./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe002_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.i ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe002_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 10:34:39,359 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:34:39,425 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:34:39,430 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:34:39,430 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:34:39,456 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:34:39,457 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:34:39,457 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:34:39,458 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:34:39,461 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:34:39,461 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:34:39,462 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:34:39,463 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:34:39,463 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:34:39,463 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:34:39,464 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:34:39,464 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:34:39,464 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:34:39,464 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:34:39,464 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:34:39,465 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:34:39,465 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:34:39,465 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:34:39,465 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:34:39,466 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:34:39,466 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:34:39,466 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:34:39,466 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:34:39,467 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:34:39,467 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:34:39,468 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:34:39,468 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:34:39,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:34:39,468 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:34:39,469 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:34:39,482 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:34:39,482 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:34:39,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:34:39,482 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:34:39,483 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:34:39,483 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:34:39,483 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:34:39,483 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:34:39,483 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:34:39,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:34:39,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:34:39,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:34:39,747 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:34:39,748 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:34:39,749 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.i [2024-05-12 10:34:40,733 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:34:40,958 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:34:40,958 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_tso.i [2024-05-12 10:34:40,979 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8acef1215/aeb5a26d235c4f9c81c9a10c4e8498f3/FLAG32680536a [2024-05-12 10:34:40,991 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8acef1215/aeb5a26d235c4f9c81c9a10c4e8498f3 [2024-05-12 10:34:40,993 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:34:40,996 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:34:40,998 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/safe002_tso.yml/witness.yml [2024-05-12 10:34:41,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:34:41,093 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:34:41,094 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:34:41,094 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:34:41,100 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:34:41,101 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:34:40" (1/2) ... [2024-05-12 10:34:41,101 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42a3014a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:41, skipping insertion in model container [2024-05-12 10:34:41,102 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:34:40" (1/2) ... [2024-05-12 10:34:41,103 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d77ad8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:41, skipping insertion in model container [2024-05-12 10:34:41,104 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:34:41" (2/2) ... [2024-05-12 10:34:41,104 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42a3014a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:41, skipping insertion in model container [2024-05-12 10:34:41,104 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:34:41" (2/2) ... [2024-05-12 10:34:41,104 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:34:41,141 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:34:41,142 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EBX <= 1) && x <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-05-12 10:34:41,143 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EBX <= 1) && x <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-05-12 10:34:41,143 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EBX <= 1) && x <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-05-12 10:34:41,143 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:34:41,143 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-05-12 10:34:41,184 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:34:41,314 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_tso.i[945,958] [2024-05-12 10:34:41,424 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:34:41,435 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 10:34:41,472 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 10:34:41,564 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:34:41,591 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:34:41,592 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:41 WrapperNode [2024-05-12 10:34:41,593 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:34:41,594 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:34:41,594 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:34:41,595 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:34:41,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:41" (1/1) ... [2024-05-12 10:34:41,613 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:41" (1/1) ... [2024-05-12 10:34:41,635 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2024-05-12 10:34:41,636 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:34:41,637 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:34:41,637 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:34:41,637 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:34:41,645 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:41" (1/1) ... [2024-05-12 10:34:41,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:41" (1/1) ... [2024-05-12 10:34:41,648 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:41" (1/1) ... [2024-05-12 10:34:41,660 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 10:34:41,660 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:41" (1/1) ... [2024-05-12 10:34:41,660 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:41" (1/1) ... [2024-05-12 10:34:41,666 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:41" (1/1) ... [2024-05-12 10:34:41,667 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:41" (1/1) ... [2024-05-12 10:34:41,669 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:41" (1/1) ... [2024-05-12 10:34:41,670 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:41" (1/1) ... [2024-05-12 10:34:41,672 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:34:41,673 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:34:41,673 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:34:41,673 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:34:41,674 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:41" (1/1) ... [2024-05-12 10:34:41,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:34:41,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:34:41,710 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) [2024-05-12 10:34:41,712 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 [2024-05-12 10:34:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:34:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:34:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:34:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 10:34:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 10:34:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:34:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:34:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:34:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 10:34:41,739 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 10:34:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 10:34:41,740 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 10:34:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 10:34:41,740 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 10:34:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:34:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:34:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:34:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 10:34:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 10:34:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:34:41,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:34:41,742 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 10:34:41,883 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:34:41,884 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:34:42,184 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:34:42,184 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:34:42,244 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:34:42,246 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 10:34:42,246 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:34:42 BoogieIcfgContainer [2024-05-12 10:34:42,246 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:34:42,248 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:34:42,248 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:34:42,250 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:34:42,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:34:40" (1/4) ... [2024-05-12 10:34:42,251 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef444e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:34:42, skipping insertion in model container [2024-05-12 10:34:42,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:34:41" (2/4) ... [2024-05-12 10:34:42,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef444e3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:34:42, skipping insertion in model container [2024-05-12 10:34:42,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:41" (3/4) ... [2024-05-12 10:34:42,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef444e3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:34:42, skipping insertion in model container [2024-05-12 10:34:42,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:34:42" (4/4) ... [2024-05-12 10:34:42,253 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_tso.i [2024-05-12 10:34:42,265 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:34:42,266 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 10:34:42,266 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:34:42,304 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 10:34:42,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-05-12 10:34:42,358 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-05-12 10:34:42,359 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:34:42,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-05-12 10:34:42,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-05-12 10:34:42,369 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-05-12 10:34:42,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:34:42,388 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;@65d52ede, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:34:42,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 10:34:42,391 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:34:42,392 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 10:34:42,392 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:34:42,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:42,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 10:34:42,393 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:42,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:42,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1708197830, now seen corresponding path program 1 times [2024-05-12 10:34:42,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:42,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395446368] [2024-05-12 10:34:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:42,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:43,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:43,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395446368] [2024-05-12 10:34:43,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395446368] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:43,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:43,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 10:34:43,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081314638] [2024-05-12 10:34:43,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:43,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:34:43,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:43,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:34:43,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:34:43,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-05-12 10:34:43,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:43,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:43,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-05-12 10:34:43,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:43,332 INFO L124 PetriNetUnfolderBase]: 696/1147 cut-off events. [2024-05-12 10:34:43,332 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-05-12 10:34:43,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2258 conditions, 1147 events. 696/1147 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6296 event pairs, 393 based on Foata normal form. 1/1099 useless extension candidates. Maximal degree in co-relation 2243. Up to 1056 conditions per place. [2024-05-12 10:34:43,340 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 33 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-05-12 10:34:43,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 193 flow [2024-05-12 10:34:43,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:34:43,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:34:43,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-05-12 10:34:43,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7028985507246377 [2024-05-12 10:34:43,352 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 97 transitions. [2024-05-12 10:34:43,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 193 flow [2024-05-12 10:34:43,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 10:34:43,359 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 116 flow [2024-05-12 10:34:43,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-05-12 10:34:43,363 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-05-12 10:34:43,364 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 116 flow [2024-05-12 10:34:43,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:43,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:43,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:43,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:34:43,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:43,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:43,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1917789224, now seen corresponding path program 1 times [2024-05-12 10:34:43,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:43,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099655169] [2024-05-12 10:34:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:43,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:43,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:43,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099655169] [2024-05-12 10:34:43,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099655169] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:43,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:43,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:34:43,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996923341] [2024-05-12 10:34:43,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:43,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:34:43,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:43,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:34:43,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:34:43,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:34:43,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 116 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:43,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:43,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:34:43,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:44,018 INFO L124 PetriNetUnfolderBase]: 1225/1962 cut-off events. [2024-05-12 10:34:44,019 INFO L125 PetriNetUnfolderBase]: For 318/332 co-relation queries the response was YES. [2024-05-12 10:34:44,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4371 conditions, 1962 events. 1225/1962 cut-off events. For 318/332 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10750 event pairs, 521 based on Foata normal form. 13/1942 useless extension candidates. Maximal degree in co-relation 4356. Up to 1745 conditions per place. [2024-05-12 10:34:44,032 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 43 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2024-05-12 10:34:44,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 62 transitions, 260 flow [2024-05-12 10:34:44,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:34:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:34:44,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-05-12 10:34:44,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 10:34:44,038 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 116 flow. Second operand 4 states and 120 transitions. [2024-05-12 10:34:44,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 62 transitions, 260 flow [2024-05-12 10:34:44,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 62 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:34:44,040 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 139 flow [2024-05-12 10:34:44,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-05-12 10:34:44,045 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2024-05-12 10:34:44,045 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 139 flow [2024-05-12 10:34:44,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:44,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:44,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:44,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:34:44,046 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:44,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:44,046 INFO L85 PathProgramCache]: Analyzing trace with hash 903873776, now seen corresponding path program 1 times [2024-05-12 10:34:44,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:44,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577961494] [2024-05-12 10:34:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:44,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:44,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:44,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577961494] [2024-05-12 10:34:44,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577961494] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:44,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:44,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:34:44,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101875342] [2024-05-12 10:34:44,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:44,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:34:44,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:44,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:34:44,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:34:44,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 10:34:44,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 139 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) [2024-05-12 10:34:44,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:44,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 10:34:44,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:44,542 INFO L124 PetriNetUnfolderBase]: 951/1592 cut-off events. [2024-05-12 10:34:44,543 INFO L125 PetriNetUnfolderBase]: For 700/703 co-relation queries the response was YES. [2024-05-12 10:34:44,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3784 conditions, 1592 events. 951/1592 cut-off events. For 700/703 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8730 event pairs, 366 based on Foata normal form. 4/1593 useless extension candidates. Maximal degree in co-relation 3767. Up to 1411 conditions per place. [2024-05-12 10:34:44,553 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 44 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-05-12 10:34:44,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 65 transitions, 301 flow [2024-05-12 10:34:44,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:34:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:34:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-05-12 10:34:44,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 10:34:44,557 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 139 flow. Second operand 4 states and 120 transitions. [2024-05-12 10:34:44,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 65 transitions, 301 flow [2024-05-12 10:34:44,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 284 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-05-12 10:34:44,561 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 182 flow [2024-05-12 10:34:44,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-05-12 10:34:44,562 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2024-05-12 10:34:44,562 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 182 flow [2024-05-12 10:34:44,563 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) [2024-05-12 10:34:44,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:44,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:44,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:34:44,564 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:44,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:44,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2044682512, now seen corresponding path program 1 times [2024-05-12 10:34:44,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:44,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225156172] [2024-05-12 10:34:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:44,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:44,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:44,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225156172] [2024-05-12 10:34:44,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225156172] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:44,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:44,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:34:44,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038298812] [2024-05-12 10:34:44,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:44,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:34:44,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:44,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:34:44,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:34:44,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:44,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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) [2024-05-12 10:34:44,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:44,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:44,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:45,151 INFO L124 PetriNetUnfolderBase]: 1611/2592 cut-off events. [2024-05-12 10:34:45,151 INFO L125 PetriNetUnfolderBase]: For 1613/1615 co-relation queries the response was YES. [2024-05-12 10:34:45,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6593 conditions, 2592 events. 1611/2592 cut-off events. For 1613/1615 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14937 event pairs, 408 based on Foata normal form. 10/2597 useless extension candidates. Maximal degree in co-relation 6574. Up to 2154 conditions per place. [2024-05-12 10:34:45,168 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 64 selfloop transitions, 22 changer transitions 0/98 dead transitions. [2024-05-12 10:34:45,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 98 transitions, 488 flow [2024-05-12 10:34:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:34:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:34:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-05-12 10:34:45,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055900621118012 [2024-05-12 10:34:45,170 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 182 flow. Second operand 7 states and 195 transitions. [2024-05-12 10:34:45,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 98 transitions, 488 flow [2024-05-12 10:34:45,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 98 transitions, 484 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-05-12 10:34:45,174 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 315 flow [2024-05-12 10:34:45,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=315, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-05-12 10:34:45,175 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2024-05-12 10:34:45,175 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 315 flow [2024-05-12 10:34:45,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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) [2024-05-12 10:34:45,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:45,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:45,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 10:34:45,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:45,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:45,176 INFO L85 PathProgramCache]: Analyzing trace with hash -703068099, now seen corresponding path program 1 times [2024-05-12 10:34:45,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:45,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494257372] [2024-05-12 10:34:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:45,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:45,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494257372] [2024-05-12 10:34:45,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494257372] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:45,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:45,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:34:45,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842540358] [2024-05-12 10:34:45,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:45,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:34:45,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:45,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:34:45,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:34:45,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:34:45,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 315 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) [2024-05-12 10:34:45,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:45,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:34:45,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:45,789 INFO L124 PetriNetUnfolderBase]: 1593/2669 cut-off events. [2024-05-12 10:34:45,792 INFO L125 PetriNetUnfolderBase]: For 4810/4921 co-relation queries the response was YES. [2024-05-12 10:34:45,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8555 conditions, 2669 events. 1593/2669 cut-off events. For 4810/4921 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15691 event pairs, 530 based on Foata normal form. 32/2651 useless extension candidates. Maximal degree in co-relation 8531. Up to 2197 conditions per place. [2024-05-12 10:34:45,813 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 59 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2024-05-12 10:34:45,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 529 flow [2024-05-12 10:34:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:34:45,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:34:45,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-05-12 10:34:45,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657608695652174 [2024-05-12 10:34:45,815 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 315 flow. Second operand 4 states and 121 transitions. [2024-05-12 10:34:45,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 529 flow [2024-05-12 10:34:45,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 501 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 10:34:45,863 INFO L231 Difference]: Finished difference. Result has 65 places, 68 transitions, 349 flow [2024-05-12 10:34:45,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=349, PETRI_PLACES=65, PETRI_TRANSITIONS=68} [2024-05-12 10:34:45,864 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-05-12 10:34:45,864 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 68 transitions, 349 flow [2024-05-12 10:34:45,864 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) [2024-05-12 10:34:45,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:45,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:45,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 10:34:45,864 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:45,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:45,865 INFO L85 PathProgramCache]: Analyzing trace with hash -692223369, now seen corresponding path program 2 times [2024-05-12 10:34:45,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:45,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553974715] [2024-05-12 10:34:45,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:45,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:46,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:46,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553974715] [2024-05-12 10:34:46,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553974715] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:46,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:46,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:34:46,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320604125] [2024-05-12 10:34:46,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:46,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:34:46,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:46,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:34:46,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:34:46,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:34:46,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 68 transitions, 349 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) [2024-05-12 10:34:46,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:46,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:34:46,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:46,401 INFO L124 PetriNetUnfolderBase]: 1586/2659 cut-off events. [2024-05-12 10:34:46,401 INFO L125 PetriNetUnfolderBase]: For 6188/6309 co-relation queries the response was YES. [2024-05-12 10:34:46,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8978 conditions, 2659 events. 1586/2659 cut-off events. For 6188/6309 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15686 event pairs, 528 based on Foata normal form. 39/2650 useless extension candidates. Maximal degree in co-relation 8953. Up to 2168 conditions per place. [2024-05-12 10:34:46,417 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 65 selfloop transitions, 15 changer transitions 0/94 dead transitions. [2024-05-12 10:34:46,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 94 transitions, 601 flow [2024-05-12 10:34:46,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:34:46,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:34:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-05-12 10:34:46,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6391304347826087 [2024-05-12 10:34:46,419 INFO L175 Difference]: Start difference. First operand has 65 places, 68 transitions, 349 flow. Second operand 5 states and 147 transitions. [2024-05-12 10:34:46,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 94 transitions, 601 flow [2024-05-12 10:34:46,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 579 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-05-12 10:34:46,425 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 397 flow [2024-05-12 10:34:46,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=397, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-05-12 10:34:46,426 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2024-05-12 10:34:46,426 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 397 flow [2024-05-12 10:34:46,426 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) [2024-05-12 10:34:46,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:46,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:46,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 10:34:46,427 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:46,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:46,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2139799537, now seen corresponding path program 1 times [2024-05-12 10:34:46,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:46,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019251914] [2024-05-12 10:34:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:46,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:46,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:46,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019251914] [2024-05-12 10:34:46,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019251914] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:46,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:46,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:34:46,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842523538] [2024-05-12 10:34:46,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:46,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:34:46,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:46,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:34:46,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:34:46,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:46,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 397 flow. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:46,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:46,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:46,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:46,996 INFO L124 PetriNetUnfolderBase]: 1678/2782 cut-off events. [2024-05-12 10:34:46,997 INFO L125 PetriNetUnfolderBase]: For 6568/6570 co-relation queries the response was YES. [2024-05-12 10:34:47,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9549 conditions, 2782 events. 1678/2782 cut-off events. For 6568/6570 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16554 event pairs, 413 based on Foata normal form. 6/2779 useless extension candidates. Maximal degree in co-relation 9523. Up to 2173 conditions per place. [2024-05-12 10:34:47,019 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 79 selfloop transitions, 35 changer transitions 0/126 dead transitions. [2024-05-12 10:34:47,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 126 transitions, 847 flow [2024-05-12 10:34:47,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:34:47,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:34:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-05-12 10:34:47,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059782608695652 [2024-05-12 10:34:47,021 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 397 flow. Second operand 8 states and 223 transitions. [2024-05-12 10:34:47,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 126 transitions, 847 flow [2024-05-12 10:34:47,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 126 transitions, 803 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-05-12 10:34:47,030 INFO L231 Difference]: Finished difference. Result has 75 places, 86 transitions, 547 flow [2024-05-12 10:34:47,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=547, PETRI_PLACES=75, PETRI_TRANSITIONS=86} [2024-05-12 10:34:47,031 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2024-05-12 10:34:47,031 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 86 transitions, 547 flow [2024-05-12 10:34:47,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:47,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:47,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:47,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 10:34:47,032 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:47,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:47,032 INFO L85 PathProgramCache]: Analyzing trace with hash 438616919, now seen corresponding path program 1 times [2024-05-12 10:34:47,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:47,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956639672] [2024-05-12 10:34:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:47,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:47,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:47,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956639672] [2024-05-12 10:34:47,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956639672] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:47,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:47,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:34:47,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060897264] [2024-05-12 10:34:47,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:47,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:34:47,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:47,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:34:47,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:34:47,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:47,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 86 transitions, 547 flow. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:47,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:47,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:47,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:47,702 INFO L124 PetriNetUnfolderBase]: 1881/3015 cut-off events. [2024-05-12 10:34:47,702 INFO L125 PetriNetUnfolderBase]: For 9971/9973 co-relation queries the response was YES. [2024-05-12 10:34:47,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11650 conditions, 3015 events. 1881/3015 cut-off events. For 9971/9973 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17763 event pairs, 372 based on Foata normal form. 30/3040 useless extension candidates. Maximal degree in co-relation 11621. Up to 2307 conditions per place. [2024-05-12 10:34:47,723 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 95 selfloop transitions, 26 changer transitions 0/133 dead transitions. [2024-05-12 10:34:47,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 133 transitions, 977 flow [2024-05-12 10:34:47,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:34:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:34:47,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-05-12 10:34:47,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-05-12 10:34:47,725 INFO L175 Difference]: Start difference. First operand has 75 places, 86 transitions, 547 flow. Second operand 8 states and 225 transitions. [2024-05-12 10:34:47,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 133 transitions, 977 flow [2024-05-12 10:34:47,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 133 transitions, 937 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-05-12 10:34:47,740 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 617 flow [2024-05-12 10:34:47,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=617, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-05-12 10:34:47,741 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2024-05-12 10:34:47,741 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 617 flow [2024-05-12 10:34:47,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:47,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:47,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:47,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 10:34:47,742 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:47,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:47,742 INFO L85 PathProgramCache]: Analyzing trace with hash -320273085, now seen corresponding path program 1 times [2024-05-12 10:34:47,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:47,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54320088] [2024-05-12 10:34:47,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:47,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:48,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:48,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54320088] [2024-05-12 10:34:48,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54320088] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:48,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:48,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:34:48,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954635437] [2024-05-12 10:34:48,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:48,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:34:48,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:48,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:34:48,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:34:48,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:48,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 617 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:48,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:48,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:48,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:48,422 INFO L124 PetriNetUnfolderBase]: 2135/3455 cut-off events. [2024-05-12 10:34:48,422 INFO L125 PetriNetUnfolderBase]: For 12483/12485 co-relation queries the response was YES. [2024-05-12 10:34:48,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14112 conditions, 3455 events. 2135/3455 cut-off events. For 12483/12485 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20913 event pairs, 418 based on Foata normal form. 4/3443 useless extension candidates. Maximal degree in co-relation 14081. Up to 2811 conditions per place. [2024-05-12 10:34:48,446 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 99 selfloop transitions, 38 changer transitions 0/149 dead transitions. [2024-05-12 10:34:48,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 149 transitions, 1275 flow [2024-05-12 10:34:48,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:34:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:34:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 10:34:48,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-05-12 10:34:48,447 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 617 flow. Second operand 6 states and 177 transitions. [2024-05-12 10:34:48,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 149 transitions, 1275 flow [2024-05-12 10:34:48,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 149 transitions, 1179 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-05-12 10:34:48,469 INFO L231 Difference]: Finished difference. Result has 83 places, 119 transitions, 949 flow [2024-05-12 10:34:48,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=949, PETRI_PLACES=83, PETRI_TRANSITIONS=119} [2024-05-12 10:34:48,470 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2024-05-12 10:34:48,470 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 119 transitions, 949 flow [2024-05-12 10:34:48,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:48,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:48,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:48,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 10:34:48,471 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:48,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:48,471 INFO L85 PathProgramCache]: Analyzing trace with hash 15919125, now seen corresponding path program 2 times [2024-05-12 10:34:48,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:48,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602463364] [2024-05-12 10:34:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:48,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:48,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:48,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602463364] [2024-05-12 10:34:48,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602463364] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:48,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:48,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:34:48,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346465031] [2024-05-12 10:34:48,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:48,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:34:48,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:48,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:34:48,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:34:48,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:48,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 119 transitions, 949 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:48,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:48,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:48,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:49,177 INFO L124 PetriNetUnfolderBase]: 2254/3677 cut-off events. [2024-05-12 10:34:49,177 INFO L125 PetriNetUnfolderBase]: For 17426/17428 co-relation queries the response was YES. [2024-05-12 10:34:49,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16133 conditions, 3677 events. 2254/3677 cut-off events. For 17426/17428 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 22653 event pairs, 419 based on Foata normal form. 4/3664 useless extension candidates. Maximal degree in co-relation 16099. Up to 2694 conditions per place. [2024-05-12 10:34:49,203 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 96 selfloop transitions, 66 changer transitions 0/174 dead transitions. [2024-05-12 10:34:49,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 174 transitions, 1621 flow [2024-05-12 10:34:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:34:49,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:34:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-05-12 10:34:49,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222826086956522 [2024-05-12 10:34:49,205 INFO L175 Difference]: Start difference. First operand has 83 places, 119 transitions, 949 flow. Second operand 8 states and 229 transitions. [2024-05-12 10:34:49,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 174 transitions, 1621 flow [2024-05-12 10:34:49,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 174 transitions, 1589 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-05-12 10:34:49,231 INFO L231 Difference]: Finished difference. Result has 92 places, 133 transitions, 1275 flow [2024-05-12 10:34:49,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1275, PETRI_PLACES=92, PETRI_TRANSITIONS=133} [2024-05-12 10:34:49,233 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2024-05-12 10:34:49,233 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 133 transitions, 1275 flow [2024-05-12 10:34:49,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:49,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:49,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:49,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 10:34:49,234 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:49,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:49,234 INFO L85 PathProgramCache]: Analyzing trace with hash 15913545, now seen corresponding path program 3 times [2024-05-12 10:34:49,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:49,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659994412] [2024-05-12 10:34:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:49,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:49,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:49,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659994412] [2024-05-12 10:34:49,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659994412] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:49,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:49,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:34:49,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735004317] [2024-05-12 10:34:49,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:49,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:34:49,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:49,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:34:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:34:49,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:49,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 133 transitions, 1275 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:49,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:49,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:49,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:50,027 INFO L124 PetriNetUnfolderBase]: 2301/3742 cut-off events. [2024-05-12 10:34:50,027 INFO L125 PetriNetUnfolderBase]: For 23271/23273 co-relation queries the response was YES. [2024-05-12 10:34:50,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18494 conditions, 3742 events. 2301/3742 cut-off events. For 23271/23273 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23101 event pairs, 417 based on Foata normal form. 4/3728 useless extension candidates. Maximal degree in co-relation 18456. Up to 2737 conditions per place. [2024-05-12 10:34:50,052 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 110 selfloop transitions, 69 changer transitions 0/191 dead transitions. [2024-05-12 10:34:50,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 191 transitions, 1973 flow [2024-05-12 10:34:50,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:34:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:34:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 258 transitions. [2024-05-12 10:34:50,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-05-12 10:34:50,054 INFO L175 Difference]: Start difference. First operand has 92 places, 133 transitions, 1275 flow. Second operand 9 states and 258 transitions. [2024-05-12 10:34:50,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 191 transitions, 1973 flow [2024-05-12 10:34:50,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 191 transitions, 1894 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-05-12 10:34:50,100 INFO L231 Difference]: Finished difference. Result has 99 places, 141 transitions, 1467 flow [2024-05-12 10:34:50,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1467, PETRI_PLACES=99, PETRI_TRANSITIONS=141} [2024-05-12 10:34:50,101 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 49 predicate places. [2024-05-12 10:34:50,101 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 141 transitions, 1467 flow [2024-05-12 10:34:50,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:50,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:50,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:50,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 10:34:50,102 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:50,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:50,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1909274889, now seen corresponding path program 4 times [2024-05-12 10:34:50,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:50,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165383463] [2024-05-12 10:34:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:50,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:50,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:50,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165383463] [2024-05-12 10:34:50,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165383463] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:50,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:50,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:34:50,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142832249] [2024-05-12 10:34:50,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:50,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:34:50,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:50,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:34:50,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:34:50,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:50,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 141 transitions, 1467 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:50,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:50,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:50,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:50,825 INFO L124 PetriNetUnfolderBase]: 2348/3845 cut-off events. [2024-05-12 10:34:50,825 INFO L125 PetriNetUnfolderBase]: For 25880/25882 co-relation queries the response was YES. [2024-05-12 10:34:50,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19208 conditions, 3845 events. 2348/3845 cut-off events. For 25880/25882 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 23905 event pairs, 425 based on Foata normal form. 4/3828 useless extension candidates. Maximal degree in co-relation 19167. Up to 2631 conditions per place. [2024-05-12 10:34:50,854 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 94 selfloop transitions, 96 changer transitions 0/202 dead transitions. [2024-05-12 10:34:50,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 202 transitions, 2213 flow [2024-05-12 10:34:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:34:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:34:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 255 transitions. [2024-05-12 10:34:50,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159420289855072 [2024-05-12 10:34:50,855 INFO L175 Difference]: Start difference. First operand has 99 places, 141 transitions, 1467 flow. Second operand 9 states and 255 transitions. [2024-05-12 10:34:50,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 202 transitions, 2213 flow [2024-05-12 10:34:50,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 202 transitions, 2077 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-05-12 10:34:50,909 INFO L231 Difference]: Finished difference. Result has 105 places, 156 transitions, 1747 flow [2024-05-12 10:34:50,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1747, PETRI_PLACES=105, PETRI_TRANSITIONS=156} [2024-05-12 10:34:50,911 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 55 predicate places. [2024-05-12 10:34:50,911 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 156 transitions, 1747 flow [2024-05-12 10:34:50,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:50,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:50,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:50,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 10:34:50,912 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:50,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:50,912 INFO L85 PathProgramCache]: Analyzing trace with hash 33657623, now seen corresponding path program 1 times [2024-05-12 10:34:50,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:50,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268286711] [2024-05-12 10:34:50,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:50,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:51,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:51,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268286711] [2024-05-12 10:34:51,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268286711] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:51,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:51,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:34:51,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508449020] [2024-05-12 10:34:51,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:51,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:34:51,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:51,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:34:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:34:51,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:34:51,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 156 transitions, 1747 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:51,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:51,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:34:51,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:51,622 INFO L124 PetriNetUnfolderBase]: 2217/3634 cut-off events. [2024-05-12 10:34:51,622 INFO L125 PetriNetUnfolderBase]: For 29610/29631 co-relation queries the response was YES. [2024-05-12 10:34:51,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19520 conditions, 3634 events. 2217/3634 cut-off events. For 29610/29631 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22648 event pairs, 402 based on Foata normal form. 5/3628 useless extension candidates. Maximal degree in co-relation 19476. Up to 2990 conditions per place. [2024-05-12 10:34:51,656 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 132 selfloop transitions, 12 changer transitions 0/170 dead transitions. [2024-05-12 10:34:51,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 170 transitions, 2093 flow [2024-05-12 10:34:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:34:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:34:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-05-12 10:34:51,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:34:51,658 INFO L175 Difference]: Start difference. First operand has 105 places, 156 transitions, 1747 flow. Second operand 4 states and 116 transitions. [2024-05-12 10:34:51,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 170 transitions, 2093 flow [2024-05-12 10:34:51,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 170 transitions, 1995 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-05-12 10:34:51,746 INFO L231 Difference]: Finished difference. Result has 106 places, 156 transitions, 1683 flow [2024-05-12 10:34:51,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1649, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1683, PETRI_PLACES=106, PETRI_TRANSITIONS=156} [2024-05-12 10:34:51,747 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 56 predicate places. [2024-05-12 10:34:51,747 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 156 transitions, 1683 flow [2024-05-12 10:34:51,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:51,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:51,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:51,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 10:34:51,748 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:51,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:51,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1341391428, now seen corresponding path program 1 times [2024-05-12 10:34:51,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:51,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457800997] [2024-05-12 10:34:51,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:51,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:51,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:51,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457800997] [2024-05-12 10:34:51,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457800997] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:51,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:51,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:34:51,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753659239] [2024-05-12 10:34:51,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:51,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:34:51,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:51,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:34:51,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:34:52,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:34:52,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 156 transitions, 1683 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) [2024-05-12 10:34:52,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:52,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:34:52,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:52,437 INFO L124 PetriNetUnfolderBase]: 2377/3847 cut-off events. [2024-05-12 10:34:52,437 INFO L125 PetriNetUnfolderBase]: For 33939/34133 co-relation queries the response was YES. [2024-05-12 10:34:52,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20870 conditions, 3847 events. 2377/3847 cut-off events. For 33939/34133 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 23678 event pairs, 317 based on Foata normal form. 13/3781 useless extension candidates. Maximal degree in co-relation 20824. Up to 3095 conditions per place. [2024-05-12 10:34:52,469 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 149 selfloop transitions, 22 changer transitions 0/193 dead transitions. [2024-05-12 10:34:52,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 193 transitions, 2247 flow [2024-05-12 10:34:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:34:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:34:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 10:34:52,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-05-12 10:34:52,471 INFO L175 Difference]: Start difference. First operand has 106 places, 156 transitions, 1683 flow. Second operand 6 states and 176 transitions. [2024-05-12 10:34:52,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 193 transitions, 2247 flow [2024-05-12 10:34:52,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 193 transitions, 2223 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 10:34:52,551 INFO L231 Difference]: Finished difference. Result has 109 places, 160 transitions, 1790 flow [2024-05-12 10:34:52,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1790, PETRI_PLACES=109, PETRI_TRANSITIONS=160} [2024-05-12 10:34:52,551 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 59 predicate places. [2024-05-12 10:34:52,551 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 160 transitions, 1790 flow [2024-05-12 10:34:52,552 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) [2024-05-12 10:34:52,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:52,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:52,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 10:34:52,552 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:52,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:52,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1484048636, now seen corresponding path program 2 times [2024-05-12 10:34:52,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:52,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214698273] [2024-05-12 10:34:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:52,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:52,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:52,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214698273] [2024-05-12 10:34:52,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214698273] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:52,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:52,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:34:52,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692649473] [2024-05-12 10:34:52,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:52,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:34:52,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:52,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:34:52,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:34:52,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:34:52,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 160 transitions, 1790 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) [2024-05-12 10:34:52,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:52,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:34:52,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:53,244 INFO L124 PetriNetUnfolderBase]: 2363/3838 cut-off events. [2024-05-12 10:34:53,244 INFO L125 PetriNetUnfolderBase]: For 37044/37218 co-relation queries the response was YES. [2024-05-12 10:34:53,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21266 conditions, 3838 events. 2363/3838 cut-off events. For 37044/37218 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 23646 event pairs, 425 based on Foata normal form. 13/3776 useless extension candidates. Maximal degree in co-relation 21219. Up to 3181 conditions per place. [2024-05-12 10:34:53,274 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 144 selfloop transitions, 18 changer transitions 0/184 dead transitions. [2024-05-12 10:34:53,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 184 transitions, 2190 flow [2024-05-12 10:34:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:34:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:34:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-05-12 10:34:53,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6391304347826087 [2024-05-12 10:34:53,276 INFO L175 Difference]: Start difference. First operand has 109 places, 160 transitions, 1790 flow. Second operand 5 states and 147 transitions. [2024-05-12 10:34:53,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 184 transitions, 2190 flow [2024-05-12 10:34:53,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 184 transitions, 2130 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-05-12 10:34:53,344 INFO L231 Difference]: Finished difference. Result has 112 places, 160 transitions, 1774 flow [2024-05-12 10:34:53,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1774, PETRI_PLACES=112, PETRI_TRANSITIONS=160} [2024-05-12 10:34:53,346 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 62 predicate places. [2024-05-12 10:34:53,346 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 160 transitions, 1774 flow [2024-05-12 10:34:53,346 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) [2024-05-12 10:34:53,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:53,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:53,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 10:34:53,346 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:53,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:53,347 INFO L85 PathProgramCache]: Analyzing trace with hash 493316470, now seen corresponding path program 3 times [2024-05-12 10:34:53,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:53,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827895005] [2024-05-12 10:34:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:53,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:53,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:53,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827895005] [2024-05-12 10:34:53,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827895005] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:53,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:53,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:34:53,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109767373] [2024-05-12 10:34:53,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:53,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:34:53,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:53,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:34:53,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:34:53,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:34:53,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 160 transitions, 1774 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) [2024-05-12 10:34:53,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:53,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:34:53,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:54,035 INFO L124 PetriNetUnfolderBase]: 2364/3928 cut-off events. [2024-05-12 10:34:54,035 INFO L125 PetriNetUnfolderBase]: For 39285/39529 co-relation queries the response was YES. [2024-05-12 10:34:54,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21208 conditions, 3928 events. 2364/3928 cut-off events. For 39285/39529 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24673 event pairs, 512 based on Foata normal form. 56/3903 useless extension candidates. Maximal degree in co-relation 21159. Up to 3160 conditions per place. [2024-05-12 10:34:54,064 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 149 selfloop transitions, 21 changer transitions 0/192 dead transitions. [2024-05-12 10:34:54,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 192 transitions, 2246 flow [2024-05-12 10:34:54,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:34:54,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:34:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-05-12 10:34:54,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6268115942028986 [2024-05-12 10:34:54,066 INFO L175 Difference]: Start difference. First operand has 112 places, 160 transitions, 1774 flow. Second operand 6 states and 173 transitions. [2024-05-12 10:34:54,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 192 transitions, 2246 flow [2024-05-12 10:34:54,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 192 transitions, 2205 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-05-12 10:34:54,141 INFO L231 Difference]: Finished difference. Result has 114 places, 162 transitions, 1828 flow [2024-05-12 10:34:54,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1828, PETRI_PLACES=114, PETRI_TRANSITIONS=162} [2024-05-12 10:34:54,143 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 64 predicate places. [2024-05-12 10:34:54,143 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 162 transitions, 1828 flow [2024-05-12 10:34:54,143 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) [2024-05-12 10:34:54,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:54,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:54,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 10:34:54,144 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:54,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:54,144 INFO L85 PathProgramCache]: Analyzing trace with hash 942028878, now seen corresponding path program 1 times [2024-05-12 10:34:54,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:54,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609642806] [2024-05-12 10:34:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:54,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:54,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:54,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609642806] [2024-05-12 10:34:54,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609642806] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:54,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:54,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:34:54,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085682926] [2024-05-12 10:34:54,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:54,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:34:54,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:54,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:34:54,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:34:54,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:54,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 162 transitions, 1828 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:54,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:54,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:54,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:54,894 INFO L124 PetriNetUnfolderBase]: 2535/4228 cut-off events. [2024-05-12 10:34:54,894 INFO L125 PetriNetUnfolderBase]: For 41729/41731 co-relation queries the response was YES. [2024-05-12 10:34:54,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22284 conditions, 4228 events. 2535/4228 cut-off events. For 41729/41731 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 26841 event pairs, 429 based on Foata normal form. 16/4227 useless extension candidates. Maximal degree in co-relation 22234. Up to 3174 conditions per place. [2024-05-12 10:34:54,924 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 154 selfloop transitions, 50 changer transitions 0/216 dead transitions. [2024-05-12 10:34:54,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 216 transitions, 2571 flow [2024-05-12 10:34:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:34:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:34:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 252 transitions. [2024-05-12 10:34:54,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-05-12 10:34:54,925 INFO L175 Difference]: Start difference. First operand has 114 places, 162 transitions, 1828 flow. Second operand 9 states and 252 transitions. [2024-05-12 10:34:54,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 216 transitions, 2571 flow [2024-05-12 10:34:55,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 216 transitions, 2506 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-05-12 10:34:55,004 INFO L231 Difference]: Finished difference. Result has 119 places, 165 transitions, 1930 flow [2024-05-12 10:34:55,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1930, PETRI_PLACES=119, PETRI_TRANSITIONS=165} [2024-05-12 10:34:55,005 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 69 predicate places. [2024-05-12 10:34:55,005 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 165 transitions, 1930 flow [2024-05-12 10:34:55,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:55,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:55,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:55,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 10:34:55,006 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:55,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash 950599758, now seen corresponding path program 2 times [2024-05-12 10:34:55,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:55,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832290781] [2024-05-12 10:34:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:55,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:55,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:55,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832290781] [2024-05-12 10:34:55,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832290781] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:55,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:55,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:34:55,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145491527] [2024-05-12 10:34:55,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:55,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:34:55,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:55,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:34:55,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:34:55,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:55,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 165 transitions, 1930 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:55,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:55,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:55,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:55,840 INFO L124 PetriNetUnfolderBase]: 2701/4414 cut-off events. [2024-05-12 10:34:55,840 INFO L125 PetriNetUnfolderBase]: For 46513/46515 co-relation queries the response was YES. [2024-05-12 10:34:55,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23917 conditions, 4414 events. 2701/4414 cut-off events. For 46513/46515 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28045 event pairs, 364 based on Foata normal form. 16/4413 useless extension candidates. Maximal degree in co-relation 23866. Up to 2884 conditions per place. [2024-05-12 10:34:55,878 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 157 selfloop transitions, 56 changer transitions 0/225 dead transitions. [2024-05-12 10:34:55,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 225 transitions, 2771 flow [2024-05-12 10:34:55,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:34:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:34:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 256 transitions. [2024-05-12 10:34:55,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6183574879227053 [2024-05-12 10:34:55,880 INFO L175 Difference]: Start difference. First operand has 119 places, 165 transitions, 1930 flow. Second operand 9 states and 256 transitions. [2024-05-12 10:34:55,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 225 transitions, 2771 flow [2024-05-12 10:34:55,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 225 transitions, 2634 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-05-12 10:34:55,984 INFO L231 Difference]: Finished difference. Result has 121 places, 169 transitions, 1985 flow [2024-05-12 10:34:55,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1793, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1985, PETRI_PLACES=121, PETRI_TRANSITIONS=169} [2024-05-12 10:34:55,985 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-05-12 10:34:55,985 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 169 transitions, 1985 flow [2024-05-12 10:34:55,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:55,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:55,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:55,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 10:34:55,986 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:55,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:55,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2029246670, now seen corresponding path program 1 times [2024-05-12 10:34:55,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:55,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940001657] [2024-05-12 10:34:55,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:55,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:56,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:56,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940001657] [2024-05-12 10:34:56,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940001657] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:56,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:56,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:34:56,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206075692] [2024-05-12 10:34:56,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:56,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:34:56,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:56,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:34:56,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:34:56,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:56,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 169 transitions, 1985 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:56,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:56,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:56,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:57,178 INFO L124 PetriNetUnfolderBase]: 4472/7252 cut-off events. [2024-05-12 10:34:57,178 INFO L125 PetriNetUnfolderBase]: For 88601/88603 co-relation queries the response was YES. [2024-05-12 10:34:57,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38084 conditions, 7252 events. 4472/7252 cut-off events. For 88601/88603 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 50648 event pairs, 529 based on Foata normal form. 54/7301 useless extension candidates. Maximal degree in co-relation 38032. Up to 3691 conditions per place. [2024-05-12 10:34:57,226 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 194 selfloop transitions, 49 changer transitions 0/255 dead transitions. [2024-05-12 10:34:57,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 255 transitions, 3197 flow [2024-05-12 10:34:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:34:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:34:57,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 249 transitions. [2024-05-12 10:34:57,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6766304347826086 [2024-05-12 10:34:57,227 INFO L175 Difference]: Start difference. First operand has 121 places, 169 transitions, 1985 flow. Second operand 8 states and 249 transitions. [2024-05-12 10:34:57,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 255 transitions, 3197 flow [2024-05-12 10:34:57,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 255 transitions, 3089 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-05-12 10:34:57,369 INFO L231 Difference]: Finished difference. Result has 126 places, 188 transitions, 2304 flow [2024-05-12 10:34:57,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2304, PETRI_PLACES=126, PETRI_TRANSITIONS=188} [2024-05-12 10:34:57,370 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 76 predicate places. [2024-05-12 10:34:57,370 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 188 transitions, 2304 flow [2024-05-12 10:34:57,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:57,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:57,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:57,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 10:34:57,370 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:57,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:57,371 INFO L85 PathProgramCache]: Analyzing trace with hash -906659756, now seen corresponding path program 2 times [2024-05-12 10:34:57,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:57,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599835313] [2024-05-12 10:34:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:57,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:57,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:57,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599835313] [2024-05-12 10:34:57,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599835313] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:57,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:57,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:34:57,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776223245] [2024-05-12 10:34:57,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:57,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:34:57,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:57,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:34:57,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:34:57,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:57,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 188 transitions, 2304 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:57,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:57,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:57,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:58,503 INFO L124 PetriNetUnfolderBase]: 4775/7849 cut-off events. [2024-05-12 10:34:58,503 INFO L125 PetriNetUnfolderBase]: For 103506/103508 co-relation queries the response was YES. [2024-05-12 10:34:58,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42200 conditions, 7849 events. 4775/7849 cut-off events. For 103506/103508 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 56468 event pairs, 1180 based on Foata normal form. 50/7878 useless extension candidates. Maximal degree in co-relation 42144. Up to 6070 conditions per place. [2024-05-12 10:34:58,563 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 174 selfloop transitions, 44 changer transitions 0/230 dead transitions. [2024-05-12 10:34:58,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 230 transitions, 2979 flow [2024-05-12 10:34:58,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:34:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:34:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-05-12 10:34:58,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-05-12 10:34:58,564 INFO L175 Difference]: Start difference. First operand has 126 places, 188 transitions, 2304 flow. Second operand 7 states and 208 transitions. [2024-05-12 10:34:58,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 230 transitions, 2979 flow [2024-05-12 10:34:58,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 230 transitions, 2823 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-05-12 10:34:58,749 INFO L231 Difference]: Finished difference. Result has 130 places, 191 transitions, 2322 flow [2024-05-12 10:34:58,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2322, PETRI_PLACES=130, PETRI_TRANSITIONS=191} [2024-05-12 10:34:58,750 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 80 predicate places. [2024-05-12 10:34:58,750 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 191 transitions, 2322 flow [2024-05-12 10:34:58,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:58,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:58,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:58,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 10:34:58,750 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:58,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:58,751 INFO L85 PathProgramCache]: Analyzing trace with hash -292375404, now seen corresponding path program 3 times [2024-05-12 10:34:58,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:58,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745273668] [2024-05-12 10:34:58,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:58,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:59,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:59,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745273668] [2024-05-12 10:34:59,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745273668] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:59,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:59,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:34:59,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477902608] [2024-05-12 10:34:59,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:59,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:34:59,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:59,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:34:59,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:34:59,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:59,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 191 transitions, 2322 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:59,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:59,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:59,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:59,928 INFO L124 PetriNetUnfolderBase]: 5030/8238 cut-off events. [2024-05-12 10:34:59,929 INFO L125 PetriNetUnfolderBase]: For 101912/101914 co-relation queries the response was YES. [2024-05-12 10:34:59,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42980 conditions, 8238 events. 5030/8238 cut-off events. For 101912/101914 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 60130 event pairs, 1043 based on Foata normal form. 54/8287 useless extension candidates. Maximal degree in co-relation 42922. Up to 5060 conditions per place. [2024-05-12 10:34:59,993 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 190 selfloop transitions, 45 changer transitions 0/247 dead transitions. [2024-05-12 10:34:59,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 247 transitions, 3224 flow [2024-05-12 10:34:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:34:59,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:34:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-05-12 10:34:59,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6614906832298136 [2024-05-12 10:34:59,995 INFO L175 Difference]: Start difference. First operand has 130 places, 191 transitions, 2322 flow. Second operand 7 states and 213 transitions. [2024-05-12 10:34:59,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 247 transitions, 3224 flow [2024-05-12 10:35:00,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 247 transitions, 3107 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:00,271 INFO L231 Difference]: Finished difference. Result has 133 places, 200 transitions, 2503 flow [2024-05-12 10:35:00,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2503, PETRI_PLACES=133, PETRI_TRANSITIONS=200} [2024-05-12 10:35:00,272 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 83 predicate places. [2024-05-12 10:35:00,272 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 200 transitions, 2503 flow [2024-05-12 10:35:00,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:00,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:00,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:00,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 10:35:00,272 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:00,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:00,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1881546860, now seen corresponding path program 4 times [2024-05-12 10:35:00,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:00,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945181136] [2024-05-12 10:35:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:00,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:00,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:00,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945181136] [2024-05-12 10:35:00,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945181136] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:00,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:00,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:35:00,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242563944] [2024-05-12 10:35:00,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:00,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:35:00,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:00,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:35:00,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:35:00,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:00,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 200 transitions, 2503 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:00,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:00,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:00,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:01,589 INFO L124 PetriNetUnfolderBase]: 5391/8859 cut-off events. [2024-05-12 10:35:01,589 INFO L125 PetriNetUnfolderBase]: For 117576/117578 co-relation queries the response was YES. [2024-05-12 10:35:01,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46262 conditions, 8859 events. 5391/8859 cut-off events. For 117576/117578 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 65669 event pairs, 1493 based on Foata normal form. 50/8890 useless extension candidates. Maximal degree in co-relation 46202. Up to 7012 conditions per place. [2024-05-12 10:35:01,660 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 163 selfloop transitions, 76 changer transitions 0/251 dead transitions. [2024-05-12 10:35:01,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 251 transitions, 3293 flow [2024-05-12 10:35:01,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:35:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:35:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2024-05-12 10:35:01,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6207729468599034 [2024-05-12 10:35:01,661 INFO L175 Difference]: Start difference. First operand has 133 places, 200 transitions, 2503 flow. Second operand 9 states and 257 transitions. [2024-05-12 10:35:01,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 251 transitions, 3293 flow [2024-05-12 10:35:01,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 251 transitions, 3179 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:01,943 INFO L231 Difference]: Finished difference. Result has 139 places, 202 transitions, 2616 flow [2024-05-12 10:35:01,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2616, PETRI_PLACES=139, PETRI_TRANSITIONS=202} [2024-05-12 10:35:01,944 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 89 predicate places. [2024-05-12 10:35:01,944 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 202 transitions, 2616 flow [2024-05-12 10:35:01,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:01,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:01,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:01,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 10:35:01,944 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:01,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:01,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1887053390, now seen corresponding path program 5 times [2024-05-12 10:35:01,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:01,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974616034] [2024-05-12 10:35:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:01,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:02,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:02,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974616034] [2024-05-12 10:35:02,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974616034] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:02,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:02,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:35:02,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472153375] [2024-05-12 10:35:02,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:02,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:35:02,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:02,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:35:02,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:35:02,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:02,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 202 transitions, 2616 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:02,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:02,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:02,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:03,184 INFO L124 PetriNetUnfolderBase]: 5752/9410 cut-off events. [2024-05-12 10:35:03,184 INFO L125 PetriNetUnfolderBase]: For 125931/125933 co-relation queries the response was YES. [2024-05-12 10:35:03,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49039 conditions, 9410 events. 5752/9410 cut-off events. For 125931/125933 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 70074 event pairs, 1602 based on Foata normal form. 50/9455 useless extension candidates. Maximal degree in co-relation 48977. Up to 7591 conditions per place. [2024-05-12 10:35:03,258 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 180 selfloop transitions, 71 changer transitions 0/263 dead transitions. [2024-05-12 10:35:03,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 263 transitions, 3488 flow [2024-05-12 10:35:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:35:03,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:35:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 287 transitions. [2024-05-12 10:35:03,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239130434782608 [2024-05-12 10:35:03,260 INFO L175 Difference]: Start difference. First operand has 139 places, 202 transitions, 2616 flow. Second operand 10 states and 287 transitions. [2024-05-12 10:35:03,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 263 transitions, 3488 flow [2024-05-12 10:35:03,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 263 transitions, 3283 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-05-12 10:35:03,514 INFO L231 Difference]: Finished difference. Result has 142 places, 204 transitions, 2632 flow [2024-05-12 10:35:03,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2411, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2632, PETRI_PLACES=142, PETRI_TRANSITIONS=204} [2024-05-12 10:35:03,515 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 92 predicate places. [2024-05-12 10:35:03,515 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 204 transitions, 2632 flow [2024-05-12 10:35:03,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:03,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:03,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:03,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 10:35:03,516 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:03,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:03,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1887057110, now seen corresponding path program 6 times [2024-05-12 10:35:03,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:03,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939730842] [2024-05-12 10:35:03,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:03,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:03,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:03,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939730842] [2024-05-12 10:35:03,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939730842] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:03,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:03,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:35:03,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378632721] [2024-05-12 10:35:03,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:03,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:35:03,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:03,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:35:03,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:35:03,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:03,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 204 transitions, 2632 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:03,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:03,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:03,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:04,963 INFO L124 PetriNetUnfolderBase]: 6376/10510 cut-off events. [2024-05-12 10:35:04,963 INFO L125 PetriNetUnfolderBase]: For 143872/143874 co-relation queries the response was YES. [2024-05-12 10:35:05,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53729 conditions, 10510 events. 6376/10510 cut-off events. For 143872/143874 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 80917 event pairs, 1758 based on Foata normal form. 42/10532 useless extension candidates. Maximal degree in co-relation 53666. Up to 6930 conditions per place. [2024-05-12 10:35:05,058 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 190 selfloop transitions, 74 changer transitions 0/276 dead transitions. [2024-05-12 10:35:05,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 276 transitions, 3694 flow [2024-05-12 10:35:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:35:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:35:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 292 transitions. [2024-05-12 10:35:05,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347826086956522 [2024-05-12 10:35:05,059 INFO L175 Difference]: Start difference. First operand has 142 places, 204 transitions, 2632 flow. Second operand 10 states and 292 transitions. [2024-05-12 10:35:05,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 276 transitions, 3694 flow [2024-05-12 10:35:05,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 276 transitions, 3503 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-05-12 10:35:05,389 INFO L231 Difference]: Finished difference. Result has 145 places, 209 transitions, 2749 flow [2024-05-12 10:35:05,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2441, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2749, PETRI_PLACES=145, PETRI_TRANSITIONS=209} [2024-05-12 10:35:05,389 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 95 predicate places. [2024-05-12 10:35:05,389 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 209 transitions, 2749 flow [2024-05-12 10:35:05,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:05,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:05,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:05,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 10:35:05,390 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:05,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:05,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1881331658, now seen corresponding path program 1 times [2024-05-12 10:35:05,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:05,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102996632] [2024-05-12 10:35:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:05,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:05,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:05,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102996632] [2024-05-12 10:35:05,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102996632] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:05,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:05,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:35:05,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778729955] [2024-05-12 10:35:05,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:05,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:35:05,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:05,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:35:05,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:35:05,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:05,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 209 transitions, 2749 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:05,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:05,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:05,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:06,882 INFO L124 PetriNetUnfolderBase]: 6982/11497 cut-off events. [2024-05-12 10:35:06,882 INFO L125 PetriNetUnfolderBase]: For 173825/173827 co-relation queries the response was YES. [2024-05-12 10:35:06,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59185 conditions, 11497 events. 6982/11497 cut-off events. For 173825/173827 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 90148 event pairs, 1764 based on Foata normal form. 42/11522 useless extension candidates. Maximal degree in co-relation 59120. Up to 6944 conditions per place. [2024-05-12 10:35:06,992 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 167 selfloop transitions, 89 changer transitions 0/268 dead transitions. [2024-05-12 10:35:06,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 268 transitions, 3735 flow [2024-05-12 10:35:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:35:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:35:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 263 transitions. [2024-05-12 10:35:06,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6352657004830918 [2024-05-12 10:35:06,993 INFO L175 Difference]: Start difference. First operand has 145 places, 209 transitions, 2749 flow. Second operand 9 states and 263 transitions. [2024-05-12 10:35:06,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 268 transitions, 3735 flow [2024-05-12 10:35:07,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 268 transitions, 3529 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-05-12 10:35:07,486 INFO L231 Difference]: Finished difference. Result has 147 places, 212 transitions, 2853 flow [2024-05-12 10:35:07,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2853, PETRI_PLACES=147, PETRI_TRANSITIONS=212} [2024-05-12 10:35:07,500 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 97 predicate places. [2024-05-12 10:35:07,500 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 212 transitions, 2853 flow [2024-05-12 10:35:07,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:07,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:07,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:07,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 10:35:07,501 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:07,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:07,501 INFO L85 PathProgramCache]: Analyzing trace with hash -862089738, now seen corresponding path program 7 times [2024-05-12 10:35:07,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:07,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288072928] [2024-05-12 10:35:07,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:07,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:07,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:07,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:07,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288072928] [2024-05-12 10:35:07,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288072928] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:07,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:07,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:35:07,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102727691] [2024-05-12 10:35:07,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:07,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:35:07,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:07,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:35:07,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:35:07,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:07,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 212 transitions, 2853 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:07,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:07,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:07,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:09,212 INFO L124 PetriNetUnfolderBase]: 7308/12010 cut-off events. [2024-05-12 10:35:09,213 INFO L125 PetriNetUnfolderBase]: For 187934/187936 co-relation queries the response was YES. [2024-05-12 10:35:09,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61818 conditions, 12010 events. 7308/12010 cut-off events. For 187934/187936 co-relation queries the response was YES. Maximal size of possible extension queue 862. Compared 94446 event pairs, 2294 based on Foata normal form. 50/12055 useless extension candidates. Maximal degree in co-relation 61752. Up to 9898 conditions per place. [2024-05-12 10:35:09,296 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 160 selfloop transitions, 98 changer transitions 0/270 dead transitions. [2024-05-12 10:35:09,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 270 transitions, 3791 flow [2024-05-12 10:35:09,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:35:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:35:09,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-05-12 10:35:09,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-05-12 10:35:09,298 INFO L175 Difference]: Start difference. First operand has 147 places, 212 transitions, 2853 flow. Second operand 10 states and 285 transitions. [2024-05-12 10:35:09,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 270 transitions, 3791 flow [2024-05-12 10:35:09,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 270 transitions, 3626 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:09,739 INFO L231 Difference]: Finished difference. Result has 152 places, 214 transitions, 2977 flow [2024-05-12 10:35:09,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2977, PETRI_PLACES=152, PETRI_TRANSITIONS=214} [2024-05-12 10:35:09,739 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 102 predicate places. [2024-05-12 10:35:09,739 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 214 transitions, 2977 flow [2024-05-12 10:35:09,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:09,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:09,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:09,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 10:35:09,740 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:09,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:09,740 INFO L85 PathProgramCache]: Analyzing trace with hash -861874536, now seen corresponding path program 2 times [2024-05-12 10:35:09,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:09,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29765968] [2024-05-12 10:35:09,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:09,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:10,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:10,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29765968] [2024-05-12 10:35:10,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29765968] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:10,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:10,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:35:10,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502210055] [2024-05-12 10:35:10,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:10,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:35:10,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:10,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:35:10,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:35:10,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:10,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 214 transitions, 2977 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:10,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:10,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:10,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:11,687 INFO L124 PetriNetUnfolderBase]: 7603/12553 cut-off events. [2024-05-12 10:35:11,687 INFO L125 PetriNetUnfolderBase]: For 198048/198050 co-relation queries the response was YES. [2024-05-12 10:35:11,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64664 conditions, 12553 events. 7603/12553 cut-off events. For 198048/198050 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 99841 event pairs, 2294 based on Foata normal form. 42/12590 useless extension candidates. Maximal degree in co-relation 64596. Up to 9760 conditions per place. [2024-05-12 10:35:11,776 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 164 selfloop transitions, 102 changer transitions 0/278 dead transitions. [2024-05-12 10:35:11,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 278 transitions, 3977 flow [2024-05-12 10:35:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:35:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:35:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 290 transitions. [2024-05-12 10:35:11,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:35:11,778 INFO L175 Difference]: Start difference. First operand has 152 places, 214 transitions, 2977 flow. Second operand 10 states and 290 transitions. [2024-05-12 10:35:11,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 278 transitions, 3977 flow [2024-05-12 10:35:12,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 278 transitions, 3718 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-05-12 10:35:12,266 INFO L231 Difference]: Finished difference. Result has 154 places, 216 transitions, 3017 flow [2024-05-12 10:35:12,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2718, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3017, PETRI_PLACES=154, PETRI_TRANSITIONS=216} [2024-05-12 10:35:12,266 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 104 predicate places. [2024-05-12 10:35:12,266 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 216 transitions, 3017 flow [2024-05-12 10:35:12,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:12,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:12,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:12,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 10:35:12,267 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:12,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:12,267 INFO L85 PathProgramCache]: Analyzing trace with hash -596177256, now seen corresponding path program 3 times [2024-05-12 10:35:12,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:12,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516758822] [2024-05-12 10:35:12,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:12,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:12,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:12,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516758822] [2024-05-12 10:35:12,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516758822] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:12,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:12,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:35:12,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352635337] [2024-05-12 10:35:12,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:12,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:35:12,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:12,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:35:12,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:35:12,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:12,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 216 transitions, 3017 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:12,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:12,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:12,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:14,485 INFO L124 PetriNetUnfolderBase]: 8040/13275 cut-off events. [2024-05-12 10:35:14,486 INFO L125 PetriNetUnfolderBase]: For 213194/213196 co-relation queries the response was YES. [2024-05-12 10:35:14,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67288 conditions, 13275 events. 8040/13275 cut-off events. For 213194/213196 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 106544 event pairs, 2164 based on Foata normal form. 42/13272 useless extension candidates. Maximal degree in co-relation 67219. Up to 6096 conditions per place. [2024-05-12 10:35:14,582 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 152 selfloop transitions, 119 changer transitions 0/283 dead transitions. [2024-05-12 10:35:14,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 283 transitions, 4023 flow [2024-05-12 10:35:14,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:35:14,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:35:14,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 292 transitions. [2024-05-12 10:35:14,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347826086956522 [2024-05-12 10:35:14,583 INFO L175 Difference]: Start difference. First operand has 154 places, 216 transitions, 3017 flow. Second operand 10 states and 292 transitions. [2024-05-12 10:35:14,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 283 transitions, 4023 flow [2024-05-12 10:35:15,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 283 transitions, 3750 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-05-12 10:35:15,085 INFO L231 Difference]: Finished difference. Result has 155 places, 217 transitions, 3025 flow [2024-05-12 10:35:15,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3025, PETRI_PLACES=155, PETRI_TRANSITIONS=217} [2024-05-12 10:35:15,086 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 105 predicate places. [2024-05-12 10:35:15,086 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 217 transitions, 3025 flow [2024-05-12 10:35:15,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:15,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:15,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:15,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 10:35:15,086 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:15,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:15,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2014740682, now seen corresponding path program 1 times [2024-05-12 10:35:15,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:15,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593149479] [2024-05-12 10:35:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:15,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:15,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:15,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593149479] [2024-05-12 10:35:15,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593149479] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:15,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:15,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:15,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927261997] [2024-05-12 10:35:15,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:15,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:15,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:15,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:15,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:15,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:35:15,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 217 transitions, 3025 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) [2024-05-12 10:35:15,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:15,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:35:15,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:16,899 INFO L124 PetriNetUnfolderBase]: 7654/12734 cut-off events. [2024-05-12 10:35:16,899 INFO L125 PetriNetUnfolderBase]: For 199695/199715 co-relation queries the response was YES. [2024-05-12 10:35:16,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64849 conditions, 12734 events. 7654/12734 cut-off events. For 199695/199715 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 103504 event pairs, 2596 based on Foata normal form. 7/12566 useless extension candidates. Maximal degree in co-relation 64779. Up to 11462 conditions per place. [2024-05-12 10:35:16,996 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 180 selfloop transitions, 17 changer transitions 0/232 dead transitions. [2024-05-12 10:35:16,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 232 transitions, 3453 flow [2024-05-12 10:35:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:35:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:35:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-05-12 10:35:16,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 10:35:16,997 INFO L175 Difference]: Start difference. First operand has 155 places, 217 transitions, 3025 flow. Second operand 5 states and 138 transitions. [2024-05-12 10:35:16,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 232 transitions, 3453 flow [2024-05-12 10:35:17,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 232 transitions, 3128 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-05-12 10:35:17,558 INFO L231 Difference]: Finished difference. Result has 152 places, 217 transitions, 2742 flow [2024-05-12 10:35:17,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2700, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2742, PETRI_PLACES=152, PETRI_TRANSITIONS=217} [2024-05-12 10:35:17,559 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 102 predicate places. [2024-05-12 10:35:17,559 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 217 transitions, 2742 flow [2024-05-12 10:35:17,559 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) [2024-05-12 10:35:17,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:17,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:17,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 10:35:17,560 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:17,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:17,560 INFO L85 PathProgramCache]: Analyzing trace with hash 84989918, now seen corresponding path program 1 times [2024-05-12 10:35:17,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:17,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566152915] [2024-05-12 10:35:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:17,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:17,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:17,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566152915] [2024-05-12 10:35:17,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566152915] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:17,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:17,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:35:17,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698756832] [2024-05-12 10:35:17,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:17,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:35:17,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:17,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:35:17,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:35:17,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:17,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 217 transitions, 2742 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 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) [2024-05-12 10:35:17,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:17,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:17,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:19,435 INFO L124 PetriNetUnfolderBase]: 7827/12929 cut-off events. [2024-05-12 10:35:19,435 INFO L125 PetriNetUnfolderBase]: For 181479/181481 co-relation queries the response was YES. [2024-05-12 10:35:19,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63631 conditions, 12929 events. 7827/12929 cut-off events. For 181479/181481 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 103410 event pairs, 2542 based on Foata normal form. 4/12928 useless extension candidates. Maximal degree in co-relation 63560. Up to 11725 conditions per place. [2024-05-12 10:35:19,544 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 205 selfloop transitions, 43 changer transitions 0/260 dead transitions. [2024-05-12 10:35:19,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 260 transitions, 3565 flow [2024-05-12 10:35:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:35:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:35:19,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 10:35:19,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5842391304347826 [2024-05-12 10:35:19,546 INFO L175 Difference]: Start difference. First operand has 152 places, 217 transitions, 2742 flow. Second operand 8 states and 215 transitions. [2024-05-12 10:35:19,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 260 transitions, 3565 flow [2024-05-12 10:35:19,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 260 transitions, 3507 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:19,884 INFO L231 Difference]: Finished difference. Result has 156 places, 225 transitions, 2937 flow [2024-05-12 10:35:19,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2684, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2937, PETRI_PLACES=156, PETRI_TRANSITIONS=225} [2024-05-12 10:35:19,884 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 106 predicate places. [2024-05-12 10:35:19,884 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 225 transitions, 2937 flow [2024-05-12 10:35:19,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 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) [2024-05-12 10:35:19,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:19,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:19,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 10:35:19,885 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:19,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:19,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2014971880, now seen corresponding path program 1 times [2024-05-12 10:35:19,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:19,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648194046] [2024-05-12 10:35:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:19,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:20,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:20,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648194046] [2024-05-12 10:35:20,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648194046] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:20,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:20,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:20,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483092651] [2024-05-12 10:35:20,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:20,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:20,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:20,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:20,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:20,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:20,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 225 transitions, 2937 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:20,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:20,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:20,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:21,824 INFO L124 PetriNetUnfolderBase]: 7807/12891 cut-off events. [2024-05-12 10:35:21,824 INFO L125 PetriNetUnfolderBase]: For 196776/196778 co-relation queries the response was YES. [2024-05-12 10:35:21,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65964 conditions, 12891 events. 7807/12891 cut-off events. For 196776/196778 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 102827 event pairs, 2559 based on Foata normal form. 10/12896 useless extension candidates. Maximal degree in co-relation 65892. Up to 11717 conditions per place. [2024-05-12 10:35:21,929 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 211 selfloop transitions, 38 changer transitions 0/261 dead transitions. [2024-05-12 10:35:21,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 261 transitions, 3724 flow [2024-05-12 10:35:21,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-05-12 10:35:21,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993788819875776 [2024-05-12 10:35:21,930 INFO L175 Difference]: Start difference. First operand has 156 places, 225 transitions, 2937 flow. Second operand 7 states and 193 transitions. [2024-05-12 10:35:21,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 261 transitions, 3724 flow [2024-05-12 10:35:22,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 261 transitions, 3612 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:22,390 INFO L231 Difference]: Finished difference. Result has 159 places, 229 transitions, 3008 flow [2024-05-12 10:35:22,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2826, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3008, PETRI_PLACES=159, PETRI_TRANSITIONS=229} [2024-05-12 10:35:22,391 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 109 predicate places. [2024-05-12 10:35:22,391 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 229 transitions, 3008 flow [2024-05-12 10:35:22,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:22,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:22,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:22,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 10:35:22,391 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:22,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:22,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2014965370, now seen corresponding path program 2 times [2024-05-12 10:35:22,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:22,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846464266] [2024-05-12 10:35:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:22,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:22,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:22,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846464266] [2024-05-12 10:35:22,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846464266] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:22,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:22,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:22,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745443904] [2024-05-12 10:35:22,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:22,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:22,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:22,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:22,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:22,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:22,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 229 transitions, 3008 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:22,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:22,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:22,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:24,161 INFO L124 PetriNetUnfolderBase]: 7635/12588 cut-off events. [2024-05-12 10:35:24,161 INFO L125 PetriNetUnfolderBase]: For 200191/200211 co-relation queries the response was YES. [2024-05-12 10:35:24,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64737 conditions, 12588 events. 7635/12588 cut-off events. For 200191/200211 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 99886 event pairs, 2467 based on Foata normal form. 16/12574 useless extension candidates. Maximal degree in co-relation 64663. Up to 11386 conditions per place. [2024-05-12 10:35:24,256 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 204 selfloop transitions, 38 changer transitions 0/254 dead transitions. [2024-05-12 10:35:24,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 254 transitions, 3615 flow [2024-05-12 10:35:24,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-05-12 10:35:24,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6014492753623188 [2024-05-12 10:35:24,257 INFO L175 Difference]: Start difference. First operand has 159 places, 229 transitions, 3008 flow. Second operand 6 states and 166 transitions. [2024-05-12 10:35:24,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 254 transitions, 3615 flow [2024-05-12 10:35:24,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 254 transitions, 3566 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:24,619 INFO L231 Difference]: Finished difference. Result has 161 places, 229 transitions, 3042 flow [2024-05-12 10:35:24,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3042, PETRI_PLACES=161, PETRI_TRANSITIONS=229} [2024-05-12 10:35:24,620 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 111 predicate places. [2024-05-12 10:35:24,620 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 229 transitions, 3042 flow [2024-05-12 10:35:24,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:24,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:24,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:24,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 10:35:24,621 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:24,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:24,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2014725802, now seen corresponding path program 1 times [2024-05-12 10:35:24,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:24,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303993018] [2024-05-12 10:35:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:24,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:24,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:24,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303993018] [2024-05-12 10:35:24,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303993018] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:24,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:24,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:24,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530241845] [2024-05-12 10:35:24,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:24,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:24,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:24,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:24,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:25,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:35:25,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 229 transitions, 3042 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) [2024-05-12 10:35:25,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:25,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:35:25,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:26,502 INFO L124 PetriNetUnfolderBase]: 7360/12284 cut-off events. [2024-05-12 10:35:26,502 INFO L125 PetriNetUnfolderBase]: For 214124/214166 co-relation queries the response was YES. [2024-05-12 10:35:26,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62979 conditions, 12284 events. 7360/12284 cut-off events. For 214124/214166 co-relation queries the response was YES. Maximal size of possible extension queue 893. Compared 98876 event pairs, 3821 based on Foata normal form. 50/12153 useless extension candidates. Maximal degree in co-relation 62904. Up to 10808 conditions per place. [2024-05-12 10:35:26,617 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 197 selfloop transitions, 15 changer transitions 0/250 dead transitions. [2024-05-12 10:35:26,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 250 transitions, 3548 flow [2024-05-12 10:35:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:35:26,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:35:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-05-12 10:35:26,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130434782608696 [2024-05-12 10:35:26,618 INFO L175 Difference]: Start difference. First operand has 161 places, 229 transitions, 3042 flow. Second operand 5 states and 141 transitions. [2024-05-12 10:35:26,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 250 transitions, 3548 flow [2024-05-12 10:35:27,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 250 transitions, 3411 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-05-12 10:35:27,249 INFO L231 Difference]: Finished difference. Result has 160 places, 231 transitions, 2969 flow [2024-05-12 10:35:27,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2969, PETRI_PLACES=160, PETRI_TRANSITIONS=231} [2024-05-12 10:35:27,249 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 110 predicate places. [2024-05-12 10:35:27,249 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 231 transitions, 2969 flow [2024-05-12 10:35:27,249 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) [2024-05-12 10:35:27,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:27,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:27,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 10:35:27,250 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:27,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:27,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1660278718, now seen corresponding path program 1 times [2024-05-12 10:35:27,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:27,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826685882] [2024-05-12 10:35:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:27,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:27,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:27,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826685882] [2024-05-12 10:35:27,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826685882] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:27,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:27,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:35:27,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42578830] [2024-05-12 10:35:27,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:27,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:35:27,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:27,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:35:27,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:35:27,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:27,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 231 transitions, 2969 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:27,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:27,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:27,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:29,146 INFO L124 PetriNetUnfolderBase]: 7706/12634 cut-off events. [2024-05-12 10:35:29,146 INFO L125 PetriNetUnfolderBase]: For 198828/198830 co-relation queries the response was YES. [2024-05-12 10:35:29,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64662 conditions, 12634 events. 7706/12634 cut-off events. For 198828/198830 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 99541 event pairs, 2440 based on Foata normal form. 4/12633 useless extension candidates. Maximal degree in co-relation 64586. Up to 11465 conditions per place. [2024-05-12 10:35:29,233 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 209 selfloop transitions, 47 changer transitions 0/268 dead transitions. [2024-05-12 10:35:29,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 268 transitions, 3630 flow [2024-05-12 10:35:29,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:35:29,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:35:29,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-05-12 10:35:29,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572463768115942 [2024-05-12 10:35:29,234 INFO L175 Difference]: Start difference. First operand has 160 places, 231 transitions, 2969 flow. Second operand 9 states and 237 transitions. [2024-05-12 10:35:29,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 268 transitions, 3630 flow [2024-05-12 10:35:29,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 268 transitions, 3588 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:29,666 INFO L231 Difference]: Finished difference. Result has 166 places, 231 transitions, 3028 flow [2024-05-12 10:35:29,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2927, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3028, PETRI_PLACES=166, PETRI_TRANSITIONS=231} [2024-05-12 10:35:29,667 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 116 predicate places. [2024-05-12 10:35:29,667 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 231 transitions, 3028 flow [2024-05-12 10:35:29,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:29,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:29,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:29,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 10:35:29,667 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:29,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:29,668 INFO L85 PathProgramCache]: Analyzing trace with hash 782685597, now seen corresponding path program 1 times [2024-05-12 10:35:29,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:29,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835009966] [2024-05-12 10:35:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:29,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:29,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:29,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835009966] [2024-05-12 10:35:29,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835009966] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:29,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:29,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:35:29,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226875613] [2024-05-12 10:35:29,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:29,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:35:29,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:29,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:35:29,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:35:29,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:29,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 231 transitions, 3028 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:29,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:29,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:29,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:31,773 INFO L124 PetriNetUnfolderBase]: 7717/12651 cut-off events. [2024-05-12 10:35:31,774 INFO L125 PetriNetUnfolderBase]: For 208065/208067 co-relation queries the response was YES. [2024-05-12 10:35:31,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65281 conditions, 12651 events. 7717/12651 cut-off events. For 208065/208067 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 99772 event pairs, 2428 based on Foata normal form. 3/12649 useless extension candidates. Maximal degree in co-relation 65204. Up to 11361 conditions per place. [2024-05-12 10:35:31,863 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 207 selfloop transitions, 64 changer transitions 0/283 dead transitions. [2024-05-12 10:35:31,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 283 transitions, 4117 flow [2024-05-12 10:35:31,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:35:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:35:31,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-05-12 10:35:31,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 10:35:31,865 INFO L175 Difference]: Start difference. First operand has 166 places, 231 transitions, 3028 flow. Second operand 9 states and 243 transitions. [2024-05-12 10:35:31,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 283 transitions, 4117 flow [2024-05-12 10:35:32,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 283 transitions, 3981 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-05-12 10:35:32,320 INFO L231 Difference]: Finished difference. Result has 168 places, 240 transitions, 3250 flow [2024-05-12 10:35:32,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3250, PETRI_PLACES=168, PETRI_TRANSITIONS=240} [2024-05-12 10:35:32,321 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 118 predicate places. [2024-05-12 10:35:32,321 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 240 transitions, 3250 flow [2024-05-12 10:35:32,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:32,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:32,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:32,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 10:35:32,321 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:32,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:32,322 INFO L85 PathProgramCache]: Analyzing trace with hash 70954557, now seen corresponding path program 2 times [2024-05-12 10:35:32,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:32,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17835040] [2024-05-12 10:35:32,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:32,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:32,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:32,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17835040] [2024-05-12 10:35:32,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17835040] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:32,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:32,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:35:32,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920961714] [2024-05-12 10:35:32,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:32,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:35:32,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:32,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:35:32,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:35:32,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:32,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 240 transitions, 3250 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:32,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:32,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:32,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:34,329 INFO L124 PetriNetUnfolderBase]: 7714/13342 cut-off events. [2024-05-12 10:35:34,330 INFO L125 PetriNetUnfolderBase]: For 227750/227752 co-relation queries the response was YES. [2024-05-12 10:35:34,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67974 conditions, 13342 events. 7714/13342 cut-off events. For 227750/227752 co-relation queries the response was YES. Maximal size of possible extension queue 930. Compared 109785 event pairs, 2865 based on Foata normal form. 3/13328 useless extension candidates. Maximal degree in co-relation 67895. Up to 11359 conditions per place. [2024-05-12 10:35:34,430 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 203 selfloop transitions, 64 changer transitions 0/279 dead transitions. [2024-05-12 10:35:34,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 279 transitions, 4073 flow [2024-05-12 10:35:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:35:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:35:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-05-12 10:35:34,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748792270531401 [2024-05-12 10:35:34,431 INFO L175 Difference]: Start difference. First operand has 168 places, 240 transitions, 3250 flow. Second operand 9 states and 238 transitions. [2024-05-12 10:35:34,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 279 transitions, 4073 flow [2024-05-12 10:35:34,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 279 transitions, 3899 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:34,973 INFO L231 Difference]: Finished difference. Result has 173 places, 240 transitions, 3210 flow [2024-05-12 10:35:34,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3076, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3210, PETRI_PLACES=173, PETRI_TRANSITIONS=240} [2024-05-12 10:35:34,974 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 123 predicate places. [2024-05-12 10:35:34,974 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 240 transitions, 3210 flow [2024-05-12 10:35:34,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:34,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:34,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:34,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 10:35:34,974 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:34,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:34,975 INFO L85 PathProgramCache]: Analyzing trace with hash 642295799, now seen corresponding path program 1 times [2024-05-12 10:35:34,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:34,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890596322] [2024-05-12 10:35:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:34,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:35,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:35,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890596322] [2024-05-12 10:35:35,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890596322] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:35,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:35,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:35,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92314246] [2024-05-12 10:35:35,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:35,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:35,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:35,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:35,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:35,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:35,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 240 transitions, 3210 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:35,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:35,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:35,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:37,081 INFO L124 PetriNetUnfolderBase]: 7736/12682 cut-off events. [2024-05-12 10:35:37,082 INFO L125 PetriNetUnfolderBase]: For 227961/227963 co-relation queries the response was YES. [2024-05-12 10:35:37,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67091 conditions, 12682 events. 7736/12682 cut-off events. For 227961/227963 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 100393 event pairs, 2435 based on Foata normal form. 4/12681 useless extension candidates. Maximal degree in co-relation 67010. Up to 11441 conditions per place. [2024-05-12 10:35:37,172 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 216 selfloop transitions, 54 changer transitions 0/282 dead transitions. [2024-05-12 10:35:37,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 282 transitions, 4129 flow [2024-05-12 10:35:37,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:35:37,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:35:37,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-05-12 10:35:37,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5896739130434783 [2024-05-12 10:35:37,173 INFO L175 Difference]: Start difference. First operand has 173 places, 240 transitions, 3210 flow. Second operand 8 states and 217 transitions. [2024-05-12 10:35:37,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 282 transitions, 4129 flow [2024-05-12 10:35:37,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 282 transitions, 3972 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-05-12 10:35:37,832 INFO L231 Difference]: Finished difference. Result has 173 places, 246 transitions, 3263 flow [2024-05-12 10:35:37,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3065, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3263, PETRI_PLACES=173, PETRI_TRANSITIONS=246} [2024-05-12 10:35:37,833 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 123 predicate places. [2024-05-12 10:35:37,833 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 246 transitions, 3263 flow [2024-05-12 10:35:37,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:37,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:37,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:37,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 10:35:37,833 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:37,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:37,834 INFO L85 PathProgramCache]: Analyzing trace with hash 870196949, now seen corresponding path program 2 times [2024-05-12 10:35:37,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:37,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663440599] [2024-05-12 10:35:37,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:37,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:38,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:38,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663440599] [2024-05-12 10:35:38,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663440599] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:38,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:38,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:38,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830214977] [2024-05-12 10:35:38,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:38,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:38,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:38,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:38,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:38,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:38,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 246 transitions, 3263 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:38,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:38,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:38,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:39,803 INFO L124 PetriNetUnfolderBase]: 7747/12742 cut-off events. [2024-05-12 10:35:39,803 INFO L125 PetriNetUnfolderBase]: For 237478/237498 co-relation queries the response was YES. [2024-05-12 10:35:39,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67432 conditions, 12742 events. 7747/12742 cut-off events. For 237478/237498 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 100897 event pairs, 2471 based on Foata normal form. 15/12727 useless extension candidates. Maximal degree in co-relation 67350. Up to 11449 conditions per place. [2024-05-12 10:35:39,901 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 211 selfloop transitions, 57 changer transitions 0/280 dead transitions. [2024-05-12 10:35:39,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 280 transitions, 4197 flow [2024-05-12 10:35:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:39,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:39,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 10:35:39,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593167701863354 [2024-05-12 10:35:39,902 INFO L175 Difference]: Start difference. First operand has 173 places, 246 transitions, 3263 flow. Second operand 7 states and 191 transitions. [2024-05-12 10:35:39,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 280 transitions, 4197 flow [2024-05-12 10:35:40,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 280 transitions, 4127 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:40,441 INFO L231 Difference]: Finished difference. Result has 176 places, 249 transitions, 3360 flow [2024-05-12 10:35:40,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3195, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3360, PETRI_PLACES=176, PETRI_TRANSITIONS=249} [2024-05-12 10:35:40,441 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 126 predicate places. [2024-05-12 10:35:40,441 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 249 transitions, 3360 flow [2024-05-12 10:35:40,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:40,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:40,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:40,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 10:35:40,442 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:40,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:40,442 INFO L85 PathProgramCache]: Analyzing trace with hash -777073057, now seen corresponding path program 3 times [2024-05-12 10:35:40,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:40,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333242610] [2024-05-12 10:35:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:40,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:40,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:40,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333242610] [2024-05-12 10:35:40,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333242610] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:40,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:40,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:40,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030613133] [2024-05-12 10:35:40,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:40,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:40,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:40,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:40,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:40,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:40,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 249 transitions, 3360 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:40,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:40,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:40,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:42,545 INFO L124 PetriNetUnfolderBase]: 7744/12730 cut-off events. [2024-05-12 10:35:42,545 INFO L125 PetriNetUnfolderBase]: For 247165/247185 co-relation queries the response was YES. [2024-05-12 10:35:42,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67697 conditions, 12730 events. 7744/12730 cut-off events. For 247165/247185 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 100876 event pairs, 2464 based on Foata normal form. 15/12715 useless extension candidates. Maximal degree in co-relation 67614. Up to 11447 conditions per place. [2024-05-12 10:35:42,635 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 208 selfloop transitions, 59 changer transitions 0/279 dead transitions. [2024-05-12 10:35:42,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 279 transitions, 4175 flow [2024-05-12 10:35:42,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:42,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 10:35:42,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593167701863354 [2024-05-12 10:35:42,636 INFO L175 Difference]: Start difference. First operand has 176 places, 249 transitions, 3360 flow. Second operand 7 states and 191 transitions. [2024-05-12 10:35:42,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 279 transitions, 4175 flow [2024-05-12 10:35:43,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 279 transitions, 3995 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-05-12 10:35:43,249 INFO L231 Difference]: Finished difference. Result has 177 places, 249 transitions, 3304 flow [2024-05-12 10:35:43,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3180, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3304, PETRI_PLACES=177, PETRI_TRANSITIONS=249} [2024-05-12 10:35:43,250 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 127 predicate places. [2024-05-12 10:35:43,250 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 249 transitions, 3304 flow [2024-05-12 10:35:43,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:43,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:43,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:43,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 10:35:43,251 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:43,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:43,251 INFO L85 PathProgramCache]: Analyzing trace with hash 476613137, now seen corresponding path program 1 times [2024-05-12 10:35:43,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:43,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014283158] [2024-05-12 10:35:43,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:43,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:43,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:43,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014283158] [2024-05-12 10:35:43,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014283158] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:43,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:43,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:43,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840574266] [2024-05-12 10:35:43,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:43,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:43,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:43,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:43,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:43,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:35:43,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 249 transitions, 3304 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) [2024-05-12 10:35:43,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:43,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:35:43,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:45,236 INFO L124 PetriNetUnfolderBase]: 7448/12432 cut-off events. [2024-05-12 10:35:45,237 INFO L125 PetriNetUnfolderBase]: For 261613/261654 co-relation queries the response was YES. [2024-05-12 10:35:45,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65920 conditions, 12432 events. 7448/12432 cut-off events. For 261613/261654 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 100324 event pairs, 3926 based on Foata normal form. 42/12290 useless extension candidates. Maximal degree in co-relation 65836. Up to 10970 conditions per place. [2024-05-12 10:35:45,347 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 210 selfloop transitions, 18 changer transitions 0/272 dead transitions. [2024-05-12 10:35:45,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 272 transitions, 3842 flow [2024-05-12 10:35:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:45,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:45,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-05-12 10:35:45,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5905797101449275 [2024-05-12 10:35:45,348 INFO L175 Difference]: Start difference. First operand has 177 places, 249 transitions, 3304 flow. Second operand 6 states and 163 transitions. [2024-05-12 10:35:45,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 272 transitions, 3842 flow [2024-05-12 10:35:45,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 272 transitions, 3723 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:45,955 INFO L231 Difference]: Finished difference. Result has 178 places, 250 transitions, 3243 flow [2024-05-12 10:35:45,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3185, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3243, PETRI_PLACES=178, PETRI_TRANSITIONS=250} [2024-05-12 10:35:45,956 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 128 predicate places. [2024-05-12 10:35:45,956 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 250 transitions, 3243 flow [2024-05-12 10:35:45,956 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) [2024-05-12 10:35:45,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:45,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:45,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 10:35:45,956 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:45,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:45,957 INFO L85 PathProgramCache]: Analyzing trace with hash 878776757, now seen corresponding path program 2 times [2024-05-12 10:35:45,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:45,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862047665] [2024-05-12 10:35:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:45,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:46,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:46,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862047665] [2024-05-12 10:35:46,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862047665] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:46,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:46,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:46,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235970797] [2024-05-12 10:35:46,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:46,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:46,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:46,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:46,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:46,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:35:46,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 250 transitions, 3243 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) [2024-05-12 10:35:46,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:46,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:35:46,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:47,849 INFO L124 PetriNetUnfolderBase]: 7454/12430 cut-off events. [2024-05-12 10:35:47,849 INFO L125 PetriNetUnfolderBase]: For 266599/266640 co-relation queries the response was YES. [2024-05-12 10:35:47,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65814 conditions, 12430 events. 7454/12430 cut-off events. For 266599/266640 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 100269 event pairs, 3818 based on Foata normal form. 41/12287 useless extension candidates. Maximal degree in co-relation 65729. Up to 10812 conditions per place. [2024-05-12 10:35:47,961 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 211 selfloop transitions, 21 changer transitions 0/276 dead transitions. [2024-05-12 10:35:47,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 276 transitions, 3807 flow [2024-05-12 10:35:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-05-12 10:35:47,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-05-12 10:35:47,963 INFO L175 Difference]: Start difference. First operand has 178 places, 250 transitions, 3243 flow. Second operand 6 states and 165 transitions. [2024-05-12 10:35:47,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 276 transitions, 3807 flow [2024-05-12 10:35:48,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 276 transitions, 3765 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:48,799 INFO L231 Difference]: Finished difference. Result has 180 places, 251 transitions, 3265 flow [2024-05-12 10:35:48,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3201, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3265, PETRI_PLACES=180, PETRI_TRANSITIONS=251} [2024-05-12 10:35:48,799 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 130 predicate places. [2024-05-12 10:35:48,799 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 251 transitions, 3265 flow [2024-05-12 10:35:48,800 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) [2024-05-12 10:35:48,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:48,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:48,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 10:35:48,800 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:48,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:48,800 INFO L85 PathProgramCache]: Analyzing trace with hash 68106525, now seen corresponding path program 1 times [2024-05-12 10:35:48,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:48,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51360578] [2024-05-12 10:35:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:48,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:49,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:49,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51360578] [2024-05-12 10:35:49,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51360578] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:49,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:49,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:35:49,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415844715] [2024-05-12 10:35:49,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:49,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:35:49,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:49,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:35:49,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:35:49,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:49,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 251 transitions, 3265 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:49,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:49,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:49,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:50,684 INFO L124 PetriNetUnfolderBase]: 7903/12923 cut-off events. [2024-05-12 10:35:50,685 INFO L125 PetriNetUnfolderBase]: For 282834/282836 co-relation queries the response was YES. [2024-05-12 10:35:50,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69716 conditions, 12923 events. 7903/12923 cut-off events. For 282834/282836 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 102094 event pairs, 2195 based on Foata normal form. 6/12924 useless extension candidates. Maximal degree in co-relation 69630. Up to 11254 conditions per place. [2024-05-12 10:35:50,802 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 232 selfloop transitions, 59 changer transitions 0/303 dead transitions. [2024-05-12 10:35:50,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 303 transitions, 4286 flow [2024-05-12 10:35:50,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:35:50,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:35:50,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-05-12 10:35:50,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5917874396135265 [2024-05-12 10:35:50,807 INFO L175 Difference]: Start difference. First operand has 180 places, 251 transitions, 3265 flow. Second operand 9 states and 245 transitions. [2024-05-12 10:35:50,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 303 transitions, 4286 flow