2024-06-14 14:03:32,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:32,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891989549] [2024-06-14 14:03:32,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:32,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:32,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:32,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891989549] [2024-06-14 14:03:32,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891989549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:32,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:32,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:03:32,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467554271] [2024-06-14 14:03:32,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:32,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:03:32,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:32,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:03:32,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:03:32,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:32,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 378 transitions, 4935 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:32,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:32,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:32,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:34,012 INFO L124 PetriNetUnfolderBase]: 3410/5868 cut-off events. [2024-06-14 14:03:34,013 INFO L125 PetriNetUnfolderBase]: For 928271/928271 co-relation queries the response was YES. [2024-06-14 14:03:34,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44547 conditions, 5868 events. 3410/5868 cut-off events. For 928271/928271 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 40963 event pairs, 974 based on Foata normal form. 8/5872 useless extension candidates. Maximal degree in co-relation 44373. Up to 4968 conditions per place. [2024-06-14 14:03:34,092 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 212 selfloop transitions, 185 changer transitions 0/403 dead transitions. [2024-06-14 14:03:34,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 403 transitions, 5809 flow [2024-06-14 14:03:34,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:34,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-14 14:03:34,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-14 14:03:34,093 INFO L175 Difference]: Start difference. First operand has 350 places, 378 transitions, 4935 flow. Second operand 11 states and 235 transitions. [2024-06-14 14:03:34,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 403 transitions, 5809 flow [2024-06-14 14:03:39,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 403 transitions, 5360 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-14 14:03:39,169 INFO L231 Difference]: Finished difference. Result has 352 places, 378 transitions, 4861 flow [2024-06-14 14:03:39,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4861, PETRI_PLACES=352, PETRI_TRANSITIONS=378} [2024-06-14 14:03:39,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-14 14:03:39,169 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 378 transitions, 4861 flow [2024-06-14 14:03:39,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:39,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:39,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:39,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 14:03:39,170 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:39,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:39,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1715893830, now seen corresponding path program 18 times [2024-06-14 14:03:39,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:39,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031502503] [2024-06-14 14:03:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:39,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:39,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:39,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031502503] [2024-06-14 14:03:39,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031502503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:39,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:39,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:39,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827010662] [2024-06-14 14:03:39,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:39,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:39,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:39,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:39,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:39,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:39,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 378 transitions, 4861 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:39,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:39,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:39,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:40,736 INFO L124 PetriNetUnfolderBase]: 3514/6044 cut-off events. [2024-06-14 14:03:40,736 INFO L125 PetriNetUnfolderBase]: For 1123024/1123024 co-relation queries the response was YES. [2024-06-14 14:03:40,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44901 conditions, 6044 events. 3514/6044 cut-off events. For 1123024/1123024 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 42419 event pairs, 1016 based on Foata normal form. 34/6074 useless extension candidates. Maximal degree in co-relation 44726. Up to 5097 conditions per place. [2024-06-14 14:03:40,818 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 288 selfloop transitions, 108 changer transitions 3/405 dead transitions. [2024-06-14 14:03:40,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 405 transitions, 5787 flow [2024-06-14 14:03:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:03:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:03:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-14 14:03:40,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 14:03:40,819 INFO L175 Difference]: Start difference. First operand has 352 places, 378 transitions, 4861 flow. Second operand 10 states and 220 transitions. [2024-06-14 14:03:40,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 405 transitions, 5787 flow [2024-06-14 14:03:45,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 405 transitions, 5401 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 14:03:45,924 INFO L231 Difference]: Finished difference. Result has 352 places, 378 transitions, 4725 flow [2024-06-14 14:03:45,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4475, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4725, PETRI_PLACES=352, PETRI_TRANSITIONS=378} [2024-06-14 14:03:45,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-14 14:03:45,924 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 378 transitions, 4725 flow [2024-06-14 14:03:45,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:45,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:45,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:45,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 14:03:45,925 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:45,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:45,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1943907672, now seen corresponding path program 19 times [2024-06-14 14:03:45,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:45,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836664615] [2024-06-14 14:03:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:45,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:46,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:46,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836664615] [2024-06-14 14:03:46,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836664615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:46,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:46,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:46,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059138049] [2024-06-14 14:03:46,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:46,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:46,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:46,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:46,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:46,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:46,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 378 transitions, 4725 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:46,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:46,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:46,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:47,360 INFO L124 PetriNetUnfolderBase]: 3532/6078 cut-off events. [2024-06-14 14:03:47,360 INFO L125 PetriNetUnfolderBase]: For 952157/952175 co-relation queries the response was YES. [2024-06-14 14:03:47,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45170 conditions, 6078 events. 3532/6078 cut-off events. For 952157/952175 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 42768 event pairs, 1048 based on Foata normal form. 20/6091 useless extension candidates. Maximal degree in co-relation 44994. Up to 5261 conditions per place. [2024-06-14 14:03:47,442 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 281 selfloop transitions, 112 changer transitions 0/399 dead transitions. [2024-06-14 14:03:47,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 399 transitions, 5617 flow [2024-06-14 14:03:47,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:03:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:03:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 14:03:47,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-14 14:03:47,444 INFO L175 Difference]: Start difference. First operand has 352 places, 378 transitions, 4725 flow. Second operand 9 states and 196 transitions. [2024-06-14 14:03:47,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 399 transitions, 5617 flow [2024-06-14 14:03:52,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 399 transitions, 5374 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 14:03:52,114 INFO L231 Difference]: Finished difference. Result has 353 places, 379 transitions, 4751 flow [2024-06-14 14:03:52,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4482, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4751, PETRI_PLACES=353, PETRI_TRANSITIONS=379} [2024-06-14 14:03:52,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-14 14:03:52,115 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 379 transitions, 4751 flow [2024-06-14 14:03:52,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:52,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:52,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:52,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 14:03:52,116 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:52,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:52,116 INFO L85 PathProgramCache]: Analyzing trace with hash 110323816, now seen corresponding path program 20 times [2024-06-14 14:03:52,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:52,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136824542] [2024-06-14 14:03:52,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:52,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:52,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:52,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136824542] [2024-06-14 14:03:52,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136824542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:52,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:52,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:52,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090508178] [2024-06-14 14:03:52,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:52,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:52,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:52,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:52,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:52,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:52,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 379 transitions, 4751 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:52,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:52,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:52,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:53,664 INFO L124 PetriNetUnfolderBase]: 3560/6118 cut-off events. [2024-06-14 14:03:53,664 INFO L125 PetriNetUnfolderBase]: For 964375/964375 co-relation queries the response was YES. [2024-06-14 14:03:53,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45512 conditions, 6118 events. 3560/6118 cut-off events. For 964375/964375 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 42982 event pairs, 1026 based on Foata normal form. 8/6122 useless extension candidates. Maximal degree in co-relation 45335. Up to 5600 conditions per place. [2024-06-14 14:03:53,739 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 372 selfloop transitions, 18 changer transitions 0/396 dead transitions. [2024-06-14 14:03:53,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 396 transitions, 5629 flow [2024-06-14 14:03:53,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:03:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:03:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-14 14:03:53,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 14:03:53,740 INFO L175 Difference]: Start difference. First operand has 353 places, 379 transitions, 4751 flow. Second operand 8 states and 164 transitions. [2024-06-14 14:03:53,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 396 transitions, 5629 flow [2024-06-14 14:03:57,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 396 transitions, 5376 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 14:03:57,396 INFO L231 Difference]: Finished difference. Result has 354 places, 380 transitions, 4581 flow [2024-06-14 14:03:57,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4498, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4581, PETRI_PLACES=354, PETRI_TRANSITIONS=380} [2024-06-14 14:03:57,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-14 14:03:57,396 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 380 transitions, 4581 flow [2024-06-14 14:03:57,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:57,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:57,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:57,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 14:03:57,397 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:57,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:57,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1928215778, now seen corresponding path program 21 times [2024-06-14 14:03:57,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:57,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37528744] [2024-06-14 14:03:57,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:57,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:57,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:57,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37528744] [2024-06-14 14:03:57,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37528744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:57,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:57,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:57,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118916314] [2024-06-14 14:03:57,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:57,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:57,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:57,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:57,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:57,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:57,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 380 transitions, 4581 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:57,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:57,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:57,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:58,929 INFO L124 PetriNetUnfolderBase]: 3608/6194 cut-off events. [2024-06-14 14:03:58,929 INFO L125 PetriNetUnfolderBase]: For 978661/978661 co-relation queries the response was YES. [2024-06-14 14:03:58,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45681 conditions, 6194 events. 3608/6194 cut-off events. For 978661/978661 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 43599 event pairs, 1028 based on Foata normal form. 8/6198 useless extension candidates. Maximal degree in co-relation 45503. Up to 5600 conditions per place. [2024-06-14 14:03:59,011 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 377 selfloop transitions, 20 changer transitions 0/403 dead transitions. [2024-06-14 14:03:59,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 403 transitions, 5515 flow [2024-06-14 14:03:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:03:59,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:03:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-14 14:03:59,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986449864498645 [2024-06-14 14:03:59,013 INFO L175 Difference]: Start difference. First operand has 354 places, 380 transitions, 4581 flow. Second operand 9 states and 184 transitions. [2024-06-14 14:03:59,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 403 transitions, 5515 flow [2024-06-14 14:04:04,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 403 transitions, 5448 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:04,913 INFO L231 Difference]: Finished difference. Result has 358 places, 382 transitions, 4618 flow [2024-06-14 14:04:04,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4514, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4618, PETRI_PLACES=358, PETRI_TRANSITIONS=382} [2024-06-14 14:04:04,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-14 14:04:04,914 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 382 transitions, 4618 flow [2024-06-14 14:04:04,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:04,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:04,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:04,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 14:04:04,914 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:04,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:04,915 INFO L85 PathProgramCache]: Analyzing trace with hash 775758504, now seen corresponding path program 22 times [2024-06-14 14:04:04,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:04,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007147781] [2024-06-14 14:04:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:04,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:05,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:05,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007147781] [2024-06-14 14:04:05,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007147781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:05,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:05,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:05,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009418611] [2024-06-14 14:04:05,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:05,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:05,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:05,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:05,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:05,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:05,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 382 transitions, 4618 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:05,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:05,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:05,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:06,427 INFO L124 PetriNetUnfolderBase]: 3623/6223 cut-off events. [2024-06-14 14:04:06,427 INFO L125 PetriNetUnfolderBase]: For 980542/980560 co-relation queries the response was YES. [2024-06-14 14:04:06,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45673 conditions, 6223 events. 3623/6223 cut-off events. For 980542/980560 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 43894 event pairs, 1075 based on Foata normal form. 20/6236 useless extension candidates. Maximal degree in co-relation 45493. Up to 5406 conditions per place. [2024-06-14 14:04:06,506 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 287 selfloop transitions, 110 changer transitions 0/403 dead transitions. [2024-06-14 14:04:06,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 403 transitions, 5524 flow [2024-06-14 14:04:06,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:04:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:04:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 14:04:06,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 14:04:06,507 INFO L175 Difference]: Start difference. First operand has 358 places, 382 transitions, 4618 flow. Second operand 9 states and 195 transitions. [2024-06-14 14:04:06,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 403 transitions, 5524 flow [2024-06-14 14:04:12,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 403 transitions, 5454 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:12,864 INFO L231 Difference]: Finished difference. Result has 361 places, 383 transitions, 4819 flow [2024-06-14 14:04:12,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4548, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4819, PETRI_PLACES=361, PETRI_TRANSITIONS=383} [2024-06-14 14:04:12,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-14 14:04:12,865 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 383 transitions, 4819 flow [2024-06-14 14:04:12,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:12,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:12,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:12,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 14:04:12,865 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:12,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1477078972, now seen corresponding path program 1 times [2024-06-14 14:04:12,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:12,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011581343] [2024-06-14 14:04:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:12,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:13,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:13,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011581343] [2024-06-14 14:04:13,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011581343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:13,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:13,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:13,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610005786] [2024-06-14 14:04:13,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:13,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:13,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:13,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:13,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:13,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:13,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 383 transitions, 4819 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:13,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:13,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:13,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:14,695 INFO L124 PetriNetUnfolderBase]: 3666/6301 cut-off events. [2024-06-14 14:04:14,696 INFO L125 PetriNetUnfolderBase]: For 929906/929908 co-relation queries the response was YES. [2024-06-14 14:04:14,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45411 conditions, 6301 events. 3666/6301 cut-off events. For 929906/929908 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 44500 event pairs, 1030 based on Foata normal form. 8/6307 useless extension candidates. Maximal degree in co-relation 45230. Up to 5631 conditions per place. [2024-06-14 14:04:14,784 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 380 selfloop transitions, 33 changer transitions 1/420 dead transitions. [2024-06-14 14:04:14,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 420 transitions, 5827 flow [2024-06-14 14:04:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:04:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:04:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 14:04:14,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 14:04:14,785 INFO L175 Difference]: Start difference. First operand has 361 places, 383 transitions, 4819 flow. Second operand 8 states and 182 transitions. [2024-06-14 14:04:14,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 420 transitions, 5827 flow [2024-06-14 14:04:19,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 420 transitions, 5566 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 14:04:19,164 INFO L231 Difference]: Finished difference. Result has 363 places, 388 transitions, 4723 flow [2024-06-14 14:04:19,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4558, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4723, PETRI_PLACES=363, PETRI_TRANSITIONS=388} [2024-06-14 14:04:19,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-14 14:04:19,165 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 388 transitions, 4723 flow [2024-06-14 14:04:19,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:19,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:19,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:19,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 14:04:19,166 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:19,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:19,166 INFO L85 PathProgramCache]: Analyzing trace with hash 947806676, now seen corresponding path program 1 times [2024-06-14 14:04:19,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:19,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655929110] [2024-06-14 14:04:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:19,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:19,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:19,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655929110] [2024-06-14 14:04:19,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655929110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:19,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:19,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:19,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311221727] [2024-06-14 14:04:19,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:19,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:19,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:19,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:19,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:19,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 388 transitions, 4723 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:19,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:19,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:19,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:20,714 INFO L124 PetriNetUnfolderBase]: 3686/6330 cut-off events. [2024-06-14 14:04:20,715 INFO L125 PetriNetUnfolderBase]: For 941598/941600 co-relation queries the response was YES. [2024-06-14 14:04:20,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45413 conditions, 6330 events. 3686/6330 cut-off events. For 941598/941600 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 44760 event pairs, 1033 based on Foata normal form. 8/6336 useless extension candidates. Maximal degree in co-relation 45230. Up to 5592 conditions per place. [2024-06-14 14:04:20,805 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 349 selfloop transitions, 69 changer transitions 1/425 dead transitions. [2024-06-14 14:04:20,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 425 transitions, 5965 flow [2024-06-14 14:04:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:20,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-14 14:04:20,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-14 14:04:20,807 INFO L175 Difference]: Start difference. First operand has 363 places, 388 transitions, 4723 flow. Second operand 11 states and 239 transitions. [2024-06-14 14:04:20,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 425 transitions, 5965 flow [2024-06-14 14:04:26,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 425 transitions, 5833 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:26,809 INFO L231 Difference]: Finished difference. Result has 368 places, 389 transitions, 4769 flow [2024-06-14 14:04:26,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4591, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4769, PETRI_PLACES=368, PETRI_TRANSITIONS=389} [2024-06-14 14:04:26,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-14 14:04:26,810 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 389 transitions, 4769 flow [2024-06-14 14:04:26,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:26,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:26,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:26,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 14:04:26,810 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:26,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:26,810 INFO L85 PathProgramCache]: Analyzing trace with hash 691454036, now seen corresponding path program 2 times [2024-06-14 14:04:26,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:26,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014926579] [2024-06-14 14:04:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:26,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:27,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:27,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014926579] [2024-06-14 14:04:27,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014926579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:27,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:27,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:27,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931881744] [2024-06-14 14:04:27,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:27,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:27,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:27,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:27,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:27,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:27,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 389 transitions, 4769 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:27,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:27,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:27,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:28,411 INFO L124 PetriNetUnfolderBase]: 3668/6311 cut-off events. [2024-06-14 14:04:28,411 INFO L125 PetriNetUnfolderBase]: For 906176/906178 co-relation queries the response was YES. [2024-06-14 14:04:28,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44056 conditions, 6311 events. 3668/6311 cut-off events. For 906176/906178 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 44695 event pairs, 1040 based on Foata normal form. 10/6319 useless extension candidates. Maximal degree in co-relation 43875. Up to 5632 conditions per place. [2024-06-14 14:04:28,496 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 345 selfloop transitions, 65 changer transitions 1/417 dead transitions. [2024-06-14 14:04:28,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 417 transitions, 5679 flow [2024-06-14 14:04:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:04:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:04:28,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-14 14:04:28,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 14:04:28,497 INFO L175 Difference]: Start difference. First operand has 368 places, 389 transitions, 4769 flow. Second operand 10 states and 215 transitions. [2024-06-14 14:04:28,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 417 transitions, 5679 flow [2024-06-14 14:04:32,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 417 transitions, 5502 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-14 14:04:32,963 INFO L231 Difference]: Finished difference. Result has 370 places, 389 transitions, 4727 flow [2024-06-14 14:04:32,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4592, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4727, PETRI_PLACES=370, PETRI_TRANSITIONS=389} [2024-06-14 14:04:32,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-14 14:04:32,963 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 389 transitions, 4727 flow [2024-06-14 14:04:32,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:32,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:32,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:32,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 14:04:32,964 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:32,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:32,964 INFO L85 PathProgramCache]: Analyzing trace with hash -147367000, now seen corresponding path program 4 times [2024-06-14 14:04:32,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:32,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387629601] [2024-06-14 14:04:32,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:32,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:33,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:33,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387629601] [2024-06-14 14:04:33,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387629601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:33,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:33,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:33,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369172447] [2024-06-14 14:04:33,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:33,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:33,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:33,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:33,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:33,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 389 transitions, 4727 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:33,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:33,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:33,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:34,455 INFO L124 PetriNetUnfolderBase]: 3721/6389 cut-off events. [2024-06-14 14:04:34,455 INFO L125 PetriNetUnfolderBase]: For 963271/963271 co-relation queries the response was YES. [2024-06-14 14:04:34,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45873 conditions, 6389 events. 3721/6389 cut-off events. For 963271/963271 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 45200 event pairs, 1029 based on Foata normal form. 6/6387 useless extension candidates. Maximal degree in co-relation 45691. Up to 5027 conditions per place. [2024-06-14 14:04:34,547 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 194 changer transitions 0/432 dead transitions. [2024-06-14 14:04:34,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 432 transitions, 6123 flow [2024-06-14 14:04:34,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-14 14:04:34,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543237250554324 [2024-06-14 14:04:34,548 INFO L175 Difference]: Start difference. First operand has 370 places, 389 transitions, 4727 flow. Second operand 11 states and 250 transitions. [2024-06-14 14:04:34,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 432 transitions, 6123 flow [2024-06-14 14:04:40,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 432 transitions, 5966 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 14:04:40,036 INFO L231 Difference]: Finished difference. Result has 371 places, 391 transitions, 5108 flow [2024-06-14 14:04:40,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4570, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5108, PETRI_PLACES=371, PETRI_TRANSITIONS=391} [2024-06-14 14:04:40,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-14 14:04:40,041 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 391 transitions, 5108 flow [2024-06-14 14:04:40,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:40,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:40,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:40,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 14:04:40,041 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:40,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:40,042 INFO L85 PathProgramCache]: Analyzing trace with hash 154341352, now seen corresponding path program 3 times [2024-06-14 14:04:40,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:40,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486872523] [2024-06-14 14:04:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:40,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:40,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:40,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486872523] [2024-06-14 14:04:40,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486872523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:40,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:40,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:04:40,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316832481] [2024-06-14 14:04:40,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:40,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:04:40,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:40,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:04:40,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:04:40,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:40,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 391 transitions, 5108 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:40,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:40,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:40,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:41,633 INFO L124 PetriNetUnfolderBase]: 3741/6419 cut-off events. [2024-06-14 14:04:41,633 INFO L125 PetriNetUnfolderBase]: For 984281/984283 co-relation queries the response was YES. [2024-06-14 14:04:41,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46683 conditions, 6419 events. 3741/6419 cut-off events. For 984281/984283 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 45437 event pairs, 1052 based on Foata normal form. 8/6423 useless extension candidates. Maximal degree in co-relation 46500. Up to 5678 conditions per place. [2024-06-14 14:04:41,882 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 319 selfloop transitions, 99 changer transitions 1/425 dead transitions. [2024-06-14 14:04:41,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 425 transitions, 6072 flow [2024-06-14 14:04:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:41,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-14 14:04:41,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-14 14:04:41,883 INFO L175 Difference]: Start difference. First operand has 371 places, 391 transitions, 5108 flow. Second operand 11 states and 235 transitions. [2024-06-14 14:04:41,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 425 transitions, 6072 flow [2024-06-14 14:04:47,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 425 transitions, 5619 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-14 14:04:47,244 INFO L231 Difference]: Finished difference. Result has 374 places, 392 transitions, 4895 flow [2024-06-14 14:04:47,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4655, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4895, PETRI_PLACES=374, PETRI_TRANSITIONS=392} [2024-06-14 14:04:47,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-14 14:04:47,245 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 392 transitions, 4895 flow [2024-06-14 14:04:47,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:47,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:47,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:47,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 14:04:47,246 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:47,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:47,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1838195218, now seen corresponding path program 5 times [2024-06-14 14:04:47,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:47,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945883867] [2024-06-14 14:04:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:47,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:47,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:47,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945883867] [2024-06-14 14:04:47,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945883867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:47,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:47,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:47,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382049262] [2024-06-14 14:04:47,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:47,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:47,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:47,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:47,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:47,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:47,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 392 transitions, 4895 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:47,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:47,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:47,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:48,845 INFO L124 PetriNetUnfolderBase]: 3761/6457 cut-off events. [2024-06-14 14:04:48,846 INFO L125 PetriNetUnfolderBase]: For 988119/988119 co-relation queries the response was YES. [2024-06-14 14:04:48,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46481 conditions, 6457 events. 3761/6457 cut-off events. For 988119/988119 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 45732 event pairs, 1045 based on Foata normal form. 6/6455 useless extension candidates. Maximal degree in co-relation 46297. Up to 5071 conditions per place. [2024-06-14 14:04:48,931 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 194 changer transitions 0/432 dead transitions. [2024-06-14 14:04:48,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 432 transitions, 6213 flow [2024-06-14 14:04:48,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-14 14:04:48,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549889135254989 [2024-06-14 14:04:48,933 INFO L175 Difference]: Start difference. First operand has 374 places, 392 transitions, 4895 flow. Second operand 11 states and 248 transitions. [2024-06-14 14:04:48,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 432 transitions, 6213 flow [2024-06-14 14:04:54,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 432 transitions, 5985 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-14 14:04:54,438 INFO L231 Difference]: Finished difference. Result has 376 places, 393 transitions, 5117 flow [2024-06-14 14:04:54,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4667, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5117, PETRI_PLACES=376, PETRI_TRANSITIONS=393} [2024-06-14 14:04:54,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-14 14:04:54,439 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 393 transitions, 5117 flow [2024-06-14 14:04:54,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:54,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:54,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:54,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 14:04:54,440 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:54,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:54,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1703260492, now seen corresponding path program 4 times [2024-06-14 14:04:54,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:54,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082944182] [2024-06-14 14:04:54,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:54,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:54,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:54,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082944182] [2024-06-14 14:04:54,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082944182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:54,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:54,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:04:54,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549669149] [2024-06-14 14:04:54,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:54,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:04:54,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:54,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:04:54,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:04:54,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:54,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 393 transitions, 5117 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:54,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:54,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:54,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:56,200 INFO L124 PetriNetUnfolderBase]: 3789/6514 cut-off events. [2024-06-14 14:04:56,200 INFO L125 PetriNetUnfolderBase]: For 1022932/1022934 co-relation queries the response was YES. [2024-06-14 14:04:56,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47185 conditions, 6514 events. 3789/6514 cut-off events. For 1022932/1022934 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 46364 event pairs, 1083 based on Foata normal form. 10/6522 useless extension candidates. Maximal degree in co-relation 47000. Up to 5790 conditions per place. [2024-06-14 14:04:56,290 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 325 selfloop transitions, 91 changer transitions 1/423 dead transitions. [2024-06-14 14:04:56,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 423 transitions, 6079 flow [2024-06-14 14:04:56,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-14 14:04:56,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144124168514412 [2024-06-14 14:04:56,292 INFO L175 Difference]: Start difference. First operand has 376 places, 393 transitions, 5117 flow. Second operand 11 states and 232 transitions. [2024-06-14 14:04:56,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 423 transitions, 6079 flow [2024-06-14 14:05:02,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 423 transitions, 5672 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:02,117 INFO L231 Difference]: Finished difference. Result has 379 places, 394 transitions, 4937 flow [2024-06-14 14:05:02,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4710, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4937, PETRI_PLACES=379, PETRI_TRANSITIONS=394} [2024-06-14 14:05:02,118 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-14 14:05:02,118 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 394 transitions, 4937 flow [2024-06-14 14:05:02,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:02,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:02,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:02,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 14:05:02,119 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:02,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:02,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1520629690, now seen corresponding path program 5 times [2024-06-14 14:05:02,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:02,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473911695] [2024-06-14 14:05:02,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:02,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:02,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:02,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473911695] [2024-06-14 14:05:02,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473911695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:02,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:02,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:05:02,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507542164] [2024-06-14 14:05:02,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:02,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:05:02,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:02,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:05:02,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:05:02,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:02,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 394 transitions, 4937 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:02,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:02,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:02,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:03,984 INFO L124 PetriNetUnfolderBase]: 3809/6548 cut-off events. [2024-06-14 14:05:03,984 INFO L125 PetriNetUnfolderBase]: For 1018652/1018654 co-relation queries the response was YES. [2024-06-14 14:05:04,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47035 conditions, 6548 events. 3809/6548 cut-off events. For 1018652/1018654 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 46599 event pairs, 1081 based on Foata normal form. 8/6554 useless extension candidates. Maximal degree in co-relation 46849. Up to 5792 conditions per place. [2024-06-14 14:05:04,075 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 327 selfloop transitions, 94 changer transitions 1/428 dead transitions. [2024-06-14 14:05:04,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 428 transitions, 5929 flow [2024-06-14 14:05:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:05:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:05:04,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-14 14:05:04,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101626016260162 [2024-06-14 14:05:04,076 INFO L175 Difference]: Start difference. First operand has 379 places, 394 transitions, 4937 flow. Second operand 12 states and 251 transitions. [2024-06-14 14:05:04,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 428 transitions, 5929 flow [2024-06-14 14:05:09,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 428 transitions, 5718 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-14 14:05:09,846 INFO L231 Difference]: Finished difference. Result has 382 places, 395 transitions, 4960 flow [2024-06-14 14:05:09,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4726, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4960, PETRI_PLACES=382, PETRI_TRANSITIONS=395} [2024-06-14 14:05:09,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-14 14:05:09,847 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 395 transitions, 4960 flow [2024-06-14 14:05:09,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:09,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:09,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:09,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 14:05:09,847 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:09,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:09,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1703408734, now seen corresponding path program 6 times [2024-06-14 14:05:09,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:09,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173593009] [2024-06-14 14:05:09,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:09,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:10,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:10,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173593009] [2024-06-14 14:05:10,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173593009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:10,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:10,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:10,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371946112] [2024-06-14 14:05:10,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:10,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:10,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:10,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:10,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:10,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:10,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 395 transitions, 4960 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:10,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:10,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:10,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:11,578 INFO L124 PetriNetUnfolderBase]: 3829/6579 cut-off events. [2024-06-14 14:05:11,578 INFO L125 PetriNetUnfolderBase]: For 1034223/1034223 co-relation queries the response was YES. [2024-06-14 14:05:11,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47367 conditions, 6579 events. 3829/6579 cut-off events. For 1034223/1034223 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 46851 event pairs, 1097 based on Foata normal form. 6/6579 useless extension candidates. Maximal degree in co-relation 47180. Up to 5583 conditions per place. [2024-06-14 14:05:11,665 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 184 changer transitions 0/427 dead transitions. [2024-06-14 14:05:11,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 427 transitions, 5967 flow [2024-06-14 14:05:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:11,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-14 14:05:11,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-14 14:05:11,666 INFO L175 Difference]: Start difference. First operand has 382 places, 395 transitions, 4960 flow. Second operand 11 states and 241 transitions. [2024-06-14 14:05:11,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 427 transitions, 5967 flow [2024-06-14 14:05:17,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 427 transitions, 5745 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-14 14:05:17,860 INFO L231 Difference]: Finished difference. Result has 383 places, 396 transitions, 5171 flow [2024-06-14 14:05:17,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4738, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5171, PETRI_PLACES=383, PETRI_TRANSITIONS=396} [2024-06-14 14:05:17,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-14 14:05:17,860 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 396 transitions, 5171 flow [2024-06-14 14:05:17,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:17,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:17,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:17,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 14:05:17,861 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:17,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:17,861 INFO L85 PathProgramCache]: Analyzing trace with hash 957003446, now seen corresponding path program 6 times [2024-06-14 14:05:17,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:17,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756021513] [2024-06-14 14:05:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:17,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:18,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:18,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756021513] [2024-06-14 14:05:18,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756021513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:18,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:18,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:18,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513472793] [2024-06-14 14:05:18,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:18,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:18,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:18,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:18,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:18,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:18,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 396 transitions, 5171 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:18,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:18,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:18,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:19,575 INFO L124 PetriNetUnfolderBase]: 3849/6618 cut-off events. [2024-06-14 14:05:19,575 INFO L125 PetriNetUnfolderBase]: For 1052424/1052426 co-relation queries the response was YES. [2024-06-14 14:05:19,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47857 conditions, 6618 events. 3849/6618 cut-off events. For 1052424/1052426 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 47247 event pairs, 921 based on Foata normal form. 8/6624 useless extension candidates. Maximal degree in co-relation 47669. Up to 5720 conditions per place. [2024-06-14 14:05:19,662 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 345 selfloop transitions, 81 changer transitions 1/433 dead transitions. [2024-06-14 14:05:19,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 433 transitions, 6453 flow [2024-06-14 14:05:19,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:19,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:19,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-14 14:05:19,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2024-06-14 14:05:19,663 INFO L175 Difference]: Start difference. First operand has 383 places, 396 transitions, 5171 flow. Second operand 10 states and 223 transitions. [2024-06-14 14:05:19,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 433 transitions, 6453 flow [2024-06-14 14:05:25,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 433 transitions, 6043 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-14 14:05:25,058 INFO L231 Difference]: Finished difference. Result has 384 places, 397 transitions, 4971 flow [2024-06-14 14:05:25,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4761, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4971, PETRI_PLACES=384, PETRI_TRANSITIONS=397} [2024-06-14 14:05:25,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-14 14:05:25,069 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 397 transitions, 4971 flow [2024-06-14 14:05:25,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:25,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:25,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:25,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 14:05:25,070 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:25,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:25,071 INFO L85 PathProgramCache]: Analyzing trace with hash 952167604, now seen corresponding path program 7 times [2024-06-14 14:05:25,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:25,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502143551] [2024-06-14 14:05:25,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:25,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:25,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:25,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502143551] [2024-06-14 14:05:25,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502143551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:25,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:25,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:25,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875125652] [2024-06-14 14:05:25,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:25,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:25,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:25,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:25,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:25,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 397 transitions, 4971 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:25,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:25,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:25,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:26,915 INFO L124 PetriNetUnfolderBase]: 3902/6693 cut-off events. [2024-06-14 14:05:26,915 INFO L125 PetriNetUnfolderBase]: For 1122216/1122218 co-relation queries the response was YES. [2024-06-14 14:05:26,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49223 conditions, 6693 events. 3902/6693 cut-off events. For 1122216/1122218 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 47649 event pairs, 905 based on Foata normal form. 8/6699 useless extension candidates. Maximal degree in co-relation 49034. Up to 5024 conditions per place. [2024-06-14 14:05:27,020 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 329 selfloop transitions, 97 changer transitions 1/433 dead transitions. [2024-06-14 14:05:27,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 433 transitions, 6305 flow [2024-06-14 14:05:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-14 14:05:27,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 14:05:27,021 INFO L175 Difference]: Start difference. First operand has 384 places, 397 transitions, 4971 flow. Second operand 9 states and 204 transitions. [2024-06-14 14:05:27,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 433 transitions, 6305 flow [2024-06-14 14:05:33,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 433 transitions, 6107 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:33,403 INFO L231 Difference]: Finished difference. Result has 385 places, 399 transitions, 5062 flow [2024-06-14 14:05:33,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4773, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5062, PETRI_PLACES=385, PETRI_TRANSITIONS=399} [2024-06-14 14:05:33,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-14 14:05:33,403 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 399 transitions, 5062 flow [2024-06-14 14:05:33,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:33,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:33,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:33,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 14:05:33,404 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:33,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:33,404 INFO L85 PathProgramCache]: Analyzing trace with hash 139742592, now seen corresponding path program 7 times [2024-06-14 14:05:33,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:33,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150241094] [2024-06-14 14:05:33,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:33,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:33,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:33,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150241094] [2024-06-14 14:05:33,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150241094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:33,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:33,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:33,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230243097] [2024-06-14 14:05:33,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:33,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:33,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:33,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:33,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:33,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:33,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 399 transitions, 5062 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:33,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:33,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:33,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:35,177 INFO L124 PetriNetUnfolderBase]: 4049/6933 cut-off events. [2024-06-14 14:05:35,177 INFO L125 PetriNetUnfolderBase]: For 1391263/1391263 co-relation queries the response was YES. [2024-06-14 14:05:35,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54261 conditions, 6933 events. 4049/6933 cut-off events. For 1391263/1391263 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 49317 event pairs, 963 based on Foata normal form. 6/6923 useless extension candidates. Maximal degree in co-relation 54071. Up to 4002 conditions per place. [2024-06-14 14:05:35,276 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 220 changer transitions 0/445 dead transitions. [2024-06-14 14:05:35,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 445 transitions, 6720 flow [2024-06-14 14:05:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-14 14:05:35,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 14:05:35,277 INFO L175 Difference]: Start difference. First operand has 385 places, 399 transitions, 5062 flow. Second operand 11 states and 253 transitions. [2024-06-14 14:05:35,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 445 transitions, 6720 flow [2024-06-14 14:05:43,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 445 transitions, 6597 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:43,072 INFO L231 Difference]: Finished difference. Result has 391 places, 400 transitions, 5455 flow [2024-06-14 14:05:43,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4939, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5455, PETRI_PLACES=391, PETRI_TRANSITIONS=400} [2024-06-14 14:05:43,073 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-14 14:05:43,073 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 400 transitions, 5455 flow [2024-06-14 14:05:43,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:43,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:43,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:43,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 14:05:43,074 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:43,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:43,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2086356596, now seen corresponding path program 8 times [2024-06-14 14:05:43,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:43,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856592634] [2024-06-14 14:05:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:43,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:43,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:43,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856592634] [2024-06-14 14:05:43,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856592634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:43,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:43,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:43,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451177589] [2024-06-14 14:05:43,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:43,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:43,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:43,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:43,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:43,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:43,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 400 transitions, 5455 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:43,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:43,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:43,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:45,059 INFO L124 PetriNetUnfolderBase]: 4069/6975 cut-off events. [2024-06-14 14:05:45,060 INFO L125 PetriNetUnfolderBase]: For 1418942/1418942 co-relation queries the response was YES. [2024-06-14 14:05:45,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55586 conditions, 6975 events. 4069/6975 cut-off events. For 1418942/1418942 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 49722 event pairs, 1005 based on Foata normal form. 6/6971 useless extension candidates. Maximal degree in co-relation 55394. Up to 4014 conditions per place. [2024-06-14 14:05:45,163 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 220 selfloop transitions, 219 changer transitions 0/445 dead transitions. [2024-06-14 14:05:45,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 445 transitions, 7127 flow [2024-06-14 14:05:45,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-14 14:05:45,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587583148558758 [2024-06-14 14:05:45,164 INFO L175 Difference]: Start difference. First operand has 391 places, 400 transitions, 5455 flow. Second operand 11 states and 252 transitions. [2024-06-14 14:05:45,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 445 transitions, 7127 flow Killed by 15