./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 14:05:47,013 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 14:05:47,079 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 14:05:47,084 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 14:05:47,085 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 14:05:47,109 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 14:05:47,110 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 14:05:47,110 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 14:05:47,111 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 14:05:47,114 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 14:05:47,114 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 14:05:47,115 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 14:05:47,115 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 14:05:47,117 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 14:05:47,117 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 14:05:47,117 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 14:05:47,117 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 14:05:47,117 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 14:05:47,118 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 14:05:47,118 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 14:05:47,119 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 14:05:47,119 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 14:05:47,120 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 14:05:47,120 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 14:05:47,120 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 14:05:47,120 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 14:05:47,121 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 14:05:47,121 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 14:05:47,121 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 14:05:47,122 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 14:05:47,124 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 14:05:47,125 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 14:05:47,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:05:47,125 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 14:05:47,126 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 14:05:47,126 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 14:05:47,126 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 14:05:47,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 14:05:47,126 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 14:05:47,127 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 14:05:47,127 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 14:05:47,127 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 14:05:47,127 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 14:05:47,127 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 14:05:47,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 14:05:47,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 14:05:47,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 14:05:47,351 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 14:05:47,352 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 14:05:47,353 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 14:05:47,516 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 14:05:47,517 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 14:05:47,518 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 14:05:48,546 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 14:05:48,744 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 14:05:48,744 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 14:05:48,753 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f10e9aef/f4e15483388d41caa1e738b36ea07438/FLAGe693b6ab6 [2024-06-14 14:05:48,763 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f10e9aef/f4e15483388d41caa1e738b36ea07438 [2024-06-14 14:05:48,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 14:05:48,765 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 14:05:48,771 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 14:05:48,771 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 14:05:48,775 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 14:05:48,775 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:05:47" (1/2) ... [2024-06-14 14:05:48,776 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e5523c7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:48, skipping insertion in model container [2024-06-14 14:05:48,776 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:05:47" (1/2) ... [2024-06-14 14:05:48,777 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c72e42c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:48, skipping insertion in model container [2024-06-14 14:05:48,777 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:05:48" (2/2) ... [2024-06-14 14:05:48,777 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e5523c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:48, skipping insertion in model container [2024-06-14 14:05:48,777 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:05:48" (2/2) ... [2024-06-14 14:05:48,778 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 14:05:48,833 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 14:05:48,834 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! 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 <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! 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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-14 14:05:48,834 INFO L97 edCorrectnessWitness]: Location invariant before [L797-L797] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (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)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-14 14:05:48,834 INFO L97 edCorrectnessWitness]: Location invariant before [L798-L798] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! 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 <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! 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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-14 14:05:48,834 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (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)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-14 14:05:48,835 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 14:05:48,835 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-06-14 14:05:48,883 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 14:05:49,198 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:05:49,206 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 14:05:49,334 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:05:49,369 INFO L206 MainTranslator]: Completed translation [2024-06-14 14:05:49,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:49 WrapperNode [2024-06-14 14:05:49,370 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 14:05:49,370 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 14:05:49,371 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 14:05:49,371 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 14:05:49,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:49" (1/1) ... [2024-06-14 14:05:49,386 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:49" (1/1) ... [2024-06-14 14:05:49,421 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2024-06-14 14:05:49,422 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 14:05:49,422 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 14:05:49,422 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 14:05:49,423 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 14:05:49,431 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:49" (1/1) ... [2024-06-14 14:05:49,431 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:49" (1/1) ... [2024-06-14 14:05:49,434 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:49" (1/1) ... [2024-06-14 14:05:49,447 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 14:05:49,447 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:49" (1/1) ... [2024-06-14 14:05:49,447 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:49" (1/1) ... [2024-06-14 14:05:49,453 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:49" (1/1) ... [2024-06-14 14:05:49,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:49" (1/1) ... [2024-06-14 14:05:49,466 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:49" (1/1) ... [2024-06-14 14:05:49,467 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:49" (1/1) ... [2024-06-14 14:05:49,470 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 14:05:49,470 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 14:05:49,481 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 14:05:49,481 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 14:05:49,482 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:49" (1/1) ... [2024-06-14 14:05:49,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:05:49,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:05:49,505 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 14:05:49,519 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 14:05:49,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 14:05:49,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 14:05:49,553 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 14:05:49,553 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 14:05:49,554 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 14:05:49,554 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 14:05:49,554 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 14:05:49,554 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 14:05:49,554 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 14:05:49,555 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 14:05:49,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 14:05:49,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 14:05:49,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 14:05:49,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 14:05:49,558 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 14:05:49,678 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 14:05:49,680 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 14:05:49,936 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 14:05:49,936 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 14:05:50,014 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 14:05:50,014 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 14:05:50,015 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:05:50 BoogieIcfgContainer [2024-06-14 14:05:50,016 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 14:05:50,018 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 14:05:50,018 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 14:05:50,021 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 14:05:50,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:05:47" (1/4) ... [2024-06-14 14:05:50,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc28c72 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:05:50, skipping insertion in model container [2024-06-14 14:05:50,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 02:05:48" (2/4) ... [2024-06-14 14:05:50,026 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc28c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:05:50, skipping insertion in model container [2024-06-14 14:05:50,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:49" (3/4) ... [2024-06-14 14:05:50,026 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc28c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:05:50, skipping insertion in model container [2024-06-14 14:05:50,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:05:50" (4/4) ... [2024-06-14 14:05:50,027 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 14:05:50,041 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 14:05:50,041 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 14:05:50,041 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 14:05:50,099 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 14:05:50,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 50 transitions, 116 flow [2024-06-14 14:05:50,160 INFO L124 PetriNetUnfolderBase]: 0/46 cut-off events. [2024-06-14 14:05:50,160 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:05:50,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 0/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 14:05:50,163 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 50 transitions, 116 flow [2024-06-14 14:05:50,166 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 40 transitions, 92 flow [2024-06-14 14:05:50,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 14:05:50,183 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;@511140dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 14:05:50,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 14:05:50,187 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 14:05:50,187 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 14:05:50,187 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:05:50,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:50,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 14:05:50,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:05:50,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:50,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1398728841, now seen corresponding path program 1 times [2024-06-14 14:05:50,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:50,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576699990] [2024-06-14 14:05:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:50,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:50,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:50,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576699990] [2024-06-14 14:05:50,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576699990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:50,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:50,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 14:05:50,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962103072] [2024-06-14 14:05:50,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:50,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 14:05:50,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:50,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 14:05:50,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 14:05:50,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2024-06-14 14:05:50,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:50,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:50,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2024-06-14 14:05:50,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:51,295 INFO L124 PetriNetUnfolderBase]: 1447/2146 cut-off events. [2024-06-14 14:05:51,295 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-06-14 14:05:51,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4338 conditions, 2146 events. 1447/2146 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 11653 event pairs, 968 based on Foata normal form. 1/2065 useless extension candidates. Maximal degree in co-relation 4322. Up to 2069 conditions per place. [2024-06-14 14:05:51,313 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 37 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-06-14 14:05:51,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 213 flow [2024-06-14 14:05:51,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 14:05:51,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 14:05:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-06-14 14:05:51,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-14 14:05:51,323 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 92 flow. Second operand 3 states and 106 transitions. [2024-06-14 14:05:51,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 213 flow [2024-06-14 14:05:51,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:51,327 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 127 flow [2024-06-14 14:05:51,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-14 14:05:51,331 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-06-14 14:05:51,331 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 127 flow [2024-06-14 14:05:51,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:51,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:51,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:51,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 14:05:51,332 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:05:51,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:51,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1098718867, now seen corresponding path program 1 times [2024-06-14 14:05:51,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:51,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906604921] [2024-06-14 14:05:51,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:51,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:51,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:51,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906604921] [2024-06-14 14:05:51,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906604921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:51,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:51,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:51,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19300045] [2024-06-14 14:05:51,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:51,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:51,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:51,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:51,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:51,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:05:51,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 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 14:05:51,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:51,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:05:51,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:52,116 INFO L124 PetriNetUnfolderBase]: 2467/3606 cut-off events. [2024-06-14 14:05:52,116 INFO L125 PetriNetUnfolderBase]: For 758/950 co-relation queries the response was YES. [2024-06-14 14:05:52,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8518 conditions, 3606 events. 2467/3606 cut-off events. For 758/950 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19391 event pairs, 1331 based on Foata normal form. 35/3610 useless extension candidates. Maximal degree in co-relation 8503. Up to 3263 conditions per place. [2024-06-14 14:05:52,140 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 53 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-06-14 14:05:52,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 315 flow [2024-06-14 14:05:52,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:05:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:05:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-06-14 14:05:52,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-14 14:05:52,145 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 127 flow. Second operand 4 states and 136 transitions. [2024-06-14 14:05:52,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 315 flow [2024-06-14 14:05:52,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 14:05:52,150 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 154 flow [2024-06-14 14:05:52,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2024-06-14 14:05:52,151 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-06-14 14:05:52,151 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 154 flow [2024-06-14 14:05:52,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 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 14:05:52,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:52,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:52,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 14:05:52,154 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:05:52,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:52,158 INFO L85 PathProgramCache]: Analyzing trace with hash 721389010, now seen corresponding path program 1 times [2024-06-14 14:05:52,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:52,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951492167] [2024-06-14 14:05:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:52,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:52,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:52,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951492167] [2024-06-14 14:05:52,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951492167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:52,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:52,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:05:52,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634315952] [2024-06-14 14:05:52,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:52,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:05:52,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:52,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:05:52,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:05:52,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:05:52,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:52,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:52,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:05:52,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:52,946 INFO L124 PetriNetUnfolderBase]: 2618/4065 cut-off events. [2024-06-14 14:05:52,947 INFO L125 PetriNetUnfolderBase]: For 1862/1910 co-relation queries the response was YES. [2024-06-14 14:05:52,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9970 conditions, 4065 events. 2618/4065 cut-off events. For 1862/1910 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23317 event pairs, 1356 based on Foata normal form. 3/4041 useless extension candidates. Maximal degree in co-relation 9953. Up to 3654 conditions per place. [2024-06-14 14:05:52,972 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 51 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-14 14:05:52,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 346 flow [2024-06-14 14:05:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:05:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:05:52,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-14 14:05:52,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-14 14:05:52,974 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 154 flow. Second operand 4 states and 129 transitions. [2024-06-14 14:05:52,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 346 flow [2024-06-14 14:05:52,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 70 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:52,976 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 214 flow [2024-06-14 14:05:52,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-14 14:05:52,977 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-06-14 14:05:52,977 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 214 flow [2024-06-14 14:05:52,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:52,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:52,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:52,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 14:05:52,978 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:05:52,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:52,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1765159729, now seen corresponding path program 1 times [2024-06-14 14:05:52,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:52,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399584368] [2024-06-14 14:05:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:52,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:53,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:53,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399584368] [2024-06-14 14:05:53,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399584368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:53,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:53,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:05:53,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171876917] [2024-06-14 14:05:53,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:53,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:05:53,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:53,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:05:53,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:05:53,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:05:53,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:53,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:53,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:05:53,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:53,743 INFO L124 PetriNetUnfolderBase]: 2603/4010 cut-off events. [2024-06-14 14:05:53,743 INFO L125 PetriNetUnfolderBase]: For 3311/3363 co-relation queries the response was YES. [2024-06-14 14:05:53,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11039 conditions, 4010 events. 2603/4010 cut-off events. For 3311/3363 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22824 event pairs, 1272 based on Foata normal form. 6/3972 useless extension candidates. Maximal degree in co-relation 11020. Up to 3603 conditions per place. [2024-06-14 14:05:53,770 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 59 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-06-14 14:05:53,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 436 flow [2024-06-14 14:05:53,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:53,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-14 14:05:53,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632 [2024-06-14 14:05:53,773 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 214 flow. Second operand 5 states and 158 transitions. [2024-06-14 14:05:53,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 436 flow [2024-06-14 14:05:53,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 432 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 14:05:53,777 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 266 flow [2024-06-14 14:05:53,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-14 14:05:53,777 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-06-14 14:05:53,777 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 266 flow [2024-06-14 14:05:53,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:53,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:53,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:53,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 14:05:53,778 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:05:53,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:53,779 INFO L85 PathProgramCache]: Analyzing trace with hash -187121951, now seen corresponding path program 1 times [2024-06-14 14:05:53,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:53,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563578544] [2024-06-14 14:05:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:53,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:54,169 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 14:05:54,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:54,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563578544] [2024-06-14 14:05:54,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563578544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:54,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:54,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:54,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084140121] [2024-06-14 14:05:54,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:54,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:54,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:54,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:54,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:54,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:05:54,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:05:54,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:54,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:05:54,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:54,683 INFO L124 PetriNetUnfolderBase]: 3372/5077 cut-off events. [2024-06-14 14:05:54,683 INFO L125 PetriNetUnfolderBase]: For 6315/6366 co-relation queries the response was YES. [2024-06-14 14:05:54,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15120 conditions, 5077 events. 3372/5077 cut-off events. For 6315/6366 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28307 event pairs, 1298 based on Foata normal form. 16/5064 useless extension candidates. Maximal degree in co-relation 15098. Up to 4533 conditions per place. [2024-06-14 14:05:54,719 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 57 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2024-06-14 14:05:54,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 508 flow [2024-06-14 14:05:54,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:05:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:05:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-14 14:05:54,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-06-14 14:05:54,723 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 266 flow. Second operand 4 states and 132 transitions. [2024-06-14 14:05:54,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 508 flow [2024-06-14 14:05:54,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 478 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:54,732 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 334 flow [2024-06-14 14:05:54,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=334, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-14 14:05:54,734 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2024-06-14 14:05:54,735 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 334 flow [2024-06-14 14:05:54,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:05:54,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:54,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:54,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 14:05:54,735 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:05:54,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:54,736 INFO L85 PathProgramCache]: Analyzing trace with hash -167339921, now seen corresponding path program 2 times [2024-06-14 14:05:54,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:54,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128972393] [2024-06-14 14:05:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:54,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:55,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:55,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128972393] [2024-06-14 14:05:55,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128972393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:55,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:55,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:55,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082672258] [2024-06-14 14:05:55,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:55,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:55,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:55,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:55,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:55,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:05:55,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 334 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:05:55,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:55,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:05:55,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:55,513 INFO L124 PetriNetUnfolderBase]: 3363/5187 cut-off events. [2024-06-14 14:05:55,514 INFO L125 PetriNetUnfolderBase]: For 9840/10023 co-relation queries the response was YES. [2024-06-14 14:05:55,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17172 conditions, 5187 events. 3363/5187 cut-off events. For 9840/10023 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29767 event pairs, 1431 based on Foata normal form. 18/5171 useless extension candidates. Maximal degree in co-relation 17149. Up to 4575 conditions per place. [2024-06-14 14:05:55,544 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 70 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-06-14 14:05:55,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 99 transitions, 672 flow [2024-06-14 14:05:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:55,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-14 14:05:55,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632 [2024-06-14 14:05:55,546 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 334 flow. Second operand 5 states and 158 transitions. [2024-06-14 14:05:55,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 99 transitions, 672 flow [2024-06-14 14:05:55,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 99 transitions, 606 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:55,560 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 449 flow [2024-06-14 14:05:55,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=449, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2024-06-14 14:05:55,561 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 15 predicate places. [2024-06-14 14:05:55,561 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 449 flow [2024-06-14 14:05:55,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:05:55,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:55,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:55,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 14:05:55,562 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:05:55,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1155763418, now seen corresponding path program 1 times [2024-06-14 14:05:55,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:55,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448160418] [2024-06-14 14:05:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:55,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:55,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:55,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448160418] [2024-06-14 14:05:55,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448160418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:55,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:55,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:55,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127855066] [2024-06-14 14:05:55,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:55,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:55,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:55,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:55,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:55,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:05:55,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 449 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:55,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:55,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:05:55,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:56,665 INFO L124 PetriNetUnfolderBase]: 4824/7274 cut-off events. [2024-06-14 14:05:56,665 INFO L125 PetriNetUnfolderBase]: For 18241/18455 co-relation queries the response was YES. [2024-06-14 14:05:56,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25586 conditions, 7274 events. 4824/7274 cut-off events. For 18241/18455 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43869 event pairs, 1097 based on Foata normal form. 104/7312 useless extension candidates. Maximal degree in co-relation 25560. Up to 4682 conditions per place. [2024-06-14 14:05:56,705 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 89 selfloop transitions, 34 changer transitions 0/132 dead transitions. [2024-06-14 14:05:56,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 132 transitions, 951 flow [2024-06-14 14:05:56,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:56,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2024-06-14 14:05:56,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-14 14:05:56,706 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 449 flow. Second operand 6 states and 204 transitions. [2024-06-14 14:05:56,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 132 transitions, 951 flow [2024-06-14 14:05:56,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 132 transitions, 919 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-14 14:05:56,718 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 596 flow [2024-06-14 14:05:56,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=596, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-06-14 14:05:56,719 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 22 predicate places. [2024-06-14 14:05:56,719 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 596 flow [2024-06-14 14:05:56,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:56,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:56,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:56,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 14:05:56,720 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:05:56,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:56,720 INFO L85 PathProgramCache]: Analyzing trace with hash -546121448, now seen corresponding path program 2 times [2024-06-14 14:05:56,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:56,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396897998] [2024-06-14 14:05:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:56,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:57,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:57,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396897998] [2024-06-14 14:05:57,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396897998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:57,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:57,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:57,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817173081] [2024-06-14 14:05:57,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:57,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:57,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:57,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:57,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:57,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:05:57,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 596 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:57,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:57,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:05:57,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:57,654 INFO L124 PetriNetUnfolderBase]: 4554/6934 cut-off events. [2024-06-14 14:05:57,654 INFO L125 PetriNetUnfolderBase]: For 24495/24729 co-relation queries the response was YES. [2024-06-14 14:05:57,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26099 conditions, 6934 events. 4554/6934 cut-off events. For 24495/24729 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41837 event pairs, 1415 based on Foata normal form. 122/6984 useless extension candidates. Maximal degree in co-relation 26069. Up to 5428 conditions per place. [2024-06-14 14:05:57,696 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 79 selfloop transitions, 29 changer transitions 0/117 dead transitions. [2024-06-14 14:05:57,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 942 flow [2024-06-14 14:05:57,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-06-14 14:05:57,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.664 [2024-06-14 14:05:57,698 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 596 flow. Second operand 5 states and 166 transitions. [2024-06-14 14:05:57,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 942 flow [2024-06-14 14:05:57,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 890 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:57,722 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 648 flow [2024-06-14 14:05:57,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=648, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-14 14:05:57,723 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 25 predicate places. [2024-06-14 14:05:57,723 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 648 flow [2024-06-14 14:05:57,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:57,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:57,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:57,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 14:05:57,724 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:05:57,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:57,724 INFO L85 PathProgramCache]: Analyzing trace with hash 679773506, now seen corresponding path program 3 times [2024-06-14 14:05:57,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:57,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126688483] [2024-06-14 14:05:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:57,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:58,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:58,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126688483] [2024-06-14 14:05:58,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126688483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:58,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:58,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:58,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957371402] [2024-06-14 14:05:58,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:58,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:58,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:58,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:58,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:58,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:05:58,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 648 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:58,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:58,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:05:58,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:58,736 INFO L124 PetriNetUnfolderBase]: 4631/7074 cut-off events. [2024-06-14 14:05:58,736 INFO L125 PetriNetUnfolderBase]: For 25173/25461 co-relation queries the response was YES. [2024-06-14 14:05:58,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27072 conditions, 7074 events. 4631/7074 cut-off events. For 25173/25461 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42819 event pairs, 1615 based on Foata normal form. 34/7042 useless extension candidates. Maximal degree in co-relation 27040. Up to 6275 conditions per place. [2024-06-14 14:05:58,783 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 91 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-14 14:05:58,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 122 transitions, 1002 flow [2024-06-14 14:05:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:58,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-14 14:05:58,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-06-14 14:05:58,785 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 648 flow. Second operand 6 states and 188 transitions. [2024-06-14 14:05:58,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 122 transitions, 1002 flow [2024-06-14 14:05:58,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 122 transitions, 954 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:58,818 INFO L231 Difference]: Finished difference. Result has 81 places, 85 transitions, 684 flow [2024-06-14 14:05:58,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=684, PETRI_PLACES=81, PETRI_TRANSITIONS=85} [2024-06-14 14:05:58,819 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 28 predicate places. [2024-06-14 14:05:58,819 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 85 transitions, 684 flow [2024-06-14 14:05:58,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:58,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:58,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:58,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 14:05:58,820 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:05:58,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:58,820 INFO L85 PathProgramCache]: Analyzing trace with hash 679957956, now seen corresponding path program 1 times [2024-06-14 14:05:58,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:58,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622795295] [2024-06-14 14:05:58,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:58,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:59,123 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 14:05:59,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:59,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622795295] [2024-06-14 14:05:59,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622795295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:59,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:59,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:59,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156249427] [2024-06-14 14:05:59,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:59,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:59,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:59,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:59,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:05:59,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 85 transitions, 684 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:59,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:59,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:05:59,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:59,783 INFO L124 PetriNetUnfolderBase]: 4592/7017 cut-off events. [2024-06-14 14:05:59,783 INFO L125 PetriNetUnfolderBase]: For 27468/27756 co-relation queries the response was YES. [2024-06-14 14:05:59,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27212 conditions, 7017 events. 4592/7017 cut-off events. For 27468/27756 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42383 event pairs, 1399 based on Foata normal form. 28/6979 useless extension candidates. Maximal degree in co-relation 27179. Up to 5876 conditions per place. [2024-06-14 14:05:59,833 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 91 selfloop transitions, 28 changer transitions 0/128 dead transitions. [2024-06-14 14:05:59,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 128 transitions, 1065 flow [2024-06-14 14:05:59,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:59,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-14 14:05:59,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-14 14:05:59,834 INFO L175 Difference]: Start difference. First operand has 81 places, 85 transitions, 684 flow. Second operand 6 states and 190 transitions. [2024-06-14 14:05:59,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 128 transitions, 1065 flow [2024-06-14 14:05:59,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 128 transitions, 1011 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:59,870 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 738 flow [2024-06-14 14:05:59,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=738, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2024-06-14 14:05:59,871 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 30 predicate places. [2024-06-14 14:05:59,871 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 738 flow [2024-06-14 14:05:59,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:59,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:59,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:59,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 14:05:59,872 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:05:59,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:59,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1703392822, now seen corresponding path program 1 times [2024-06-14 14:05:59,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:59,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588253704] [2024-06-14 14:05:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:59,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:00,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:00,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588253704] [2024-06-14 14:06:00,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588253704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:00,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:00,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:00,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949105982] [2024-06-14 14:06:00,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:00,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:00,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:00,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:00,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:00,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:06:00,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 87 transitions, 738 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:00,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:00,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:06:00,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:00,723 INFO L124 PetriNetUnfolderBase]: 3701/5679 cut-off events. [2024-06-14 14:06:00,724 INFO L125 PetriNetUnfolderBase]: For 26485/26706 co-relation queries the response was YES. [2024-06-14 14:06:00,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23361 conditions, 5679 events. 3701/5679 cut-off events. For 26485/26706 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33961 event pairs, 1373 based on Foata normal form. 6/5626 useless extension candidates. Maximal degree in co-relation 23326. Up to 5213 conditions per place. [2024-06-14 14:06:00,754 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 89 selfloop transitions, 20 changer transitions 0/119 dead transitions. [2024-06-14 14:06:00,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 1112 flow [2024-06-14 14:06:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:00,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-14 14:06:00,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 14:06:00,756 INFO L175 Difference]: Start difference. First operand has 83 places, 87 transitions, 738 flow. Second operand 5 states and 155 transitions. [2024-06-14 14:06:00,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 1112 flow [2024-06-14 14:06:00,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 119 transitions, 1053 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:00,784 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 868 flow [2024-06-14 14:06:00,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=868, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-06-14 14:06:00,784 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 34 predicate places. [2024-06-14 14:06:00,785 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 868 flow [2024-06-14 14:06:00,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:00,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:00,785 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 14:06:00,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 14:06:00,785 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:00,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:00,786 INFO L85 PathProgramCache]: Analyzing trace with hash 260177026, now seen corresponding path program 1 times [2024-06-14 14:06:00,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:00,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155913414] [2024-06-14 14:06:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:00,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:01,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:01,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155913414] [2024-06-14 14:06:01,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155913414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:01,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:01,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:06:01,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960704457] [2024-06-14 14:06:01,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:01,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:06:01,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:01,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:06:01,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:06:01,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:06:01,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 868 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:01,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:01,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:06:01,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:01,779 INFO L124 PetriNetUnfolderBase]: 5235/7922 cut-off events. [2024-06-14 14:06:01,779 INFO L125 PetriNetUnfolderBase]: For 41689/41796 co-relation queries the response was YES. [2024-06-14 14:06:01,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31932 conditions, 7922 events. 5235/7922 cut-off events. For 41689/41796 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 48613 event pairs, 1984 based on Foata normal form. 13/7779 useless extension candidates. Maximal degree in co-relation 31894. Up to 7087 conditions per place. [2024-06-14 14:06:01,834 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 78 selfloop transitions, 11 changer transitions 0/119 dead transitions. [2024-06-14 14:06:01,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 119 transitions, 1144 flow [2024-06-14 14:06:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:06:01,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:06:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-14 14:06:01,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:06:01,836 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 868 flow. Second operand 4 states and 120 transitions. [2024-06-14 14:06:01,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 119 transitions, 1144 flow [2024-06-14 14:06:01,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 1102 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-14 14:06:01,908 INFO L231 Difference]: Finished difference. Result has 92 places, 108 transitions, 949 flow [2024-06-14 14:06:01,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=949, PETRI_PLACES=92, PETRI_TRANSITIONS=108} [2024-06-14 14:06:01,908 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 39 predicate places. [2024-06-14 14:06:01,909 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 108 transitions, 949 flow [2024-06-14 14:06:01,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:01,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:01,909 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 14:06:01,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 14:06:01,909 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:01,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:01,910 INFO L85 PathProgramCache]: Analyzing trace with hash -580774871, now seen corresponding path program 1 times [2024-06-14 14:06:01,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:01,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019038440] [2024-06-14 14:06:01,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:01,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:02,292 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 14:06:02,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:02,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019038440] [2024-06-14 14:06:02,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019038440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:02,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:02,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:02,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268272537] [2024-06-14 14:06:02,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:02,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:02,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:02,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:02,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:02,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:06:02,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 108 transitions, 949 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:02,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:02,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:06:02,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:03,081 INFO L124 PetriNetUnfolderBase]: 4484/6959 cut-off events. [2024-06-14 14:06:03,081 INFO L125 PetriNetUnfolderBase]: For 42622/42940 co-relation queries the response was YES. [2024-06-14 14:06:03,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30874 conditions, 6959 events. 4484/6959 cut-off events. For 42622/42940 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 43192 event pairs, 1425 based on Foata normal form. 52/6941 useless extension candidates. Maximal degree in co-relation 30832. Up to 5675 conditions per place. [2024-06-14 14:06:03,130 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 104 selfloop transitions, 32 changer transitions 0/150 dead transitions. [2024-06-14 14:06:03,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 150 transitions, 1456 flow [2024-06-14 14:06:03,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-14 14:06:03,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-14 14:06:03,131 INFO L175 Difference]: Start difference. First operand has 92 places, 108 transitions, 949 flow. Second operand 6 states and 190 transitions. [2024-06-14 14:06:03,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 150 transitions, 1456 flow [2024-06-14 14:06:03,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 150 transitions, 1452 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 14:06:03,201 INFO L231 Difference]: Finished difference. Result has 99 places, 113 transitions, 1119 flow [2024-06-14 14:06:03,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1119, PETRI_PLACES=99, PETRI_TRANSITIONS=113} [2024-06-14 14:06:03,202 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 46 predicate places. [2024-06-14 14:06:03,202 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 113 transitions, 1119 flow [2024-06-14 14:06:03,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:03,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:03,203 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 14:06:03,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 14:06:03,203 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:03,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:03,203 INFO L85 PathProgramCache]: Analyzing trace with hash -580714421, now seen corresponding path program 2 times [2024-06-14 14:06:03,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:03,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623586230] [2024-06-14 14:06:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:03,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:03,516 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 14:06:03,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:03,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623586230] [2024-06-14 14:06:03,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623586230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:03,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:03,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:03,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671333137] [2024-06-14 14:06:03,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:03,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:03,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:03,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:03,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:03,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:06:03,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 113 transitions, 1119 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:03,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:03,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:06:03,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:04,210 INFO L124 PetriNetUnfolderBase]: 4412/6869 cut-off events. [2024-06-14 14:06:04,210 INFO L125 PetriNetUnfolderBase]: For 48146/48464 co-relation queries the response was YES. [2024-06-14 14:06:04,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31285 conditions, 6869 events. 4412/6869 cut-off events. For 48146/48464 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 42869 event pairs, 1542 based on Foata normal form. 60/6859 useless extension candidates. Maximal degree in co-relation 31239. Up to 6043 conditions per place. [2024-06-14 14:06:04,260 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 102 selfloop transitions, 26 changer transitions 0/142 dead transitions. [2024-06-14 14:06:04,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 142 transitions, 1459 flow [2024-06-14 14:06:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-14 14:06:04,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-14 14:06:04,263 INFO L175 Difference]: Start difference. First operand has 99 places, 113 transitions, 1119 flow. Second operand 6 states and 183 transitions. [2024-06-14 14:06:04,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 142 transitions, 1459 flow [2024-06-14 14:06:04,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 142 transitions, 1377 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:04,368 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 1097 flow [2024-06-14 14:06:04,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1097, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2024-06-14 14:06:04,369 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 49 predicate places. [2024-06-14 14:06:04,369 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 1097 flow [2024-06-14 14:06:04,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:04,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:04,370 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 14:06:04,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 14:06:04,370 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:04,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:04,370 INFO L85 PathProgramCache]: Analyzing trace with hash -304391433, now seen corresponding path program 1 times [2024-06-14 14:06:04,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:04,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524876077] [2024-06-14 14:06:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:04,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:04,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:04,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524876077] [2024-06-14 14:06:04,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524876077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:04,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:04,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:04,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143932208] [2024-06-14 14:06:04,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:04,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:04,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:04,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:04,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:04,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:04,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 1097 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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 14:06:04,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:04,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:04,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:05,480 INFO L124 PetriNetUnfolderBase]: 5417/8126 cut-off events. [2024-06-14 14:06:05,480 INFO L125 PetriNetUnfolderBase]: For 53881/54166 co-relation queries the response was YES. [2024-06-14 14:06:05,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36571 conditions, 8126 events. 5417/8126 cut-off events. For 53881/54166 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 49172 event pairs, 1736 based on Foata normal form. 36/8063 useless extension candidates. Maximal degree in co-relation 36524. Up to 7342 conditions per place. [2024-06-14 14:06:05,542 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 89 selfloop transitions, 41 changer transitions 0/141 dead transitions. [2024-06-14 14:06:05,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 141 transitions, 1469 flow [2024-06-14 14:06:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:05,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:05,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-14 14:06:05,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628 [2024-06-14 14:06:05,544 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 1097 flow. Second operand 5 states and 157 transitions. [2024-06-14 14:06:05,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 141 transitions, 1469 flow [2024-06-14 14:06:05,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 141 transitions, 1413 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:05,628 INFO L231 Difference]: Finished difference. Result has 103 places, 117 transitions, 1191 flow [2024-06-14 14:06:05,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1191, PETRI_PLACES=103, PETRI_TRANSITIONS=117} [2024-06-14 14:06:05,628 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 50 predicate places. [2024-06-14 14:06:05,628 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 117 transitions, 1191 flow [2024-06-14 14:06:05,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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 14:06:05,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:05,629 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 14:06:05,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 14:06:05,629 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:05,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:05,630 INFO L85 PathProgramCache]: Analyzing trace with hash -189100263, now seen corresponding path program 2 times [2024-06-14 14:06:05,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:05,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042228346] [2024-06-14 14:06:05,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:05,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:05,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:05,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042228346] [2024-06-14 14:06:05,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042228346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:05,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:05,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:05,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277446720] [2024-06-14 14:06:05,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:05,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:05,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:05,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:05,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:05,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:05,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 117 transitions, 1191 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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 14:06:05,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:05,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:05,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:06,741 INFO L124 PetriNetUnfolderBase]: 5484/8231 cut-off events. [2024-06-14 14:06:06,742 INFO L125 PetriNetUnfolderBase]: For 62575/62990 co-relation queries the response was YES. [2024-06-14 14:06:06,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38995 conditions, 8231 events. 5484/8231 cut-off events. For 62575/62990 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 49827 event pairs, 1740 based on Foata normal form. 66/8200 useless extension candidates. Maximal degree in co-relation 38947. Up to 7386 conditions per place. [2024-06-14 14:06:06,809 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 95 selfloop transitions, 51 changer transitions 0/157 dead transitions. [2024-06-14 14:06:06,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 157 transitions, 1729 flow [2024-06-14 14:06:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-14 14:06:06,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 14:06:06,811 INFO L175 Difference]: Start difference. First operand has 103 places, 117 transitions, 1191 flow. Second operand 6 states and 186 transitions. [2024-06-14 14:06:06,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 157 transitions, 1729 flow [2024-06-14 14:06:06,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 157 transitions, 1627 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:06,933 INFO L231 Difference]: Finished difference. Result has 106 places, 125 transitions, 1316 flow [2024-06-14 14:06:06,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1316, PETRI_PLACES=106, PETRI_TRANSITIONS=125} [2024-06-14 14:06:06,933 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 53 predicate places. [2024-06-14 14:06:06,933 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 125 transitions, 1316 flow [2024-06-14 14:06:06,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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 14:06:06,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:06,934 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 14:06:06,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 14:06:06,934 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:06,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:06,934 INFO L85 PathProgramCache]: Analyzing trace with hash -188831493, now seen corresponding path program 3 times [2024-06-14 14:06:06,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:06,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306644623] [2024-06-14 14:06:06,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:06,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:07,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:07,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306644623] [2024-06-14 14:06:07,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306644623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:07,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:07,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:07,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194543167] [2024-06-14 14:06:07,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:07,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:07,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:07,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:07,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:07,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:07,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 125 transitions, 1316 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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 14:06:07,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:07,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:07,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:08,018 INFO L124 PetriNetUnfolderBase]: 5500/8257 cut-off events. [2024-06-14 14:06:08,018 INFO L125 PetriNetUnfolderBase]: For 73048/73470 co-relation queries the response was YES. [2024-06-14 14:06:08,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41106 conditions, 8257 events. 5500/8257 cut-off events. For 73048/73470 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 50089 event pairs, 1740 based on Foata normal form. 79/8239 useless extension candidates. Maximal degree in co-relation 41057. Up to 7403 conditions per place. [2024-06-14 14:06:08,082 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 93 selfloop transitions, 55 changer transitions 0/159 dead transitions. [2024-06-14 14:06:08,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 159 transitions, 1812 flow [2024-06-14 14:06:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:08,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-14 14:06:08,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-06-14 14:06:08,084 INFO L175 Difference]: Start difference. First operand has 106 places, 125 transitions, 1316 flow. Second operand 6 states and 184 transitions. [2024-06-14 14:06:08,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 159 transitions, 1812 flow [2024-06-14 14:06:08,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1713 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:08,223 INFO L231 Difference]: Finished difference. Result has 110 places, 129 transitions, 1398 flow [2024-06-14 14:06:08,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1398, PETRI_PLACES=110, PETRI_TRANSITIONS=129} [2024-06-14 14:06:08,224 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 57 predicate places. [2024-06-14 14:06:08,224 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 129 transitions, 1398 flow [2024-06-14 14:06:08,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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 14:06:08,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:08,225 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 14:06:08,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 14:06:08,225 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:08,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:08,225 INFO L85 PathProgramCache]: Analyzing trace with hash 341305113, now seen corresponding path program 4 times [2024-06-14 14:06:08,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:08,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734817664] [2024-06-14 14:06:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:08,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:08,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:08,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734817664] [2024-06-14 14:06:08,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734817664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:08,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:08,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:08,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011140425] [2024-06-14 14:06:08,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:08,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:08,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:08,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:08,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:08,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:08,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 129 transitions, 1398 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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 14:06:08,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:08,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:08,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:09,292 INFO L124 PetriNetUnfolderBase]: 5458/8195 cut-off events. [2024-06-14 14:06:09,292 INFO L125 PetriNetUnfolderBase]: For 77086/77493 co-relation queries the response was YES. [2024-06-14 14:06:09,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41208 conditions, 8195 events. 5458/8195 cut-off events. For 77086/77493 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 49693 event pairs, 1736 based on Foata normal form. 26/8124 useless extension candidates. Maximal degree in co-relation 41157. Up to 7400 conditions per place. [2024-06-14 14:06:09,354 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 103 selfloop transitions, 41 changer transitions 0/155 dead transitions. [2024-06-14 14:06:09,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 155 transitions, 1756 flow [2024-06-14 14:06:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:09,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-14 14:06:09,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.636 [2024-06-14 14:06:09,356 INFO L175 Difference]: Start difference. First operand has 110 places, 129 transitions, 1398 flow. Second operand 5 states and 159 transitions. [2024-06-14 14:06:09,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 155 transitions, 1756 flow [2024-06-14 14:06:09,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 155 transitions, 1601 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:09,514 INFO L231 Difference]: Finished difference. Result has 112 places, 129 transitions, 1339 flow [2024-06-14 14:06:09,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1339, PETRI_PLACES=112, PETRI_TRANSITIONS=129} [2024-06-14 14:06:09,515 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 59 predicate places. [2024-06-14 14:06:09,515 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 129 transitions, 1339 flow [2024-06-14 14:06:09,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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 14:06:09,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:09,515 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 14:06:09,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 14:06:09,515 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:09,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:09,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1171899383, now seen corresponding path program 1 times [2024-06-14 14:06:09,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:09,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652000358] [2024-06-14 14:06:09,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:09,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:09,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:09,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652000358] [2024-06-14 14:06:09,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652000358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:09,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:09,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:09,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391894818] [2024-06-14 14:06:09,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:09,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:09,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:09,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:09,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:09,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:06:09,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 129 transitions, 1339 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 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 14:06:09,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:09,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:06:09,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:10,570 INFO L124 PetriNetUnfolderBase]: 5402/8121 cut-off events. [2024-06-14 14:06:10,570 INFO L125 PetriNetUnfolderBase]: For 87867/87990 co-relation queries the response was YES. [2024-06-14 14:06:10,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39952 conditions, 8121 events. 5402/8121 cut-off events. For 87867/87990 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 49638 event pairs, 1832 based on Foata normal form. 19/7959 useless extension candidates. Maximal degree in co-relation 39900. Up to 7236 conditions per place. [2024-06-14 14:06:10,636 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 89 selfloop transitions, 27 changer transitions 0/148 dead transitions. [2024-06-14 14:06:10,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 1651 flow [2024-06-14 14:06:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:06:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:06:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-14 14:06:10,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 14:06:10,644 INFO L175 Difference]: Start difference. First operand has 112 places, 129 transitions, 1339 flow. Second operand 4 states and 124 transitions. [2024-06-14 14:06:10,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 1651 flow [2024-06-14 14:06:10,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 148 transitions, 1536 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:10,778 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1352 flow [2024-06-14 14:06:10,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1352, PETRI_PLACES=111, PETRI_TRANSITIONS=135} [2024-06-14 14:06:10,778 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 58 predicate places. [2024-06-14 14:06:10,779 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1352 flow [2024-06-14 14:06:10,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 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 14:06:10,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:10,779 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 14:06:10,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 14:06:10,779 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:10,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:10,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2138120553, now seen corresponding path program 2 times [2024-06-14 14:06:10,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:10,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953032990] [2024-06-14 14:06:10,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:10,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:11,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:11,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953032990] [2024-06-14 14:06:11,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953032990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:11,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:11,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:11,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512939174] [2024-06-14 14:06:11,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:11,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:11,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:11,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:11,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:11,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:06:11,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 135 transitions, 1352 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:11,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:11,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:06:11,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:12,028 INFO L124 PetriNetUnfolderBase]: 5385/8157 cut-off events. [2024-06-14 14:06:12,028 INFO L125 PetriNetUnfolderBase]: For 94297/94415 co-relation queries the response was YES. [2024-06-14 14:06:12,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42233 conditions, 8157 events. 5385/8157 cut-off events. For 94297/94415 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 50339 event pairs, 1810 based on Foata normal form. 24/8017 useless extension candidates. Maximal degree in co-relation 42180. Up to 7255 conditions per place. [2024-06-14 14:06:12,089 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 109 selfloop transitions, 30 changer transitions 0/171 dead transitions. [2024-06-14 14:06:12,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 171 transitions, 1833 flow [2024-06-14 14:06:12,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:12,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:12,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-14 14:06:12,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5657142857142857 [2024-06-14 14:06:12,090 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1352 flow. Second operand 7 states and 198 transitions. [2024-06-14 14:06:12,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 171 transitions, 1833 flow [2024-06-14 14:06:12,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 171 transitions, 1742 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:12,220 INFO L231 Difference]: Finished difference. Result has 118 places, 148 transitions, 1517 flow [2024-06-14 14:06:12,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1517, PETRI_PLACES=118, PETRI_TRANSITIONS=148} [2024-06-14 14:06:12,220 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 65 predicate places. [2024-06-14 14:06:12,220 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 148 transitions, 1517 flow [2024-06-14 14:06:12,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:12,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:12,221 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 14:06:12,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 14:06:12,221 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:12,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:12,222 INFO L85 PathProgramCache]: Analyzing trace with hash -529124471, now seen corresponding path program 1 times [2024-06-14 14:06:12,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:12,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436353447] [2024-06-14 14:06:12,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:12,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:12,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:12,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436353447] [2024-06-14 14:06:12,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436353447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:12,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:12,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:12,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676320554] [2024-06-14 14:06:12,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:12,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:12,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:12,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:12,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:12,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:06:12,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 148 transitions, 1517 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:12,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:12,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:06:12,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:13,362 INFO L124 PetriNetUnfolderBase]: 5943/8855 cut-off events. [2024-06-14 14:06:13,362 INFO L125 PetriNetUnfolderBase]: For 93149/93149 co-relation queries the response was YES. [2024-06-14 14:06:13,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46565 conditions, 8855 events. 5943/8855 cut-off events. For 93149/93149 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 52458 event pairs, 1941 based on Foata normal form. 1/8853 useless extension candidates. Maximal degree in co-relation 46509. Up to 8299 conditions per place. [2024-06-14 14:06:13,426 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 157 selfloop transitions, 19 changer transitions 0/184 dead transitions. [2024-06-14 14:06:13,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 184 transitions, 2148 flow [2024-06-14 14:06:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:13,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-14 14:06:13,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576 [2024-06-14 14:06:13,427 INFO L175 Difference]: Start difference. First operand has 118 places, 148 transitions, 1517 flow. Second operand 5 states and 144 transitions. [2024-06-14 14:06:13,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 184 transitions, 2148 flow [2024-06-14 14:06:13,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 184 transitions, 2091 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:13,655 INFO L231 Difference]: Finished difference. Result has 123 places, 165 transitions, 1741 flow [2024-06-14 14:06:13,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1741, PETRI_PLACES=123, PETRI_TRANSITIONS=165} [2024-06-14 14:06:13,655 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 70 predicate places. [2024-06-14 14:06:13,655 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 165 transitions, 1741 flow [2024-06-14 14:06:13,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:13,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:13,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:13,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 14:06:13,656 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:13,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash 969411499, now seen corresponding path program 2 times [2024-06-14 14:06:13,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:13,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852861781] [2024-06-14 14:06:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:13,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:13,933 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 14:06:13,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:13,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852861781] [2024-06-14 14:06:13,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852861781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:13,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:13,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:13,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99742184] [2024-06-14 14:06:13,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:13,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:13,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:13,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:13,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:06:13,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 165 transitions, 1741 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:13,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:13,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:06:13,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:14,775 INFO L124 PetriNetUnfolderBase]: 5939/8846 cut-off events. [2024-06-14 14:06:14,775 INFO L125 PetriNetUnfolderBase]: For 102968/102968 co-relation queries the response was YES. [2024-06-14 14:06:14,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48247 conditions, 8846 events. 5939/8846 cut-off events. For 102968/102968 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 52451 event pairs, 1947 based on Foata normal form. 1/8844 useless extension candidates. Maximal degree in co-relation 48187. Up to 8295 conditions per place. [2024-06-14 14:06:14,849 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 150 selfloop transitions, 20 changer transitions 0/178 dead transitions. [2024-06-14 14:06:14,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 178 transitions, 2120 flow [2024-06-14 14:06:14,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:14,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 14:06:14,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.548 [2024-06-14 14:06:14,851 INFO L175 Difference]: Start difference. First operand has 123 places, 165 transitions, 1741 flow. Second operand 5 states and 137 transitions. [2024-06-14 14:06:14,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 178 transitions, 2120 flow [2024-06-14 14:06:15,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 178 transitions, 2056 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-14 14:06:15,165 INFO L231 Difference]: Finished difference. Result has 128 places, 166 transitions, 1733 flow [2024-06-14 14:06:15,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1733, PETRI_PLACES=128, PETRI_TRANSITIONS=166} [2024-06-14 14:06:15,166 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 75 predicate places. [2024-06-14 14:06:15,166 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 166 transitions, 1733 flow [2024-06-14 14:06:15,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:15,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:15,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:15,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 14:06:15,166 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:15,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:15,167 INFO L85 PathProgramCache]: Analyzing trace with hash 922056705, now seen corresponding path program 1 times [2024-06-14 14:06:15,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:15,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073739219] [2024-06-14 14:06:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:15,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:15,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:15,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073739219] [2024-06-14 14:06:15,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073739219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:15,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:15,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:15,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513204332] [2024-06-14 14:06:15,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:15,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:15,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:15,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:15,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:06:15,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 166 transitions, 1733 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 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 14:06:15,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:15,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:06:15,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:16,323 INFO L124 PetriNetUnfolderBase]: 5419/8225 cut-off events. [2024-06-14 14:06:16,323 INFO L125 PetriNetUnfolderBase]: For 107735/107740 co-relation queries the response was YES. [2024-06-14 14:06:16,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44962 conditions, 8225 events. 5419/8225 cut-off events. For 107735/107740 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 50363 event pairs, 1875 based on Foata normal form. 9/8095 useless extension candidates. Maximal degree in co-relation 44899. Up to 7271 conditions per place. [2024-06-14 14:06:16,394 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 127 selfloop transitions, 18 changer transitions 0/182 dead transitions. [2024-06-14 14:06:16,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 182 transitions, 2081 flow [2024-06-14 14:06:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-14 14:06:16,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572 [2024-06-14 14:06:16,396 INFO L175 Difference]: Start difference. First operand has 128 places, 166 transitions, 1733 flow. Second operand 5 states and 143 transitions. [2024-06-14 14:06:16,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 182 transitions, 2081 flow [2024-06-14 14:06:16,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 182 transitions, 2046 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-14 14:06:16,661 INFO L231 Difference]: Finished difference. Result has 132 places, 169 transitions, 1773 flow [2024-06-14 14:06:16,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1773, PETRI_PLACES=132, PETRI_TRANSITIONS=169} [2024-06-14 14:06:16,661 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 79 predicate places. [2024-06-14 14:06:16,661 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 169 transitions, 1773 flow [2024-06-14 14:06:16,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 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 14:06:16,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:16,662 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 14:06:16,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 14:06:16,662 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:16,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:16,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1095477370, now seen corresponding path program 1 times [2024-06-14 14:06:16,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:16,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422754473] [2024-06-14 14:06:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:16,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:16,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:16,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422754473] [2024-06-14 14:06:16,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422754473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:16,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:16,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:16,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908385098] [2024-06-14 14:06:16,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:16,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:16,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:16,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:16,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:17,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:17,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 169 transitions, 1773 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:17,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:17,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:17,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:17,938 INFO L124 PetriNetUnfolderBase]: 5639/8510 cut-off events. [2024-06-14 14:06:17,938 INFO L125 PetriNetUnfolderBase]: For 114538/114548 co-relation queries the response was YES. [2024-06-14 14:06:17,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47637 conditions, 8510 events. 5639/8510 cut-off events. For 114538/114548 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 51340 event pairs, 1938 based on Foata normal form. 11/8467 useless extension candidates. Maximal degree in co-relation 47572. Up to 7745 conditions per place. [2024-06-14 14:06:18,004 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 146 selfloop transitions, 26 changer transitions 0/192 dead transitions. [2024-06-14 14:06:18,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 192 transitions, 2268 flow [2024-06-14 14:06:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-14 14:06:18,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572 [2024-06-14 14:06:18,005 INFO L175 Difference]: Start difference. First operand has 132 places, 169 transitions, 1773 flow. Second operand 5 states and 143 transitions. [2024-06-14 14:06:18,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 192 transitions, 2268 flow [2024-06-14 14:06:18,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 192 transitions, 2219 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:18,300 INFO L231 Difference]: Finished difference. Result has 136 places, 180 transitions, 1949 flow [2024-06-14 14:06:18,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1724, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1949, PETRI_PLACES=136, PETRI_TRANSITIONS=180} [2024-06-14 14:06:18,301 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 83 predicate places. [2024-06-14 14:06:18,301 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 180 transitions, 1949 flow [2024-06-14 14:06:18,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:18,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:18,301 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, 1] [2024-06-14 14:06:18,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 14:06:18,302 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:18,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:18,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1873269912, now seen corresponding path program 1 times [2024-06-14 14:06:18,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:18,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703402619] [2024-06-14 14:06:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:18,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:18,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:18,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703402619] [2024-06-14 14:06:18,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703402619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:18,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:18,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:18,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448539558] [2024-06-14 14:06:18,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:18,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:18,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:18,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:18,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:18,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:18,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 180 transitions, 1949 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:18,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:18,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:18,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:20,049 INFO L124 PetriNetUnfolderBase]: 6498/9984 cut-off events. [2024-06-14 14:06:20,050 INFO L125 PetriNetUnfolderBase]: For 173619/174242 co-relation queries the response was YES. [2024-06-14 14:06:20,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60165 conditions, 9984 events. 6498/9984 cut-off events. For 173619/174242 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 64470 event pairs, 1268 based on Foata normal form. 152/9951 useless extension candidates. Maximal degree in co-relation 60097. Up to 5151 conditions per place. [2024-06-14 14:06:20,155 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 159 selfloop transitions, 70 changer transitions 0/244 dead transitions. [2024-06-14 14:06:20,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 244 transitions, 2927 flow [2024-06-14 14:06:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:20,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-06-14 14:06:20,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-14 14:06:20,157 INFO L175 Difference]: Start difference. First operand has 136 places, 180 transitions, 1949 flow. Second operand 7 states and 230 transitions. [2024-06-14 14:06:20,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 244 transitions, 2927 flow [2024-06-14 14:06:20,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 244 transitions, 2869 flow, removed 29 selfloop flow, removed 0 redundant places. [2024-06-14 14:06:20,627 INFO L231 Difference]: Finished difference. Result has 144 places, 185 transitions, 2173 flow [2024-06-14 14:06:20,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1891, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2173, PETRI_PLACES=144, PETRI_TRANSITIONS=185} [2024-06-14 14:06:20,628 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 91 predicate places. [2024-06-14 14:06:20,628 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 185 transitions, 2173 flow [2024-06-14 14:06:20,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:20,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:20,628 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 14:06:20,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 14:06:20,629 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:20,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:20,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1103375876, now seen corresponding path program 2 times [2024-06-14 14:06:20,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:20,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640737691] [2024-06-14 14:06:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:20,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:20,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:20,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640737691] [2024-06-14 14:06:20,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640737691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:20,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:20,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:20,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371121334] [2024-06-14 14:06:20,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:20,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:20,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:20,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:20,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:21,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:21,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 185 transitions, 2173 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:21,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:21,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:21,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:22,189 INFO L124 PetriNetUnfolderBase]: 6392/9853 cut-off events. [2024-06-14 14:06:22,189 INFO L125 PetriNetUnfolderBase]: For 177865/178409 co-relation queries the response was YES. [2024-06-14 14:06:22,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60729 conditions, 9853 events. 6392/9853 cut-off events. For 177865/178409 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 63452 event pairs, 1601 based on Foata normal form. 51/9715 useless extension candidates. Maximal degree in co-relation 60657. Up to 8191 conditions per place. [2024-06-14 14:06:22,285 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 175 selfloop transitions, 33 changer transitions 0/223 dead transitions. [2024-06-14 14:06:22,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 223 transitions, 2757 flow [2024-06-14 14:06:22,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:22,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-14 14:06:22,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-14 14:06:22,287 INFO L175 Difference]: Start difference. First operand has 144 places, 185 transitions, 2173 flow. Second operand 6 states and 185 transitions. [2024-06-14 14:06:22,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 223 transitions, 2757 flow [2024-06-14 14:06:22,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 223 transitions, 2677 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:22,791 INFO L231 Difference]: Finished difference. Result has 148 places, 185 transitions, 2165 flow [2024-06-14 14:06:22,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2165, PETRI_PLACES=148, PETRI_TRANSITIONS=185} [2024-06-14 14:06:22,792 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 95 predicate places. [2024-06-14 14:06:22,792 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 185 transitions, 2165 flow [2024-06-14 14:06:22,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:22,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:22,792 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 14:06:22,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 14:06:22,792 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:22,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:22,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1220063222, now seen corresponding path program 3 times [2024-06-14 14:06:22,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:22,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753753806] [2024-06-14 14:06:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:22,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:23,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:23,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753753806] [2024-06-14 14:06:23,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753753806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:23,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:23,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:23,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874369143] [2024-06-14 14:06:23,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:23,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:23,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:23,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:23,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:23,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:23,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 185 transitions, 2165 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:23,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:23,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:23,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:24,379 INFO L124 PetriNetUnfolderBase]: 6695/10254 cut-off events. [2024-06-14 14:06:24,379 INFO L125 PetriNetUnfolderBase]: For 200845/201427 co-relation queries the response was YES. [2024-06-14 14:06:24,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63751 conditions, 10254 events. 6695/10254 cut-off events. For 200845/201427 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 66412 event pairs, 1958 based on Foata normal form. 151/10187 useless extension candidates. Maximal degree in co-relation 63677. Up to 6708 conditions per place. [2024-06-14 14:06:24,480 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 153 selfloop transitions, 63 changer transitions 0/231 dead transitions. [2024-06-14 14:06:24,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 231 transitions, 2926 flow [2024-06-14 14:06:24,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:24,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-14 14:06:24,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-14 14:06:24,482 INFO L175 Difference]: Start difference. First operand has 148 places, 185 transitions, 2165 flow. Second operand 6 states and 196 transitions. [2024-06-14 14:06:24,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 231 transitions, 2926 flow [2024-06-14 14:06:24,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 231 transitions, 2852 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:24,950 INFO L231 Difference]: Finished difference. Result has 150 places, 186 transitions, 2255 flow [2024-06-14 14:06:24,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2255, PETRI_PLACES=150, PETRI_TRANSITIONS=186} [2024-06-14 14:06:24,950 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 97 predicate places. [2024-06-14 14:06:24,950 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 186 transitions, 2255 flow [2024-06-14 14:06:24,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:24,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:24,951 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 14:06:24,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 14:06:24,951 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:24,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:24,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1645019644, now seen corresponding path program 4 times [2024-06-14 14:06:24,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:24,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649192058] [2024-06-14 14:06:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:24,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:25,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:25,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649192058] [2024-06-14 14:06:25,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649192058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:25,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:25,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:25,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880746248] [2024-06-14 14:06:25,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:25,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:25,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:25,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:25,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:25,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:25,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 186 transitions, 2255 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:25,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:25,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:25,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:26,535 INFO L124 PetriNetUnfolderBase]: 6500/10003 cut-off events. [2024-06-14 14:06:26,536 INFO L125 PetriNetUnfolderBase]: For 197734/198279 co-relation queries the response was YES. [2024-06-14 14:06:26,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61577 conditions, 10003 events. 6500/10003 cut-off events. For 197734/198279 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 64850 event pairs, 2177 based on Foata normal form. 154/9949 useless extension candidates. Maximal degree in co-relation 61502. Up to 8180 conditions per place. [2024-06-14 14:06:26,637 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 150 selfloop transitions, 55 changer transitions 0/220 dead transitions. [2024-06-14 14:06:26,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 220 transitions, 2817 flow [2024-06-14 14:06:26,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-14 14:06:26,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233333333333333 [2024-06-14 14:06:26,638 INFO L175 Difference]: Start difference. First operand has 150 places, 186 transitions, 2255 flow. Second operand 6 states and 187 transitions. [2024-06-14 14:06:26,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 220 transitions, 2817 flow [2024-06-14 14:06:27,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 220 transitions, 2661 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:27,201 INFO L231 Difference]: Finished difference. Result has 151 places, 186 transitions, 2221 flow [2024-06-14 14:06:27,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2221, PETRI_PLACES=151, PETRI_TRANSITIONS=186} [2024-06-14 14:06:27,201 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 98 predicate places. [2024-06-14 14:06:27,201 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 186 transitions, 2221 flow [2024-06-14 14:06:27,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:27,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:27,202 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 14:06:27,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 14:06:27,202 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:27,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:27,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1344305576, now seen corresponding path program 5 times [2024-06-14 14:06:27,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:27,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230054774] [2024-06-14 14:06:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:27,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:27,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:27,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230054774] [2024-06-14 14:06:27,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230054774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:27,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:27,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:27,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292295107] [2024-06-14 14:06:27,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:27,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:27,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:27,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:27,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:27,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:27,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 186 transitions, 2221 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:27,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:27,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:27,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:28,992 INFO L124 PetriNetUnfolderBase]: 7249/11152 cut-off events. [2024-06-14 14:06:28,992 INFO L125 PetriNetUnfolderBase]: For 219342/219958 co-relation queries the response was YES. [2024-06-14 14:06:29,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68574 conditions, 11152 events. 7249/11152 cut-off events. For 219342/219958 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 74155 event pairs, 2372 based on Foata normal form. 186/11121 useless extension candidates. Maximal degree in co-relation 68499. Up to 8680 conditions per place. [2024-06-14 14:06:29,113 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 155 selfloop transitions, 68 changer transitions 0/238 dead transitions. [2024-06-14 14:06:29,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 238 transitions, 3021 flow [2024-06-14 14:06:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:29,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-14 14:06:29,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314285714285715 [2024-06-14 14:06:29,114 INFO L175 Difference]: Start difference. First operand has 151 places, 186 transitions, 2221 flow. Second operand 7 states and 221 transitions. [2024-06-14 14:06:29,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 238 transitions, 3021 flow [2024-06-14 14:06:29,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 238 transitions, 2878 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:29,661 INFO L231 Difference]: Finished difference. Result has 152 places, 188 transitions, 2282 flow [2024-06-14 14:06:29,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2282, PETRI_PLACES=152, PETRI_TRANSITIONS=188} [2024-06-14 14:06:29,662 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 99 predicate places. [2024-06-14 14:06:29,662 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 188 transitions, 2282 flow [2024-06-14 14:06:29,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:29,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:29,663 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 14:06:29,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 14:06:29,663 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:29,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1336687016, now seen corresponding path program 6 times [2024-06-14 14:06:29,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:29,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572981960] [2024-06-14 14:06:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:29,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:29,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572981960] [2024-06-14 14:06:29,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572981960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:29,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:29,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:29,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338142089] [2024-06-14 14:06:29,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:29,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:29,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:29,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:29,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:30,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:30,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 188 transitions, 2282 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:30,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:30,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:30,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:31,426 INFO L124 PetriNetUnfolderBase]: 7642/11729 cut-off events. [2024-06-14 14:06:31,427 INFO L125 PetriNetUnfolderBase]: For 231841/232436 co-relation queries the response was YES. [2024-06-14 14:06:31,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72147 conditions, 11729 events. 7642/11729 cut-off events. For 231841/232436 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 78654 event pairs, 2604 based on Foata normal form. 142/11634 useless extension candidates. Maximal degree in co-relation 72072. Up to 10002 conditions per place. [2024-06-14 14:06:31,536 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 147 selfloop transitions, 66 changer transitions 0/228 dead transitions. [2024-06-14 14:06:31,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 228 transitions, 2884 flow [2024-06-14 14:06:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:31,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:31,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-14 14:06:31,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057142857142858 [2024-06-14 14:06:31,537 INFO L175 Difference]: Start difference. First operand has 152 places, 188 transitions, 2282 flow. Second operand 7 states and 212 transitions. [2024-06-14 14:06:31,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 228 transitions, 2884 flow [2024-06-14 14:06:32,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 228 transitions, 2782 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:32,065 INFO L231 Difference]: Finished difference. Result has 156 places, 189 transitions, 2352 flow [2024-06-14 14:06:32,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2352, PETRI_PLACES=156, PETRI_TRANSITIONS=189} [2024-06-14 14:06:32,066 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 103 predicate places. [2024-06-14 14:06:32,066 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 189 transitions, 2352 flow [2024-06-14 14:06:32,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:32,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:32,066 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 14:06:32,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 14:06:32,066 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:32,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:32,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1078399046, now seen corresponding path program 7 times [2024-06-14 14:06:32,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:32,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330868135] [2024-06-14 14:06:32,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:32,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:32,353 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 14:06:32,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:32,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330868135] [2024-06-14 14:06:32,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330868135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:32,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:32,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:32,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698733910] [2024-06-14 14:06:32,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:32,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:32,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:32,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:32,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:32,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:32,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 189 transitions, 2352 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:32,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:32,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:32,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:33,928 INFO L124 PetriNetUnfolderBase]: 7925/12154 cut-off events. [2024-06-14 14:06:33,928 INFO L125 PetriNetUnfolderBase]: For 240016/240587 co-relation queries the response was YES. [2024-06-14 14:06:33,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74455 conditions, 12154 events. 7925/12154 cut-off events. For 240016/240587 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 82008 event pairs, 2704 based on Foata normal form. 142/12069 useless extension candidates. Maximal degree in co-relation 74378. Up to 10435 conditions per place. [2024-06-14 14:06:34,028 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 145 selfloop transitions, 67 changer transitions 0/227 dead transitions. [2024-06-14 14:06:34,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 227 transitions, 2952 flow [2024-06-14 14:06:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:34,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:34,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-14 14:06:34,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:06:34,029 INFO L175 Difference]: Start difference. First operand has 156 places, 189 transitions, 2352 flow. Second operand 7 states and 210 transitions. [2024-06-14 14:06:34,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 227 transitions, 2952 flow [2024-06-14 14:06:34,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 227 transitions, 2816 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:34,581 INFO L231 Difference]: Finished difference. Result has 158 places, 190 transitions, 2386 flow [2024-06-14 14:06:34,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2216, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2386, PETRI_PLACES=158, PETRI_TRANSITIONS=190} [2024-06-14 14:06:34,582 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 105 predicate places. [2024-06-14 14:06:34,582 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 190 transitions, 2386 flow [2024-06-14 14:06:34,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:34,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:34,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:34,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 14:06:34,583 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:34,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:34,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1576738392, now seen corresponding path program 8 times [2024-06-14 14:06:34,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:34,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425611975] [2024-06-14 14:06:34,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:34,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:34,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:34,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:34,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425611975] [2024-06-14 14:06:34,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425611975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:34,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:34,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:34,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88927780] [2024-06-14 14:06:34,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:34,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:34,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:34,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:34,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:34,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:34,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 190 transitions, 2386 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:34,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:34,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:34,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:36,271 INFO L124 PetriNetUnfolderBase]: 7788/11909 cut-off events. [2024-06-14 14:06:36,272 INFO L125 PetriNetUnfolderBase]: For 234293/234865 co-relation queries the response was YES. [2024-06-14 14:06:36,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71946 conditions, 11909 events. 7788/11909 cut-off events. For 234293/234865 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 79905 event pairs, 2571 based on Foata normal form. 78/11745 useless extension candidates. Maximal degree in co-relation 71868. Up to 10092 conditions per place. [2024-06-14 14:06:36,390 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 158 selfloop transitions, 55 changer transitions 0/228 dead transitions. [2024-06-14 14:06:36,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 228 transitions, 2956 flow [2024-06-14 14:06:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:36,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:36,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-14 14:06:36,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2024-06-14 14:06:36,391 INFO L175 Difference]: Start difference. First operand has 158 places, 190 transitions, 2386 flow. Second operand 6 states and 191 transitions. [2024-06-14 14:06:36,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 228 transitions, 2956 flow [2024-06-14 14:06:37,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 228 transitions, 2810 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:37,029 INFO L231 Difference]: Finished difference. Result has 159 places, 190 transitions, 2362 flow [2024-06-14 14:06:37,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2362, PETRI_PLACES=159, PETRI_TRANSITIONS=190} [2024-06-14 14:06:37,029 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 106 predicate places. [2024-06-14 14:06:37,029 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 190 transitions, 2362 flow [2024-06-14 14:06:37,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:37,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:37,030 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 14:06:37,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 14:06:37,030 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:37,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:37,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1219620960, now seen corresponding path program 1 times [2024-06-14 14:06:37,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:37,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087413320] [2024-06-14 14:06:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:37,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:37,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:37,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087413320] [2024-06-14 14:06:37,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087413320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:37,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:37,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:37,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431199656] [2024-06-14 14:06:37,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:37,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:37,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:37,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:37,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:37,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:37,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 190 transitions, 2362 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:37,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:37,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:37,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:38,851 INFO L124 PetriNetUnfolderBase]: 8279/12754 cut-off events. [2024-06-14 14:06:38,851 INFO L125 PetriNetUnfolderBase]: For 254500/255080 co-relation queries the response was YES. [2024-06-14 14:06:38,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77212 conditions, 12754 events. 8279/12754 cut-off events. For 254500/255080 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 86982 event pairs, 2393 based on Foata normal form. 107/12608 useless extension candidates. Maximal degree in co-relation 77133. Up to 6224 conditions per place. [2024-06-14 14:06:38,982 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 151 selfloop transitions, 82 changer transitions 0/248 dead transitions. [2024-06-14 14:06:38,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 248 transitions, 3248 flow [2024-06-14 14:06:38,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:38,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-06-14 14:06:38,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-14 14:06:38,984 INFO L175 Difference]: Start difference. First operand has 159 places, 190 transitions, 2362 flow. Second operand 7 states and 225 transitions. [2024-06-14 14:06:38,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 248 transitions, 3248 flow [2024-06-14 14:06:39,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 248 transitions, 3126 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:39,832 INFO L231 Difference]: Finished difference. Result has 161 places, 192 transitions, 2472 flow [2024-06-14 14:06:39,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2472, PETRI_PLACES=161, PETRI_TRANSITIONS=192} [2024-06-14 14:06:39,833 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 108 predicate places. [2024-06-14 14:06:39,833 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 192 transitions, 2472 flow [2024-06-14 14:06:39,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:39,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:39,833 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 14:06:39,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 14:06:39,834 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:39,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:39,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1219352190, now seen corresponding path program 2 times [2024-06-14 14:06:39,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:39,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370728317] [2024-06-14 14:06:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:39,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:40,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:40,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370728317] [2024-06-14 14:06:40,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370728317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:40,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:40,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:40,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126403630] [2024-06-14 14:06:40,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:40,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:40,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:40,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:40,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:40,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:40,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 192 transitions, 2472 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:40,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:40,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:40,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:42,009 INFO L124 PetriNetUnfolderBase]: 8448/13021 cut-off events. [2024-06-14 14:06:42,009 INFO L125 PetriNetUnfolderBase]: For 274194/274888 co-relation queries the response was YES. [2024-06-14 14:06:42,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79799 conditions, 13021 events. 8448/13021 cut-off events. For 274194/274888 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 89347 event pairs, 2371 based on Foata normal form. 128/12878 useless extension candidates. Maximal degree in co-relation 79719. Up to 6246 conditions per place. [2024-06-14 14:06:42,154 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 149 selfloop transitions, 83 changer transitions 0/247 dead transitions. [2024-06-14 14:06:42,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 247 transitions, 3336 flow [2024-06-14 14:06:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:42,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-14 14:06:42,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371428571428571 [2024-06-14 14:06:42,155 INFO L175 Difference]: Start difference. First operand has 161 places, 192 transitions, 2472 flow. Second operand 7 states and 223 transitions. [2024-06-14 14:06:42,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 247 transitions, 3336 flow [2024-06-14 14:06:43,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 247 transitions, 3144 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:43,008 INFO L231 Difference]: Finished difference. Result has 164 places, 193 transitions, 2484 flow [2024-06-14 14:06:43,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2288, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2484, PETRI_PLACES=164, PETRI_TRANSITIONS=193} [2024-06-14 14:06:43,009 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 111 predicate places. [2024-06-14 14:06:43,009 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 193 transitions, 2484 flow [2024-06-14 14:06:43,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:43,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:43,009 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 14:06:43,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 14:06:43,010 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:43,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:43,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1078214596, now seen corresponding path program 3 times [2024-06-14 14:06:43,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:43,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48521565] [2024-06-14 14:06:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:43,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:43,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:43,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48521565] [2024-06-14 14:06:43,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48521565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:43,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:43,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:43,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184499513] [2024-06-14 14:06:43,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:43,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:43,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:43,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:43,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:43,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:43,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 193 transitions, 2484 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:43,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:43,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:43,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:44,903 INFO L124 PetriNetUnfolderBase]: 8642/13457 cut-off events. [2024-06-14 14:06:44,903 INFO L125 PetriNetUnfolderBase]: For 288188/288690 co-relation queries the response was YES. [2024-06-14 14:06:44,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81813 conditions, 13457 events. 8642/13457 cut-off events. For 288188/288690 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 94548 event pairs, 3008 based on Foata normal form. 119/13283 useless extension candidates. Maximal degree in co-relation 81732. Up to 10079 conditions per place. [2024-06-14 14:06:45,037 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 152 selfloop transitions, 71 changer transitions 0/238 dead transitions. [2024-06-14 14:06:45,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 238 transitions, 3170 flow [2024-06-14 14:06:45,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-14 14:06:45,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-14 14:06:45,039 INFO L175 Difference]: Start difference. First operand has 164 places, 193 transitions, 2484 flow. Second operand 7 states and 215 transitions. [2024-06-14 14:06:45,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 238 transitions, 3170 flow [2024-06-14 14:06:45,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 238 transitions, 3038 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:45,868 INFO L231 Difference]: Finished difference. Result has 167 places, 194 transitions, 2528 flow [2024-06-14 14:06:45,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2353, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2528, PETRI_PLACES=167, PETRI_TRANSITIONS=194} [2024-06-14 14:06:45,868 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 114 predicate places. [2024-06-14 14:06:45,868 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 194 transitions, 2528 flow [2024-06-14 14:06:45,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:45,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:45,868 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 14:06:45,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 14:06:45,869 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:45,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:45,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1576922842, now seen corresponding path program 4 times [2024-06-14 14:06:45,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:45,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611863858] [2024-06-14 14:06:45,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:45,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:46,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:46,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611863858] [2024-06-14 14:06:46,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611863858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:46,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:46,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:46,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940932017] [2024-06-14 14:06:46,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:46,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:46,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:46,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:46,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:46,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:06:46,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 194 transitions, 2528 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:46,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:46,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:06:46,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:47,739 INFO L124 PetriNetUnfolderBase]: 8597/13254 cut-off events. [2024-06-14 14:06:47,739 INFO L125 PetriNetUnfolderBase]: For 282436/283108 co-relation queries the response was YES. [2024-06-14 14:06:47,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79554 conditions, 13254 events. 8597/13254 cut-off events. For 282436/283108 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 91343 event pairs, 2427 based on Foata normal form. 89/13014 useless extension candidates. Maximal degree in co-relation 79472. Up to 9807 conditions per place. [2024-06-14 14:06:47,884 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 160 selfloop transitions, 64 changer transitions 0/239 dead transitions. [2024-06-14 14:06:47,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 239 transitions, 3184 flow [2024-06-14 14:06:47,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-14 14:06:47,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-14 14:06:47,885 INFO L175 Difference]: Start difference. First operand has 167 places, 194 transitions, 2528 flow. Second operand 6 states and 196 transitions. [2024-06-14 14:06:47,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 239 transitions, 3184 flow [2024-06-14 14:06:48,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 239 transitions, 3030 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:48,702 INFO L231 Difference]: Finished difference. Result has 168 places, 194 transitions, 2511 flow [2024-06-14 14:06:48,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2511, PETRI_PLACES=168, PETRI_TRANSITIONS=194} [2024-06-14 14:06:48,702 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 115 predicate places. [2024-06-14 14:06:48,702 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 194 transitions, 2511 flow [2024-06-14 14:06:48,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:48,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:48,703 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] [2024-06-14 14:06:48,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 14:06:48,703 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:48,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:48,703 INFO L85 PathProgramCache]: Analyzing trace with hash -924326040, now seen corresponding path program 1 times [2024-06-14 14:06:48,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:48,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490566677] [2024-06-14 14:06:48,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:48,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:49,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:49,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490566677] [2024-06-14 14:06:49,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490566677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:49,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:49,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:49,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544379282] [2024-06-14 14:06:49,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:49,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:49,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:49,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:49,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:49,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:06:49,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 194 transitions, 2511 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:06:49,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:49,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:06:49,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:50,638 INFO L124 PetriNetUnfolderBase]: 9585/14478 cut-off events. [2024-06-14 14:06:50,639 INFO L125 PetriNetUnfolderBase]: For 256923/256930 co-relation queries the response was YES. [2024-06-14 14:06:50,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84172 conditions, 14478 events. 9585/14478 cut-off events. For 256923/256930 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 96953 event pairs, 3627 based on Foata normal form. 7/14482 useless extension candidates. Maximal degree in co-relation 84089. Up to 13575 conditions per place. [2024-06-14 14:06:50,790 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 180 selfloop transitions, 39 changer transitions 0/227 dead transitions. [2024-06-14 14:06:50,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 227 transitions, 3223 flow [2024-06-14 14:06:50,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:50,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:50,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 14:06:50,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-14 14:06:50,791 INFO L175 Difference]: Start difference. First operand has 168 places, 194 transitions, 2511 flow. Second operand 7 states and 189 transitions. [2024-06-14 14:06:50,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 227 transitions, 3223 flow [2024-06-14 14:06:51,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 227 transitions, 3047 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:51,624 INFO L231 Difference]: Finished difference. Result has 170 places, 206 transitions, 2605 flow [2024-06-14 14:06:51,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2335, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2605, PETRI_PLACES=170, PETRI_TRANSITIONS=206} [2024-06-14 14:06:51,624 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 117 predicate places. [2024-06-14 14:06:51,625 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 206 transitions, 2605 flow [2024-06-14 14:06:51,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:06:51,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:51,625 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 14:06:51,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 14:06:51,625 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:51,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:51,625 INFO L85 PathProgramCache]: Analyzing trace with hash -913850520, now seen corresponding path program 2 times [2024-06-14 14:06:51,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:51,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332485222] [2024-06-14 14:06:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:51,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:51,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:51,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332485222] [2024-06-14 14:06:51,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332485222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:51,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:51,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:51,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649443932] [2024-06-14 14:06:51,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:51,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:51,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:51,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:51,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:51,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:06:51,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 206 transitions, 2605 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:06:51,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:51,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:06:51,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:53,630 INFO L124 PetriNetUnfolderBase]: 9581/14453 cut-off events. [2024-06-14 14:06:53,630 INFO L125 PetriNetUnfolderBase]: For 264763/264780 co-relation queries the response was YES. [2024-06-14 14:06:53,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84940 conditions, 14453 events. 9581/14453 cut-off events. For 264763/264780 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 96752 event pairs, 3556 based on Foata normal form. 17/14465 useless extension candidates. Maximal degree in co-relation 84855. Up to 13571 conditions per place. [2024-06-14 14:06:53,763 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 173 selfloop transitions, 37 changer transitions 0/218 dead transitions. [2024-06-14 14:06:53,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 218 transitions, 3055 flow [2024-06-14 14:06:53,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-14 14:06:53,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-14 14:06:53,764 INFO L175 Difference]: Start difference. First operand has 170 places, 206 transitions, 2605 flow. Second operand 5 states and 140 transitions. [2024-06-14 14:06:53,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 218 transitions, 3055 flow [2024-06-14 14:06:54,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 218 transitions, 2930 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:54,476 INFO L231 Difference]: Finished difference. Result has 173 places, 206 transitions, 2566 flow [2024-06-14 14:06:54,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2480, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2566, PETRI_PLACES=173, PETRI_TRANSITIONS=206} [2024-06-14 14:06:54,476 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 120 predicate places. [2024-06-14 14:06:54,476 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 206 transitions, 2566 flow [2024-06-14 14:06:54,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:06:54,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:54,477 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 14:06:54,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 14:06:54,477 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:54,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:54,477 INFO L85 PathProgramCache]: Analyzing trace with hash 526855136, now seen corresponding path program 1 times [2024-06-14 14:06:54,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:54,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530842851] [2024-06-14 14:06:54,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:54,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:54,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:54,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530842851] [2024-06-14 14:06:54,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530842851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:54,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:54,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:54,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800266142] [2024-06-14 14:06:54,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:54,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:54,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:54,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:54,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:54,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:06:54,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 206 transitions, 2566 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:54,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:54,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:06:54,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:56,417 INFO L124 PetriNetUnfolderBase]: 9249/13932 cut-off events. [2024-06-14 14:06:56,417 INFO L125 PetriNetUnfolderBase]: For 310762/310890 co-relation queries the response was YES. [2024-06-14 14:06:56,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83472 conditions, 13932 events. 9249/13932 cut-off events. For 310762/310890 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 94052 event pairs, 3350 based on Foata normal form. 85/13554 useless extension candidates. Maximal degree in co-relation 83386. Up to 12410 conditions per place. [2024-06-14 14:06:56,571 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 132 selfloop transitions, 52 changer transitions 0/227 dead transitions. [2024-06-14 14:06:56,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 227 transitions, 3050 flow [2024-06-14 14:06:56,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:56,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:56,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-14 14:06:56,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608 [2024-06-14 14:06:56,572 INFO L175 Difference]: Start difference. First operand has 173 places, 206 transitions, 2566 flow. Second operand 5 states and 152 transitions. [2024-06-14 14:06:56,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 227 transitions, 3050 flow [2024-06-14 14:06:57,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 227 transitions, 2969 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:57,246 INFO L231 Difference]: Finished difference. Result has 173 places, 209 transitions, 2649 flow [2024-06-14 14:06:57,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2485, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2649, PETRI_PLACES=173, PETRI_TRANSITIONS=209} [2024-06-14 14:06:57,248 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 120 predicate places. [2024-06-14 14:06:57,248 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 209 transitions, 2649 flow [2024-06-14 14:06:57,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:57,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:57,248 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 14:06:57,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 14:06:57,248 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:57,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:57,249 INFO L85 PathProgramCache]: Analyzing trace with hash 643523272, now seen corresponding path program 3 times [2024-06-14 14:06:57,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:57,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733849373] [2024-06-14 14:06:57,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:57,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:57,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:57,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733849373] [2024-06-14 14:06:57,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733849373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:57,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:57,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:57,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428845306] [2024-06-14 14:06:57,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:57,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:57,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:57,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:57,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:57,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:06:57,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 209 transitions, 2649 flow. Second operand has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:57,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:57,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:06:57,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:59,314 INFO L124 PetriNetUnfolderBase]: 9916/14956 cut-off events. [2024-06-14 14:06:59,314 INFO L125 PetriNetUnfolderBase]: For 276140/276140 co-relation queries the response was YES. [2024-06-14 14:06:59,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89471 conditions, 14956 events. 9916/14956 cut-off events. For 276140/276140 co-relation queries the response was YES. Maximal size of possible extension queue 845. Compared 100554 event pairs, 3599 based on Foata normal form. 1/14954 useless extension candidates. Maximal degree in co-relation 89385. Up to 14020 conditions per place. [2024-06-14 14:06:59,480 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 200 selfloop transitions, 51 changer transitions 0/259 dead transitions. [2024-06-14 14:06:59,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 259 transitions, 3487 flow [2024-06-14 14:06:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-14 14:06:59,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-14 14:06:59,481 INFO L175 Difference]: Start difference. First operand has 173 places, 209 transitions, 2649 flow. Second operand 9 states and 245 transitions. [2024-06-14 14:06:59,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 259 transitions, 3487 flow [2024-06-14 14:07:00,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 259 transitions, 3379 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:00,396 INFO L231 Difference]: Finished difference. Result has 180 places, 221 transitions, 2851 flow [2024-06-14 14:07:00,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2851, PETRI_PLACES=180, PETRI_TRANSITIONS=221} [2024-06-14 14:07:00,396 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 127 predicate places. [2024-06-14 14:07:00,396 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 221 transitions, 2851 flow [2024-06-14 14:07:00,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:00,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:00,397 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] [2024-06-14 14:07:00,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 14:07:00,397 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:07:00,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:00,397 INFO L85 PathProgramCache]: Analyzing trace with hash 732497176, now seen corresponding path program 4 times [2024-06-14 14:07:00,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:00,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806682169] [2024-06-14 14:07:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:00,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:00,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:00,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806682169] [2024-06-14 14:07:00,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806682169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:00,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:00,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:00,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874829794] [2024-06-14 14:07:00,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:00,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:00,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:00,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:00,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:00,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:07:00,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 221 transitions, 2851 flow. Second operand has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:00,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:00,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:07:00,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:02,544 INFO L124 PetriNetUnfolderBase]: 9923/14943 cut-off events. [2024-06-14 14:07:02,545 INFO L125 PetriNetUnfolderBase]: For 278961/278961 co-relation queries the response was YES. [2024-06-14 14:07:02,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89487 conditions, 14943 events. 9923/14943 cut-off events. For 278961/278961 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 100073 event pairs, 3605 based on Foata normal form. 1/14941 useless extension candidates. Maximal degree in co-relation 89399. Up to 14028 conditions per place. [2024-06-14 14:07:02,690 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 188 selfloop transitions, 55 changer transitions 0/251 dead transitions. [2024-06-14 14:07:02,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 251 transitions, 3539 flow [2024-06-14 14:07:02,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:02,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-14 14:07:02,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177777777777778 [2024-06-14 14:07:02,692 INFO L175 Difference]: Start difference. First operand has 180 places, 221 transitions, 2851 flow. Second operand 9 states and 233 transitions. [2024-06-14 14:07:02,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 251 transitions, 3539 flow [2024-06-14 14:07:03,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 251 transitions, 3386 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:03,390 INFO L231 Difference]: Finished difference. Result has 185 places, 225 transitions, 2887 flow [2024-06-14 14:07:03,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2706, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2887, PETRI_PLACES=185, PETRI_TRANSITIONS=225} [2024-06-14 14:07:03,390 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 132 predicate places. [2024-06-14 14:07:03,390 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 225 transitions, 2887 flow [2024-06-14 14:07:03,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:03,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:03,391 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 14:07:03,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 14:07:03,391 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:07:03,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:03,391 INFO L85 PathProgramCache]: Analyzing trace with hash -211130456, now seen corresponding path program 5 times [2024-06-14 14:07:03,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:03,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072754705] [2024-06-14 14:07:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:03,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:03,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:03,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072754705] [2024-06-14 14:07:03,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072754705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:03,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:03,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:03,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815594426] [2024-06-14 14:07:03,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:03,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:03,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:03,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:03,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:07:03,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 225 transitions, 2887 flow. Second operand has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:03,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:03,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:07:03,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:05,458 INFO L124 PetriNetUnfolderBase]: 9919/14934 cut-off events. [2024-06-14 14:07:05,459 INFO L125 PetriNetUnfolderBase]: For 278810/278810 co-relation queries the response was YES. [2024-06-14 14:07:05,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88141 conditions, 14934 events. 9919/14934 cut-off events. For 278810/278810 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 100177 event pairs, 3601 based on Foata normal form. 1/14932 useless extension candidates. Maximal degree in co-relation 88052. Up to 14024 conditions per place. [2024-06-14 14:07:05,626 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 188 selfloop transitions, 53 changer transitions 0/249 dead transitions. [2024-06-14 14:07:05,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 249 transitions, 3429 flow [2024-06-14 14:07:05,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:05,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 14:07:05,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-06-14 14:07:05,627 INFO L175 Difference]: Start difference. First operand has 185 places, 225 transitions, 2887 flow. Second operand 8 states and 212 transitions. [2024-06-14 14:07:05,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 249 transitions, 3429 flow [2024-06-14 14:07:06,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 249 transitions, 3273 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:06,753 INFO L231 Difference]: Finished difference. Result has 190 places, 225 transitions, 2844 flow [2024-06-14 14:07:06,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2731, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2844, PETRI_PLACES=190, PETRI_TRANSITIONS=225} [2024-06-14 14:07:06,754 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 137 predicate places. [2024-06-14 14:07:06,754 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 225 transitions, 2844 flow [2024-06-14 14:07:06,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:06,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:06,754 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 14:07:06,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 14:07:06,755 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:07:06,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:06,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1315155488, now seen corresponding path program 2 times [2024-06-14 14:07:06,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:06,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723052950] [2024-06-14 14:07:06,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:06,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:07,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:07,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723052950] [2024-06-14 14:07:07,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723052950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:07,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:07,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:07,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632179866] [2024-06-14 14:07:07,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:07,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:07,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:07,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:07:07,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 225 transitions, 2844 flow. Second operand has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:07,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:07,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:07:07,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:08,824 INFO L124 PetriNetUnfolderBase]: 9350/14115 cut-off events. [2024-06-14 14:07:08,824 INFO L125 PetriNetUnfolderBase]: For 311263/311366 co-relation queries the response was YES. [2024-06-14 14:07:08,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85127 conditions, 14115 events. 9350/14115 cut-off events. For 311263/311366 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 95673 event pairs, 3345 based on Foata normal form. 39/13708 useless extension candidates. Maximal degree in co-relation 85036. Up to 12780 conditions per place. [2024-06-14 14:07:08,995 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 164 selfloop transitions, 40 changer transitions 0/255 dead transitions. [2024-06-14 14:07:08,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 255 transitions, 3368 flow [2024-06-14 14:07:08,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-14 14:07:08,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-14 14:07:08,996 INFO L175 Difference]: Start difference. First operand has 190 places, 225 transitions, 2844 flow. Second operand 8 states and 223 transitions. [2024-06-14 14:07:08,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 255 transitions, 3368 flow [2024-06-14 14:07:09,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 255 transitions, 3252 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:09,698 INFO L231 Difference]: Finished difference. Result has 193 places, 227 transitions, 2843 flow [2024-06-14 14:07:09,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2728, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2843, PETRI_PLACES=193, PETRI_TRANSITIONS=227} [2024-06-14 14:07:09,699 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 140 predicate places. [2024-06-14 14:07:09,699 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 227 transitions, 2843 flow [2024-06-14 14:07:09,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:09,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:09,699 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 14:07:09,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 14:07:09,700 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:07:09,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:09,700 INFO L85 PathProgramCache]: Analyzing trace with hash -193023480, now seen corresponding path program 3 times [2024-06-14 14:07:09,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:09,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101218253] [2024-06-14 14:07:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:09,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:10,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:10,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:10,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101218253] [2024-06-14 14:07:10,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101218253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:10,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:10,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:10,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151541722] [2024-06-14 14:07:10,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:10,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:10,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:10,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:10,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:10,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:07:10,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 227 transitions, 2843 flow. Second operand has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:10,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:10,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:07:10,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:11,775 INFO L124 PetriNetUnfolderBase]: 9358/14161 cut-off events. [2024-06-14 14:07:11,775 INFO L125 PetriNetUnfolderBase]: For 318455/318574 co-relation queries the response was YES. [2024-06-14 14:07:11,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86157 conditions, 14161 events. 9358/14161 cut-off events. For 318455/318574 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 96218 event pairs, 3327 based on Foata normal form. 41/13751 useless extension candidates. Maximal degree in co-relation 86066. Up to 12664 conditions per place. [2024-06-14 14:07:11,927 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 163 selfloop transitions, 47 changer transitions 0/261 dead transitions. [2024-06-14 14:07:11,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 261 transitions, 3417 flow [2024-06-14 14:07:11,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:11,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:11,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-14 14:07:11,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:07:11,928 INFO L175 Difference]: Start difference. First operand has 193 places, 227 transitions, 2843 flow. Second operand 8 states and 225 transitions. [2024-06-14 14:07:11,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 261 transitions, 3417 flow [2024-06-14 14:07:12,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 261 transitions, 3332 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:12,810 INFO L231 Difference]: Finished difference. Result has 196 places, 230 transitions, 2920 flow [2024-06-14 14:07:12,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2920, PETRI_PLACES=196, PETRI_TRANSITIONS=230} [2024-06-14 14:07:12,811 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 143 predicate places. [2024-06-14 14:07:12,811 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 230 transitions, 2920 flow [2024-06-14 14:07:12,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:12,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:12,811 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 14:07:12,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 14:07:12,811 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:07:12,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:12,811 INFO L85 PathProgramCache]: Analyzing trace with hash 634960328, now seen corresponding path program 1 times [2024-06-14 14:07:12,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:12,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046450435] [2024-06-14 14:07:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:12,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:13,110 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 14:07:13,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:13,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046450435] [2024-06-14 14:07:13,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046450435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:13,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:13,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:13,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020092624] [2024-06-14 14:07:13,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:13,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:13,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:13,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:13,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:13,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:07:13,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 230 transitions, 2920 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:13,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:13,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:07:13,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:15,046 INFO L124 PetriNetUnfolderBase]: 10126/15279 cut-off events. [2024-06-14 14:07:15,047 INFO L125 PetriNetUnfolderBase]: For 325421/325421 co-relation queries the response was YES. [2024-06-14 14:07:15,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92948 conditions, 15279 events. 10126/15279 cut-off events. For 325421/325421 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 102995 event pairs, 3665 based on Foata normal form. 6/15282 useless extension candidates. Maximal degree in co-relation 92855. Up to 14266 conditions per place. [2024-06-14 14:07:15,198 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 236 selfloop transitions, 25 changer transitions 0/269 dead transitions. [2024-06-14 14:07:15,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 269 transitions, 3727 flow [2024-06-14 14:07:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-14 14:07:15,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:07:15,199 INFO L175 Difference]: Start difference. First operand has 196 places, 230 transitions, 2920 flow. Second operand 6 states and 175 transitions. [2024-06-14 14:07:15,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 269 transitions, 3727 flow [2024-06-14 14:07:16,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 269 transitions, 3635 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:16,235 INFO L231 Difference]: Finished difference. Result has 198 places, 236 transitions, 2997 flow [2024-06-14 14:07:16,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2997, PETRI_PLACES=198, PETRI_TRANSITIONS=236} [2024-06-14 14:07:16,236 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 145 predicate places. [2024-06-14 14:07:16,236 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 236 transitions, 2997 flow [2024-06-14 14:07:16,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:16,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:16,236 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 14:07:16,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 14:07:16,236 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:07:16,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:16,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1682448728, now seen corresponding path program 2 times [2024-06-14 14:07:16,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:16,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633070914] [2024-06-14 14:07:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:16,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:16,530 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 14:07:16,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:16,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633070914] [2024-06-14 14:07:16,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633070914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:16,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:16,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:16,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050236921] [2024-06-14 14:07:16,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:16,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:16,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:16,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:16,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:16,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:07:16,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 236 transitions, 2997 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:16,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:16,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:07:16,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:18,291 INFO L124 PetriNetUnfolderBase]: 10170/15319 cut-off events. [2024-06-14 14:07:18,291 INFO L125 PetriNetUnfolderBase]: For 342514/342514 co-relation queries the response was YES. [2024-06-14 14:07:18,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94027 conditions, 15319 events. 10170/15319 cut-off events. For 342514/342514 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 103161 event pairs, 3636 based on Foata normal form. 8/15324 useless extension candidates. Maximal degree in co-relation 93932. Up to 14402 conditions per place. [2024-06-14 14:07:18,453 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 231 selfloop transitions, 22 changer transitions 0/261 dead transitions. [2024-06-14 14:07:18,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 261 transitions, 3621 flow [2024-06-14 14:07:18,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-14 14:07:18,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5533333333333333 [2024-06-14 14:07:18,455 INFO L175 Difference]: Start difference. First operand has 198 places, 236 transitions, 2997 flow. Second operand 6 states and 166 transitions. [2024-06-14 14:07:18,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 261 transitions, 3621 flow [2024-06-14 14:07:19,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 261 transitions, 3564 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 14:07:19,601 INFO L231 Difference]: Finished difference. Result has 202 places, 238 transitions, 3032 flow [2024-06-14 14:07:19,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3032, PETRI_PLACES=202, PETRI_TRANSITIONS=238} [2024-06-14 14:07:19,602 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 149 predicate places. [2024-06-14 14:07:19,602 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 238 transitions, 3032 flow [2024-06-14 14:07:19,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:19,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:19,602 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 14:07:19,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 14:07:19,602 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:07:19,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:19,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1688159672, now seen corresponding path program 1 times [2024-06-14 14:07:19,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:19,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082634213] [2024-06-14 14:07:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:19,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:19,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:19,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082634213] [2024-06-14 14:07:19,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082634213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:19,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:19,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:19,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690302983] [2024-06-14 14:07:19,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:19,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:19,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:19,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:19,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:19,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:07:19,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 238 transitions, 3032 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:19,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:19,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:07:19,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:22,264 INFO L124 PetriNetUnfolderBase]: 10188/15374 cut-off events. [2024-06-14 14:07:22,265 INFO L125 PetriNetUnfolderBase]: For 348873/348875 co-relation queries the response was YES. [2024-06-14 14:07:22,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94446 conditions, 15374 events. 10188/15374 cut-off events. For 348873/348875 co-relation queries the response was YES. Maximal size of possible extension queue 868. Compared 103938 event pairs, 3626 based on Foata normal form. 3/15373 useless extension candidates. Maximal degree in co-relation 94349. Up to 14410 conditions per place. [2024-06-14 14:07:22,405 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 231 selfloop transitions, 39 changer transitions 0/278 dead transitions. [2024-06-14 14:07:22,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 278 transitions, 4008 flow [2024-06-14 14:07:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-14 14:07:22,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-06-14 14:07:22,407 INFO L175 Difference]: Start difference. First operand has 202 places, 238 transitions, 3032 flow. Second operand 6 states and 172 transitions. [2024-06-14 14:07:22,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 278 transitions, 4008 flow [2024-06-14 14:07:23,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 278 transitions, 3948 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:23,608 INFO L231 Difference]: Finished difference. Result has 205 places, 253 transitions, 3307 flow [2024-06-14 14:07:23,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2972, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3307, PETRI_PLACES=205, PETRI_TRANSITIONS=253} [2024-06-14 14:07:23,608 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 152 predicate places. [2024-06-14 14:07:23,608 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 253 transitions, 3307 flow [2024-06-14 14:07:23,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:23,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:23,609 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 14:07:23,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 14:07:23,609 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:07:23,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:23,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1682445752, now seen corresponding path program 2 times [2024-06-14 14:07:23,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:23,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648308853] [2024-06-14 14:07:23,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:23,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:23,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:23,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648308853] [2024-06-14 14:07:23,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648308853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:23,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:23,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:23,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937215761] [2024-06-14 14:07:23,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:23,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:23,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:23,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:23,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:23,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:07:23,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 253 transitions, 3307 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:23,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:23,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:07:23,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:26,222 INFO L124 PetriNetUnfolderBase]: 10206/15389 cut-off events. [2024-06-14 14:07:26,222 INFO L125 PetriNetUnfolderBase]: For 374077/374079 co-relation queries the response was YES. [2024-06-14 14:07:26,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97394 conditions, 15389 events. 10206/15389 cut-off events. For 374077/374079 co-relation queries the response was YES. Maximal size of possible extension queue 868. Compared 103780 event pairs, 3621 based on Foata normal form. 3/15388 useless extension candidates. Maximal degree in co-relation 97294. Up to 14430 conditions per place. [2024-06-14 14:07:26,495 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 228 selfloop transitions, 47 changer transitions 0/283 dead transitions. [2024-06-14 14:07:26,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 283 transitions, 4218 flow [2024-06-14 14:07:26,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:26,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-14 14:07:26,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5633333333333334 [2024-06-14 14:07:26,504 INFO L175 Difference]: Start difference. First operand has 205 places, 253 transitions, 3307 flow. Second operand 6 states and 169 transitions. [2024-06-14 14:07:26,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 283 transitions, 4218 flow [2024-06-14 14:07:27,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 283 transitions, 4101 flow, removed 52 selfloop flow, removed 1 redundant places. [2024-06-14 14:07:27,763 INFO L231 Difference]: Finished difference. Result has 211 places, 262 transitions, 3464 flow [2024-06-14 14:07:27,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3464, PETRI_PLACES=211, PETRI_TRANSITIONS=262} [2024-06-14 14:07:27,763 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 158 predicate places. [2024-06-14 14:07:27,763 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 262 transitions, 3464 flow [2024-06-14 14:07:27,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:27,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:27,764 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 14:07:27,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 14:07:27,764 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:07:27,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:27,764 INFO L85 PathProgramCache]: Analyzing trace with hash -403425718, now seen corresponding path program 3 times [2024-06-14 14:07:27,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:27,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431647402] [2024-06-14 14:07:27,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:27,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:28,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:28,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431647402] [2024-06-14 14:07:28,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431647402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:28,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:28,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:28,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263847046] [2024-06-14 14:07:28,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:28,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:28,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:28,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:28,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:28,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:07:28,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 262 transitions, 3464 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:28,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:28,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:07:28,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:30,388 INFO L124 PetriNetUnfolderBase]: 10180/15361 cut-off events. [2024-06-14 14:07:30,388 INFO L125 PetriNetUnfolderBase]: For 385329/385329 co-relation queries the response was YES. [2024-06-14 14:07:30,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97246 conditions, 15361 events. 10180/15361 cut-off events. For 385329/385329 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103685 event pairs, 3619 based on Foata normal form. 8/15366 useless extension candidates. Maximal degree in co-relation 97143. Up to 14414 conditions per place. [2024-06-14 14:07:30,663 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 250 selfloop transitions, 22 changer transitions 0/280 dead transitions. [2024-06-14 14:07:30,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 280 transitions, 4089 flow [2024-06-14 14:07:30,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 14:07:30,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 14:07:30,665 INFO L175 Difference]: Start difference. First operand has 211 places, 262 transitions, 3464 flow. Second operand 6 states and 160 transitions. [2024-06-14 14:07:30,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 280 transitions, 4089 flow [2024-06-14 14:07:32,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 280 transitions, 3999 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-14 14:07:32,055 INFO L231 Difference]: Finished difference. Result has 215 places, 263 transitions, 3439 flow [2024-06-14 14:07:32,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3439, PETRI_PLACES=215, PETRI_TRANSITIONS=263} [2024-06-14 14:07:32,056 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 162 predicate places. [2024-06-14 14:07:32,056 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 263 transitions, 3439 flow [2024-06-14 14:07:32,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:32,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:32,056 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 14:07:32,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 14:07:32,056 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:07:32,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:32,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1370735312, now seen corresponding path program 3 times [2024-06-14 14:07:32,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:32,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599190462] [2024-06-14 14:07:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:32,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:32,396 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 14:07:32,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:32,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599190462] [2024-06-14 14:07:32,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599190462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:32,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:32,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:32,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639811552] [2024-06-14 14:07:32,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:32,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:32,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:32,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:32,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:32,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:07:32,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 263 transitions, 3439 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:32,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:32,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:07:32,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:34,837 INFO L124 PetriNetUnfolderBase]: 10176/15360 cut-off events. [2024-06-14 14:07:34,837 INFO L125 PetriNetUnfolderBase]: For 390245/390247 co-relation queries the response was YES. [2024-06-14 14:07:34,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97378 conditions, 15360 events. 10176/15360 cut-off events. For 390245/390247 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103813 event pairs, 3618 based on Foata normal form. 3/15359 useless extension candidates. Maximal degree in co-relation 97274. Up to 14411 conditions per place. [2024-06-14 14:07:34,985 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 239 selfloop transitions, 35 changer transitions 0/282 dead transitions. [2024-06-14 14:07:34,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 282 transitions, 4119 flow [2024-06-14 14:07:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:07:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:07:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-14 14:07:34,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.588 [2024-06-14 14:07:34,986 INFO L175 Difference]: Start difference. First operand has 215 places, 263 transitions, 3439 flow. Second operand 5 states and 147 transitions. [2024-06-14 14:07:34,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 282 transitions, 4119 flow [2024-06-14 14:07:36,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 282 transitions, 4037 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:36,686 INFO L231 Difference]: Finished difference. Result has 215 places, 263 transitions, 3439 flow [2024-06-14 14:07:36,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3357, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3439, PETRI_PLACES=215, PETRI_TRANSITIONS=263} [2024-06-14 14:07:36,687 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 162 predicate places. [2024-06-14 14:07:36,687 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 263 transitions, 3439 flow [2024-06-14 14:07:36,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:36,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:36,687 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 14:07:36,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 14:07:36,688 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:07:36,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:36,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1422679574, now seen corresponding path program 4 times [2024-06-14 14:07:36,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:36,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372065300] [2024-06-14 14:07:36,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:36,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:37,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:37,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372065300] [2024-06-14 14:07:37,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372065300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:37,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:37,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:37,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791665144] [2024-06-14 14:07:37,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:37,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:37,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:37,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:37,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:37,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:07:37,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 263 transitions, 3439 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:37,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:37,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:07:37,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:39,276 INFO L124 PetriNetUnfolderBase]: 10172/15357 cut-off events. [2024-06-14 14:07:39,276 INFO L125 PetriNetUnfolderBase]: For 400693/400695 co-relation queries the response was YES. [2024-06-14 14:07:39,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97544 conditions, 15357 events. 10172/15357 cut-off events. For 400693/400695 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103661 event pairs, 3616 based on Foata normal form. 3/15358 useless extension candidates. Maximal degree in co-relation 97440. Up to 14407 conditions per place. [2024-06-14 14:07:39,451 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 238 selfloop transitions, 39 changer transitions 0/285 dead transitions. [2024-06-14 14:07:39,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 285 transitions, 4077 flow [2024-06-14 14:07:39,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-14 14:07:39,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2024-06-14 14:07:39,452 INFO L175 Difference]: Start difference. First operand has 215 places, 263 transitions, 3439 flow. Second operand 7 states and 188 transitions. [2024-06-14 14:07:39,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 285 transitions, 4077 flow [2024-06-14 14:07:41,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 285 transitions, 3956 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:41,307 INFO L231 Difference]: Finished difference. Result has 218 places, 265 transitions, 3442 flow [2024-06-14 14:07:41,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3442, PETRI_PLACES=218, PETRI_TRANSITIONS=265} [2024-06-14 14:07:41,308 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 165 predicate places. [2024-06-14 14:07:41,308 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 265 transitions, 3442 flow [2024-06-14 14:07:41,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:41,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:41,308 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 14:07:41,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 14:07:41,308 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:07:41,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:41,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1320867424, now seen corresponding path program 5 times [2024-06-14 14:07:41,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:41,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140116488] [2024-06-14 14:07:41,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:41,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:41,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:41,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140116488] [2024-06-14 14:07:41,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140116488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:41,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:41,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:41,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316462070] [2024-06-14 14:07:41,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:41,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:41,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:41,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:41,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:41,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:07:41,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 265 transitions, 3442 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:41,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:41,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:07:41,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:43,834 INFO L124 PetriNetUnfolderBase]: 10168/15347 cut-off events. [2024-06-14 14:07:43,834 INFO L125 PetriNetUnfolderBase]: For 412659/412661 co-relation queries the response was YES. [2024-06-14 14:07:43,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97719 conditions, 15347 events. 10168/15347 cut-off events. For 412659/412661 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103682 event pairs, 3631 based on Foata normal form. 3/15347 useless extension candidates. Maximal degree in co-relation 97614. Up to 14384 conditions per place. [2024-06-14 14:07:43,997 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 221 selfloop transitions, 51 changer transitions 0/280 dead transitions. [2024-06-14 14:07:43,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 280 transitions, 4044 flow [2024-06-14 14:07:43,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:43,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:43,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-14 14:07:43,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366666666666666 [2024-06-14 14:07:43,998 INFO L175 Difference]: Start difference. First operand has 218 places, 265 transitions, 3442 flow. Second operand 6 states and 161 transitions. [2024-06-14 14:07:43,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 280 transitions, 4044 flow [2024-06-14 14:07:45,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 280 transitions, 3936 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:45,825 INFO L231 Difference]: Finished difference. Result has 220 places, 267 transitions, 3469 flow [2024-06-14 14:07:45,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3346, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3469, PETRI_PLACES=220, PETRI_TRANSITIONS=267} [2024-06-14 14:07:45,826 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 167 predicate places. [2024-06-14 14:07:45,826 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 267 transitions, 3469 flow [2024-06-14 14:07:45,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:45,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:45,827 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 14:07:45,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 14:07:45,827 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:07:45,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:45,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1333255520, now seen corresponding path program 1 times [2024-06-14 14:07:45,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:45,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470344905] [2024-06-14 14:07:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:45,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:46,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:46,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470344905] [2024-06-14 14:07:46,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470344905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:46,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:46,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:46,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137528007] [2024-06-14 14:07:46,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:46,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:46,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:46,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:46,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:46,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:07:46,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 267 transitions, 3469 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:46,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:46,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:07:46,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:48,617 INFO L124 PetriNetUnfolderBase]: 10149/15307 cut-off events. [2024-06-14 14:07:48,617 INFO L125 PetriNetUnfolderBase]: For 424006/424006 co-relation queries the response was YES. [2024-06-14 14:07:48,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97535 conditions, 15307 events. 10149/15307 cut-off events. For 424006/424006 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 103195 event pairs, 3593 based on Foata normal form. 6/15310 useless extension candidates. Maximal degree in co-relation 97428. Up to 14312 conditions per place. [2024-06-14 14:07:48,778 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 256 selfloop transitions, 28 changer transitions 0/292 dead transitions. [2024-06-14 14:07:48,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 292 transitions, 4207 flow [2024-06-14 14:07:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:48,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-14 14:07:48,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-14 14:07:48,779 INFO L175 Difference]: Start difference. First operand has 220 places, 267 transitions, 3469 flow. Second operand 6 states and 162 transitions. [2024-06-14 14:07:48,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 292 transitions, 4207 flow [2024-06-14 14:07:50,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 292 transitions, 4121 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:50,588 INFO L231 Difference]: Finished difference. Result has 224 places, 272 transitions, 3544 flow [2024-06-14 14:07:50,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3544, PETRI_PLACES=224, PETRI_TRANSITIONS=272} [2024-06-14 14:07:50,588 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 171 predicate places. [2024-06-14 14:07:50,588 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 272 transitions, 3544 flow [2024-06-14 14:07:50,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 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 14:07:50,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:50,588 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 14:07:50,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 14:07:50,589 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:07:50,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:50,589 INFO L85 PathProgramCache]: Analyzing trace with hash 341141604, now seen corresponding path program 1 times [2024-06-14 14:07:50,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:50,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794514358] [2024-06-14 14:07:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:50,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:51,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:51,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794514358] [2024-06-14 14:07:51,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794514358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:51,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:51,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:51,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752524850] [2024-06-14 14:07:51,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:51,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:51,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:51,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:51,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:51,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:07:51,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 272 transitions, 3544 flow. Second operand has 9 states, 9 states have (on average 18.11111111111111) internal successors, (163), 9 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:51,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:51,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:07:51,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:53,420 INFO L124 PetriNetUnfolderBase]: 10350/15618 cut-off events. [2024-06-14 14:07:53,420 INFO L125 PetriNetUnfolderBase]: For 452284/452287 co-relation queries the response was YES. [2024-06-14 14:07:53,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100934 conditions, 15618 events. 10350/15618 cut-off events. For 452284/452287 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 105594 event pairs, 3643 based on Foata normal form. 6/15619 useless extension candidates. Maximal degree in co-relation 100824. Up to 14377 conditions per place. [2024-06-14 14:07:53,583 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 208 selfloop transitions, 110 changer transitions 0/326 dead transitions. [2024-06-14 14:07:53,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 326 transitions, 4871 flow [2024-06-14 14:07:53,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-14 14:07:53,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:07:53,584 INFO L175 Difference]: Start difference. First operand has 224 places, 272 transitions, 3544 flow. Second operand 6 states and 180 transitions. [2024-06-14 14:07:53,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 326 transitions, 4871 flow [2024-06-14 14:07:56,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 326 transitions, 4814 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 14:07:56,025 INFO L231 Difference]: Finished difference. Result has 229 places, 304 transitions, 4355 flow [2024-06-14 14:07:56,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4355, PETRI_PLACES=229, PETRI_TRANSITIONS=304} [2024-06-14 14:07:56,026 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 176 predicate places. [2024-06-14 14:07:56,026 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 304 transitions, 4355 flow [2024-06-14 14:07:56,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.11111111111111) internal successors, (163), 9 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:56,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:56,027 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 14:07:56,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 14:07:56,028 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:07:56,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:56,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1061213204, now seen corresponding path program 2 times [2024-06-14 14:07:56,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:56,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116994956] [2024-06-14 14:07:56,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:56,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:56,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:56,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116994956] [2024-06-14 14:07:56,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116994956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:56,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:56,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:56,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934021169] [2024-06-14 14:07:56,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:56,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:56,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:56,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:56,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:07:56,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 304 transitions, 4355 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 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 14:07:56,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:56,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:07:56,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:58,792 INFO L124 PetriNetUnfolderBase]: 10326/15588 cut-off events. [2024-06-14 14:07:58,792 INFO L125 PetriNetUnfolderBase]: For 488787/488790 co-relation queries the response was YES. [2024-06-14 14:07:58,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106107 conditions, 15588 events. 10326/15588 cut-off events. For 488787/488790 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 105363 event pairs, 3643 based on Foata normal form. 6/15589 useless extension candidates. Maximal degree in co-relation 105994. Up to 14353 conditions per place. [2024-06-14 14:07:58,958 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 208 selfloop transitions, 112 changer transitions 0/328 dead transitions. [2024-06-14 14:07:58,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 328 transitions, 5133 flow [2024-06-14 14:07:58,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-14 14:07:58,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-14 14:07:58,959 INFO L175 Difference]: Start difference. First operand has 229 places, 304 transitions, 4355 flow. Second operand 7 states and 203 transitions. [2024-06-14 14:07:58,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 328 transitions, 5133 flow [2024-06-14 14:08:01,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 328 transitions, 4882 flow, removed 93 selfloop flow, removed 3 redundant places. [2024-06-14 14:08:01,571 INFO L231 Difference]: Finished difference. Result has 233 places, 306 transitions, 4396 flow [2024-06-14 14:08:01,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4126, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4396, PETRI_PLACES=233, PETRI_TRANSITIONS=306} [2024-06-14 14:08:01,571 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 180 predicate places. [2024-06-14 14:08:01,571 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 306 transitions, 4396 flow [2024-06-14 14:08:01,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 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 14:08:01,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:01,572 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 14:08:01,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 14:08:01,572 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:08:01,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash -392815012, now seen corresponding path program 1 times [2024-06-14 14:08:01,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:01,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394907113] [2024-06-14 14:08:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:01,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:01,908 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 14:08:01,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:01,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394907113] [2024-06-14 14:08:01,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394907113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:01,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:01,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:01,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781798702] [2024-06-14 14:08:01,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:01,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:01,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:01,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:01,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:01,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:08:01,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 306 transitions, 4396 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:01,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:01,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:08:01,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand