./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe012_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe012_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe012_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 16:01:40,255 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:01:40,328 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:01:40,337 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:01:40,338 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:01:40,368 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:01:40,369 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:01:40,369 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:01:40,370 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:01:40,371 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:01:40,372 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:01:40,372 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:01:40,373 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:01:40,373 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:01:40,373 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:01:40,374 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:01:40,374 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:01:40,374 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:01:40,375 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:01:40,375 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:01:40,375 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:01:40,376 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:01:40,376 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:01:40,376 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:01:40,377 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:01:40,377 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:01:40,377 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:01:40,378 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:01:40,378 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:01:40,378 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:01:40,379 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:01:40,380 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:01:40,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:01:40,380 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:01:40,381 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:01:40,381 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:01:40,381 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:01:40,381 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:01:40,381 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:01:40,382 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:01:40,382 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:01:40,382 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:01:40,382 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:01:40,383 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:01:40,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:01:40,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:01:40,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:01:40,684 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:01:40,685 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:01:40,686 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe012_tso.yml/witness.yml [2024-06-04 16:01:40,853 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:01:40,856 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:01:40,856 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_tso.i [2024-06-04 16:01:42,083 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:01:42,344 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:01:42,345 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_tso.i [2024-06-04 16:01:42,363 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e95e2a010/32b5c156c50e4f7e9a410d1822bde403/FLAG399e448df [2024-06-04 16:01:42,375 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e95e2a010/32b5c156c50e4f7e9a410d1822bde403 [2024-06-04 16:01:42,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:01:42,377 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:01:42,378 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:01:42,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:01:42,383 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:01:42,384 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:01:40" (1/2) ... [2024-06-04 16:01:42,385 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@519674e8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:42, skipping insertion in model container [2024-06-04 16:01:42,385 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:01:40" (1/2) ... [2024-06-04 16:01:42,386 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@61a9e783 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:42, skipping insertion in model container [2024-06-04 16:01:42,386 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:01:42" (2/2) ... [2024-06-04 16:01:42,387 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@519674e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:42, skipping insertion in model container [2024-06-04 16:01:42,387 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:01:42" (2/2) ... [2024-06-04 16:01:42,387 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:01:42,465 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:01:42,466 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 16:01:42,466 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 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$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 16:01:42,467 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 16:01:42,467 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:01:42,467 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-04 16:01:42,509 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:01:42,809 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:01:42,827 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:01:42,977 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:01:43,012 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:01:43,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:43 WrapperNode [2024-06-04 16:01:43,013 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:01:43,014 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:01:43,014 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:01:43,014 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:01:43,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:43" (1/1) ... [2024-06-04 16:01:43,035 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:43" (1/1) ... [2024-06-04 16:01:43,081 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-04 16:01:43,082 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:01:43,083 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:01:43,083 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:01:43,083 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:01:43,092 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:43" (1/1) ... [2024-06-04 16:01:43,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:43" (1/1) ... [2024-06-04 16:01:43,095 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:43" (1/1) ... [2024-06-04 16:01:43,109 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 16:01:43,109 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:43" (1/1) ... [2024-06-04 16:01:43,109 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:43" (1/1) ... [2024-06-04 16:01:43,116 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:43" (1/1) ... [2024-06-04 16:01:43,119 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:43" (1/1) ... [2024-06-04 16:01:43,121 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:43" (1/1) ... [2024-06-04 16:01:43,122 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:43" (1/1) ... [2024-06-04 16:01:43,125 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:01:43,126 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:01:43,126 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:01:43,127 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:01:43,127 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:43" (1/1) ... [2024-06-04 16:01:43,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:01:43,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:01:43,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 16:01:43,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 16:01:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:01:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:01:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:01:43,214 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:01:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:01:43,215 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:01:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 16:01:43,216 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 16:01:43,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:01:43,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:01:43,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:01:43,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:01:43,218 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 16:01:43,368 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:01:43,370 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:01:43,715 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:01:43,715 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:01:43,826 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:01:43,826 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:01:43,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:01:43 BoogieIcfgContainer [2024-06-04 16:01:43,827 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:01:43,829 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:01:43,830 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:01:43,832 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:01:43,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:01:40" (1/4) ... [2024-06-04 16:01:43,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44bf472f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:01:43, skipping insertion in model container [2024-06-04 16:01:43,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:01:42" (2/4) ... [2024-06-04 16:01:43,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44bf472f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:01:43, skipping insertion in model container [2024-06-04 16:01:43,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:43" (3/4) ... [2024-06-04 16:01:43,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44bf472f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:01:43, skipping insertion in model container [2024-06-04 16:01:43,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:01:43" (4/4) ... [2024-06-04 16:01:43,835 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_tso.i [2024-06-04 16:01:43,852 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:01:43,852 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 16:01:43,852 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:01:43,905 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:01:43,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 16:01:43,976 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-04 16:01:43,976 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:01:43,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 16:01:43,979 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 16:01:43,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-04 16:01:43,995 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:01:44,001 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;@7775430c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:01:44,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 16:01:44,009 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:01:44,009 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:01:44,010 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:01:44,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:44,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:01:44,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:44,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:44,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1786995326, now seen corresponding path program 1 times [2024-06-04 16:01:44,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:44,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219370496] [2024-06-04 16:01:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:44,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:44,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:44,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219370496] [2024-06-04 16:01:44,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219370496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:44,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:44,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:01:44,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749786302] [2024-06-04 16:01:44,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:44,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:01:44,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:44,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:01:44,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:01:44,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-04 16:01:44,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:44,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:44,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-04 16:01:44,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:45,233 INFO L124 PetriNetUnfolderBase]: 430/730 cut-off events. [2024-06-04 16:01:45,234 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-04 16:01:45,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 730 events. 430/730 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3662 event pairs, 241 based on Foata normal form. 1/693 useless extension candidates. Maximal degree in co-relation 1440. Up to 672 conditions per place. [2024-06-04 16:01:45,248 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 29 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-04 16:01:45,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 165 flow [2024-06-04 16:01:45,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:01:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:01:45,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-04 16:01:45,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-04 16:01:45,262 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 84 transitions. [2024-06-04 16:01:45,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 165 flow [2024-06-04 16:01:45,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:45,268 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-04 16:01:45,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-04 16:01:45,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-04 16:01:45,274 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-04 16:01:45,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:45,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:45,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:45,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:01:45,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:45,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:45,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2051141202, now seen corresponding path program 1 times [2024-06-04 16:01:45,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:45,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692128644] [2024-06-04 16:01:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:45,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:45,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:45,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692128644] [2024-06-04 16:01:45,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692128644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:45,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:45,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:45,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962049242] [2024-06-04 16:01:45,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:45,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:45,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:45,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:45,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:45,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:45,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:45,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:45,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:45,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:46,100 INFO L124 PetriNetUnfolderBase]: 755/1248 cut-off events. [2024-06-04 16:01:46,101 INFO L125 PetriNetUnfolderBase]: For 222/236 co-relation queries the response was YES. [2024-06-04 16:01:46,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2843 conditions, 1248 events. 755/1248 cut-off events. For 222/236 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6082 event pairs, 249 based on Foata normal form. 13/1224 useless extension candidates. Maximal degree in co-relation 2828. Up to 1093 conditions per place. [2024-06-04 16:01:46,109 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 37 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2024-06-04 16:01:46,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 224 flow [2024-06-04 16:01:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:46,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:46,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-04 16:01:46,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-04 16:01:46,112 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 102 transitions. [2024-06-04 16:01:46,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 224 flow [2024-06-04 16:01:46,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:01:46,114 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 123 flow [2024-06-04 16:01:46,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-04 16:01:46,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-06-04 16:01:46,115 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 123 flow [2024-06-04 16:01:46,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:46,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:46,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:46,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:01:46,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:46,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:46,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1294877559, now seen corresponding path program 1 times [2024-06-04 16:01:46,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:46,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123159533] [2024-06-04 16:01:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:46,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:46,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:46,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123159533] [2024-06-04 16:01:46,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123159533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:46,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:46,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:01:46,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826204058] [2024-06-04 16:01:46,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:46,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:01:46,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:46,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:01:46,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:01:46,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:01:46,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:46,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:46,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:01:46,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:46,698 INFO L124 PetriNetUnfolderBase]: 583/984 cut-off events. [2024-06-04 16:01:46,698 INFO L125 PetriNetUnfolderBase]: For 494/497 co-relation queries the response was YES. [2024-06-04 16:01:46,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2454 conditions, 984 events. 583/984 cut-off events. For 494/497 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4826 event pairs, 249 based on Foata normal form. 4/986 useless extension candidates. Maximal degree in co-relation 2437. Up to 889 conditions per place. [2024-06-04 16:01:46,708 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-04 16:01:46,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 265 flow [2024-06-04 16:01:46,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:46,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-04 16:01:46,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-04 16:01:46,713 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 123 flow. Second operand 4 states and 102 transitions. [2024-06-04 16:01:46,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 265 flow [2024-06-04 16:01:46,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 248 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:46,718 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 166 flow [2024-06-04 16:01:46,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-04 16:01:46,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-06-04 16:01:46,719 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 166 flow [2024-06-04 16:01:46,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:46,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:46,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:46,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:01:46,720 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:46,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:46,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1486499389, now seen corresponding path program 1 times [2024-06-04 16:01:46,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:46,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532990184] [2024-06-04 16:01:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:46,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:47,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:47,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532990184] [2024-06-04 16:01:47,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532990184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:47,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:47,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:47,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173441028] [2024-06-04 16:01:47,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:47,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:47,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:47,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:47,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:47,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:47,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:47,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:47,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:47,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:47,498 INFO L124 PetriNetUnfolderBase]: 697/1162 cut-off events. [2024-06-04 16:01:47,499 INFO L125 PetriNetUnfolderBase]: For 899/899 co-relation queries the response was YES. [2024-06-04 16:01:47,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3175 conditions, 1162 events. 697/1162 cut-off events. For 899/899 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5759 event pairs, 304 based on Foata normal form. 2/1163 useless extension candidates. Maximal degree in co-relation 3156. Up to 1047 conditions per place. [2024-06-04 16:01:47,507 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-04 16:01:47,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 66 transitions, 357 flow [2024-06-04 16:01:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-04 16:01:47,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:01:47,509 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 166 flow. Second operand 5 states and 120 transitions. [2024-06-04 16:01:47,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 66 transitions, 357 flow [2024-06-04 16:01:47,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 66 transitions, 353 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:47,512 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 247 flow [2024-06-04 16:01:47,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-06-04 16:01:47,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-04 16:01:47,513 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 247 flow [2024-06-04 16:01:47,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:47,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:47,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:47,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:01:47,514 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:47,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:47,515 INFO L85 PathProgramCache]: Analyzing trace with hash 609729492, now seen corresponding path program 1 times [2024-06-04 16:01:47,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:47,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768112230] [2024-06-04 16:01:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:47,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:47,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:47,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768112230] [2024-06-04 16:01:47,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768112230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:47,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:47,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:47,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750426858] [2024-06-04 16:01:47,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:47,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:47,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:47,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:47,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:47,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:47,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 247 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:47,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:47,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:47,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:48,258 INFO L124 PetriNetUnfolderBase]: 845/1411 cut-off events. [2024-06-04 16:01:48,259 INFO L125 PetriNetUnfolderBase]: For 1978/2016 co-relation queries the response was YES. [2024-06-04 16:01:48,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4317 conditions, 1411 events. 845/1411 cut-off events. For 1978/2016 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7049 event pairs, 287 based on Foata normal form. 9/1401 useless extension candidates. Maximal degree in co-relation 4293. Up to 1212 conditions per place. [2024-06-04 16:01:48,269 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 15 changer transitions 0/67 dead transitions. [2024-06-04 16:01:48,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 409 flow [2024-06-04 16:01:48,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:48,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-04 16:01:48,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-04 16:01:48,270 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 247 flow. Second operand 4 states and 103 transitions. [2024-06-04 16:01:48,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 409 flow [2024-06-04 16:01:48,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 407 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:48,275 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 312 flow [2024-06-04 16:01:48,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-04 16:01:48,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-04 16:01:48,276 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 312 flow [2024-06-04 16:01:48,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:48,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:48,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:48,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:01:48,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:48,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:48,278 INFO L85 PathProgramCache]: Analyzing trace with hash 630405252, now seen corresponding path program 2 times [2024-06-04 16:01:48,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:48,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481390286] [2024-06-04 16:01:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:48,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:48,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:48,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481390286] [2024-06-04 16:01:48,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481390286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:48,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:48,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:48,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749146113] [2024-06-04 16:01:48,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:48,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:48,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:48,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:48,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:48,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:48,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:48,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:48,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:48,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:48,959 INFO L124 PetriNetUnfolderBase]: 840/1406 cut-off events. [2024-06-04 16:01:48,959 INFO L125 PetriNetUnfolderBase]: For 3058/3101 co-relation queries the response was YES. [2024-06-04 16:01:48,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4758 conditions, 1406 events. 840/1406 cut-off events. For 3058/3101 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7030 event pairs, 287 based on Foata normal form. 11/1399 useless extension candidates. Maximal degree in co-relation 4731. Up to 1194 conditions per place. [2024-06-04 16:01:48,972 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 46 selfloop transitions, 18 changer transitions 0/74 dead transitions. [2024-06-04 16:01:48,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 74 transitions, 504 flow [2024-06-04 16:01:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:48,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:48,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-04 16:01:48,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-04 16:01:48,974 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 312 flow. Second operand 5 states and 124 transitions. [2024-06-04 16:01:48,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 74 transitions, 504 flow [2024-06-04 16:01:48,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 467 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:48,980 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 348 flow [2024-06-04 16:01:48,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=348, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-04 16:01:48,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-04 16:01:48,981 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 348 flow [2024-06-04 16:01:48,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:48,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:48,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:48,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:01:48,982 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:48,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:48,982 INFO L85 PathProgramCache]: Analyzing trace with hash 22549742, now seen corresponding path program 1 times [2024-06-04 16:01:48,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:48,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162904845] [2024-06-04 16:01:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:48,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:49,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:49,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162904845] [2024-06-04 16:01:49,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162904845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:49,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:49,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:49,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560069688] [2024-06-04 16:01:49,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:49,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:49,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:49,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:49,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:49,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:49,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 348 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:49,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:49,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:49,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:49,684 INFO L124 PetriNetUnfolderBase]: 697/1170 cut-off events. [2024-06-04 16:01:49,685 INFO L125 PetriNetUnfolderBase]: For 2545/2545 co-relation queries the response was YES. [2024-06-04 16:01:49,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4011 conditions, 1170 events. 697/1170 cut-off events. For 2545/2545 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5872 event pairs, 274 based on Foata normal form. 4/1173 useless extension candidates. Maximal degree in co-relation 3983. Up to 1029 conditions per place. [2024-06-04 16:01:49,695 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 60 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-06-04 16:01:49,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 552 flow [2024-06-04 16:01:49,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 16:01:49,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-04 16:01:49,697 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 348 flow. Second operand 6 states and 141 transitions. [2024-06-04 16:01:49,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 552 flow [2024-06-04 16:01:49,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 79 transitions, 509 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:49,702 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 350 flow [2024-06-04 16:01:49,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=350, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-04 16:01:49,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-04 16:01:49,703 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 350 flow [2024-06-04 16:01:49,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:49,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:49,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:49,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:01:49,704 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:49,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:49,705 INFO L85 PathProgramCache]: Analyzing trace with hash -508420352, now seen corresponding path program 1 times [2024-06-04 16:01:49,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:49,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077419362] [2024-06-04 16:01:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:49,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:50,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:50,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077419362] [2024-06-04 16:01:50,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077419362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:50,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:50,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:50,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039845163] [2024-06-04 16:01:50,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:50,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:50,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:50,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:50,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:50,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:50,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 350 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:50,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:50,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:50,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:50,399 INFO L124 PetriNetUnfolderBase]: 888/1469 cut-off events. [2024-06-04 16:01:50,399 INFO L125 PetriNetUnfolderBase]: For 3704/3704 co-relation queries the response was YES. [2024-06-04 16:01:50,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5127 conditions, 1469 events. 888/1469 cut-off events. For 3704/3704 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7189 event pairs, 310 based on Foata normal form. 2/1470 useless extension candidates. Maximal degree in co-relation 5098. Up to 1253 conditions per place. [2024-06-04 16:01:50,412 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 18 changer transitions 0/86 dead transitions. [2024-06-04 16:01:50,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 86 transitions, 608 flow [2024-06-04 16:01:50,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-04 16:01:50,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-04 16:01:50,417 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 350 flow. Second operand 5 states and 122 transitions. [2024-06-04 16:01:50,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 86 transitions, 608 flow [2024-06-04 16:01:50,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 86 transitions, 581 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:50,427 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 453 flow [2024-06-04 16:01:50,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-04 16:01:50,429 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-04 16:01:50,429 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 453 flow [2024-06-04 16:01:50,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:50,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:50,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:50,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:01:50,431 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:50,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:50,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1932267364, now seen corresponding path program 2 times [2024-06-04 16:01:50,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:50,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126440913] [2024-06-04 16:01:50,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:50,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:50,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:50,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126440913] [2024-06-04 16:01:50,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126440913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:50,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:50,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:50,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492315891] [2024-06-04 16:01:50,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:50,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:50,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:50,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:50,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:50,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:50,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 453 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:50,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:50,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:50,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:51,119 INFO L124 PetriNetUnfolderBase]: 899/1490 cut-off events. [2024-06-04 16:01:51,119 INFO L125 PetriNetUnfolderBase]: For 4914/4914 co-relation queries the response was YES. [2024-06-04 16:01:51,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5608 conditions, 1490 events. 899/1490 cut-off events. For 4914/4914 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7347 event pairs, 304 based on Foata normal form. 2/1491 useless extension candidates. Maximal degree in co-relation 5576. Up to 1240 conditions per place. [2024-06-04 16:01:51,132 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 69 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-06-04 16:01:51,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 101 transitions, 793 flow [2024-06-04 16:01:51,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:51,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 16:01:51,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:01:51,137 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 453 flow. Second operand 6 states and 144 transitions. [2024-06-04 16:01:51,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 101 transitions, 793 flow [2024-06-04 16:01:51,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 101 transitions, 773 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:51,148 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 577 flow [2024-06-04 16:01:51,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=577, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-04 16:01:51,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-04 16:01:51,149 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 577 flow [2024-06-04 16:01:51,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:51,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:51,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:51,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:01:51,150 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:51,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:51,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1932272944, now seen corresponding path program 3 times [2024-06-04 16:01:51,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:51,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372861517] [2024-06-04 16:01:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:51,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:51,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:51,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372861517] [2024-06-04 16:01:51,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372861517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:51,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:51,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:51,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669638022] [2024-06-04 16:01:51,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:51,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:51,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:51,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:51,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:51,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:51,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 577 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:51,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:51,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:51,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:51,840 INFO L124 PetriNetUnfolderBase]: 894/1483 cut-off events. [2024-06-04 16:01:51,840 INFO L125 PetriNetUnfolderBase]: For 6427/6427 co-relation queries the response was YES. [2024-06-04 16:01:51,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5972 conditions, 1483 events. 894/1483 cut-off events. For 6427/6427 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7262 event pairs, 304 based on Foata normal form. 2/1484 useless extension candidates. Maximal degree in co-relation 5936. Up to 1235 conditions per place. [2024-06-04 16:01:51,856 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 67 selfloop transitions, 25 changer transitions 0/98 dead transitions. [2024-06-04 16:01:51,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 98 transitions, 813 flow [2024-06-04 16:01:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:51,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 16:01:51,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-04 16:01:51,858 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 577 flow. Second operand 6 states and 142 transitions. [2024-06-04 16:01:51,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 98 transitions, 813 flow [2024-06-04 16:01:51,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 98 transitions, 779 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-04 16:01:51,883 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 601 flow [2024-06-04 16:01:51,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=601, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2024-06-04 16:01:51,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-04 16:01:51,885 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 601 flow [2024-06-04 16:01:51,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:51,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:51,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:51,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:01:51,886 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:51,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:51,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1619345834, now seen corresponding path program 1 times [2024-06-04 16:01:51,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:51,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482956116] [2024-06-04 16:01:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:51,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:52,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:52,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482956116] [2024-06-04 16:01:52,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482956116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:52,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:52,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:52,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078561872] [2024-06-04 16:01:52,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:52,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:52,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:52,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:52,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:52,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:52,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 601 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:52,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:52,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:52,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:52,543 INFO L124 PetriNetUnfolderBase]: 845/1417 cut-off events. [2024-06-04 16:01:52,543 INFO L125 PetriNetUnfolderBase]: For 6727/6727 co-relation queries the response was YES. [2024-06-04 16:01:52,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5850 conditions, 1417 events. 845/1417 cut-off events. For 6727/6727 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7063 event pairs, 290 based on Foata normal form. 1/1418 useless extension candidates. Maximal degree in co-relation 5812. Up to 1245 conditions per place. [2024-06-04 16:01:52,561 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 72 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2024-06-04 16:01:52,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 93 transitions, 845 flow [2024-06-04 16:01:52,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-04 16:01:52,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:01:52,563 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 601 flow. Second operand 4 states and 96 transitions. [2024-06-04 16:01:52,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 93 transitions, 845 flow [2024-06-04 16:01:52,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 93 transitions, 766 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:52,580 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 617 flow [2024-06-04 16:01:52,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=617, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-04 16:01:52,581 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-04 16:01:52,581 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 617 flow [2024-06-04 16:01:52,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:52,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:52,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:52,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:01:52,582 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:52,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:52,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1734872291, now seen corresponding path program 1 times [2024-06-04 16:01:52,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:52,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734920941] [2024-06-04 16:01:52,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:52,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:53,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:53,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734920941] [2024-06-04 16:01:53,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734920941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:53,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:53,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:53,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266778206] [2024-06-04 16:01:53,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:53,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:53,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:53,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:53,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:53,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:53,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 617 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:53,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:53,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:53,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:53,378 INFO L124 PetriNetUnfolderBase]: 892/1479 cut-off events. [2024-06-04 16:01:53,378 INFO L125 PetriNetUnfolderBase]: For 9217/9225 co-relation queries the response was YES. [2024-06-04 16:01:53,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6441 conditions, 1479 events. 892/1479 cut-off events. For 9217/9225 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7404 event pairs, 180 based on Foata normal form. 10/1437 useless extension candidates. Maximal degree in co-relation 6402. Up to 1166 conditions per place. [2024-06-04 16:01:53,391 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 67 selfloop transitions, 28 changer transitions 0/112 dead transitions. [2024-06-04 16:01:53,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 112 transitions, 937 flow [2024-06-04 16:01:53,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:53,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:53,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:01:53,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-04 16:01:53,393 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 617 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:01:53,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 112 transitions, 937 flow [2024-06-04 16:01:53,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 933 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:53,408 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 712 flow [2024-06-04 16:01:53,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=712, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2024-06-04 16:01:53,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-04 16:01:53,410 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 712 flow [2024-06-04 16:01:53,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:53,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:53,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:53,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:01:53,411 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:53,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:53,411 INFO L85 PathProgramCache]: Analyzing trace with hash -44827059, now seen corresponding path program 2 times [2024-06-04 16:01:53,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:53,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061887545] [2024-06-04 16:01:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:53,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:53,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:53,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061887545] [2024-06-04 16:01:53,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061887545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:53,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:53,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:53,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391730868] [2024-06-04 16:01:53,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:53,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:53,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:53,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:53,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 712 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:53,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:53,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:53,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:54,158 INFO L124 PetriNetUnfolderBase]: 880/1459 cut-off events. [2024-06-04 16:01:54,158 INFO L125 PetriNetUnfolderBase]: For 10965/10980 co-relation queries the response was YES. [2024-06-04 16:01:54,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6698 conditions, 1459 events. 880/1459 cut-off events. For 10965/10980 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7326 event pairs, 247 based on Foata normal form. 8/1414 useless extension candidates. Maximal degree in co-relation 6656. Up to 1215 conditions per place. [2024-06-04 16:01:54,169 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 64 selfloop transitions, 24 changer transitions 0/105 dead transitions. [2024-06-04 16:01:54,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 105 transitions, 932 flow [2024-06-04 16:01:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:54,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-04 16:01:54,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-04 16:01:54,171 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 712 flow. Second operand 5 states and 124 transitions. [2024-06-04 16:01:54,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 105 transitions, 932 flow [2024-06-04 16:01:54,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 105 transitions, 882 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:54,186 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 718 flow [2024-06-04 16:01:54,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=718, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2024-06-04 16:01:54,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-04 16:01:54,187 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 718 flow [2024-06-04 16:01:54,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:54,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:54,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:54,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:01:54,188 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:54,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:54,189 INFO L85 PathProgramCache]: Analyzing trace with hash 229076675, now seen corresponding path program 3 times [2024-06-04 16:01:54,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:54,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589156516] [2024-06-04 16:01:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:54,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:54,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:54,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589156516] [2024-06-04 16:01:54,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589156516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:54,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:54,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:54,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868172112] [2024-06-04 16:01:54,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:54,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:54,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:54,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:54,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:54,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:54,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 718 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:54,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:54,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:54,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:54,890 INFO L124 PetriNetUnfolderBase]: 868/1441 cut-off events. [2024-06-04 16:01:54,890 INFO L125 PetriNetUnfolderBase]: For 11898/11907 co-relation queries the response was YES. [2024-06-04 16:01:54,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6702 conditions, 1441 events. 868/1441 cut-off events. For 11898/11907 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7226 event pairs, 242 based on Foata normal form. 6/1395 useless extension candidates. Maximal degree in co-relation 6658. Up to 1188 conditions per place. [2024-06-04 16:01:54,903 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 65 selfloop transitions, 29 changer transitions 0/111 dead transitions. [2024-06-04 16:01:54,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 111 transitions, 980 flow [2024-06-04 16:01:54,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:54,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:01:54,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-04 16:01:54,904 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 718 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:01:54,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 111 transitions, 980 flow [2024-06-04 16:01:54,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 111 transitions, 926 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:54,923 INFO L231 Difference]: Finished difference. Result has 90 places, 90 transitions, 754 flow [2024-06-04 16:01:54,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=754, PETRI_PLACES=90, PETRI_TRANSITIONS=90} [2024-06-04 16:01:54,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-04 16:01:54,930 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 90 transitions, 754 flow [2024-06-04 16:01:54,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:54,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:54,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:54,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:01:54,931 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:54,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:54,932 INFO L85 PathProgramCache]: Analyzing trace with hash -559864735, now seen corresponding path program 1 times [2024-06-04 16:01:54,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:54,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895929422] [2024-06-04 16:01:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:54,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:55,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:55,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895929422] [2024-06-04 16:01:55,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895929422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:55,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:55,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:55,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103007973] [2024-06-04 16:01:55,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:55,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:55,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:55,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:55,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:55,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 90 transitions, 754 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:55,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:55,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:55,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:55,782 INFO L124 PetriNetUnfolderBase]: 1055/1744 cut-off events. [2024-06-04 16:01:55,782 INFO L125 PetriNetUnfolderBase]: For 13796/13796 co-relation queries the response was YES. [2024-06-04 16:01:55,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7958 conditions, 1744 events. 1055/1744 cut-off events. For 13796/13796 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9016 event pairs, 156 based on Foata normal form. 12/1755 useless extension candidates. Maximal degree in co-relation 7913. Up to 1206 conditions per place. [2024-06-04 16:01:55,795 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 102 selfloop transitions, 24 changer transitions 0/132 dead transitions. [2024-06-04 16:01:55,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 132 transitions, 1203 flow [2024-06-04 16:01:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:55,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:01:55,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-04 16:01:55,797 INFO L175 Difference]: Start difference. First operand has 90 places, 90 transitions, 754 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:01:55,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 132 transitions, 1203 flow [2024-06-04 16:01:55,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 132 transitions, 1133 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:55,818 INFO L231 Difference]: Finished difference. Result has 95 places, 95 transitions, 785 flow [2024-06-04 16:01:55,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=785, PETRI_PLACES=95, PETRI_TRANSITIONS=95} [2024-06-04 16:01:55,819 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-04 16:01:55,819 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 95 transitions, 785 flow [2024-06-04 16:01:55,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:55,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:55,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:55,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:01:55,820 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:55,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:55,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1389634385, now seen corresponding path program 2 times [2024-06-04 16:01:55,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:55,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72035085] [2024-06-04 16:01:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:55,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:56,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:56,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72035085] [2024-06-04 16:01:56,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72035085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:56,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:56,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:56,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481582931] [2024-06-04 16:01:56,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:56,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:56,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:56,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:56,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:56,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:56,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 95 transitions, 785 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:56,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:56,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:56,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:56,666 INFO L124 PetriNetUnfolderBase]: 1088/1813 cut-off events. [2024-06-04 16:01:56,666 INFO L125 PetriNetUnfolderBase]: For 15576/15576 co-relation queries the response was YES. [2024-06-04 16:01:56,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8335 conditions, 1813 events. 1088/1813 cut-off events. For 15576/15576 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9554 event pairs, 257 based on Foata normal form. 16/1828 useless extension candidates. Maximal degree in co-relation 8287. Up to 1451 conditions per place. [2024-06-04 16:01:56,684 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 95 selfloop transitions, 22 changer transitions 0/123 dead transitions. [2024-06-04 16:01:56,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 123 transitions, 1117 flow [2024-06-04 16:01:56,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:56,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:01:56,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-04 16:01:56,686 INFO L175 Difference]: Start difference. First operand has 95 places, 95 transitions, 785 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:01:56,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 123 transitions, 1117 flow [2024-06-04 16:01:56,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 123 transitions, 1091 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:56,722 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 824 flow [2024-06-04 16:01:56,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=824, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2024-06-04 16:01:56,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-04 16:01:56,723 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 824 flow [2024-06-04 16:01:56,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:56,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:56,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:56,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:01:56,724 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:56,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1389638105, now seen corresponding path program 3 times [2024-06-04 16:01:56,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:56,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360896307] [2024-06-04 16:01:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:56,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:57,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:57,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360896307] [2024-06-04 16:01:57,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360896307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:57,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:57,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:57,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430587650] [2024-06-04 16:01:57,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:57,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:57,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:57,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:57,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:57,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:57,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 824 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:57,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:57,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:57,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:57,517 INFO L124 PetriNetUnfolderBase]: 1068/1781 cut-off events. [2024-06-04 16:01:57,517 INFO L125 PetriNetUnfolderBase]: For 15858/15858 co-relation queries the response was YES. [2024-06-04 16:01:57,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8324 conditions, 1781 events. 1068/1781 cut-off events. For 15858/15858 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9329 event pairs, 226 based on Foata normal form. 12/1792 useless extension candidates. Maximal degree in co-relation 8274. Up to 1332 conditions per place. [2024-06-04 16:01:57,533 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 99 selfloop transitions, 23 changer transitions 0/128 dead transitions. [2024-06-04 16:01:57,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 128 transitions, 1192 flow [2024-06-04 16:01:57,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:57,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:01:57,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 16:01:57,535 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 824 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:01:57,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 128 transitions, 1192 flow [2024-06-04 16:01:57,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 128 transitions, 1154 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:57,563 INFO L231 Difference]: Finished difference. Result has 102 places, 99 transitions, 878 flow [2024-06-04 16:01:57,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=878, PETRI_PLACES=102, PETRI_TRANSITIONS=99} [2024-06-04 16:01:57,564 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-04 16:01:57,564 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 99 transitions, 878 flow [2024-06-04 16:01:57,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:57,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:57,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:57,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:01:57,565 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:57,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:57,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1483046693, now seen corresponding path program 4 times [2024-06-04 16:01:57,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:57,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433831997] [2024-06-04 16:01:57,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:57,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:57,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:57,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433831997] [2024-06-04 16:01:57,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433831997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:57,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:57,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:57,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643544324] [2024-06-04 16:01:57,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:57,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:57,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:57,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:57,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:57,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:57,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 99 transitions, 878 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:57,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:57,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:57,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:58,326 INFO L124 PetriNetUnfolderBase]: 1126/1879 cut-off events. [2024-06-04 16:01:58,330 INFO L125 PetriNetUnfolderBase]: For 18658/18658 co-relation queries the response was YES. [2024-06-04 16:01:58,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8870 conditions, 1879 events. 1126/1879 cut-off events. For 18658/18658 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9978 event pairs, 310 based on Foata normal form. 16/1894 useless extension candidates. Maximal degree in co-relation 8818. Up to 1536 conditions per place. [2024-06-04 16:01:58,348 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 96 selfloop transitions, 28 changer transitions 0/130 dead transitions. [2024-06-04 16:01:58,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 130 transitions, 1229 flow [2024-06-04 16:01:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:01:58,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:01:58,351 INFO L175 Difference]: Start difference. First operand has 102 places, 99 transitions, 878 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:01:58,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 130 transitions, 1229 flow [2024-06-04 16:01:58,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 130 transitions, 1205 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:58,386 INFO L231 Difference]: Finished difference. Result has 107 places, 100 transitions, 927 flow [2024-06-04 16:01:58,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=927, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2024-06-04 16:01:58,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-04 16:01:58,387 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 927 flow [2024-06-04 16:01:58,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:58,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:58,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:58,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:01:58,389 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:58,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:58,389 INFO L85 PathProgramCache]: Analyzing trace with hash 314374365, now seen corresponding path program 5 times [2024-06-04 16:01:58,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:58,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462756369] [2024-06-04 16:01:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:58,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:58,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:58,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462756369] [2024-06-04 16:01:58,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462756369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:58,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:58,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:58,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267069702] [2024-06-04 16:01:58,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:58,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:58,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:58,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:58,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:58,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:58,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 927 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:58,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:58,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:58,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:59,172 INFO L124 PetriNetUnfolderBase]: 1184/1987 cut-off events. [2024-06-04 16:01:59,172 INFO L125 PetriNetUnfolderBase]: For 20875/20875 co-relation queries the response was YES. [2024-06-04 16:01:59,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9486 conditions, 1987 events. 1184/1987 cut-off events. For 20875/20875 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10741 event pairs, 325 based on Foata normal form. 16/2002 useless extension candidates. Maximal degree in co-relation 9432. Up to 1634 conditions per place. [2024-06-04 16:01:59,191 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 97 selfloop transitions, 27 changer transitions 0/130 dead transitions. [2024-06-04 16:01:59,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 130 transitions, 1276 flow [2024-06-04 16:01:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:59,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:59,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:01:59,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:01:59,194 INFO L175 Difference]: Start difference. First operand has 107 places, 100 transitions, 927 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:01:59,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 130 transitions, 1276 flow [2024-06-04 16:01:59,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 130 transitions, 1219 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:59,231 INFO L231 Difference]: Finished difference. Result has 109 places, 101 transitions, 943 flow [2024-06-04 16:01:59,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=943, PETRI_PLACES=109, PETRI_TRANSITIONS=101} [2024-06-04 16:01:59,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-04 16:01:59,233 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 101 transitions, 943 flow [2024-06-04 16:01:59,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:59,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:59,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:59,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:01:59,234 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:59,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:59,234 INFO L85 PathProgramCache]: Analyzing trace with hash 314226495, now seen corresponding path program 6 times [2024-06-04 16:01:59,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:59,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732081856] [2024-06-04 16:01:59,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:59,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:59,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:59,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732081856] [2024-06-04 16:01:59,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732081856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:59,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:59,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:59,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136083790] [2024-06-04 16:01:59,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:59,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:59,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:59,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:59,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:59,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:59,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 101 transitions, 943 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:59,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:59,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:59,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:00,029 INFO L124 PetriNetUnfolderBase]: 1200/2019 cut-off events. [2024-06-04 16:02:00,029 INFO L125 PetriNetUnfolderBase]: For 21828/21828 co-relation queries the response was YES. [2024-06-04 16:02:00,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9624 conditions, 2019 events. 1200/2019 cut-off events. For 21828/21828 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11007 event pairs, 316 based on Foata normal form. 12/2030 useless extension candidates. Maximal degree in co-relation 9569. Up to 1487 conditions per place. [2024-06-04 16:02:00,049 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 100 selfloop transitions, 30 changer transitions 0/136 dead transitions. [2024-06-04 16:02:00,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 136 transitions, 1334 flow [2024-06-04 16:02:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:02:00,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-04 16:02:00,051 INFO L175 Difference]: Start difference. First operand has 109 places, 101 transitions, 943 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:02:00,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 136 transitions, 1334 flow [2024-06-04 16:02:00,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 136 transitions, 1277 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:00,088 INFO L231 Difference]: Finished difference. Result has 112 places, 104 transitions, 993 flow [2024-06-04 16:02:00,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=993, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2024-06-04 16:02:00,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-04 16:02:00,089 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 993 flow [2024-06-04 16:02:00,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:00,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:00,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:00,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:02:00,091 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:00,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:00,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1482831491, now seen corresponding path program 1 times [2024-06-04 16:02:00,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:00,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95230304] [2024-06-04 16:02:00,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:00,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:00,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:00,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95230304] [2024-06-04 16:02:00,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95230304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:00,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:00,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:00,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367146848] [2024-06-04 16:02:00,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:00,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:00,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:00,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:00,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:00,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:00,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 993 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:00,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:00,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:00,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:00,869 INFO L124 PetriNetUnfolderBase]: 1180/1987 cut-off events. [2024-06-04 16:02:00,869 INFO L125 PetriNetUnfolderBase]: For 21985/21985 co-relation queries the response was YES. [2024-06-04 16:02:00,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9464 conditions, 1987 events. 1180/1987 cut-off events. For 21985/21985 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10789 event pairs, 268 based on Foata normal form. 12/1998 useless extension candidates. Maximal degree in co-relation 9407. Up to 1335 conditions per place. [2024-06-04 16:02:00,889 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 99 selfloop transitions, 32 changer transitions 0/137 dead transitions. [2024-06-04 16:02:00,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 137 transitions, 1332 flow [2024-06-04 16:02:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:00,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:00,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:02:00,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-04 16:02:00,892 INFO L175 Difference]: Start difference. First operand has 112 places, 104 transitions, 993 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:02:00,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 137 transitions, 1332 flow [2024-06-04 16:02:00,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 137 transitions, 1290 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:00,936 INFO L231 Difference]: Finished difference. Result has 115 places, 103 transitions, 981 flow [2024-06-04 16:02:00,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=981, PETRI_PLACES=115, PETRI_TRANSITIONS=103} [2024-06-04 16:02:00,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-04 16:02:00,937 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 103 transitions, 981 flow [2024-06-04 16:02:00,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:00,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:00,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:00,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:02:00,937 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:00,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:00,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1198249931, now seen corresponding path program 1 times [2024-06-04 16:02:00,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:00,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473319657] [2024-06-04 16:02:00,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:00,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:01,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:01,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473319657] [2024-06-04 16:02:01,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473319657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:01,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:01,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:02:01,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288026274] [2024-06-04 16:02:01,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:01,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:02:01,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:01,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:02:01,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:02:01,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:02:01,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 103 transitions, 981 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:01,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:01,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:02:01,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:01,667 INFO L124 PetriNetUnfolderBase]: 1130/1922 cut-off events. [2024-06-04 16:02:01,667 INFO L125 PetriNetUnfolderBase]: For 22202/22207 co-relation queries the response was YES. [2024-06-04 16:02:01,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9377 conditions, 1922 events. 1130/1922 cut-off events. For 22202/22207 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10656 event pairs, 311 based on Foata normal form. 7/1920 useless extension candidates. Maximal degree in co-relation 9318. Up to 1705 conditions per place. [2024-06-04 16:02:01,685 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 83 selfloop transitions, 18 changer transitions 0/114 dead transitions. [2024-06-04 16:02:01,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 114 transitions, 1227 flow [2024-06-04 16:02:01,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:02:01,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:02:01,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-04 16:02:01,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-04 16:02:01,687 INFO L175 Difference]: Start difference. First operand has 115 places, 103 transitions, 981 flow. Second operand 4 states and 97 transitions. [2024-06-04 16:02:01,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 114 transitions, 1227 flow [2024-06-04 16:02:01,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 114 transitions, 1119 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:01,729 INFO L231 Difference]: Finished difference. Result has 112 places, 106 transitions, 950 flow [2024-06-04 16:02:01,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=950, PETRI_PLACES=112, PETRI_TRANSITIONS=106} [2024-06-04 16:02:01,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-04 16:02:01,729 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 106 transitions, 950 flow [2024-06-04 16:02:01,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:01,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:01,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:01,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:02:01,730 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:01,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:01,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1551885911, now seen corresponding path program 2 times [2024-06-04 16:02:01,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:01,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369835165] [2024-06-04 16:02:01,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:01,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:02,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:02,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369835165] [2024-06-04 16:02:02,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369835165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:02,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:02,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:02,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211333312] [2024-06-04 16:02:02,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:02,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:02,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:02,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:02,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:02,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:02:02,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 106 transitions, 950 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:02,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:02,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:02:02,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:02,542 INFO L124 PetriNetUnfolderBase]: 1125/1927 cut-off events. [2024-06-04 16:02:02,542 INFO L125 PetriNetUnfolderBase]: For 22879/22879 co-relation queries the response was YES. [2024-06-04 16:02:02,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9261 conditions, 1927 events. 1125/1927 cut-off events. For 22879/22879 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10665 event pairs, 299 based on Foata normal form. 2/1922 useless extension candidates. Maximal degree in co-relation 9203. Up to 1695 conditions per place. [2024-06-04 16:02:02,553 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 92 selfloop transitions, 22 changer transitions 0/127 dead transitions. [2024-06-04 16:02:02,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 127 transitions, 1259 flow [2024-06-04 16:02:02,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-04 16:02:02,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-04 16:02:02,556 INFO L175 Difference]: Start difference. First operand has 112 places, 106 transitions, 950 flow. Second operand 7 states and 156 transitions. [2024-06-04 16:02:02,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 127 transitions, 1259 flow [2024-06-04 16:02:02,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 127 transitions, 1208 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:02,599 INFO L231 Difference]: Finished difference. Result has 117 places, 109 transitions, 985 flow [2024-06-04 16:02:02,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=985, PETRI_PLACES=117, PETRI_TRANSITIONS=109} [2024-06-04 16:02:02,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-04 16:02:02,599 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 109 transitions, 985 flow [2024-06-04 16:02:02,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:02,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:02,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:02,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:02:02,600 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:02,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:02,601 INFO L85 PathProgramCache]: Analyzing trace with hash -305851225, now seen corresponding path program 1 times [2024-06-04 16:02:02,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:02,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331272924] [2024-06-04 16:02:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:02,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:02,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:02,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331272924] [2024-06-04 16:02:02,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331272924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:02,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:02,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:02:02,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154278965] [2024-06-04 16:02:02,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:02,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:02:02,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:02,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:02:02,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:02:03,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:02:03,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 109 transitions, 985 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:03,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:03,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:02:03,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:03,268 INFO L124 PetriNetUnfolderBase]: 1115/1939 cut-off events. [2024-06-04 16:02:03,268 INFO L125 PetriNetUnfolderBase]: For 23917/23917 co-relation queries the response was YES. [2024-06-04 16:02:03,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9478 conditions, 1939 events. 1115/1939 cut-off events. For 23917/23917 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10825 event pairs, 302 based on Foata normal form. 2/1940 useless extension candidates. Maximal degree in co-relation 9419. Up to 1706 conditions per place. [2024-06-04 16:02:03,281 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 100 selfloop transitions, 23 changer transitions 0/132 dead transitions. [2024-06-04 16:02:03,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 132 transitions, 1375 flow [2024-06-04 16:02:03,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:03,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-04 16:02:03,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-04 16:02:03,283 INFO L175 Difference]: Start difference. First operand has 117 places, 109 transitions, 985 flow. Second operand 6 states and 140 transitions. [2024-06-04 16:02:03,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 132 transitions, 1375 flow [2024-06-04 16:02:03,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 132 transitions, 1289 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:03,330 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 1017 flow [2024-06-04 16:02:03,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1017, PETRI_PLACES=116, PETRI_TRANSITIONS=115} [2024-06-04 16:02:03,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-04 16:02:03,330 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 1017 flow [2024-06-04 16:02:03,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:03,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:03,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:03,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:02:03,331 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:03,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:03,332 INFO L85 PathProgramCache]: Analyzing trace with hash -476549005, now seen corresponding path program 2 times [2024-06-04 16:02:03,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:03,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854995742] [2024-06-04 16:02:03,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:03,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:03,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:03,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854995742] [2024-06-04 16:02:03,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854995742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:03,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:03,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:02:03,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481064973] [2024-06-04 16:02:03,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:03,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:02:03,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:03,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:02:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:02:03,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:02:03,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 115 transitions, 1017 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:03,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:03,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:02:03,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:04,054 INFO L124 PetriNetUnfolderBase]: 1133/1969 cut-off events. [2024-06-04 16:02:04,055 INFO L125 PetriNetUnfolderBase]: For 26278/26278 co-relation queries the response was YES. [2024-06-04 16:02:04,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9917 conditions, 1969 events. 1133/1969 cut-off events. For 26278/26278 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11022 event pairs, 302 based on Foata normal form. 2/1970 useless extension candidates. Maximal degree in co-relation 9860. Up to 1754 conditions per place. [2024-06-04 16:02:04,071 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 104 selfloop transitions, 21 changer transitions 0/134 dead transitions. [2024-06-04 16:02:04,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 134 transitions, 1371 flow [2024-06-04 16:02:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:04,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-04 16:02:04,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:02:04,072 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 1017 flow. Second operand 6 states and 135 transitions. [2024-06-04 16:02:04,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 134 transitions, 1371 flow [2024-06-04 16:02:04,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 134 transitions, 1303 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:04,111 INFO L231 Difference]: Finished difference. Result has 119 places, 121 transitions, 1075 flow [2024-06-04 16:02:04,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1075, PETRI_PLACES=119, PETRI_TRANSITIONS=121} [2024-06-04 16:02:04,111 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-04 16:02:04,111 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 121 transitions, 1075 flow [2024-06-04 16:02:04,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:04,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:04,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:04,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:02:04,112 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:04,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:04,112 INFO L85 PathProgramCache]: Analyzing trace with hash -476548819, now seen corresponding path program 1 times [2024-06-04 16:02:04,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:04,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159583364] [2024-06-04 16:02:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:04,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:04,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:04,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159583364] [2024-06-04 16:02:04,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159583364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:04,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:04,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:02:04,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887702192] [2024-06-04 16:02:04,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:04,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:02:04,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:04,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:02:04,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:02:04,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:04,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 121 transitions, 1075 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:04,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:04,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:04,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:04,765 INFO L124 PetriNetUnfolderBase]: 1219/2068 cut-off events. [2024-06-04 16:02:04,765 INFO L125 PetriNetUnfolderBase]: For 27939/27939 co-relation queries the response was YES. [2024-06-04 16:02:04,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10259 conditions, 2068 events. 1219/2068 cut-off events. For 27939/27939 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11371 event pairs, 302 based on Foata normal form. 1/2069 useless extension candidates. Maximal degree in co-relation 10201. Up to 1872 conditions per place. [2024-06-04 16:02:04,780 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 124 selfloop transitions, 19 changer transitions 0/149 dead transitions. [2024-06-04 16:02:04,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 149 transitions, 1572 flow [2024-06-04 16:02:04,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-04 16:02:04,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-04 16:02:04,783 INFO L175 Difference]: Start difference. First operand has 119 places, 121 transitions, 1075 flow. Second operand 6 states and 133 transitions. [2024-06-04 16:02:04,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 149 transitions, 1572 flow [2024-06-04 16:02:04,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 149 transitions, 1501 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:04,813 INFO L231 Difference]: Finished difference. Result has 124 places, 133 transitions, 1191 flow [2024-06-04 16:02:04,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1191, PETRI_PLACES=124, PETRI_TRANSITIONS=133} [2024-06-04 16:02:04,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-04 16:02:04,814 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 133 transitions, 1191 flow [2024-06-04 16:02:04,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:04,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:04,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:04,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:02:04,814 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:04,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:04,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1552117109, now seen corresponding path program 2 times [2024-06-04 16:02:04,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:04,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484124486] [2024-06-04 16:02:04,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:04,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:05,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:05,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484124486] [2024-06-04 16:02:05,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484124486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:05,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:05,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:02:05,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721434148] [2024-06-04 16:02:05,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:05,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:02:05,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:05,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:02:05,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:02:05,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:05,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 133 transitions, 1191 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:05,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:05,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:05,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:05,456 INFO L124 PetriNetUnfolderBase]: 1224/2075 cut-off events. [2024-06-04 16:02:05,456 INFO L125 PetriNetUnfolderBase]: For 30222/30222 co-relation queries the response was YES. [2024-06-04 16:02:05,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10560 conditions, 2075 events. 1224/2075 cut-off events. For 30222/30222 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11432 event pairs, 302 based on Foata normal form. 1/2076 useless extension candidates. Maximal degree in co-relation 10499. Up to 1878 conditions per place. [2024-06-04 16:02:05,469 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 123 selfloop transitions, 22 changer transitions 0/151 dead transitions. [2024-06-04 16:02:05,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 151 transitions, 1607 flow [2024-06-04 16:02:05,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:05,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-04 16:02:05,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-04 16:02:05,471 INFO L175 Difference]: Start difference. First operand has 124 places, 133 transitions, 1191 flow. Second operand 5 states and 116 transitions. [2024-06-04 16:02:05,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 151 transitions, 1607 flow [2024-06-04 16:02:05,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 151 transitions, 1571 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:05,513 INFO L231 Difference]: Finished difference. Result has 128 places, 137 transitions, 1260 flow [2024-06-04 16:02:05,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1260, PETRI_PLACES=128, PETRI_TRANSITIONS=137} [2024-06-04 16:02:05,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-04 16:02:05,514 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 137 transitions, 1260 flow [2024-06-04 16:02:05,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:05,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:05,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:05,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:02:05,514 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:05,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:05,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1551879959, now seen corresponding path program 3 times [2024-06-04 16:02:05,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:05,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617402439] [2024-06-04 16:02:05,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:05,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:05,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:05,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:05,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617402439] [2024-06-04 16:02:05,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617402439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:05,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:05,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:02:05,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107972134] [2024-06-04 16:02:05,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:05,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:02:05,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:05,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:02:05,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:02:05,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:05,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 137 transitions, 1260 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:05,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:05,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:05,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:06,142 INFO L124 PetriNetUnfolderBase]: 1221/2072 cut-off events. [2024-06-04 16:02:06,142 INFO L125 PetriNetUnfolderBase]: For 32238/32242 co-relation queries the response was YES. [2024-06-04 16:02:06,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10592 conditions, 2072 events. 1221/2072 cut-off events. For 32238/32242 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11418 event pairs, 307 based on Foata normal form. 5/2077 useless extension candidates. Maximal degree in co-relation 10529. Up to 1875 conditions per place. [2024-06-04 16:02:06,158 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 120 selfloop transitions, 22 changer transitions 0/148 dead transitions. [2024-06-04 16:02:06,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 148 transitions, 1583 flow [2024-06-04 16:02:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:06,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:06,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-04 16:02:06,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414634146341464 [2024-06-04 16:02:06,159 INFO L175 Difference]: Start difference. First operand has 128 places, 137 transitions, 1260 flow. Second operand 5 states and 111 transitions. [2024-06-04 16:02:06,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 148 transitions, 1583 flow [2024-06-04 16:02:06,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 148 transitions, 1532 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:06,212 INFO L231 Difference]: Finished difference. Result has 130 places, 138 transitions, 1267 flow [2024-06-04 16:02:06,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1267, PETRI_PLACES=130, PETRI_TRANSITIONS=138} [2024-06-04 16:02:06,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-04 16:02:06,215 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 138 transitions, 1267 flow [2024-06-04 16:02:06,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:06,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:06,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:06,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:02:06,216 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:06,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:06,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1552117295, now seen corresponding path program 3 times [2024-06-04 16:02:06,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:06,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688083544] [2024-06-04 16:02:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:06,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:06,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:06,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688083544] [2024-06-04 16:02:06,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688083544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:06,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:06,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:02:06,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885383905] [2024-06-04 16:02:06,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:06,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:02:06,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:06,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:02:06,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:02:06,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:02:06,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 138 transitions, 1267 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:06,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:06,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:02:06,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:06,824 INFO L124 PetriNetUnfolderBase]: 1159/1998 cut-off events. [2024-06-04 16:02:06,824 INFO L125 PetriNetUnfolderBase]: For 31628/31628 co-relation queries the response was YES. [2024-06-04 16:02:06,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10229 conditions, 1998 events. 1159/1998 cut-off events. For 31628/31628 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11145 event pairs, 301 based on Foata normal form. 2/1999 useless extension candidates. Maximal degree in co-relation 10166. Up to 1730 conditions per place. [2024-06-04 16:02:06,869 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 108 selfloop transitions, 31 changer transitions 0/153 dead transitions. [2024-06-04 16:02:06,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 153 transitions, 1583 flow [2024-06-04 16:02:06,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:06,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-04 16:02:06,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-04 16:02:06,870 INFO L175 Difference]: Start difference. First operand has 130 places, 138 transitions, 1267 flow. Second operand 5 states and 121 transitions. [2024-06-04 16:02:06,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 153 transitions, 1583 flow [2024-06-04 16:02:06,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 153 transitions, 1537 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:06,917 INFO L231 Difference]: Finished difference. Result has 133 places, 138 transitions, 1300 flow [2024-06-04 16:02:06,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1300, PETRI_PLACES=133, PETRI_TRANSITIONS=138} [2024-06-04 16:02:06,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-04 16:02:06,918 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 138 transitions, 1300 flow [2024-06-04 16:02:06,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:06,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:06,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:06,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:02:06,919 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:06,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:06,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1551871031, now seen corresponding path program 1 times [2024-06-04 16:02:06,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:06,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352554663] [2024-06-04 16:02:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:06,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:07,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:07,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352554663] [2024-06-04 16:02:07,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352554663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:07,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:07,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:02:07,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333861480] [2024-06-04 16:02:07,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:07,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:02:07,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:07,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:02:07,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:02:07,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:02:07,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 138 transitions, 1300 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:07,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:07,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:02:07,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:07,490 INFO L124 PetriNetUnfolderBase]: 1157/1980 cut-off events. [2024-06-04 16:02:07,490 INFO L125 PetriNetUnfolderBase]: For 32963/32963 co-relation queries the response was YES. [2024-06-04 16:02:07,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10246 conditions, 1980 events. 1157/1980 cut-off events. For 32963/32963 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10945 event pairs, 295 based on Foata normal form. 2/1975 useless extension candidates. Maximal degree in co-relation 10181. Up to 1753 conditions per place. [2024-06-04 16:02:07,504 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 124 selfloop transitions, 10 changer transitions 0/151 dead transitions. [2024-06-04 16:02:07,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 151 transitions, 1615 flow [2024-06-04 16:02:07,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:07,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-04 16:02:07,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-04 16:02:07,505 INFO L175 Difference]: Start difference. First operand has 133 places, 138 transitions, 1300 flow. Second operand 5 states and 113 transitions. [2024-06-04 16:02:07,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 151 transitions, 1615 flow [2024-06-04 16:02:07,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 151 transitions, 1551 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:07,555 INFO L231 Difference]: Finished difference. Result has 134 places, 140 transitions, 1279 flow [2024-06-04 16:02:07,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1279, PETRI_PLACES=134, PETRI_TRANSITIONS=140} [2024-06-04 16:02:07,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-04 16:02:07,555 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 140 transitions, 1279 flow [2024-06-04 16:02:07,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:07,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:07,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:07,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 16:02:07,556 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:07,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:07,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1891835097, now seen corresponding path program 1 times [2024-06-04 16:02:07,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:07,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049155084] [2024-06-04 16:02:07,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:07,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:07,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:07,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049155084] [2024-06-04 16:02:07,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049155084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:07,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:07,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:07,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495613006] [2024-06-04 16:02:07,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:07,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:07,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:07,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:07,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:07,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:07,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 140 transitions, 1279 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:07,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:07,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:07,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:08,228 INFO L124 PetriNetUnfolderBase]: 1215/2052 cut-off events. [2024-06-04 16:02:08,229 INFO L125 PetriNetUnfolderBase]: For 32735/32735 co-relation queries the response was YES. [2024-06-04 16:02:08,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10604 conditions, 2052 events. 1215/2052 cut-off events. For 32735/32735 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11224 event pairs, 300 based on Foata normal form. 1/2053 useless extension candidates. Maximal degree in co-relation 10538. Up to 1834 conditions per place. [2024-06-04 16:02:08,242 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 134 selfloop transitions, 34 changer transitions 0/174 dead transitions. [2024-06-04 16:02:08,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 174 transitions, 1850 flow [2024-06-04 16:02:08,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-04 16:02:08,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-04 16:02:08,244 INFO L175 Difference]: Start difference. First operand has 134 places, 140 transitions, 1279 flow. Second operand 7 states and 155 transitions. [2024-06-04 16:02:08,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 174 transitions, 1850 flow [2024-06-04 16:02:08,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 174 transitions, 1828 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:08,313 INFO L231 Difference]: Finished difference. Result has 141 places, 153 transitions, 1482 flow [2024-06-04 16:02:08,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1482, PETRI_PLACES=141, PETRI_TRANSITIONS=153} [2024-06-04 16:02:08,314 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-04 16:02:08,314 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 153 transitions, 1482 flow [2024-06-04 16:02:08,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:08,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:08,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:08,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 16:02:08,315 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:08,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:08,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1888110447, now seen corresponding path program 2 times [2024-06-04 16:02:08,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:08,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343797713] [2024-06-04 16:02:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:08,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:08,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:08,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343797713] [2024-06-04 16:02:08,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343797713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:08,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:08,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:08,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435489794] [2024-06-04 16:02:08,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:08,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:08,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:08,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:08,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:08,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:08,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 153 transitions, 1482 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:08,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:08,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:08,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:09,111 INFO L124 PetriNetUnfolderBase]: 1228/2074 cut-off events. [2024-06-04 16:02:09,111 INFO L125 PetriNetUnfolderBase]: For 36321/36321 co-relation queries the response was YES. [2024-06-04 16:02:09,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11154 conditions, 2074 events. 1228/2074 cut-off events. For 36321/36321 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11347 event pairs, 300 based on Foata normal form. 1/2075 useless extension candidates. Maximal degree in co-relation 11084. Up to 1875 conditions per place. [2024-06-04 16:02:09,125 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 141 selfloop transitions, 32 changer transitions 0/179 dead transitions. [2024-06-04 16:02:09,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 179 transitions, 2013 flow [2024-06-04 16:02:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-04 16:02:09,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986449864498645 [2024-06-04 16:02:09,126 INFO L175 Difference]: Start difference. First operand has 141 places, 153 transitions, 1482 flow. Second operand 9 states and 184 transitions. [2024-06-04 16:02:09,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 179 transitions, 2013 flow [2024-06-04 16:02:09,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 179 transitions, 1953 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:09,193 INFO L231 Difference]: Finished difference. Result has 149 places, 161 transitions, 1586 flow [2024-06-04 16:02:09,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1586, PETRI_PLACES=149, PETRI_TRANSITIONS=161} [2024-06-04 16:02:09,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-04 16:02:09,194 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 161 transitions, 1586 flow [2024-06-04 16:02:09,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:09,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:09,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:09,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 16:02:09,195 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:09,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:09,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1888116027, now seen corresponding path program 3 times [2024-06-04 16:02:09,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:09,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116794147] [2024-06-04 16:02:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:09,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:09,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:09,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116794147] [2024-06-04 16:02:09,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116794147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:09,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:09,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:09,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130945880] [2024-06-04 16:02:09,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:09,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:09,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:09,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:09,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:09,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:09,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 161 transitions, 1586 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:09,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:09,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:09,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:09,797 INFO L124 PetriNetUnfolderBase]: 1225/2070 cut-off events. [2024-06-04 16:02:09,797 INFO L125 PetriNetUnfolderBase]: For 38182/38182 co-relation queries the response was YES. [2024-06-04 16:02:09,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11246 conditions, 2070 events. 1225/2070 cut-off events. For 38182/38182 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11343 event pairs, 300 based on Foata normal form. 1/2071 useless extension candidates. Maximal degree in co-relation 11173. Up to 1872 conditions per place. [2024-06-04 16:02:09,812 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 139 selfloop transitions, 31 changer transitions 0/176 dead transitions. [2024-06-04 16:02:09,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 176 transitions, 1969 flow [2024-06-04 16:02:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:09,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:09,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-04 16:02:09,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-04 16:02:09,813 INFO L175 Difference]: Start difference. First operand has 149 places, 161 transitions, 1586 flow. Second operand 7 states and 151 transitions. [2024-06-04 16:02:09,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 176 transitions, 1969 flow [2024-06-04 16:02:09,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 176 transitions, 1911 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:09,889 INFO L231 Difference]: Finished difference. Result has 152 places, 161 transitions, 1596 flow [2024-06-04 16:02:09,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1596, PETRI_PLACES=152, PETRI_TRANSITIONS=161} [2024-06-04 16:02:09,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-04 16:02:09,889 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 161 transitions, 1596 flow [2024-06-04 16:02:09,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:09,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:09,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:09,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 16:02:09,890 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:09,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:09,890 INFO L85 PathProgramCache]: Analyzing trace with hash -863637419, now seen corresponding path program 4 times [2024-06-04 16:02:09,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:09,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872402851] [2024-06-04 16:02:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:09,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:10,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:10,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872402851] [2024-06-04 16:02:10,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872402851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:10,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:10,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:10,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927260503] [2024-06-04 16:02:10,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:10,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:10,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:10,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:10,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:10,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:10,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 161 transitions, 1596 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:10,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:10,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:10,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:10,626 INFO L124 PetriNetUnfolderBase]: 1230/2080 cut-off events. [2024-06-04 16:02:10,626 INFO L125 PetriNetUnfolderBase]: For 40940/40946 co-relation queries the response was YES. [2024-06-04 16:02:10,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11421 conditions, 2080 events. 1230/2080 cut-off events. For 40940/40946 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11430 event pairs, 305 based on Foata normal form. 7/2087 useless extension candidates. Maximal degree in co-relation 11346. Up to 1858 conditions per place. [2024-06-04 16:02:10,640 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 135 selfloop transitions, 42 changer transitions 0/183 dead transitions. [2024-06-04 16:02:10,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 183 transitions, 2106 flow [2024-06-04 16:02:10,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:10,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:10,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-04 16:02:10,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2024-06-04 16:02:10,641 INFO L175 Difference]: Start difference. First operand has 152 places, 161 transitions, 1596 flow. Second operand 8 states and 167 transitions. [2024-06-04 16:02:10,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 183 transitions, 2106 flow [2024-06-04 16:02:10,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 183 transitions, 2044 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:10,735 INFO L231 Difference]: Finished difference. Result has 155 places, 166 transitions, 1688 flow [2024-06-04 16:02:10,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1688, PETRI_PLACES=155, PETRI_TRANSITIONS=166} [2024-06-04 16:02:10,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-04 16:02:10,736 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 166 transitions, 1688 flow [2024-06-04 16:02:10,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:10,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:10,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:10,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 16:02:10,736 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:10,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash -870989069, now seen corresponding path program 5 times [2024-06-04 16:02:10,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:10,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701848965] [2024-06-04 16:02:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:10,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:11,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:11,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701848965] [2024-06-04 16:02:11,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701848965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:11,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:11,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:11,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576541331] [2024-06-04 16:02:11,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:11,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:11,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:11,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:11,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:11,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 166 transitions, 1688 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:11,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:11,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:11,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:11,434 INFO L124 PetriNetUnfolderBase]: 1235/2088 cut-off events. [2024-06-04 16:02:11,435 INFO L125 PetriNetUnfolderBase]: For 43021/43021 co-relation queries the response was YES. [2024-06-04 16:02:11,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11620 conditions, 2088 events. 1235/2088 cut-off events. For 43021/43021 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11465 event pairs, 300 based on Foata normal form. 1/2089 useless extension candidates. Maximal degree in co-relation 11543. Up to 1864 conditions per place. [2024-06-04 16:02:11,451 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 137 selfloop transitions, 46 changer transitions 0/189 dead transitions. [2024-06-04 16:02:11,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 189 transitions, 2210 flow [2024-06-04 16:02:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:11,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-04 16:02:11,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-04 16:02:11,453 INFO L175 Difference]: Start difference. First operand has 155 places, 166 transitions, 1688 flow. Second operand 8 states and 172 transitions. [2024-06-04 16:02:11,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 189 transitions, 2210 flow [2024-06-04 16:02:11,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 189 transitions, 2094 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:11,559 INFO L231 Difference]: Finished difference. Result has 158 places, 169 transitions, 1715 flow [2024-06-04 16:02:11,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1715, PETRI_PLACES=158, PETRI_TRANSITIONS=169} [2024-06-04 16:02:11,559 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-04 16:02:11,560 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 169 transitions, 1715 flow [2024-06-04 16:02:11,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:11,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:11,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:11,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 16:02:11,560 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:11,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:11,561 INFO L85 PathProgramCache]: Analyzing trace with hash -870994649, now seen corresponding path program 6 times [2024-06-04 16:02:11,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:11,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120298710] [2024-06-04 16:02:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:11,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:11,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:11,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120298710] [2024-06-04 16:02:11,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120298710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:11,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:11,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:11,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302761179] [2024-06-04 16:02:11,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:11,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:11,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:11,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:11,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:12,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:12,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 169 transitions, 1715 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:12,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:12,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:12,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:12,302 INFO L124 PetriNetUnfolderBase]: 1232/2084 cut-off events. [2024-06-04 16:02:12,302 INFO L125 PetriNetUnfolderBase]: For 44881/44881 co-relation queries the response was YES. [2024-06-04 16:02:12,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11631 conditions, 2084 events. 1232/2084 cut-off events. For 44881/44881 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11452 event pairs, 300 based on Foata normal form. 1/2085 useless extension candidates. Maximal degree in co-relation 11553. Up to 1861 conditions per place. [2024-06-04 16:02:12,319 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 136 selfloop transitions, 44 changer transitions 0/186 dead transitions. [2024-06-04 16:02:12,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 186 transitions, 2124 flow [2024-06-04 16:02:12,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:12,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-04 16:02:12,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-04 16:02:12,320 INFO L175 Difference]: Start difference. First operand has 158 places, 169 transitions, 1715 flow. Second operand 6 states and 137 transitions. [2024-06-04 16:02:12,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 186 transitions, 2124 flow [2024-06-04 16:02:12,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 186 transitions, 2019 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:12,419 INFO L231 Difference]: Finished difference. Result has 158 places, 169 transitions, 1708 flow [2024-06-04 16:02:12,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1610, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1708, PETRI_PLACES=158, PETRI_TRANSITIONS=169} [2024-06-04 16:02:12,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-04 16:02:12,420 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 169 transitions, 1708 flow [2024-06-04 16:02:12,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:12,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:12,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:12,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 16:02:12,421 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:12,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:12,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1476233490, now seen corresponding path program 1 times [2024-06-04 16:02:12,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:12,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845849458] [2024-06-04 16:02:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:12,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:12,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:12,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845849458] [2024-06-04 16:02:12,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845849458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:12,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:12,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:12,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430216574] [2024-06-04 16:02:12,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:12,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:12,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:12,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:12,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:12,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:12,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 169 transitions, 1708 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:12,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:12,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:12,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:13,231 INFO L124 PetriNetUnfolderBase]: 1245/2106 cut-off events. [2024-06-04 16:02:13,231 INFO L125 PetriNetUnfolderBase]: For 45502/45508 co-relation queries the response was YES. [2024-06-04 16:02:13,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11753 conditions, 2106 events. 1245/2106 cut-off events. For 45502/45508 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11622 event pairs, 308 based on Foata normal form. 7/2113 useless extension candidates. Maximal degree in co-relation 11675. Up to 1853 conditions per place. [2024-06-04 16:02:13,249 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 143 selfloop transitions, 45 changer transitions 0/194 dead transitions. [2024-06-04 16:02:13,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 194 transitions, 2260 flow [2024-06-04 16:02:13,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:13,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-04 16:02:13,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-04 16:02:13,257 INFO L175 Difference]: Start difference. First operand has 158 places, 169 transitions, 1708 flow. Second operand 8 states and 171 transitions. [2024-06-04 16:02:13,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 194 transitions, 2260 flow [2024-06-04 16:02:13,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 194 transitions, 2164 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:13,358 INFO L231 Difference]: Finished difference. Result has 161 places, 178 transitions, 1808 flow [2024-06-04 16:02:13,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1808, PETRI_PLACES=161, PETRI_TRANSITIONS=178} [2024-06-04 16:02:13,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-04 16:02:13,359 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 178 transitions, 1808 flow [2024-06-04 16:02:13,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:13,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:13,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:13,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 16:02:13,360 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:13,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:13,360 INFO L85 PathProgramCache]: Analyzing trace with hash -749313892, now seen corresponding path program 2 times [2024-06-04 16:02:13,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:13,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348602384] [2024-06-04 16:02:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:13,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:13,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:13,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348602384] [2024-06-04 16:02:13,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348602384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:13,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:13,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:13,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031243455] [2024-06-04 16:02:13,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:13,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:13,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:13,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:13,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:13,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:13,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 178 transitions, 1808 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:13,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:13,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:13,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:14,104 INFO L124 PetriNetUnfolderBase]: 1250/2113 cut-off events. [2024-06-04 16:02:14,105 INFO L125 PetriNetUnfolderBase]: For 45919/45925 co-relation queries the response was YES. [2024-06-04 16:02:14,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11971 conditions, 2113 events. 1250/2113 cut-off events. For 45919/45925 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11647 event pairs, 308 based on Foata normal form. 7/2120 useless extension candidates. Maximal degree in co-relation 11892. Up to 1859 conditions per place. [2024-06-04 16:02:14,126 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 144 selfloop transitions, 46 changer transitions 0/196 dead transitions. [2024-06-04 16:02:14,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 196 transitions, 2322 flow [2024-06-04 16:02:14,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-04 16:02:14,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-04 16:02:14,128 INFO L175 Difference]: Start difference. First operand has 161 places, 178 transitions, 1808 flow. Second operand 7 states and 153 transitions. [2024-06-04 16:02:14,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 196 transitions, 2322 flow [2024-06-04 16:02:14,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 196 transitions, 2260 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:14,217 INFO L231 Difference]: Finished difference. Result has 165 places, 181 transitions, 1892 flow [2024-06-04 16:02:14,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1892, PETRI_PLACES=165, PETRI_TRANSITIONS=181} [2024-06-04 16:02:14,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-04 16:02:14,217 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 181 transitions, 1892 flow [2024-06-04 16:02:14,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:14,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:14,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:14,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 16:02:14,217 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:14,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:14,218 INFO L85 PathProgramCache]: Analyzing trace with hash -785950312, now seen corresponding path program 3 times [2024-06-04 16:02:14,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:14,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071457132] [2024-06-04 16:02:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:14,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:14,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:14,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071457132] [2024-06-04 16:02:14,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071457132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:14,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:14,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:14,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826097246] [2024-06-04 16:02:14,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:14,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:14,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:14,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:14,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:14,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:14,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 181 transitions, 1892 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:14,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:14,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:14,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:14,889 INFO L124 PetriNetUnfolderBase]: 1247/2111 cut-off events. [2024-06-04 16:02:14,889 INFO L125 PetriNetUnfolderBase]: For 48876/48888 co-relation queries the response was YES. [2024-06-04 16:02:14,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12087 conditions, 2111 events. 1247/2111 cut-off events. For 48876/48888 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11666 event pairs, 320 based on Foata normal form. 13/2124 useless extension candidates. Maximal degree in co-relation 12006. Up to 1856 conditions per place. [2024-06-04 16:02:14,904 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 142 selfloop transitions, 42 changer transitions 0/190 dead transitions. [2024-06-04 16:02:14,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 190 transitions, 2282 flow [2024-06-04 16:02:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-04 16:02:14,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-04 16:02:14,905 INFO L175 Difference]: Start difference. First operand has 165 places, 181 transitions, 1892 flow. Second operand 5 states and 114 transitions. [2024-06-04 16:02:14,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 190 transitions, 2282 flow [2024-06-04 16:02:14,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 190 transitions, 2166 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:15,000 INFO L231 Difference]: Finished difference. Result has 164 places, 181 transitions, 1870 flow [2024-06-04 16:02:15,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1870, PETRI_PLACES=164, PETRI_TRANSITIONS=181} [2024-06-04 16:02:15,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-04 16:02:15,001 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 181 transitions, 1870 flow [2024-06-04 16:02:15,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:15,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:15,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:15,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 16:02:15,001 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:15,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:15,002 INFO L85 PathProgramCache]: Analyzing trace with hash -785710744, now seen corresponding path program 1 times [2024-06-04 16:02:15,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:15,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038413224] [2024-06-04 16:02:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:15,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:15,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:15,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038413224] [2024-06-04 16:02:15,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038413224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:15,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:15,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:15,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894348844] [2024-06-04 16:02:15,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:15,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:15,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:15,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:15,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:15,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:02:15,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 181 transitions, 1870 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:15,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:15,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:02:15,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:15,712 INFO L124 PetriNetUnfolderBase]: 1228/2084 cut-off events. [2024-06-04 16:02:15,713 INFO L125 PetriNetUnfolderBase]: For 49904/49913 co-relation queries the response was YES. [2024-06-04 16:02:15,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11831 conditions, 2084 events. 1228/2084 cut-off events. For 49904/49913 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11607 event pairs, 309 based on Foata normal form. 15/2088 useless extension candidates. Maximal degree in co-relation 11751. Up to 1773 conditions per place. [2024-06-04 16:02:15,729 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 151 selfloop transitions, 23 changer transitions 0/195 dead transitions. [2024-06-04 16:02:15,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 195 transitions, 2284 flow [2024-06-04 16:02:15,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-04 16:02:15,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-04 16:02:15,730 INFO L175 Difference]: Start difference. First operand has 164 places, 181 transitions, 1870 flow. Second operand 5 states and 118 transitions. [2024-06-04 16:02:15,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 195 transitions, 2284 flow [2024-06-04 16:02:15,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 195 transitions, 2194 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:15,819 INFO L231 Difference]: Finished difference. Result has 164 places, 182 transitions, 1849 flow [2024-06-04 16:02:15,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1849, PETRI_PLACES=164, PETRI_TRANSITIONS=182} [2024-06-04 16:02:15,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-04 16:02:15,860 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 182 transitions, 1849 flow [2024-06-04 16:02:15,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:15,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:15,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:15,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 16:02:15,861 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:15,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:15,861 INFO L85 PathProgramCache]: Analyzing trace with hash 523277960, now seen corresponding path program 4 times [2024-06-04 16:02:15,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:15,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275841135] [2024-06-04 16:02:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:15,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:16,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:16,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275841135] [2024-06-04 16:02:16,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275841135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:16,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:16,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:16,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355376315] [2024-06-04 16:02:16,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:16,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:16,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:16,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:16,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:16,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:16,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 182 transitions, 1849 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:16,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:16,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:16,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:16,628 INFO L124 PetriNetUnfolderBase]: 1288/2170 cut-off events. [2024-06-04 16:02:16,628 INFO L125 PetriNetUnfolderBase]: For 46145/46145 co-relation queries the response was YES. [2024-06-04 16:02:16,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12315 conditions, 2170 events. 1288/2170 cut-off events. For 46145/46145 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 11928 event pairs, 303 based on Foata normal form. 1/2171 useless extension candidates. Maximal degree in co-relation 12235. Up to 1905 conditions per place. [2024-06-04 16:02:16,644 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 158 selfloop transitions, 56 changer transitions 0/220 dead transitions. [2024-06-04 16:02:16,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 220 transitions, 2506 flow [2024-06-04 16:02:16,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:02:16,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:02:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-04 16:02:16,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:02:16,645 INFO L175 Difference]: Start difference. First operand has 164 places, 182 transitions, 1849 flow. Second operand 11 states and 231 transitions. [2024-06-04 16:02:16,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 220 transitions, 2506 flow [2024-06-04 16:02:16,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 220 transitions, 2465 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:16,732 INFO L231 Difference]: Finished difference. Result has 173 places, 191 transitions, 2038 flow [2024-06-04 16:02:16,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2038, PETRI_PLACES=173, PETRI_TRANSITIONS=191} [2024-06-04 16:02:16,732 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-04 16:02:16,733 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 191 transitions, 2038 flow [2024-06-04 16:02:16,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:16,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:16,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:16,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 16:02:16,733 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:16,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:16,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1442081884, now seen corresponding path program 5 times [2024-06-04 16:02:16,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:16,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123364012] [2024-06-04 16:02:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:16,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:17,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:17,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123364012] [2024-06-04 16:02:17,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123364012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:17,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:17,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:17,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30452895] [2024-06-04 16:02:17,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:17,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:17,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:17,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:17,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:17,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:17,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 191 transitions, 2038 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:17,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:17,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:17,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:17,508 INFO L124 PetriNetUnfolderBase]: 1301/2193 cut-off events. [2024-06-04 16:02:17,508 INFO L125 PetriNetUnfolderBase]: For 50348/50352 co-relation queries the response was YES. [2024-06-04 16:02:17,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12803 conditions, 2193 events. 1301/2193 cut-off events. For 50348/50352 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12135 event pairs, 312 based on Foata normal form. 5/2198 useless extension candidates. Maximal degree in co-relation 12721. Up to 1920 conditions per place. [2024-06-04 16:02:17,527 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 153 selfloop transitions, 60 changer transitions 0/219 dead transitions. [2024-06-04 16:02:17,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 219 transitions, 2735 flow [2024-06-04 16:02:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-04 16:02:17,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-04 16:02:17,529 INFO L175 Difference]: Start difference. First operand has 173 places, 191 transitions, 2038 flow. Second operand 9 states and 190 transitions. [2024-06-04 16:02:17,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 219 transitions, 2735 flow [2024-06-04 16:02:17,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 219 transitions, 2593 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:17,631 INFO L231 Difference]: Finished difference. Result has 175 places, 197 transitions, 2106 flow [2024-06-04 16:02:17,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2106, PETRI_PLACES=175, PETRI_TRANSITIONS=197} [2024-06-04 16:02:17,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-04 16:02:17,632 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 197 transitions, 2106 flow [2024-06-04 16:02:17,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:17,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:17,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:17,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 16:02:17,635 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:17,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:17,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1230864214, now seen corresponding path program 6 times [2024-06-04 16:02:17,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:17,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135202966] [2024-06-04 16:02:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:17,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:17,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:17,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135202966] [2024-06-04 16:02:17,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135202966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:17,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:17,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:17,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873605484] [2024-06-04 16:02:17,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:17,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:17,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:17,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:17,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:18,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:18,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 197 transitions, 2106 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:18,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:18,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:18,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:18,389 INFO L124 PetriNetUnfolderBase]: 1298/2184 cut-off events. [2024-06-04 16:02:18,389 INFO L125 PetriNetUnfolderBase]: For 51064/51064 co-relation queries the response was YES. [2024-06-04 16:02:18,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12688 conditions, 2184 events. 1298/2184 cut-off events. For 51064/51064 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12018 event pairs, 303 based on Foata normal form. 1/2185 useless extension candidates. Maximal degree in co-relation 12606. Up to 1917 conditions per place. [2024-06-04 16:02:18,405 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 156 selfloop transitions, 62 changer transitions 0/224 dead transitions. [2024-06-04 16:02:18,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 224 transitions, 2681 flow [2024-06-04 16:02:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-04 16:02:18,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-04 16:02:18,407 INFO L175 Difference]: Start difference. First operand has 175 places, 197 transitions, 2106 flow. Second operand 9 states and 197 transitions. [2024-06-04 16:02:18,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 224 transitions, 2681 flow [2024-06-04 16:02:18,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 224 transitions, 2562 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:18,502 INFO L231 Difference]: Finished difference. Result has 180 places, 197 transitions, 2121 flow [2024-06-04 16:02:18,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2121, PETRI_PLACES=180, PETRI_TRANSITIONS=197} [2024-06-04 16:02:18,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-04 16:02:18,502 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 197 transitions, 2121 flow [2024-06-04 16:02:18,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:18,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:18,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:18,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 16:02:18,503 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:18,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1441932154, now seen corresponding path program 7 times [2024-06-04 16:02:18,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:18,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135335331] [2024-06-04 16:02:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:18,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:18,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:18,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135335331] [2024-06-04 16:02:18,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135335331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:18,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:18,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:18,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818697518] [2024-06-04 16:02:18,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:18,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:18,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:18,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:18,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:18,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:18,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 197 transitions, 2121 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:18,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:18,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:18,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:19,248 INFO L124 PetriNetUnfolderBase]: 1295/2185 cut-off events. [2024-06-04 16:02:19,248 INFO L125 PetriNetUnfolderBase]: For 53806/53810 co-relation queries the response was YES. [2024-06-04 16:02:19,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12700 conditions, 2185 events. 1295/2185 cut-off events. For 53806/53810 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12056 event pairs, 312 based on Foata normal form. 5/2190 useless extension candidates. Maximal degree in co-relation 12617. Up to 1914 conditions per place. [2024-06-04 16:02:19,266 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 152 selfloop transitions, 58 changer transitions 0/216 dead transitions. [2024-06-04 16:02:19,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 216 transitions, 2594 flow [2024-06-04 16:02:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-04 16:02:19,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-04 16:02:19,268 INFO L175 Difference]: Start difference. First operand has 180 places, 197 transitions, 2121 flow. Second operand 8 states and 172 transitions. [2024-06-04 16:02:19,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 216 transitions, 2594 flow [2024-06-04 16:02:19,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 216 transitions, 2459 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 16:02:19,371 INFO L231 Difference]: Finished difference. Result has 180 places, 197 transitions, 2108 flow [2024-06-04 16:02:19,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2108, PETRI_PLACES=180, PETRI_TRANSITIONS=197} [2024-06-04 16:02:19,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-04 16:02:19,372 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 197 transitions, 2108 flow [2024-06-04 16:02:19,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:19,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:19,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:19,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 16:02:19,372 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:19,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:19,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1008668056, now seen corresponding path program 2 times [2024-06-04 16:02:19,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:19,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071160566] [2024-06-04 16:02:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:19,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:19,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:19,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071160566] [2024-06-04 16:02:19,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071160566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:19,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:19,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:19,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338760088] [2024-06-04 16:02:19,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:19,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:19,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:19,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:19,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:02:19,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 197 transitions, 2108 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:19,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:19,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:02:19,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:20,126 INFO L124 PetriNetUnfolderBase]: 1276/2175 cut-off events. [2024-06-04 16:02:20,126 INFO L125 PetriNetUnfolderBase]: For 58281/58283 co-relation queries the response was YES. [2024-06-04 16:02:20,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12619 conditions, 2175 events. 1276/2175 cut-off events. For 58281/58283 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12231 event pairs, 305 based on Foata normal form. 9/2175 useless extension candidates. Maximal degree in co-relation 12537. Up to 1843 conditions per place. [2024-06-04 16:02:20,144 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 168 selfloop transitions, 27 changer transitions 0/221 dead transitions. [2024-06-04 16:02:20,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 221 transitions, 2597 flow [2024-06-04 16:02:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:20,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-04 16:02:20,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:02:20,147 INFO L175 Difference]: Start difference. First operand has 180 places, 197 transitions, 2108 flow. Second operand 8 states and 176 transitions. [2024-06-04 16:02:20,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 221 transitions, 2597 flow [2024-06-04 16:02:20,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 221 transitions, 2473 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:20,259 INFO L231 Difference]: Finished difference. Result has 183 places, 198 transitions, 2060 flow [2024-06-04 16:02:20,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2060, PETRI_PLACES=183, PETRI_TRANSITIONS=198} [2024-06-04 16:02:20,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-04 16:02:20,260 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 198 transitions, 2060 flow [2024-06-04 16:02:20,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:20,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:20,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:20,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 16:02:20,261 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:20,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:20,261 INFO L85 PathProgramCache]: Analyzing trace with hash -994383256, now seen corresponding path program 3 times [2024-06-04 16:02:20,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:20,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53035045] [2024-06-04 16:02:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:20,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:20,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:20,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53035045] [2024-06-04 16:02:20,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53035045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:20,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:20,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:20,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295782785] [2024-06-04 16:02:20,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:20,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:20,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:20,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:20,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:20,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:02:20,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 198 transitions, 2060 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:20,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:20,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:02:20,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:21,026 INFO L124 PetriNetUnfolderBase]: 1284/2187 cut-off events. [2024-06-04 16:02:21,026 INFO L125 PetriNetUnfolderBase]: For 57832/57832 co-relation queries the response was YES. [2024-06-04 16:02:21,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12541 conditions, 2187 events. 1284/2187 cut-off events. For 57832/57832 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12260 event pairs, 299 based on Foata normal form. 8/2188 useless extension candidates. Maximal degree in co-relation 12459. Up to 1787 conditions per place. [2024-06-04 16:02:21,042 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 168 selfloop transitions, 31 changer transitions 0/225 dead transitions. [2024-06-04 16:02:21,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 225 transitions, 2579 flow [2024-06-04 16:02:21,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:21,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-04 16:02:21,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-04 16:02:21,044 INFO L175 Difference]: Start difference. First operand has 183 places, 198 transitions, 2060 flow. Second operand 8 states and 178 transitions. [2024-06-04 16:02:21,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 225 transitions, 2579 flow [2024-06-04 16:02:21,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 225 transitions, 2523 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:21,167 INFO L231 Difference]: Finished difference. Result has 185 places, 199 transitions, 2088 flow [2024-06-04 16:02:21,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2088, PETRI_PLACES=185, PETRI_TRANSITIONS=199} [2024-06-04 16:02:21,168 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-04 16:02:21,168 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 199 transitions, 2088 flow [2024-06-04 16:02:21,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:21,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:21,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:21,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 16:02:21,169 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:21,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:21,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1479793488, now seen corresponding path program 1 times [2024-06-04 16:02:21,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:21,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83267793] [2024-06-04 16:02:21,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:21,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:21,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:21,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83267793] [2024-06-04 16:02:21,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83267793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:21,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:21,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:21,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866783339] [2024-06-04 16:02:21,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:21,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:21,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:21,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:21,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:21,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:02:21,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 199 transitions, 2088 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:21,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:21,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:02:21,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:21,803 INFO L124 PetriNetUnfolderBase]: 1308/2220 cut-off events. [2024-06-04 16:02:21,803 INFO L125 PetriNetUnfolderBase]: For 59200/59200 co-relation queries the response was YES. [2024-06-04 16:02:21,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12773 conditions, 2220 events. 1308/2220 cut-off events. For 59200/59200 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12474 event pairs, 271 based on Foata normal form. 4/2219 useless extension candidates. Maximal degree in co-relation 12690. Up to 1832 conditions per place. [2024-06-04 16:02:21,822 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 156 selfloop transitions, 46 changer transitions 0/226 dead transitions. [2024-06-04 16:02:21,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 226 transitions, 2672 flow [2024-06-04 16:02:21,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:21,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:21,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-04 16:02:21,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-04 16:02:21,823 INFO L175 Difference]: Start difference. First operand has 185 places, 199 transitions, 2088 flow. Second operand 7 states and 162 transitions. [2024-06-04 16:02:21,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 226 transitions, 2672 flow [2024-06-04 16:02:21,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 226 transitions, 2604 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:21,950 INFO L231 Difference]: Finished difference. Result has 186 places, 203 transitions, 2173 flow [2024-06-04 16:02:21,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2020, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2173, PETRI_PLACES=186, PETRI_TRANSITIONS=203} [2024-06-04 16:02:21,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-04 16:02:21,950 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 203 transitions, 2173 flow [2024-06-04 16:02:21,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:21,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:21,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:21,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 16:02:21,951 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:21,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:21,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1482650448, now seen corresponding path program 2 times [2024-06-04 16:02:21,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:21,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175386876] [2024-06-04 16:02:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:21,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:22,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:22,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175386876] [2024-06-04 16:02:22,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175386876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:22,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:22,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:22,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780955977] [2024-06-04 16:02:22,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:22,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:22,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:22,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:22,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:22,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:02:22,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 203 transitions, 2173 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:22,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:22,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:02:22,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:22,603 INFO L124 PetriNetUnfolderBase]: 1322/2238 cut-off events. [2024-06-04 16:02:22,603 INFO L125 PetriNetUnfolderBase]: For 62466/62466 co-relation queries the response was YES. [2024-06-04 16:02:22,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13030 conditions, 2238 events. 1322/2238 cut-off events. For 62466/62466 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12596 event pairs, 306 based on Foata normal form. 4/2237 useless extension candidates. Maximal degree in co-relation 12946. Up to 1918 conditions per place. [2024-06-04 16:02:22,621 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 155 selfloop transitions, 44 changer transitions 0/223 dead transitions. [2024-06-04 16:02:22,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 223 transitions, 2645 flow [2024-06-04 16:02:22,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-04 16:02:22,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-04 16:02:22,622 INFO L175 Difference]: Start difference. First operand has 186 places, 203 transitions, 2173 flow. Second operand 7 states and 157 transitions. [2024-06-04 16:02:22,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 223 transitions, 2645 flow [2024-06-04 16:02:22,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 223 transitions, 2557 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:22,779 INFO L231 Difference]: Finished difference. Result has 190 places, 205 transitions, 2213 flow [2024-06-04 16:02:22,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2213, PETRI_PLACES=190, PETRI_TRANSITIONS=205} [2024-06-04 16:02:22,779 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-04 16:02:22,780 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 205 transitions, 2213 flow [2024-06-04 16:02:22,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:22,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:22,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:22,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 16:02:22,780 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:22,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:22,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1597941618, now seen corresponding path program 3 times [2024-06-04 16:02:22,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:22,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354755353] [2024-06-04 16:02:22,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:22,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:23,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:23,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354755353] [2024-06-04 16:02:23,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354755353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:23,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:23,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:23,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019422516] [2024-06-04 16:02:23,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:23,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:23,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:23,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:23,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:23,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:02:23,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 205 transitions, 2213 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:23,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:23,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:02:23,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:23,447 INFO L124 PetriNetUnfolderBase]: 1336/2260 cut-off events. [2024-06-04 16:02:23,447 INFO L125 PetriNetUnfolderBase]: For 65831/65831 co-relation queries the response was YES. [2024-06-04 16:02:23,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13218 conditions, 2260 events. 1336/2260 cut-off events. For 65831/65831 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12758 event pairs, 306 based on Foata normal form. 4/2259 useless extension candidates. Maximal degree in co-relation 13132. Up to 1968 conditions per place. [2024-06-04 16:02:23,464 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 167 selfloop transitions, 31 changer transitions 0/222 dead transitions. [2024-06-04 16:02:23,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 222 transitions, 2671 flow [2024-06-04 16:02:23,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-04 16:02:23,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-04 16:02:23,465 INFO L175 Difference]: Start difference. First operand has 190 places, 205 transitions, 2213 flow. Second operand 7 states and 153 transitions. [2024-06-04 16:02:23,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 222 transitions, 2671 flow [2024-06-04 16:02:23,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 222 transitions, 2573 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:23,588 INFO L231 Difference]: Finished difference. Result has 192 places, 207 transitions, 2213 flow [2024-06-04 16:02:23,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2213, PETRI_PLACES=192, PETRI_TRANSITIONS=207} [2024-06-04 16:02:23,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-04 16:02:23,589 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 207 transitions, 2213 flow [2024-06-04 16:02:23,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:23,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:23,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:23,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 16:02:23,589 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:23,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:23,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1598126316, now seen corresponding path program 1 times [2024-06-04 16:02:23,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:23,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233212385] [2024-06-04 16:02:23,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:23,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:23,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:23,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233212385] [2024-06-04 16:02:23,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233212385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:23,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:23,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:23,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276113972] [2024-06-04 16:02:23,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:23,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:23,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:23,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:23,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:23,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:23,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 207 transitions, 2213 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:23,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:23,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:23,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:24,214 INFO L124 PetriNetUnfolderBase]: 1389/2330 cut-off events. [2024-06-04 16:02:24,214 INFO L125 PetriNetUnfolderBase]: For 67132/67132 co-relation queries the response was YES. [2024-06-04 16:02:24,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13649 conditions, 2330 events. 1389/2330 cut-off events. For 67132/67132 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13039 event pairs, 309 based on Foata normal form. 2/2332 useless extension candidates. Maximal degree in co-relation 13562. Up to 2125 conditions per place. [2024-06-04 16:02:24,235 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 194 selfloop transitions, 25 changer transitions 0/225 dead transitions. [2024-06-04 16:02:24,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 225 transitions, 2718 flow [2024-06-04 16:02:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:24,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-04 16:02:24,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-04 16:02:24,236 INFO L175 Difference]: Start difference. First operand has 192 places, 207 transitions, 2213 flow. Second operand 7 states and 149 transitions. [2024-06-04 16:02:24,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 225 transitions, 2718 flow [2024-06-04 16:02:24,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 225 transitions, 2642 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:24,404 INFO L231 Difference]: Finished difference. Result has 194 places, 209 transitions, 2218 flow [2024-06-04 16:02:24,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2218, PETRI_PLACES=194, PETRI_TRANSITIONS=209} [2024-06-04 16:02:24,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-04 16:02:24,404 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 209 transitions, 2218 flow [2024-06-04 16:02:24,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:24,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:24,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:24,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 16:02:24,405 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:24,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:24,406 INFO L85 PathProgramCache]: Analyzing trace with hash -376916670, now seen corresponding path program 4 times [2024-06-04 16:02:24,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:24,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264284324] [2024-06-04 16:02:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:24,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:24,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:24,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264284324] [2024-06-04 16:02:24,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264284324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:24,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:24,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:24,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327339726] [2024-06-04 16:02:24,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:24,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:24,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:24,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:24,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:24,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:02:24,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 209 transitions, 2218 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:24,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:24,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:02:24,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:25,097 INFO L124 PetriNetUnfolderBase]: 1332/2256 cut-off events. [2024-06-04 16:02:25,097 INFO L125 PetriNetUnfolderBase]: For 68421/68421 co-relation queries the response was YES. [2024-06-04 16:02:25,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13126 conditions, 2256 events. 1332/2256 cut-off events. For 68421/68421 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 12722 event pairs, 267 based on Foata normal form. 4/2255 useless extension candidates. Maximal degree in co-relation 13038. Up to 1892 conditions per place. [2024-06-04 16:02:25,116 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 161 selfloop transitions, 43 changer transitions 0/229 dead transitions. [2024-06-04 16:02:25,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 229 transitions, 2676 flow [2024-06-04 16:02:25,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-04 16:02:25,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-04 16:02:25,117 INFO L175 Difference]: Start difference. First operand has 194 places, 209 transitions, 2218 flow. Second operand 6 states and 143 transitions. [2024-06-04 16:02:25,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 229 transitions, 2676 flow [2024-06-04 16:02:25,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 229 transitions, 2599 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:25,291 INFO L231 Difference]: Finished difference. Result has 195 places, 209 transitions, 2241 flow [2024-06-04 16:02:25,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2241, PETRI_PLACES=195, PETRI_TRANSITIONS=209} [2024-06-04 16:02:25,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-04 16:02:25,292 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 209 transitions, 2241 flow [2024-06-04 16:02:25,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:25,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:25,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:25,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 16:02:25,292 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:25,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:25,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1230849334, now seen corresponding path program 2 times [2024-06-04 16:02:25,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:25,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624798459] [2024-06-04 16:02:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:25,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:25,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:25,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624798459] [2024-06-04 16:02:25,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624798459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:25,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:25,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:25,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907851264] [2024-06-04 16:02:25,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:25,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:25,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:25,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:25,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:25,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:25,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 209 transitions, 2241 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:25,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:25,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:25,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:25,935 INFO L124 PetriNetUnfolderBase]: 1387/2328 cut-off events. [2024-06-04 16:02:25,935 INFO L125 PetriNetUnfolderBase]: For 70332/70332 co-relation queries the response was YES. [2024-06-04 16:02:25,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13697 conditions, 2328 events. 1387/2328 cut-off events. For 70332/70332 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 13013 event pairs, 307 based on Foata normal form. 2/2330 useless extension candidates. Maximal degree in co-relation 13608. Up to 2117 conditions per place. [2024-06-04 16:02:25,955 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 193 selfloop transitions, 27 changer transitions 0/226 dead transitions. [2024-06-04 16:02:25,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 226 transitions, 2750 flow [2024-06-04 16:02:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:25,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-04 16:02:25,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:02:25,956 INFO L175 Difference]: Start difference. First operand has 195 places, 209 transitions, 2241 flow. Second operand 6 states and 132 transitions. [2024-06-04 16:02:25,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 226 transitions, 2750 flow [2024-06-04 16:02:26,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 226 transitions, 2654 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:26,118 INFO L231 Difference]: Finished difference. Result has 196 places, 211 transitions, 2237 flow [2024-06-04 16:02:26,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2237, PETRI_PLACES=196, PETRI_TRANSITIONS=211} [2024-06-04 16:02:26,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-04 16:02:26,119 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 211 transitions, 2237 flow [2024-06-04 16:02:26,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:26,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:26,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:26,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 16:02:26,120 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:26,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:26,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1002948184, now seen corresponding path program 3 times [2024-06-04 16:02:26,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:26,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378529513] [2024-06-04 16:02:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:26,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:26,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:26,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378529513] [2024-06-04 16:02:26,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378529513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:26,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:26,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:26,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378601442] [2024-06-04 16:02:26,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:26,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:26,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:26,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:26,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:26,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:26,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 211 transitions, 2237 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:26,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:26,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:26,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:26,760 INFO L124 PetriNetUnfolderBase]: 1395/2341 cut-off events. [2024-06-04 16:02:26,760 INFO L125 PetriNetUnfolderBase]: For 71218/71222 co-relation queries the response was YES. [2024-06-04 16:02:26,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13805 conditions, 2341 events. 1395/2341 cut-off events. For 71218/71222 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13135 event pairs, 314 based on Foata normal form. 6/2347 useless extension candidates. Maximal degree in co-relation 13715. Up to 2135 conditions per place. [2024-06-04 16:02:26,781 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 195 selfloop transitions, 24 changer transitions 0/225 dead transitions. [2024-06-04 16:02:26,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 225 transitions, 2740 flow [2024-06-04 16:02:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-04 16:02:26,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-04 16:02:26,782 INFO L175 Difference]: Start difference. First operand has 196 places, 211 transitions, 2237 flow. Second operand 6 states and 128 transitions. [2024-06-04 16:02:26,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 225 transitions, 2740 flow [2024-06-04 16:02:26,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 225 transitions, 2664 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:26,931 INFO L231 Difference]: Finished difference. Result has 198 places, 213 transitions, 2248 flow [2024-06-04 16:02:26,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2165, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2248, PETRI_PLACES=198, PETRI_TRANSITIONS=213} [2024-06-04 16:02:26,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-04 16:02:26,931 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 213 transitions, 2248 flow [2024-06-04 16:02:26,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:26,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:26,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:26,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 16:02:26,932 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:26,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:26,933 INFO L85 PathProgramCache]: Analyzing trace with hash -994377304, now seen corresponding path program 4 times [2024-06-04 16:02:26,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:26,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033990042] [2024-06-04 16:02:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:26,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:27,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:27,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033990042] [2024-06-04 16:02:27,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033990042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:27,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:27,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:27,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327596817] [2024-06-04 16:02:27,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:27,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:27,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:27,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:27,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:27,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:27,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 213 transitions, 2248 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:27,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:27,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:27,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:27,632 INFO L124 PetriNetUnfolderBase]: 1390/2334 cut-off events. [2024-06-04 16:02:27,632 INFO L125 PetriNetUnfolderBase]: For 69252/69256 co-relation queries the response was YES. [2024-06-04 16:02:27,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13639 conditions, 2334 events. 1390/2334 cut-off events. For 69252/69256 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13073 event pairs, 303 based on Foata normal form. 6/2340 useless extension candidates. Maximal degree in co-relation 13548. Up to 2102 conditions per place. [2024-06-04 16:02:27,652 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 191 selfloop transitions, 31 changer transitions 0/228 dead transitions. [2024-06-04 16:02:27,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 228 transitions, 2759 flow [2024-06-04 16:02:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-04 16:02:27,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-04 16:02:27,654 INFO L175 Difference]: Start difference. First operand has 198 places, 213 transitions, 2248 flow. Second operand 6 states and 129 transitions. [2024-06-04 16:02:27,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 228 transitions, 2759 flow [2024-06-04 16:02:27,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 228 transitions, 2692 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:27,830 INFO L231 Difference]: Finished difference. Result has 200 places, 215 transitions, 2282 flow [2024-06-04 16:02:27,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2282, PETRI_PLACES=200, PETRI_TRANSITIONS=215} [2024-06-04 16:02:27,830 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-04 16:02:27,830 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 215 transitions, 2282 flow [2024-06-04 16:02:27,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:27,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:27,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:27,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 16:02:27,831 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:27,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:27,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2104420354, now seen corresponding path program 1 times [2024-06-04 16:02:27,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:27,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056914332] [2024-06-04 16:02:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:27,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:28,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:28,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056914332] [2024-06-04 16:02:28,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056914332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:28,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:28,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:28,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650318089] [2024-06-04 16:02:28,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:28,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:28,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:28,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:28,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:28,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:28,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 215 transitions, 2282 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:28,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:28,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:28,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:28,609 INFO L124 PetriNetUnfolderBase]: 1418/2380 cut-off events. [2024-06-04 16:02:28,609 INFO L125 PetriNetUnfolderBase]: For 76080/76080 co-relation queries the response was YES. [2024-06-04 16:02:28,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14015 conditions, 2380 events. 1418/2380 cut-off events. For 76080/76080 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13381 event pairs, 246 based on Foata normal form. 6/2385 useless extension candidates. Maximal degree in co-relation 13923. Up to 2001 conditions per place. [2024-06-04 16:02:28,630 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 206 selfloop transitions, 30 changer transitions 0/242 dead transitions. [2024-06-04 16:02:28,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 242 transitions, 2967 flow [2024-06-04 16:02:28,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:28,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-04 16:02:28,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-04 16:02:28,631 INFO L175 Difference]: Start difference. First operand has 200 places, 215 transitions, 2282 flow. Second operand 7 states and 158 transitions. [2024-06-04 16:02:28,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 242 transitions, 2967 flow [2024-06-04 16:02:28,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 242 transitions, 2872 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:28,829 INFO L231 Difference]: Finished difference. Result has 203 places, 218 transitions, 2287 flow [2024-06-04 16:02:28,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2287, PETRI_PLACES=203, PETRI_TRANSITIONS=218} [2024-06-04 16:02:28,830 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-04 16:02:28,830 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 218 transitions, 2287 flow [2024-06-04 16:02:28,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:28,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:28,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:28,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 16:02:28,831 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:28,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:28,831 INFO L85 PathProgramCache]: Analyzing trace with hash -945087486, now seen corresponding path program 2 times [2024-06-04 16:02:28,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:28,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636091629] [2024-06-04 16:02:28,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:28,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:29,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:29,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636091629] [2024-06-04 16:02:29,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636091629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:29,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:29,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:29,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416276450] [2024-06-04 16:02:29,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:29,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:29,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:29,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:29,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:29,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:29,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 218 transitions, 2287 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:29,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:29,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:29,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:29,656 INFO L124 PetriNetUnfolderBase]: 1405/2361 cut-off events. [2024-06-04 16:02:29,656 INFO L125 PetriNetUnfolderBase]: For 73838/73838 co-relation queries the response was YES. [2024-06-04 16:02:29,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13743 conditions, 2361 events. 1405/2361 cut-off events. For 73838/73838 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13230 event pairs, 235 based on Foata normal form. 6/2366 useless extension candidates. Maximal degree in co-relation 13650. Up to 1995 conditions per place. [2024-06-04 16:02:29,675 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 203 selfloop transitions, 30 changer transitions 0/239 dead transitions. [2024-06-04 16:02:29,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 239 transitions, 2845 flow [2024-06-04 16:02:29,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-04 16:02:29,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-04 16:02:29,676 INFO L175 Difference]: Start difference. First operand has 203 places, 218 transitions, 2287 flow. Second operand 6 states and 140 transitions. [2024-06-04 16:02:29,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 239 transitions, 2845 flow [2024-06-04 16:02:29,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 239 transitions, 2764 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:29,830 INFO L231 Difference]: Finished difference. Result has 205 places, 218 transitions, 2272 flow [2024-06-04 16:02:29,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2206, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2272, PETRI_PLACES=205, PETRI_TRANSITIONS=218} [2024-06-04 16:02:29,830 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-04 16:02:29,830 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 218 transitions, 2272 flow [2024-06-04 16:02:29,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:29,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:29,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:29,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 16:02:29,831 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:29,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:29,831 INFO L85 PathProgramCache]: Analyzing trace with hash 130452904, now seen corresponding path program 1 times [2024-06-04 16:02:29,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:29,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150256357] [2024-06-04 16:02:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:29,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:30,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:30,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150256357] [2024-06-04 16:02:30,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150256357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:30,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:30,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:30,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628882965] [2024-06-04 16:02:30,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:30,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:30,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:30,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:30,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:30,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:30,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 218 transitions, 2272 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:30,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:30,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:30,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:30,528 INFO L124 PetriNetUnfolderBase]: 1418/2381 cut-off events. [2024-06-04 16:02:30,528 INFO L125 PetriNetUnfolderBase]: For 72995/72995 co-relation queries the response was YES. [2024-06-04 16:02:30,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13845 conditions, 2381 events. 1418/2381 cut-off events. For 72995/72995 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13395 event pairs, 323 based on Foata normal form. 1/2381 useless extension candidates. Maximal degree in co-relation 13752. Up to 2048 conditions per place. [2024-06-04 16:02:30,547 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 176 selfloop transitions, 59 changer transitions 0/241 dead transitions. [2024-06-04 16:02:30,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 241 transitions, 2964 flow [2024-06-04 16:02:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-04 16:02:30,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-04 16:02:30,548 INFO L175 Difference]: Start difference. First operand has 205 places, 218 transitions, 2272 flow. Second operand 6 states and 143 transitions. [2024-06-04 16:02:30,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 241 transitions, 2964 flow [2024-06-04 16:02:30,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 241 transitions, 2894 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:30,695 INFO L231 Difference]: Finished difference. Result has 206 places, 224 transitions, 2433 flow [2024-06-04 16:02:30,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2433, PETRI_PLACES=206, PETRI_TRANSITIONS=224} [2024-06-04 16:02:30,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-04 16:02:30,696 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 224 transitions, 2433 flow [2024-06-04 16:02:30,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:30,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:30,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:30,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 16:02:30,696 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:30,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:30,697 INFO L85 PathProgramCache]: Analyzing trace with hash -437784058, now seen corresponding path program 1 times [2024-06-04 16:02:30,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:30,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053499644] [2024-06-04 16:02:30,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:30,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:30,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:30,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053499644] [2024-06-04 16:02:30,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053499644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:30,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:30,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:30,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940032742] [2024-06-04 16:02:30,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:30,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:30,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:30,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:30,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:31,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:31,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 224 transitions, 2433 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:31,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:31,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:31,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:31,443 INFO L124 PetriNetUnfolderBase]: 1467/2458 cut-off events. [2024-06-04 16:02:31,443 INFO L125 PetriNetUnfolderBase]: For 75798/75798 co-relation queries the response was YES. [2024-06-04 16:02:31,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14658 conditions, 2458 events. 1467/2458 cut-off events. For 75798/75798 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 13881 event pairs, 322 based on Foata normal form. 1/2458 useless extension candidates. Maximal degree in co-relation 14565. Up to 2150 conditions per place. [2024-06-04 16:02:31,466 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 190 selfloop transitions, 67 changer transitions 0/263 dead transitions. [2024-06-04 16:02:31,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 263 transitions, 3417 flow [2024-06-04 16:02:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-04 16:02:31,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-04 16:02:31,467 INFO L175 Difference]: Start difference. First operand has 206 places, 224 transitions, 2433 flow. Second operand 7 states and 159 transitions. [2024-06-04 16:02:31,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 263 transitions, 3417 flow [2024-06-04 16:02:31,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 263 transitions, 3325 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:31,684 INFO L231 Difference]: Finished difference. Result has 212 places, 247 transitions, 2906 flow [2024-06-04 16:02:31,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2906, PETRI_PLACES=212, PETRI_TRANSITIONS=247} [2024-06-04 16:02:31,684 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-04 16:02:31,685 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 247 transitions, 2906 flow [2024-06-04 16:02:31,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:31,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:31,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:31,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 16:02:31,685 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:31,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:31,686 INFO L85 PathProgramCache]: Analyzing trace with hash -437784244, now seen corresponding path program 2 times [2024-06-04 16:02:31,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:31,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556297080] [2024-06-04 16:02:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:31,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:32,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:32,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556297080] [2024-06-04 16:02:32,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556297080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:32,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:32,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:32,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081456336] [2024-06-04 16:02:32,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:32,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:32,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:32,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:32,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:32,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:32,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 247 transitions, 2906 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:32,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:32,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:32,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:32,473 INFO L124 PetriNetUnfolderBase]: 1472/2467 cut-off events. [2024-06-04 16:02:32,473 INFO L125 PetriNetUnfolderBase]: For 77454/77454 co-relation queries the response was YES. [2024-06-04 16:02:32,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15175 conditions, 2467 events. 1472/2467 cut-off events. For 77454/77454 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13946 event pairs, 322 based on Foata normal form. 1/2467 useless extension candidates. Maximal degree in co-relation 15079. Up to 2165 conditions per place. [2024-06-04 16:02:32,496 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 205 selfloop transitions, 52 changer transitions 0/263 dead transitions. [2024-06-04 16:02:32,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 263 transitions, 3502 flow [2024-06-04 16:02:32,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:32,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-04 16:02:32,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:02:32,497 INFO L175 Difference]: Start difference. First operand has 212 places, 247 transitions, 2906 flow. Second operand 6 states and 138 transitions. [2024-06-04 16:02:32,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 263 transitions, 3502 flow [2024-06-04 16:02:32,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 263 transitions, 3441 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:32,712 INFO L231 Difference]: Finished difference. Result has 216 places, 250 transitions, 3019 flow [2024-06-04 16:02:32,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2845, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3019, PETRI_PLACES=216, PETRI_TRANSITIONS=250} [2024-06-04 16:02:32,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-04 16:02:32,712 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 250 transitions, 3019 flow [2024-06-04 16:02:32,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:32,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:32,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:32,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 16:02:32,713 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:32,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:32,714 INFO L85 PathProgramCache]: Analyzing trace with hash -944995230, now seen corresponding path program 2 times [2024-06-04 16:02:32,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:32,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146615017] [2024-06-04 16:02:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:32,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:33,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:33,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146615017] [2024-06-04 16:02:33,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146615017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:33,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:33,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:33,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813972259] [2024-06-04 16:02:33,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:33,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:33,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:33,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:33,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:33,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:33,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 250 transitions, 3019 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:33,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:33,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:33,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:33,503 INFO L124 PetriNetUnfolderBase]: 1477/2474 cut-off events. [2024-06-04 16:02:33,503 INFO L125 PetriNetUnfolderBase]: For 80731/80731 co-relation queries the response was YES. [2024-06-04 16:02:33,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15434 conditions, 2474 events. 1477/2474 cut-off events. For 80731/80731 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 13998 event pairs, 322 based on Foata normal form. 1/2474 useless extension candidates. Maximal degree in co-relation 15336. Up to 2163 conditions per place. [2024-06-04 16:02:33,529 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 70 changer transitions 0/268 dead transitions. [2024-06-04 16:02:33,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 268 transitions, 3745 flow [2024-06-04 16:02:33,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:33,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-04 16:02:33,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-04 16:02:33,531 INFO L175 Difference]: Start difference. First operand has 216 places, 250 transitions, 3019 flow. Second operand 6 states and 140 transitions. [2024-06-04 16:02:33,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 268 transitions, 3745 flow [2024-06-04 16:02:33,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 268 transitions, 3612 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:33,820 INFO L231 Difference]: Finished difference. Result has 219 places, 254 transitions, 3173 flow [2024-06-04 16:02:33,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2888, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3173, PETRI_PLACES=219, PETRI_TRANSITIONS=254} [2024-06-04 16:02:33,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-04 16:02:33,821 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 254 transitions, 3173 flow [2024-06-04 16:02:33,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:33,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:33,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:33,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 16:02:33,822 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:33,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:33,822 INFO L85 PathProgramCache]: Analyzing trace with hash 911921036, now seen corresponding path program 3 times [2024-06-04 16:02:33,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:33,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36121014] [2024-06-04 16:02:33,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:33,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:34,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:34,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36121014] [2024-06-04 16:02:34,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36121014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:34,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:34,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:34,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072511160] [2024-06-04 16:02:34,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:34,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:34,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:34,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:34,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:34,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:34,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 254 transitions, 3173 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:34,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:34,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:34,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:34,597 INFO L124 PetriNetUnfolderBase]: 1474/2470 cut-off events. [2024-06-04 16:02:34,598 INFO L125 PetriNetUnfolderBase]: For 82732/82732 co-relation queries the response was YES. [2024-06-04 16:02:34,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15560 conditions, 2470 events. 1474/2470 cut-off events. For 82732/82732 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 13963 event pairs, 322 based on Foata normal form. 1/2470 useless extension candidates. Maximal degree in co-relation 15460. Up to 2118 conditions per place. [2024-06-04 16:02:34,621 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 198 selfloop transitions, 65 changer transitions 0/269 dead transitions. [2024-06-04 16:02:34,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 269 transitions, 3737 flow [2024-06-04 16:02:34,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:34,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-04 16:02:34,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:02:34,627 INFO L175 Difference]: Start difference. First operand has 219 places, 254 transitions, 3173 flow. Second operand 5 states and 123 transitions. [2024-06-04 16:02:34,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 269 transitions, 3737 flow [2024-06-04 16:02:34,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 269 transitions, 3608 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:34,920 INFO L231 Difference]: Finished difference. Result has 221 places, 254 transitions, 3212 flow [2024-06-04 16:02:34,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3044, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3212, PETRI_PLACES=221, PETRI_TRANSITIONS=254} [2024-06-04 16:02:34,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-04 16:02:34,920 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 254 transitions, 3212 flow [2024-06-04 16:02:34,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:34,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:34,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:34,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 16:02:34,921 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:34,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:34,921 INFO L85 PathProgramCache]: Analyzing trace with hash -944758080, now seen corresponding path program 3 times [2024-06-04 16:02:34,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:34,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90356399] [2024-06-04 16:02:34,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:34,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:35,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:35,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90356399] [2024-06-04 16:02:35,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90356399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:35,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:35,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:35,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939719752] [2024-06-04 16:02:35,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:35,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:35,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:35,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:35,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:35,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:35,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 254 transitions, 3212 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:35,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:35,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:35,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:35,646 INFO L124 PetriNetUnfolderBase]: 1471/2466 cut-off events. [2024-06-04 16:02:35,647 INFO L125 PetriNetUnfolderBase]: For 85024/85024 co-relation queries the response was YES. [2024-06-04 16:02:35,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15591 conditions, 2466 events. 1471/2466 cut-off events. For 85024/85024 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 13967 event pairs, 322 based on Foata normal form. 1/2466 useless extension candidates. Maximal degree in co-relation 15490. Up to 2156 conditions per place. [2024-06-04 16:02:35,669 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 70 changer transitions 0/268 dead transitions. [2024-06-04 16:02:35,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 268 transitions, 3770 flow [2024-06-04 16:02:35,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:35,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-04 16:02:35,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-04 16:02:35,671 INFO L175 Difference]: Start difference. First operand has 221 places, 254 transitions, 3212 flow. Second operand 7 states and 157 transitions. [2024-06-04 16:02:35,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 268 transitions, 3770 flow [2024-06-04 16:02:35,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 268 transitions, 3588 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:35,936 INFO L231 Difference]: Finished difference. Result has 223 places, 254 transitions, 3184 flow [2024-06-04 16:02:35,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3184, PETRI_PLACES=223, PETRI_TRANSITIONS=254} [2024-06-04 16:02:35,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-04 16:02:35,937 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 254 transitions, 3184 flow [2024-06-04 16:02:35,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:35,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:35,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:35,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 16:02:35,937 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:35,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash -511646168, now seen corresponding path program 4 times [2024-06-04 16:02:35,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:35,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405775794] [2024-06-04 16:02:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:35,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:36,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:36,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405775794] [2024-06-04 16:02:36,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405775794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:36,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:36,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:36,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828326525] [2024-06-04 16:02:36,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:36,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:36,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:36,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:36,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:36,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:36,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 254 transitions, 3184 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:36,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:36,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:36,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:36,622 INFO L124 PetriNetUnfolderBase]: 1484/2494 cut-off events. [2024-06-04 16:02:36,622 INFO L125 PetriNetUnfolderBase]: For 83220/83220 co-relation queries the response was YES. [2024-06-04 16:02:36,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15688 conditions, 2494 events. 1484/2494 cut-off events. For 83220/83220 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 14165 event pairs, 322 based on Foata normal form. 1/2494 useless extension candidates. Maximal degree in co-relation 15587. Up to 2061 conditions per place. [2024-06-04 16:02:36,645 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 202 selfloop transitions, 77 changer transitions 0/285 dead transitions. [2024-06-04 16:02:36,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 285 transitions, 4142 flow [2024-06-04 16:02:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:36,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:02:36,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-04 16:02:36,646 INFO L175 Difference]: Start difference. First operand has 223 places, 254 transitions, 3184 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:02:36,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 285 transitions, 4142 flow [2024-06-04 16:02:36,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 285 transitions, 3978 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:36,896 INFO L231 Difference]: Finished difference. Result has 224 places, 263 transitions, 3352 flow [2024-06-04 16:02:36,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3024, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3352, PETRI_PLACES=224, PETRI_TRANSITIONS=263} [2024-06-04 16:02:36,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-04 16:02:36,897 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 263 transitions, 3352 flow [2024-06-04 16:02:36,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:36,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:36,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:36,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 16:02:36,898 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:36,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:36,898 INFO L85 PathProgramCache]: Analyzing trace with hash 383998418, now seen corresponding path program 5 times [2024-06-04 16:02:36,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:36,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109380711] [2024-06-04 16:02:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:36,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:37,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:37,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109380711] [2024-06-04 16:02:37,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109380711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:37,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:37,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:37,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376272163] [2024-06-04 16:02:37,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:37,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:37,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:37,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:37,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:37,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:37,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 263 transitions, 3352 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:37,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:37,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:37,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:37,571 INFO L124 PetriNetUnfolderBase]: 1489/2503 cut-off events. [2024-06-04 16:02:37,572 INFO L125 PetriNetUnfolderBase]: For 85106/85106 co-relation queries the response was YES. [2024-06-04 16:02:37,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16010 conditions, 2503 events. 1489/2503 cut-off events. For 85106/85106 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14254 event pairs, 322 based on Foata normal form. 1/2503 useless extension candidates. Maximal degree in co-relation 15909. Up to 2067 conditions per place. [2024-06-04 16:02:37,594 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 86 changer transitions 0/288 dead transitions. [2024-06-04 16:02:37,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 288 transitions, 4214 flow [2024-06-04 16:02:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:02:37,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-04 16:02:37,595 INFO L175 Difference]: Start difference. First operand has 224 places, 263 transitions, 3352 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:02:37,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 288 transitions, 4214 flow [2024-06-04 16:02:37,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 288 transitions, 3990 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:37,857 INFO L231 Difference]: Finished difference. Result has 228 places, 266 transitions, 3366 flow [2024-06-04 16:02:37,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3146, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3366, PETRI_PLACES=228, PETRI_TRANSITIONS=266} [2024-06-04 16:02:37,857 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-04 16:02:37,858 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 266 transitions, 3366 flow [2024-06-04 16:02:37,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:37,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:37,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:37,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 16:02:37,858 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:37,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:37,859 INFO L85 PathProgramCache]: Analyzing trace with hash 384296948, now seen corresponding path program 6 times [2024-06-04 16:02:37,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:37,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674560891] [2024-06-04 16:02:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:37,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:38,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:38,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674560891] [2024-06-04 16:02:38,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674560891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:38,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:38,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:38,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113533860] [2024-06-04 16:02:38,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:38,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:38,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:38,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:38,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:38,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:38,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 266 transitions, 3366 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:38,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:38,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:38,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:38,672 INFO L124 PetriNetUnfolderBase]: 1494/2512 cut-off events. [2024-06-04 16:02:38,673 INFO L125 PetriNetUnfolderBase]: For 86372/86372 co-relation queries the response was YES. [2024-06-04 16:02:38,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15880 conditions, 2512 events. 1494/2512 cut-off events. For 86372/86372 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 14316 event pairs, 322 based on Foata normal form. 1/2512 useless extension candidates. Maximal degree in co-relation 15778. Up to 2073 conditions per place. [2024-06-04 16:02:38,692 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 191 selfloop transitions, 90 changer transitions 0/287 dead transitions. [2024-06-04 16:02:38,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 287 transitions, 4114 flow [2024-06-04 16:02:38,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:38,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-04 16:02:38,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-04 16:02:38,693 INFO L175 Difference]: Start difference. First operand has 228 places, 266 transitions, 3366 flow. Second operand 7 states and 160 transitions. [2024-06-04 16:02:38,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 287 transitions, 4114 flow [2024-06-04 16:02:38,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 287 transitions, 3897 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:38,952 INFO L231 Difference]: Finished difference. Result has 230 places, 269 transitions, 3383 flow [2024-06-04 16:02:38,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3155, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3383, PETRI_PLACES=230, PETRI_TRANSITIONS=269} [2024-06-04 16:02:38,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-04 16:02:38,953 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 269 transitions, 3383 flow [2024-06-04 16:02:38,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:38,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:38,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:38,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 16:02:38,954 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:38,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash 384297320, now seen corresponding path program 1 times [2024-06-04 16:02:38,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:38,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134408034] [2024-06-04 16:02:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:38,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:39,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:39,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134408034] [2024-06-04 16:02:39,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134408034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:39,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:39,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:39,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690095490] [2024-06-04 16:02:39,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:39,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:39,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:39,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:39,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:39,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:39,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 269 transitions, 3383 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:39,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:39,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:39,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:39,678 INFO L124 PetriNetUnfolderBase]: 1507/2535 cut-off events. [2024-06-04 16:02:39,679 INFO L125 PetriNetUnfolderBase]: For 90585/90591 co-relation queries the response was YES. [2024-06-04 16:02:39,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16079 conditions, 2535 events. 1507/2535 cut-off events. For 90585/90591 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 14484 event pairs, 313 based on Foata normal form. 7/2542 useless extension candidates. Maximal degree in co-relation 15976. Up to 2139 conditions per place. [2024-06-04 16:02:39,701 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 104 changer transitions 0/296 dead transitions. [2024-06-04 16:02:39,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 296 transitions, 4189 flow [2024-06-04 16:02:39,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:39,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:39,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-04 16:02:39,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-04 16:02:39,703 INFO L175 Difference]: Start difference. First operand has 230 places, 269 transitions, 3383 flow. Second operand 10 states and 211 transitions. [2024-06-04 16:02:39,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 296 transitions, 4189 flow [2024-06-04 16:02:39,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 296 transitions, 4030 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:39,982 INFO L231 Difference]: Finished difference. Result has 236 places, 275 transitions, 3528 flow [2024-06-04 16:02:39,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3224, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3528, PETRI_PLACES=236, PETRI_TRANSITIONS=275} [2024-06-04 16:02:39,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-04 16:02:39,982 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 275 transitions, 3528 flow [2024-06-04 16:02:39,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:39,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:39,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:39,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 16:02:39,983 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:39,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:39,983 INFO L85 PathProgramCache]: Analyzing trace with hash 378756194, now seen corresponding path program 4 times [2024-06-04 16:02:39,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:39,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463107828] [2024-06-04 16:02:39,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:39,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:40,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:40,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463107828] [2024-06-04 16:02:40,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463107828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:40,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:40,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:40,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743034938] [2024-06-04 16:02:40,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:40,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:40,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:40,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:40,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:40,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:40,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 275 transitions, 3528 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:40,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:40,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:40,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:40,773 INFO L124 PetriNetUnfolderBase]: 1525/2563 cut-off events. [2024-06-04 16:02:40,774 INFO L125 PetriNetUnfolderBase]: For 96634/96634 co-relation queries the response was YES. [2024-06-04 16:02:40,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16646 conditions, 2563 events. 1525/2563 cut-off events. For 96634/96634 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 14670 event pairs, 321 based on Foata normal form. 1/2563 useless extension candidates. Maximal degree in co-relation 16542. Up to 2165 conditions per place. [2024-06-04 16:02:40,798 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 202 selfloop transitions, 97 changer transitions 0/305 dead transitions. [2024-06-04 16:02:40,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 305 transitions, 4412 flow [2024-06-04 16:02:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:40,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:40,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-04 16:02:40,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-04 16:02:40,799 INFO L175 Difference]: Start difference. First operand has 236 places, 275 transitions, 3528 flow. Second operand 10 states and 211 transitions. [2024-06-04 16:02:40,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 305 transitions, 4412 flow [2024-06-04 16:02:41,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 305 transitions, 4251 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:41,161 INFO L231 Difference]: Finished difference. Result has 239 places, 284 transitions, 3713 flow [2024-06-04 16:02:41,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3713, PETRI_PLACES=239, PETRI_TRANSITIONS=284} [2024-06-04 16:02:41,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-04 16:02:41,161 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 284 transitions, 3713 flow [2024-06-04 16:02:41,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:41,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:41,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:41,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 16:02:41,162 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:41,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:41,162 INFO L85 PathProgramCache]: Analyzing trace with hash -60445466, now seen corresponding path program 7 times [2024-06-04 16:02:41,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:41,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832376420] [2024-06-04 16:02:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:41,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:41,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:41,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832376420] [2024-06-04 16:02:41,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832376420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:41,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:41,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:41,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775469779] [2024-06-04 16:02:41,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:41,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:41,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:41,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:41,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:41,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:41,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 284 transitions, 3713 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:41,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:41,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:41,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:41,872 INFO L124 PetriNetUnfolderBase]: 1530/2572 cut-off events. [2024-06-04 16:02:41,872 INFO L125 PetriNetUnfolderBase]: For 98175/98175 co-relation queries the response was YES. [2024-06-04 16:02:41,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17008 conditions, 2572 events. 1530/2572 cut-off events. For 98175/98175 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 14760 event pairs, 321 based on Foata normal form. 1/2572 useless extension candidates. Maximal degree in co-relation 16903. Up to 2230 conditions per place. [2024-06-04 16:02:41,896 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 245 selfloop transitions, 53 changer transitions 0/304 dead transitions. [2024-06-04 16:02:41,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 304 transitions, 4396 flow [2024-06-04 16:02:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:41,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-04 16:02:41,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-04 16:02:41,897 INFO L175 Difference]: Start difference. First operand has 239 places, 284 transitions, 3713 flow. Second operand 7 states and 155 transitions. [2024-06-04 16:02:41,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 304 transitions, 4396 flow [2024-06-04 16:02:42,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 304 transitions, 4142 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:42,245 INFO L231 Difference]: Finished difference. Result has 240 places, 287 transitions, 3622 flow [2024-06-04 16:02:42,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3459, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3622, PETRI_PLACES=240, PETRI_TRANSITIONS=287} [2024-06-04 16:02:42,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-04 16:02:42,246 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 287 transitions, 3622 flow [2024-06-04 16:02:42,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:42,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:42,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:42,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 16:02:42,246 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:42,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:42,247 INFO L85 PathProgramCache]: Analyzing trace with hash 388016018, now seen corresponding path program 8 times [2024-06-04 16:02:42,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:42,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788491114] [2024-06-04 16:02:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:42,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:42,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:42,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788491114] [2024-06-04 16:02:42,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788491114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:42,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:42,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:42,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753519286] [2024-06-04 16:02:42,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:42,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:42,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:42,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:42,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:42,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:42,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 287 transitions, 3622 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:42,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:42,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:42,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:42,992 INFO L124 PetriNetUnfolderBase]: 1548/2603 cut-off events. [2024-06-04 16:02:42,993 INFO L125 PetriNetUnfolderBase]: For 101054/101054 co-relation queries the response was YES. [2024-06-04 16:02:43,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16993 conditions, 2603 events. 1548/2603 cut-off events. For 101054/101054 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14972 event pairs, 321 based on Foata normal form. 1/2603 useless extension candidates. Maximal degree in co-relation 16887. Up to 2234 conditions per place. [2024-06-04 16:02:43,018 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 237 selfloop transitions, 68 changer transitions 0/311 dead transitions. [2024-06-04 16:02:43,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 311 transitions, 4495 flow [2024-06-04 16:02:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-04 16:02:43,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-04 16:02:43,019 INFO L175 Difference]: Start difference. First operand has 240 places, 287 transitions, 3622 flow. Second operand 7 states and 156 transitions. [2024-06-04 16:02:43,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 311 transitions, 4495 flow [2024-06-04 16:02:43,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 311 transitions, 4357 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:43,326 INFO L231 Difference]: Finished difference. Result has 243 places, 296 transitions, 3785 flow [2024-06-04 16:02:43,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3785, PETRI_PLACES=243, PETRI_TRANSITIONS=296} [2024-06-04 16:02:43,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-04 16:02:43,326 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 296 transitions, 3785 flow [2024-06-04 16:02:43,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:43,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:43,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:43,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 16:02:43,327 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:43,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:43,327 INFO L85 PathProgramCache]: Analyzing trace with hash 388016390, now seen corresponding path program 2 times [2024-06-04 16:02:43,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:43,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866125138] [2024-06-04 16:02:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:43,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:43,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:43,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866125138] [2024-06-04 16:02:43,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866125138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:43,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:43,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:43,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924588828] [2024-06-04 16:02:43,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:43,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:43,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:43,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:43,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:43,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:43,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 296 transitions, 3785 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:43,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:43,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:43,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:44,162 INFO L124 PetriNetUnfolderBase]: 1566/2635 cut-off events. [2024-06-04 16:02:44,162 INFO L125 PetriNetUnfolderBase]: For 105845/105851 co-relation queries the response was YES. [2024-06-04 16:02:44,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17334 conditions, 2635 events. 1566/2635 cut-off events. For 105845/105851 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15179 event pairs, 313 based on Foata normal form. 7/2642 useless extension candidates. Maximal degree in co-relation 17226. Up to 2291 conditions per place. [2024-06-04 16:02:44,190 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 236 selfloop transitions, 81 changer transitions 0/323 dead transitions. [2024-06-04 16:02:44,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 323 transitions, 4677 flow [2024-06-04 16:02:44,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:44,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-04 16:02:44,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073170731707317 [2024-06-04 16:02:44,192 INFO L175 Difference]: Start difference. First operand has 243 places, 296 transitions, 3785 flow. Second operand 10 states and 208 transitions. [2024-06-04 16:02:44,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 323 transitions, 4677 flow [2024-06-04 16:02:44,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 323 transitions, 4575 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:44,565 INFO L231 Difference]: Finished difference. Result has 252 places, 305 transitions, 3999 flow [2024-06-04 16:02:44,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3685, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3999, PETRI_PLACES=252, PETRI_TRANSITIONS=305} [2024-06-04 16:02:44,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-04 16:02:44,566 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 305 transitions, 3999 flow [2024-06-04 16:02:44,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:44,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:44,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:44,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 16:02:44,566 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:44,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:44,567 INFO L85 PathProgramCache]: Analyzing trace with hash -51179690, now seen corresponding path program 5 times [2024-06-04 16:02:44,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:44,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480567605] [2024-06-04 16:02:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:44,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:44,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:44,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480567605] [2024-06-04 16:02:44,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480567605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:44,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:44,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:44,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63579130] [2024-06-04 16:02:44,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:44,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:44,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:44,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:44,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:44,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:44,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 305 transitions, 3999 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:44,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:44,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:44,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:45,342 INFO L124 PetriNetUnfolderBase]: 1579/2654 cut-off events. [2024-06-04 16:02:45,342 INFO L125 PetriNetUnfolderBase]: For 111038/111038 co-relation queries the response was YES. [2024-06-04 16:02:45,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17651 conditions, 2654 events. 1579/2654 cut-off events. For 111038/111038 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15304 event pairs, 321 based on Foata normal form. 1/2654 useless extension candidates. Maximal degree in co-relation 17541. Up to 2234 conditions per place. [2024-06-04 16:02:45,369 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 222 selfloop transitions, 101 changer transitions 0/329 dead transitions. [2024-06-04 16:02:45,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 329 transitions, 4975 flow [2024-06-04 16:02:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:45,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:45,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-04 16:02:45,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-04 16:02:45,371 INFO L175 Difference]: Start difference. First operand has 252 places, 305 transitions, 3999 flow. Second operand 9 states and 195 transitions. [2024-06-04 16:02:45,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 329 transitions, 4975 flow [2024-06-04 16:02:45,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 329 transitions, 4901 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:45,757 INFO L231 Difference]: Finished difference. Result has 256 places, 311 transitions, 4214 flow [2024-06-04 16:02:45,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3925, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4214, PETRI_PLACES=256, PETRI_TRANSITIONS=311} [2024-06-04 16:02:45,757 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-04 16:02:45,757 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 311 transitions, 4214 flow [2024-06-04 16:02:45,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:45,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:45,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:45,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 16:02:45,758 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:45,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:45,758 INFO L85 PathProgramCache]: Analyzing trace with hash 388010624, now seen corresponding path program 6 times [2024-06-04 16:02:45,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:45,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446426277] [2024-06-04 16:02:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:45,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:46,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:46,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446426277] [2024-06-04 16:02:46,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446426277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:46,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:46,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:46,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920426897] [2024-06-04 16:02:46,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:46,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:46,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:46,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:46,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:46,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:46,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 311 transitions, 4214 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:46,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:46,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:46,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:46,519 INFO L124 PetriNetUnfolderBase]: 1576/2650 cut-off events. [2024-06-04 16:02:46,519 INFO L125 PetriNetUnfolderBase]: For 113750/113750 co-relation queries the response was YES. [2024-06-04 16:02:46,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17850 conditions, 2650 events. 1576/2650 cut-off events. For 113750/113750 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15302 event pairs, 321 based on Foata normal form. 1/2650 useless extension candidates. Maximal degree in co-relation 17738. Up to 2231 conditions per place. [2024-06-04 16:02:46,546 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 221 selfloop transitions, 103 changer transitions 0/330 dead transitions. [2024-06-04 16:02:46,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 330 transitions, 5012 flow [2024-06-04 16:02:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:02:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:02:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-04 16:02:46,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055432372505543 [2024-06-04 16:02:46,547 INFO L175 Difference]: Start difference. First operand has 256 places, 311 transitions, 4214 flow. Second operand 11 states and 228 transitions. [2024-06-04 16:02:46,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 330 transitions, 5012 flow [2024-06-04 16:02:46,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 330 transitions, 4812 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:46,919 INFO L231 Difference]: Finished difference. Result has 262 places, 311 transitions, 4226 flow [2024-06-04 16:02:46,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4226, PETRI_PLACES=262, PETRI_TRANSITIONS=311} [2024-06-04 16:02:46,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-04 16:02:46,920 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 311 transitions, 4226 flow [2024-06-04 16:02:46,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:46,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:46,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:46,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 16:02:46,920 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:46,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:46,920 INFO L85 PathProgramCache]: Analyzing trace with hash -51179504, now seen corresponding path program 3 times [2024-06-04 16:02:46,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:46,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483688785] [2024-06-04 16:02:46,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:46,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:47,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:47,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483688785] [2024-06-04 16:02:47,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483688785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:47,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:47,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:47,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836464174] [2024-06-04 16:02:47,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:47,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:47,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:47,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:47,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:47,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:47,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 311 transitions, 4226 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:47,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:47,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:47,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:47,884 INFO L124 PetriNetUnfolderBase]: 1573/2649 cut-off events. [2024-06-04 16:02:47,885 INFO L125 PetriNetUnfolderBase]: For 115956/115962 co-relation queries the response was YES. [2024-06-04 16:02:47,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17830 conditions, 2649 events. 1573/2649 cut-off events. For 115956/115962 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15334 event pairs, 313 based on Foata normal form. 7/2656 useless extension candidates. Maximal degree in co-relation 17717. Up to 2302 conditions per place. [2024-06-04 16:02:47,913 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 242 selfloop transitions, 81 changer transitions 0/329 dead transitions. [2024-06-04 16:02:47,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 329 transitions, 4914 flow [2024-06-04 16:02:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:02:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:02:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-04 16:02:47,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49667405764966743 [2024-06-04 16:02:47,914 INFO L175 Difference]: Start difference. First operand has 262 places, 311 transitions, 4226 flow. Second operand 11 states and 224 transitions. [2024-06-04 16:02:47,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 329 transitions, 4914 flow [2024-06-04 16:02:48,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 329 transitions, 4661 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-04 16:02:48,330 INFO L231 Difference]: Finished difference. Result has 263 places, 311 transitions, 4146 flow [2024-06-04 16:02:48,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3973, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4146, PETRI_PLACES=263, PETRI_TRANSITIONS=311} [2024-06-04 16:02:48,331 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-04 16:02:48,331 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 311 transitions, 4146 flow [2024-06-04 16:02:48,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:48,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:48,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:48,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 16:02:48,331 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:48,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:48,332 INFO L85 PathProgramCache]: Analyzing trace with hash 388010438, now seen corresponding path program 9 times [2024-06-04 16:02:48,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:48,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702262515] [2024-06-04 16:02:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:48,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:48,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:48,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702262515] [2024-06-04 16:02:48,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702262515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:48,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:48,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:48,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131820848] [2024-06-04 16:02:48,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:48,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:48,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:48,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:48,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:48,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:48,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 311 transitions, 4146 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:48,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:48,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:48,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:49,302 INFO L124 PetriNetUnfolderBase]: 1570/2642 cut-off events. [2024-06-04 16:02:49,302 INFO L125 PetriNetUnfolderBase]: For 117939/117939 co-relation queries the response was YES. [2024-06-04 16:02:49,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17739 conditions, 2642 events. 1570/2642 cut-off events. For 117939/117939 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15274 event pairs, 321 based on Foata normal form. 1/2642 useless extension candidates. Maximal degree in co-relation 17625. Up to 2263 conditions per place. [2024-06-04 16:02:49,342 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 248 selfloop transitions, 73 changer transitions 0/327 dead transitions. [2024-06-04 16:02:49,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 327 transitions, 4826 flow [2024-06-04 16:02:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:49,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-04 16:02:49,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:02:49,343 INFO L175 Difference]: Start difference. First operand has 263 places, 311 transitions, 4146 flow. Second operand 9 states and 189 transitions. [2024-06-04 16:02:49,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 327 transitions, 4826 flow [2024-06-04 16:02:49,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 327 transitions, 4638 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-04 16:02:49,791 INFO L231 Difference]: Finished difference. Result has 263 places, 311 transitions, 4110 flow [2024-06-04 16:02:49,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3958, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4110, PETRI_PLACES=263, PETRI_TRANSITIONS=311} [2024-06-04 16:02:49,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-04 16:02:49,792 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 311 transitions, 4110 flow [2024-06-04 16:02:49,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:49,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:49,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:49,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 16:02:49,793 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:49,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:49,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1405143162, now seen corresponding path program 7 times [2024-06-04 16:02:49,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:49,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820998551] [2024-06-04 16:02:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:49,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:50,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:50,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820998551] [2024-06-04 16:02:50,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820998551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:50,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:50,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:50,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215982457] [2024-06-04 16:02:50,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:50,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:50,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:50,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:50,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:50,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:50,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 311 transitions, 4110 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:50,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:50,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:50,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:50,509 INFO L124 PetriNetUnfolderBase]: 1583/2664 cut-off events. [2024-06-04 16:02:50,509 INFO L125 PetriNetUnfolderBase]: For 123377/123377 co-relation queries the response was YES. [2024-06-04 16:02:50,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17961 conditions, 2664 events. 1583/2664 cut-off events. For 123377/123377 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15429 event pairs, 321 based on Foata normal form. 1/2664 useless extension candidates. Maximal degree in co-relation 17846. Up to 2238 conditions per place. [2024-06-04 16:02:50,535 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 224 selfloop transitions, 104 changer transitions 0/334 dead transitions. [2024-06-04 16:02:50,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 334 transitions, 5116 flow [2024-06-04 16:02:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-04 16:02:50,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:02:50,536 INFO L175 Difference]: Start difference. First operand has 263 places, 311 transitions, 4110 flow. Second operand 8 states and 176 transitions. [2024-06-04 16:02:50,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 334 transitions, 5116 flow [2024-06-04 16:02:50,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 334 transitions, 4945 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 16:02:50,993 INFO L231 Difference]: Finished difference. Result has 263 places, 317 transitions, 4245 flow [2024-06-04 16:02:51,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3939, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4245, PETRI_PLACES=263, PETRI_TRANSITIONS=317} [2024-06-04 16:02:51,003 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-04 16:02:51,003 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 317 transitions, 4245 flow [2024-06-04 16:02:51,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:51,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:51,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:51,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 16:02:51,004 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:51,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:51,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1753893118, now seen corresponding path program 4 times [2024-06-04 16:02:51,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:51,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797824275] [2024-06-04 16:02:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:51,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:51,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:51,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797824275] [2024-06-04 16:02:51,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797824275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:51,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:51,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:51,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783099711] [2024-06-04 16:02:51,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:51,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:51,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:51,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:51,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:51,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:51,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 317 transitions, 4245 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:51,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:51,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:51,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:51,917 INFO L124 PetriNetUnfolderBase]: 1620/2725 cut-off events. [2024-06-04 16:02:51,917 INFO L125 PetriNetUnfolderBase]: For 131250/131256 co-relation queries the response was YES. [2024-06-04 16:02:51,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18619 conditions, 2725 events. 1620/2725 cut-off events. For 131250/131256 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15823 event pairs, 313 based on Foata normal form. 7/2732 useless extension candidates. Maximal degree in co-relation 18503. Up to 2315 conditions per place. [2024-06-04 16:02:51,945 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 241 selfloop transitions, 107 changer transitions 0/354 dead transitions. [2024-06-04 16:02:51,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 354 transitions, 5432 flow [2024-06-04 16:02:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-04 16:02:51,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-04 16:02:51,950 INFO L175 Difference]: Start difference. First operand has 263 places, 317 transitions, 4245 flow. Second operand 10 states and 213 transitions. [2024-06-04 16:02:51,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 354 transitions, 5432 flow [2024-06-04 16:02:52,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 354 transitions, 5253 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:52,345 INFO L231 Difference]: Finished difference. Result has 269 places, 332 transitions, 4567 flow [2024-06-04 16:02:52,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4070, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4567, PETRI_PLACES=269, PETRI_TRANSITIONS=332} [2024-06-04 16:02:52,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-04 16:02:52,345 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 332 transitions, 4567 flow [2024-06-04 16:02:52,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:52,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:52,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:52,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 16:02:52,346 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:52,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:52,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1412494812, now seen corresponding path program 8 times [2024-06-04 16:02:52,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:52,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808221065] [2024-06-04 16:02:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:52,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:52,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:52,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808221065] [2024-06-04 16:02:52,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808221065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:52,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:52,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:52,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916484396] [2024-06-04 16:02:52,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:52,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:52,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:52,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:52,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:52,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:52,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 332 transitions, 4567 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:52,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:52,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:52,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:53,104 INFO L124 PetriNetUnfolderBase]: 1617/2722 cut-off events. [2024-06-04 16:02:53,105 INFO L125 PetriNetUnfolderBase]: For 132961/132967 co-relation queries the response was YES. [2024-06-04 16:02:53,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18666 conditions, 2722 events. 1617/2722 cut-off events. For 132961/132967 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15840 event pairs, 352 based on Foata normal form. 7/2728 useless extension candidates. Maximal degree in co-relation 18549. Up to 2287 conditions per place. [2024-06-04 16:02:53,134 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 242 selfloop transitions, 95 changer transitions 0/343 dead transitions. [2024-06-04 16:02:53,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 343 transitions, 5381 flow [2024-06-04 16:02:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-04 16:02:53,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:02:53,135 INFO L175 Difference]: Start difference. First operand has 269 places, 332 transitions, 4567 flow. Second operand 6 states and 135 transitions. [2024-06-04 16:02:53,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 343 transitions, 5381 flow [2024-06-04 16:02:53,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 343 transitions, 5242 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:53,720 INFO L231 Difference]: Finished difference. Result has 269 places, 332 transitions, 4628 flow [2024-06-04 16:02:53,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4432, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4628, PETRI_PLACES=269, PETRI_TRANSITIONS=332} [2024-06-04 16:02:53,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-04 16:02:53,721 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 332 transitions, 4628 flow [2024-06-04 16:02:53,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:53,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:53,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:53,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 16:02:53,721 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:53,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:53,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1405137396, now seen corresponding path program 10 times [2024-06-04 16:02:53,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:53,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468965461] [2024-06-04 16:02:53,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:53,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:54,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:54,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468965461] [2024-06-04 16:02:54,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468965461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:54,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:54,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:54,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053576875] [2024-06-04 16:02:54,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:54,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:54,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:54,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:54,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:54,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:54,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 332 transitions, 4628 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:54,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:54,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:54,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:54,572 INFO L124 PetriNetUnfolderBase]: 1614/2714 cut-off events. [2024-06-04 16:02:54,572 INFO L125 PetriNetUnfolderBase]: For 124613/124613 co-relation queries the response was YES. [2024-06-04 16:02:54,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18627 conditions, 2714 events. 1614/2714 cut-off events. For 124613/124613 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15728 event pairs, 321 based on Foata normal form. 1/2714 useless extension candidates. Maximal degree in co-relation 18510. Up to 2238 conditions per place. [2024-06-04 16:02:54,599 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 246 selfloop transitions, 100 changer transitions 0/352 dead transitions. [2024-06-04 16:02:54,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 352 transitions, 5482 flow [2024-06-04 16:02:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:54,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:02:54,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-04 16:02:54,600 INFO L175 Difference]: Start difference. First operand has 269 places, 332 transitions, 4628 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:02:54,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 352 transitions, 5482 flow [2024-06-04 16:02:55,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 352 transitions, 5256 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:55,018 INFO L231 Difference]: Finished difference. Result has 270 places, 332 transitions, 4619 flow [2024-06-04 16:02:55,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4402, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4619, PETRI_PLACES=270, PETRI_TRANSITIONS=332} [2024-06-04 16:02:55,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-04 16:02:55,019 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 332 transitions, 4619 flow [2024-06-04 16:02:55,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:55,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:55,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:55,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 16:02:55,020 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:55,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:55,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1753898698, now seen corresponding path program 5 times [2024-06-04 16:02:55,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:55,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867945036] [2024-06-04 16:02:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:55,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:55,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:55,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867945036] [2024-06-04 16:02:55,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867945036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:55,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:55,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:55,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914186161] [2024-06-04 16:02:55,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:55,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:55,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:55,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:55,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:55,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 332 transitions, 4619 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:55,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:55,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:55,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:55,978 INFO L124 PetriNetUnfolderBase]: 1611/2713 cut-off events. [2024-06-04 16:02:55,978 INFO L125 PetriNetUnfolderBase]: For 127187/127193 co-relation queries the response was YES. [2024-06-04 16:02:56,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18663 conditions, 2713 events. 1611/2713 cut-off events. For 127187/127193 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15768 event pairs, 313 based on Foata normal form. 7/2720 useless extension candidates. Maximal degree in co-relation 18545. Up to 2304 conditions per place. [2024-06-04 16:02:56,019 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 238 selfloop transitions, 107 changer transitions 0/351 dead transitions. [2024-06-04 16:02:56,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 351 transitions, 5469 flow [2024-06-04 16:02:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:56,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:56,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-04 16:02:56,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:02:56,021 INFO L175 Difference]: Start difference. First operand has 270 places, 332 transitions, 4619 flow. Second operand 8 states and 176 transitions. [2024-06-04 16:02:56,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 351 transitions, 5469 flow [2024-06-04 16:02:56,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 351 transitions, 5176 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:56,458 INFO L231 Difference]: Finished difference. Result has 271 places, 332 transitions, 4562 flow [2024-06-04 16:02:56,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4330, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4562, PETRI_PLACES=271, PETRI_TRANSITIONS=332} [2024-06-04 16:02:56,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-04 16:02:56,459 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 332 transitions, 4562 flow [2024-06-04 16:02:56,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:56,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:56,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:56,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 16:02:56,459 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:56,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:56,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1412494998, now seen corresponding path program 6 times [2024-06-04 16:02:56,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:56,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466622610] [2024-06-04 16:02:56,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:56,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:56,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:56,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466622610] [2024-06-04 16:02:56,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466622610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:56,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:56,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:56,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301084429] [2024-06-04 16:02:56,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:56,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:56,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:56,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:56,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:56,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 332 transitions, 4562 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:56,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:56,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:56,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:57,235 INFO L124 PetriNetUnfolderBase]: 1608/2712 cut-off events. [2024-06-04 16:02:57,235 INFO L125 PetriNetUnfolderBase]: For 123388/123400 co-relation queries the response was YES. [2024-06-04 16:02:57,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18449 conditions, 2712 events. 1608/2712 cut-off events. For 123388/123400 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15828 event pairs, 331 based on Foata normal form. 13/2725 useless extension candidates. Maximal degree in co-relation 18331. Up to 2301 conditions per place. [2024-06-04 16:02:57,264 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 238 selfloop transitions, 103 changer transitions 0/347 dead transitions. [2024-06-04 16:02:57,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 347 transitions, 5280 flow [2024-06-04 16:02:57,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-04 16:02:57,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-04 16:02:57,264 INFO L175 Difference]: Start difference. First operand has 271 places, 332 transitions, 4562 flow. Second operand 8 states and 172 transitions. [2024-06-04 16:02:57,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 347 transitions, 5280 flow [2024-06-04 16:02:57,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 347 transitions, 5040 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-04 16:02:57,786 INFO L231 Difference]: Finished difference. Result has 270 places, 332 transitions, 4538 flow [2024-06-04 16:02:57,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4322, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4538, PETRI_PLACES=270, PETRI_TRANSITIONS=332} [2024-06-04 16:02:57,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-04 16:02:57,787 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 332 transitions, 4538 flow [2024-06-04 16:02:57,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:57,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:57,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:57,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 16:02:57,787 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:57,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:57,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1405131816, now seen corresponding path program 11 times [2024-06-04 16:02:57,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:57,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148121470] [2024-06-04 16:02:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:57,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:58,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:58,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148121470] [2024-06-04 16:02:58,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148121470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:58,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:58,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:58,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565505937] [2024-06-04 16:02:58,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:58,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:58,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:58,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:58,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:58,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:58,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 332 transitions, 4538 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:58,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:58,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:58,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:58,673 INFO L124 PetriNetUnfolderBase]: 1605/2702 cut-off events. [2024-06-04 16:02:58,674 INFO L125 PetriNetUnfolderBase]: For 115779/115779 co-relation queries the response was YES. [2024-06-04 16:02:58,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18257 conditions, 2702 events. 1605/2702 cut-off events. For 115779/115779 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15653 event pairs, 321 based on Foata normal form. 1/2702 useless extension candidates. Maximal degree in co-relation 18140. Up to 2227 conditions per place. [2024-06-04 16:02:58,708 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 247 selfloop transitions, 106 changer transitions 0/359 dead transitions. [2024-06-04 16:02:58,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 359 transitions, 5312 flow [2024-06-04 16:02:58,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 16:02:58,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-04 16:02:58,709 INFO L175 Difference]: Start difference. First operand has 270 places, 332 transitions, 4538 flow. Second operand 8 states and 186 transitions. [2024-06-04 16:02:58,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 359 transitions, 5312 flow [2024-06-04 16:02:59,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 359 transitions, 5062 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:59,178 INFO L231 Difference]: Finished difference. Result has 271 places, 332 transitions, 4518 flow [2024-06-04 16:02:59,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4288, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4518, PETRI_PLACES=271, PETRI_TRANSITIONS=332} [2024-06-04 16:02:59,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-04 16:02:59,178 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 332 transitions, 4518 flow [2024-06-04 16:02:59,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:59,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:59,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:59,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 16:02:59,179 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:59,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:59,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1405132002, now seen corresponding path program 9 times [2024-06-04 16:02:59,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:59,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501632811] [2024-06-04 16:02:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:59,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:59,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:59,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501632811] [2024-06-04 16:02:59,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501632811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:59,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:59,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:59,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759422939] [2024-06-04 16:02:59,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:59,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:59,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:59,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:59,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:59,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:59,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 332 transitions, 4518 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:59,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:59,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:59,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:59,979 INFO L124 PetriNetUnfolderBase]: 1602/2698 cut-off events. [2024-06-04 16:02:59,979 INFO L125 PetriNetUnfolderBase]: For 114432/114432 co-relation queries the response was YES. [2024-06-04 16:02:59,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18209 conditions, 2698 events. 1602/2698 cut-off events. For 114432/114432 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15668 event pairs, 321 based on Foata normal form. 1/2698 useless extension candidates. Maximal degree in co-relation 18092. Up to 2268 conditions per place. [2024-06-04 16:03:00,006 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 234 selfloop transitions, 111 changer transitions 0/351 dead transitions. [2024-06-04 16:03:00,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 351 transitions, 5254 flow [2024-06-04 16:03:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-04 16:03:00,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-04 16:03:00,007 INFO L175 Difference]: Start difference. First operand has 271 places, 332 transitions, 4518 flow. Second operand 9 states and 193 transitions. [2024-06-04 16:03:00,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 351 transitions, 5254 flow [2024-06-04 16:03:00,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 351 transitions, 5000 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:00,345 INFO L231 Difference]: Finished difference. Result has 271 places, 332 transitions, 4500 flow [2024-06-04 16:03:00,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4264, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4500, PETRI_PLACES=271, PETRI_TRANSITIONS=332} [2024-06-04 16:03:00,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-04 16:03:00,345 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 332 transitions, 4500 flow [2024-06-04 16:03:00,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:00,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:00,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:00,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 16:03:00,345 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:00,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:00,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1282336186, now seen corresponding path program 7 times [2024-06-04 16:03:00,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:00,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912291861] [2024-06-04 16:03:00,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:00,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:00,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:00,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912291861] [2024-06-04 16:03:00,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912291861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:00,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:00,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:00,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428819686] [2024-06-04 16:03:00,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:00,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:00,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:00,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:00,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:00,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:00,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 332 transitions, 4500 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:00,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:00,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:00,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:01,223 INFO L124 PetriNetUnfolderBase]: 1607/2706 cut-off events. [2024-06-04 16:03:01,223 INFO L125 PetriNetUnfolderBase]: For 106923/106923 co-relation queries the response was YES. [2024-06-04 16:03:01,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18084 conditions, 2706 events. 1607/2706 cut-off events. For 106923/106923 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 15704 event pairs, 304 based on Foata normal form. 1/2707 useless extension candidates. Maximal degree in co-relation 17968. Up to 2225 conditions per place. [2024-06-04 16:03:01,248 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 228 selfloop transitions, 141 changer transitions 0/375 dead transitions. [2024-06-04 16:03:01,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 375 transitions, 5532 flow [2024-06-04 16:03:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:03:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:03:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 275 transitions. [2024-06-04 16:03:01,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159474671669794 [2024-06-04 16:03:01,249 INFO L175 Difference]: Start difference. First operand has 271 places, 332 transitions, 4500 flow. Second operand 13 states and 275 transitions. [2024-06-04 16:03:01,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 375 transitions, 5532 flow [2024-06-04 16:03:01,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 375 transitions, 5252 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-04 16:03:01,558 INFO L231 Difference]: Finished difference. Result has 273 places, 338 transitions, 4610 flow [2024-06-04 16:03:01,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4224, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4610, PETRI_PLACES=273, PETRI_TRANSITIONS=338} [2024-06-04 16:03:01,559 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-04 16:03:01,559 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 338 transitions, 4610 flow [2024-06-04 16:03:01,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:01,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:01,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:01,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 16:03:01,559 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:01,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:01,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2003692922, now seen corresponding path program 8 times [2024-06-04 16:03:01,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:01,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447810973] [2024-06-04 16:03:01,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:01,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:01,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:01,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447810973] [2024-06-04 16:03:01,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447810973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:01,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:01,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:01,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057744253] [2024-06-04 16:03:01,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:01,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:01,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:01,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:01,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:02,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:02,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 338 transitions, 4610 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:02,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:02,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:02,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:02,472 INFO L124 PetriNetUnfolderBase]: 1612/2721 cut-off events. [2024-06-04 16:03:02,472 INFO L125 PetriNetUnfolderBase]: For 105272/105278 co-relation queries the response was YES. [2024-06-04 16:03:02,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18335 conditions, 2721 events. 1612/2721 cut-off events. For 105272/105278 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15874 event pairs, 315 based on Foata normal form. 7/2728 useless extension candidates. Maximal degree in co-relation 18221. Up to 2390 conditions per place. [2024-06-04 16:03:02,500 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 299 selfloop transitions, 50 changer transitions 0/355 dead transitions. [2024-06-04 16:03:02,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 355 transitions, 5382 flow [2024-06-04 16:03:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:02,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:02,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-04 16:03:02,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-04 16:03:02,501 INFO L175 Difference]: Start difference. First operand has 273 places, 338 transitions, 4610 flow. Second operand 7 states and 152 transitions. [2024-06-04 16:03:02,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 355 transitions, 5382 flow [2024-06-04 16:03:02,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 355 transitions, 5118 flow, removed 55 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:02,825 INFO L231 Difference]: Finished difference. Result has 270 places, 341 transitions, 4506 flow [2024-06-04 16:03:02,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4350, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4506, PETRI_PLACES=270, PETRI_TRANSITIONS=341} [2024-06-04 16:03:02,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-04 16:03:02,825 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 341 transitions, 4506 flow [2024-06-04 16:03:02,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:02,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:02,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:02,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 16:03:02,826 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:02,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:02,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2003277212, now seen corresponding path program 9 times [2024-06-04 16:03:02,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:02,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198259136] [2024-06-04 16:03:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:02,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:03,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:03,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198259136] [2024-06-04 16:03:03,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198259136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:03,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:03,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:03,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730944715] [2024-06-04 16:03:03,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:03,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:03,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:03,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:03,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:03,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:03,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 341 transitions, 4506 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:03,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:03,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:03,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:03,651 INFO L124 PetriNetUnfolderBase]: 1625/2741 cut-off events. [2024-06-04 16:03:03,651 INFO L125 PetriNetUnfolderBase]: For 107881/107881 co-relation queries the response was YES. [2024-06-04 16:03:03,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18278 conditions, 2741 events. 1625/2741 cut-off events. For 107881/107881 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 16032 event pairs, 306 based on Foata normal form. 1/2742 useless extension candidates. Maximal degree in co-relation 18164. Up to 2346 conditions per place. [2024-06-04 16:03:03,677 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 269 selfloop transitions, 101 changer transitions 0/376 dead transitions. [2024-06-04 16:03:03,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 376 transitions, 5508 flow [2024-06-04 16:03:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-04 16:03:03,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-04 16:03:03,678 INFO L175 Difference]: Start difference. First operand has 270 places, 341 transitions, 4506 flow. Second operand 11 states and 236 transitions. [2024-06-04 16:03:03,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 376 transitions, 5508 flow [2024-06-04 16:03:03,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 376 transitions, 5408 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:03,964 INFO L231 Difference]: Finished difference. Result has 276 places, 347 transitions, 4700 flow [2024-06-04 16:03:03,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4406, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4700, PETRI_PLACES=276, PETRI_TRANSITIONS=347} [2024-06-04 16:03:03,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-04 16:03:03,965 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 347 transitions, 4700 flow [2024-06-04 16:03:03,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:03,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:03,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:03,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 16:03:03,966 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:03,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:03,966 INFO L85 PathProgramCache]: Analyzing trace with hash 207570136, now seen corresponding path program 10 times [2024-06-04 16:03:03,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:03,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58013011] [2024-06-04 16:03:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:03,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:04,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:04,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58013011] [2024-06-04 16:03:04,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58013011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:04,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:04,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:04,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926405635] [2024-06-04 16:03:04,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:04,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:04,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:04,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:04,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:04,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:04,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 347 transitions, 4700 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:04,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:04,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:04,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:04,826 INFO L124 PetriNetUnfolderBase]: 1630/2742 cut-off events. [2024-06-04 16:03:04,827 INFO L125 PetriNetUnfolderBase]: For 111506/111506 co-relation queries the response was YES. [2024-06-04 16:03:04,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18519 conditions, 2742 events. 1630/2742 cut-off events. For 111506/111506 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 15950 event pairs, 304 based on Foata normal form. 1/2743 useless extension candidates. Maximal degree in co-relation 18404. Up to 2352 conditions per place. [2024-06-04 16:03:04,856 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 269 selfloop transitions, 108 changer transitions 0/383 dead transitions. [2024-06-04 16:03:04,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 383 transitions, 5692 flow [2024-06-04 16:03:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:03:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:03:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 301 transitions. [2024-06-04 16:03:04,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894308943089431 [2024-06-04 16:03:04,858 INFO L175 Difference]: Start difference. First operand has 276 places, 347 transitions, 4700 flow. Second operand 15 states and 301 transitions. [2024-06-04 16:03:04,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 383 transitions, 5692 flow [2024-06-04 16:03:05,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 383 transitions, 5558 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:05,170 INFO L231 Difference]: Finished difference. Result has 284 places, 350 transitions, 4834 flow [2024-06-04 16:03:05,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4568, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4834, PETRI_PLACES=284, PETRI_TRANSITIONS=350} [2024-06-04 16:03:05,170 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-04 16:03:05,171 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 350 transitions, 4834 flow [2024-06-04 16:03:05,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:05,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:05,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:05,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 16:03:05,171 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:05,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1998152168, now seen corresponding path program 10 times [2024-06-04 16:03:05,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:05,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481293402] [2024-06-04 16:03:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:05,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:05,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:05,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481293402] [2024-06-04 16:03:05,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481293402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:05,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:05,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:05,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603859639] [2024-06-04 16:03:05,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:05,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:05,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:05,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:05,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:05,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:05,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 350 transitions, 4834 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:05,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:05,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:05,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:06,065 INFO L124 PetriNetUnfolderBase]: 1635/2751 cut-off events. [2024-06-04 16:03:06,065 INFO L125 PetriNetUnfolderBase]: For 115315/115315 co-relation queries the response was YES. [2024-06-04 16:03:06,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18825 conditions, 2751 events. 1635/2751 cut-off events. For 115315/115315 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 16031 event pairs, 304 based on Foata normal form. 1/2752 useless extension candidates. Maximal degree in co-relation 18708. Up to 2283 conditions per place. [2024-06-04 16:03:06,097 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 260 selfloop transitions, 120 changer transitions 0/386 dead transitions. [2024-06-04 16:03:06,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 386 transitions, 5898 flow [2024-06-04 16:03:06,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:06,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:06,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-04 16:03:06,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:03:06,098 INFO L175 Difference]: Start difference. First operand has 284 places, 350 transitions, 4834 flow. Second operand 12 states and 252 transitions. [2024-06-04 16:03:06,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 386 transitions, 5898 flow [2024-06-04 16:03:06,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 386 transitions, 5654 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-06-04 16:03:06,450 INFO L231 Difference]: Finished difference. Result has 284 places, 356 transitions, 4958 flow [2024-06-04 16:03:06,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4590, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4958, PETRI_PLACES=284, PETRI_TRANSITIONS=356} [2024-06-04 16:03:06,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-04 16:03:06,451 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 356 transitions, 4958 flow [2024-06-04 16:03:06,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:06,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:06,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:06,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 16:03:06,451 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:06,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:06,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1997914832, now seen corresponding path program 11 times [2024-06-04 16:03:06,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:06,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269133494] [2024-06-04 16:03:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:06,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:06,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:06,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269133494] [2024-06-04 16:03:06,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269133494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:06,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:06,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:06,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66552339] [2024-06-04 16:03:06,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:06,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:06,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:06,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:06,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:06,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:06,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 356 transitions, 4958 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:06,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:06,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:06,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:07,358 INFO L124 PetriNetUnfolderBase]: 1632/2751 cut-off events. [2024-06-04 16:03:07,358 INFO L125 PetriNetUnfolderBase]: For 118705/118705 co-relation queries the response was YES. [2024-06-04 16:03:07,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18999 conditions, 2751 events. 1632/2751 cut-off events. For 118705/118705 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 16084 event pairs, 306 based on Foata normal form. 1/2752 useless extension candidates. Maximal degree in co-relation 18881. Up to 2356 conditions per place. [2024-06-04 16:03:07,388 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 274 selfloop transitions, 107 changer transitions 0/387 dead transitions. [2024-06-04 16:03:07,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 387 transitions, 5800 flow [2024-06-04 16:03:07,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:03:07,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:03:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 284 transitions. [2024-06-04 16:03:07,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49477351916376305 [2024-06-04 16:03:07,389 INFO L175 Difference]: Start difference. First operand has 284 places, 356 transitions, 4958 flow. Second operand 14 states and 284 transitions. [2024-06-04 16:03:07,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 387 transitions, 5800 flow [2024-06-04 16:03:07,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 387 transitions, 5656 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:07,799 INFO L231 Difference]: Finished difference. Result has 292 places, 356 transitions, 5034 flow [2024-06-04 16:03:07,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4814, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5034, PETRI_PLACES=292, PETRI_TRANSITIONS=356} [2024-06-04 16:03:07,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-04 16:03:07,800 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 356 transitions, 5034 flow [2024-06-04 16:03:07,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:07,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:07,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:07,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 16:03:07,800 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:07,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:07,800 INFO L85 PathProgramCache]: Analyzing trace with hash 492375144, now seen corresponding path program 12 times [2024-06-04 16:03:07,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:07,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363463425] [2024-06-04 16:03:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:07,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:08,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:08,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363463425] [2024-06-04 16:03:08,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363463425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:08,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:08,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:08,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816759719] [2024-06-04 16:03:08,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:08,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:08,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:08,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:08,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:08,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:08,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 356 transitions, 5034 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:08,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:08,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:08,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:08,654 INFO L124 PetriNetUnfolderBase]: 1629/2749 cut-off events. [2024-06-04 16:03:08,655 INFO L125 PetriNetUnfolderBase]: For 119687/119693 co-relation queries the response was YES. [2024-06-04 16:03:08,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18942 conditions, 2749 events. 1629/2749 cut-off events. For 119687/119693 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 16091 event pairs, 315 based on Foata normal form. 7/2756 useless extension candidates. Maximal degree in co-relation 18822. Up to 2362 conditions per place. [2024-06-04 16:03:08,682 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 294 selfloop transitions, 72 changer transitions 0/372 dead transitions. [2024-06-04 16:03:08,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 372 transitions, 5806 flow [2024-06-04 16:03:08,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:03:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:03:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-04 16:03:08,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:03:08,683 INFO L175 Difference]: Start difference. First operand has 292 places, 356 transitions, 5034 flow. Second operand 6 states and 138 transitions. [2024-06-04 16:03:08,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 372 transitions, 5806 flow [2024-06-04 16:03:09,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 372 transitions, 5550 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-06-04 16:03:09,149 INFO L231 Difference]: Finished difference. Result has 284 places, 356 transitions, 4948 flow [2024-06-04 16:03:09,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4778, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4948, PETRI_PLACES=284, PETRI_TRANSITIONS=356} [2024-06-04 16:03:09,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-04 16:03:09,149 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 356 transitions, 4948 flow [2024-06-04 16:03:09,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:09,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:09,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:09,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 16:03:09,150 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:09,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:09,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1204219214, now seen corresponding path program 11 times [2024-06-04 16:03:09,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:09,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786081131] [2024-06-04 16:03:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:09,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:09,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:09,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786081131] [2024-06-04 16:03:09,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786081131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:09,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:09,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:09,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607938731] [2024-06-04 16:03:09,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:09,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:09,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:09,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:09,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:09,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:09,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 356 transitions, 4948 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:09,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:09,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:09,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:10,010 INFO L124 PetriNetUnfolderBase]: 1634/2756 cut-off events. [2024-06-04 16:03:10,010 INFO L125 PetriNetUnfolderBase]: For 123245/123245 co-relation queries the response was YES. [2024-06-04 16:03:10,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19012 conditions, 2756 events. 1634/2756 cut-off events. For 123245/123245 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 16104 event pairs, 305 based on Foata normal form. 1/2757 useless extension candidates. Maximal degree in co-relation 18891. Up to 2448 conditions per place. [2024-06-04 16:03:10,039 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 343 selfloop transitions, 30 changer transitions 0/379 dead transitions. [2024-06-04 16:03:10,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 379 transitions, 5806 flow [2024-06-04 16:03:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-04 16:03:10,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-04 16:03:10,040 INFO L175 Difference]: Start difference. First operand has 284 places, 356 transitions, 4948 flow. Second operand 9 states and 186 transitions. [2024-06-04 16:03:10,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 379 transitions, 5806 flow [2024-06-04 16:03:10,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 379 transitions, 5616 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:10,557 INFO L231 Difference]: Finished difference. Result has 287 places, 359 transitions, 4888 flow [2024-06-04 16:03:10,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4758, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4888, PETRI_PLACES=287, PETRI_TRANSITIONS=359} [2024-06-04 16:03:10,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-04 16:03:10,558 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 359 transitions, 4888 flow [2024-06-04 16:03:10,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:10,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:10,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:10,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 16:03:10,558 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:10,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:10,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1204214564, now seen corresponding path program 12 times [2024-06-04 16:03:10,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:10,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099709496] [2024-06-04 16:03:10,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:10,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:10,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:10,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099709496] [2024-06-04 16:03:10,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099709496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:10,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:10,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:10,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359392378] [2024-06-04 16:03:10,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:10,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:10,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:10,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:10,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:10,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:10,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 359 transitions, 4888 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:10,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:10,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:10,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:11,338 INFO L124 PetriNetUnfolderBase]: 1639/2762 cut-off events. [2024-06-04 16:03:11,338 INFO L125 PetriNetUnfolderBase]: For 120195/120197 co-relation queries the response was YES. [2024-06-04 16:03:11,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18892 conditions, 2762 events. 1639/2762 cut-off events. For 120195/120197 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 16140 event pairs, 309 based on Foata normal form. 3/2765 useless extension candidates. Maximal degree in co-relation 18771. Up to 2287 conditions per place. [2024-06-04 16:03:11,366 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 257 selfloop transitions, 120 changer transitions 0/383 dead transitions. [2024-06-04 16:03:11,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 383 transitions, 5876 flow [2024-06-04 16:03:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-04 16:03:11,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-04 16:03:11,367 INFO L175 Difference]: Start difference. First operand has 287 places, 359 transitions, 4888 flow. Second operand 9 states and 194 transitions. [2024-06-04 16:03:11,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 383 transitions, 5876 flow [2024-06-04 16:03:11,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 383 transitions, 5753 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:11,790 INFO L231 Difference]: Finished difference. Result has 289 places, 362 transitions, 5075 flow [2024-06-04 16:03:11,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5075, PETRI_PLACES=289, PETRI_TRANSITIONS=362} [2024-06-04 16:03:11,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-04 16:03:11,791 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 362 transitions, 5075 flow [2024-06-04 16:03:11,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:11,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:11,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:11,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 16:03:11,792 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:11,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:11,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1204214378, now seen corresponding path program 13 times [2024-06-04 16:03:11,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:11,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906962077] [2024-06-04 16:03:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:11,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:12,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:12,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906962077] [2024-06-04 16:03:12,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906962077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:12,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:12,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:12,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717877433] [2024-06-04 16:03:12,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:12,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:12,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:12,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:12,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:12,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:12,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 362 transitions, 5075 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:12,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:12,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:12,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:12,715 INFO L124 PetriNetUnfolderBase]: 1644/2769 cut-off events. [2024-06-04 16:03:12,715 INFO L125 PetriNetUnfolderBase]: For 124515/124517 co-relation queries the response was YES. [2024-06-04 16:03:12,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19142 conditions, 2769 events. 1644/2769 cut-off events. For 124515/124517 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 16191 event pairs, 309 based on Foata normal form. 3/2772 useless extension candidates. Maximal degree in co-relation 19021. Up to 2292 conditions per place. [2024-06-04 16:03:12,742 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 239 selfloop transitions, 147 changer transitions 0/392 dead transitions. [2024-06-04 16:03:12,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 392 transitions, 6079 flow [2024-06-04 16:03:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:12,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:12,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-04 16:03:12,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020325203252033 [2024-06-04 16:03:12,743 INFO L175 Difference]: Start difference. First operand has 289 places, 362 transitions, 5075 flow. Second operand 12 states and 247 transitions. [2024-06-04 16:03:12,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 392 transitions, 6079 flow [2024-06-04 16:03:13,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 392 transitions, 5810 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:13,218 INFO L231 Difference]: Finished difference. Result has 296 places, 365 transitions, 5152 flow [2024-06-04 16:03:13,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4806, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5152, PETRI_PLACES=296, PETRI_TRANSITIONS=365} [2024-06-04 16:03:13,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-04 16:03:13,219 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 365 transitions, 5152 flow [2024-06-04 16:03:13,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:13,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:13,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:13,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 16:03:13,219 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:13,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:13,219 INFO L85 PathProgramCache]: Analyzing trace with hash 492790854, now seen corresponding path program 14 times [2024-06-04 16:03:13,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:13,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275963809] [2024-06-04 16:03:13,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:13,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:13,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:13,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275963809] [2024-06-04 16:03:13,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275963809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:13,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:13,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:13,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6654466] [2024-06-04 16:03:13,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:13,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:13,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:13,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:13,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:13,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:13,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 365 transitions, 5152 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:13,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:13,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:13,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:14,056 INFO L124 PetriNetUnfolderBase]: 1649/2781 cut-off events. [2024-06-04 16:03:14,056 INFO L125 PetriNetUnfolderBase]: For 127702/127702 co-relation queries the response was YES. [2024-06-04 16:03:14,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19141 conditions, 2781 events. 1649/2781 cut-off events. For 127702/127702 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 16318 event pairs, 306 based on Foata normal form. 1/2782 useless extension candidates. Maximal degree in co-relation 19020. Up to 2298 conditions per place. [2024-06-04 16:03:14,084 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 247 selfloop transitions, 145 changer transitions 0/398 dead transitions. [2024-06-04 16:03:14,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 398 transitions, 6186 flow [2024-06-04 16:03:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:14,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:14,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-04 16:03:14,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-04 16:03:14,086 INFO L175 Difference]: Start difference. First operand has 296 places, 365 transitions, 5152 flow. Second operand 9 states and 204 transitions. [2024-06-04 16:03:14,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 398 transitions, 6186 flow [2024-06-04 16:03:14,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 398 transitions, 5780 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:14,520 INFO L231 Difference]: Finished difference. Result has 296 places, 368 transitions, 5098 flow [2024-06-04 16:03:14,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5098, PETRI_PLACES=296, PETRI_TRANSITIONS=368} [2024-06-04 16:03:14,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-04 16:03:14,521 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 368 transitions, 5098 flow [2024-06-04 16:03:14,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:14,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:14,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:14,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 16:03:14,521 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:14,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:14,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1027082858, now seen corresponding path program 15 times [2024-06-04 16:03:14,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:14,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863298320] [2024-06-04 16:03:14,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:14,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:14,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:14,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863298320] [2024-06-04 16:03:14,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863298320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:14,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:14,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:14,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467592569] [2024-06-04 16:03:14,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:14,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:14,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:14,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:14,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:14,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:14,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 368 transitions, 5098 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:14,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:14,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:14,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:15,493 INFO L124 PetriNetUnfolderBase]: 1662/2800 cut-off events. [2024-06-04 16:03:15,493 INFO L125 PetriNetUnfolderBase]: For 134248/134250 co-relation queries the response was YES. [2024-06-04 16:03:15,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19135 conditions, 2800 events. 1662/2800 cut-off events. For 134248/134250 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 16412 event pairs, 311 based on Foata normal form. 3/2803 useless extension candidates. Maximal degree in co-relation 19014. Up to 2313 conditions per place. [2024-06-04 16:03:15,524 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 154 changer transitions 0/404 dead transitions. [2024-06-04 16:03:15,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 404 transitions, 6288 flow [2024-06-04 16:03:15,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:03:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:03:15,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 282 transitions. [2024-06-04 16:03:15,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-04 16:03:15,525 INFO L175 Difference]: Start difference. First operand has 296 places, 368 transitions, 5098 flow. Second operand 14 states and 282 transitions. [2024-06-04 16:03:15,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 404 transitions, 6288 flow [2024-06-04 16:03:15,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 404 transitions, 6030 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:15,981 INFO L231 Difference]: Finished difference. Result has 301 places, 374 transitions, 5236 flow [2024-06-04 16:03:15,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4850, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5236, PETRI_PLACES=301, PETRI_TRANSITIONS=374} [2024-06-04 16:03:15,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-04 16:03:15,982 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 374 transitions, 5236 flow [2024-06-04 16:03:15,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:15,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:15,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:15,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 16:03:15,983 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:15,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:15,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1027083044, now seen corresponding path program 13 times [2024-06-04 16:03:15,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:15,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167244237] [2024-06-04 16:03:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:15,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:16,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:16,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167244237] [2024-06-04 16:03:16,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167244237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:16,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:16,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:16,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693246904] [2024-06-04 16:03:16,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:16,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:16,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:16,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:16,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:16,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:16,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 374 transitions, 5236 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:16,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:16,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:16,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:16,775 INFO L124 PetriNetUnfolderBase]: 1667/2807 cut-off events. [2024-06-04 16:03:16,775 INFO L125 PetriNetUnfolderBase]: For 134907/134909 co-relation queries the response was YES. [2024-06-04 16:03:16,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19222 conditions, 2807 events. 1667/2807 cut-off events. For 134907/134909 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 16464 event pairs, 309 based on Foata normal form. 3/2810 useless extension candidates. Maximal degree in co-relation 19101. Up to 2325 conditions per place. [2024-06-04 16:03:16,803 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 267 selfloop transitions, 126 changer transitions 0/399 dead transitions. [2024-06-04 16:03:16,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 399 transitions, 6255 flow [2024-06-04 16:03:16,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-04 16:03:16,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097560975609756 [2024-06-04 16:03:16,804 INFO L175 Difference]: Start difference. First operand has 301 places, 374 transitions, 5236 flow. Second operand 10 states and 209 transitions. [2024-06-04 16:03:16,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 399 transitions, 6255 flow [2024-06-04 16:03:17,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 399 transitions, 5990 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:17,278 INFO L231 Difference]: Finished difference. Result has 302 places, 377 transitions, 5284 flow [2024-06-04 16:03:17,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4971, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5284, PETRI_PLACES=302, PETRI_TRANSITIONS=377} [2024-06-04 16:03:17,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-04 16:03:17,280 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 377 transitions, 5284 flow [2024-06-04 16:03:17,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:17,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:17,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:17,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 16:03:17,280 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:17,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:17,281 INFO L85 PathProgramCache]: Analyzing trace with hash 497915898, now seen corresponding path program 14 times [2024-06-04 16:03:17,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:17,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254550081] [2024-06-04 16:03:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:17,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:17,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:17,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254550081] [2024-06-04 16:03:17,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254550081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:17,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:17,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:17,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39904666] [2024-06-04 16:03:17,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:17,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:17,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:17,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:17,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:17,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:17,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 377 transitions, 5284 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:17,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:17,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:17,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:18,235 INFO L124 PetriNetUnfolderBase]: 1664/2800 cut-off events. [2024-06-04 16:03:18,236 INFO L125 PetriNetUnfolderBase]: For 135950/135950 co-relation queries the response was YES. [2024-06-04 16:03:18,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19134 conditions, 2800 events. 1664/2800 cut-off events. For 135950/135950 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 16383 event pairs, 304 based on Foata normal form. 1/2801 useless extension candidates. Maximal degree in co-relation 19012. Up to 2322 conditions per place. [2024-06-04 16:03:18,269 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 130 changer transitions 0/404 dead transitions. [2024-06-04 16:03:18,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 404 transitions, 6152 flow [2024-06-04 16:03:18,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-04 16:03:18,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-04 16:03:18,270 INFO L175 Difference]: Start difference. First operand has 302 places, 377 transitions, 5284 flow. Second operand 10 states and 216 transitions. [2024-06-04 16:03:18,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 404 transitions, 6152 flow [2024-06-04 16:03:18,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 404 transitions, 5909 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:18,854 INFO L231 Difference]: Finished difference. Result has 305 places, 377 transitions, 5311 flow [2024-06-04 16:03:18,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5041, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5311, PETRI_PLACES=305, PETRI_TRANSITIONS=377} [2024-06-04 16:03:18,854 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-04 16:03:18,854 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 377 transitions, 5311 flow [2024-06-04 16:03:18,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:18,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:18,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:18,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 16:03:18,855 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:18,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:18,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1026845708, now seen corresponding path program 16 times [2024-06-04 16:03:18,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:18,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491631674] [2024-06-04 16:03:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:18,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:19,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:19,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491631674] [2024-06-04 16:03:19,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491631674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:19,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:19,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:19,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575660713] [2024-06-04 16:03:19,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:19,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:19,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:19,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:19,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:19,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:19,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 377 transitions, 5311 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:19,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:19,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:19,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:19,842 INFO L124 PetriNetUnfolderBase]: 1661/2801 cut-off events. [2024-06-04 16:03:19,842 INFO L125 PetriNetUnfolderBase]: For 138897/138899 co-relation queries the response was YES. [2024-06-04 16:03:19,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19115 conditions, 2801 events. 1661/2801 cut-off events. For 138897/138899 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 16440 event pairs, 311 based on Foata normal form. 3/2804 useless extension candidates. Maximal degree in co-relation 18992. Up to 2313 conditions per place. [2024-06-04 16:03:19,873 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 154 changer transitions 0/404 dead transitions. [2024-06-04 16:03:19,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 404 transitions, 6301 flow [2024-06-04 16:03:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:19,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-04 16:03:19,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020325203252033 [2024-06-04 16:03:19,874 INFO L175 Difference]: Start difference. First operand has 305 places, 377 transitions, 5311 flow. Second operand 12 states and 247 transitions. [2024-06-04 16:03:19,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 404 transitions, 6301 flow [2024-06-04 16:03:20,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 404 transitions, 6035 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:20,409 INFO L231 Difference]: Finished difference. Result has 308 places, 377 transitions, 5361 flow [2024-06-04 16:03:20,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5047, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5361, PETRI_PLACES=308, PETRI_TRANSITIONS=377} [2024-06-04 16:03:20,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-04 16:03:20,410 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 377 transitions, 5361 flow [2024-06-04 16:03:20,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:20,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:20,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:20,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 16:03:20,410 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:20,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:20,411 INFO L85 PathProgramCache]: Analyzing trace with hash 498153234, now seen corresponding path program 17 times [2024-06-04 16:03:20,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:20,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232129214] [2024-06-04 16:03:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:20,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:20,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:20,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232129214] [2024-06-04 16:03:20,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232129214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:20,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:20,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:20,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209216666] [2024-06-04 16:03:20,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:20,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:20,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:20,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:20,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:20,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:20,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 377 transitions, 5361 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:20,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:20,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:20,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:21,505 INFO L124 PetriNetUnfolderBase]: 1666/2809 cut-off events. [2024-06-04 16:03:21,506 INFO L125 PetriNetUnfolderBase]: For 138265/138265 co-relation queries the response was YES. [2024-06-04 16:03:21,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19212 conditions, 2809 events. 1666/2809 cut-off events. For 138265/138265 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 16442 event pairs, 306 based on Foata normal form. 1/2810 useless extension candidates. Maximal degree in co-relation 19089. Up to 2319 conditions per place. [2024-06-04 16:03:21,541 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 247 selfloop transitions, 160 changer transitions 0/413 dead transitions. [2024-06-04 16:03:21,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 413 transitions, 6430 flow [2024-06-04 16:03:21,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 256 transitions. [2024-06-04 16:03:21,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-04 16:03:21,543 INFO L175 Difference]: Start difference. First operand has 308 places, 377 transitions, 5361 flow. Second operand 12 states and 256 transitions. [2024-06-04 16:03:21,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 413 transitions, 6430 flow [2024-06-04 16:03:22,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 413 transitions, 6126 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:22,123 INFO L231 Difference]: Finished difference. Result has 310 places, 380 transitions, 5432 flow [2024-06-04 16:03:22,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5063, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5432, PETRI_PLACES=310, PETRI_TRANSITIONS=380} [2024-06-04 16:03:22,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-04 16:03:22,124 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 380 transitions, 5432 flow [2024-06-04 16:03:22,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:22,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:22,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:22,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 16:03:22,124 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:22,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:22,125 INFO L85 PathProgramCache]: Analyzing trace with hash 497916084, now seen corresponding path program 18 times [2024-06-04 16:03:22,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:22,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845513419] [2024-06-04 16:03:22,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:22,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:22,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:22,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845513419] [2024-06-04 16:03:22,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845513419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:22,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:22,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:22,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308357689] [2024-06-04 16:03:22,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:22,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:22,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:22,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:22,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:22,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:22,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 380 transitions, 5432 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:22,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:22,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:22,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:23,313 INFO L124 PetriNetUnfolderBase]: 1663/2805 cut-off events. [2024-06-04 16:03:23,313 INFO L125 PetriNetUnfolderBase]: For 140212/140212 co-relation queries the response was YES. [2024-06-04 16:03:23,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19214 conditions, 2805 events. 1663/2805 cut-off events. For 140212/140212 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 16464 event pairs, 306 based on Foata normal form. 1/2806 useless extension candidates. Maximal degree in co-relation 19089. Up to 2316 conditions per place. [2024-06-04 16:03:23,350 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 162 changer transitions 0/413 dead transitions. [2024-06-04 16:03:23,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 413 transitions, 6332 flow [2024-06-04 16:03:23,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:03:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:03:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 271 transitions. [2024-06-04 16:03:23,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084427767354597 [2024-06-04 16:03:23,351 INFO L175 Difference]: Start difference. First operand has 310 places, 380 transitions, 5432 flow. Second operand 13 states and 271 transitions. [2024-06-04 16:03:23,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 413 transitions, 6332 flow [2024-06-04 16:03:23,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 413 transitions, 5909 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-04 16:03:23,994 INFO L231 Difference]: Finished difference. Result has 312 places, 380 transitions, 5343 flow [2024-06-04 16:03:23,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5009, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5343, PETRI_PLACES=312, PETRI_TRANSITIONS=380} [2024-06-04 16:03:24,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-04 16:03:24,004 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 380 transitions, 5343 flow [2024-06-04 16:03:24,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:24,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:24,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:24,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 16:03:24,005 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:24,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:24,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1371040888, now seen corresponding path program 1 times [2024-06-04 16:03:24,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:24,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298085554] [2024-06-04 16:03:24,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:24,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:24,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:24,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298085554] [2024-06-04 16:03:24,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298085554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:24,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:24,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:24,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987507988] [2024-06-04 16:03:24,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:24,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:24,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:24,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:24,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:24,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:24,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 380 transitions, 5343 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:24,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:24,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:24,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:24,906 INFO L124 PetriNetUnfolderBase]: 1716/2891 cut-off events. [2024-06-04 16:03:24,907 INFO L125 PetriNetUnfolderBase]: For 161726/161726 co-relation queries the response was YES. [2024-06-04 16:03:24,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19960 conditions, 2891 events. 1716/2891 cut-off events. For 161726/161726 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 17050 event pairs, 317 based on Foata normal form. 6/2897 useless extension candidates. Maximal degree in co-relation 19835. Up to 2419 conditions per place. [2024-06-04 16:03:24,936 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 362 selfloop transitions, 51 changer transitions 0/419 dead transitions. [2024-06-04 16:03:24,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 419 transitions, 6495 flow [2024-06-04 16:03:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:24,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-04 16:03:24,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:03:24,936 INFO L175 Difference]: Start difference. First operand has 312 places, 380 transitions, 5343 flow. Second operand 8 states and 180 transitions. [2024-06-04 16:03:24,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 419 transitions, 6495 flow [2024-06-04 16:03:25,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 419 transitions, 6113 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-06-04 16:03:25,441 INFO L231 Difference]: Finished difference. Result has 308 places, 385 transitions, 5157 flow [2024-06-04 16:03:25,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4963, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5157, PETRI_PLACES=308, PETRI_TRANSITIONS=385} [2024-06-04 16:03:25,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-04 16:03:25,442 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 385 transitions, 5157 flow [2024-06-04 16:03:25,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:25,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:25,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:25,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 16:03:25,443 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:25,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:25,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1282475128, now seen corresponding path program 2 times [2024-06-04 16:03:25,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:25,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997715669] [2024-06-04 16:03:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:25,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:25,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:25,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997715669] [2024-06-04 16:03:25,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997715669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:25,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:25,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:25,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171787075] [2024-06-04 16:03:25,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:25,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:25,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:25,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:25,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:25,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:25,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 385 transitions, 5157 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:25,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:25,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:25,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:26,302 INFO L124 PetriNetUnfolderBase]: 1782/2998 cut-off events. [2024-06-04 16:03:26,302 INFO L125 PetriNetUnfolderBase]: For 178627/178627 co-relation queries the response was YES. [2024-06-04 16:03:26,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20947 conditions, 2998 events. 1782/2998 cut-off events. For 178627/178627 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 17777 event pairs, 335 based on Foata normal form. 6/3004 useless extension candidates. Maximal degree in co-relation 20820. Up to 2591 conditions per place. [2024-06-04 16:03:26,337 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 359 selfloop transitions, 50 changer transitions 0/415 dead transitions. [2024-06-04 16:03:26,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 415 transitions, 6250 flow [2024-06-04 16:03:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:26,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-04 16:03:26,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-04 16:03:26,338 INFO L175 Difference]: Start difference. First operand has 308 places, 385 transitions, 5157 flow. Second operand 8 states and 177 transitions. [2024-06-04 16:03:26,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 415 transitions, 6250 flow [2024-06-04 16:03:26,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 415 transitions, 6175 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:26,970 INFO L231 Difference]: Finished difference. Result has 314 places, 388 transitions, 5234 flow [2024-06-04 16:03:26,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5082, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5234, PETRI_PLACES=314, PETRI_TRANSITIONS=388} [2024-06-04 16:03:26,971 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-04 16:03:26,971 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 388 transitions, 5234 flow [2024-06-04 16:03:26,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:26,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:26,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:26,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 16:03:26,971 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:26,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:26,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1846818532, now seen corresponding path program 3 times [2024-06-04 16:03:26,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:26,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607009470] [2024-06-04 16:03:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:26,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:27,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:27,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607009470] [2024-06-04 16:03:27,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607009470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:27,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:27,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:27,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130767811] [2024-06-04 16:03:27,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:27,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:27,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:27,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:27,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:27,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:27,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 388 transitions, 5234 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:27,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:27,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:27,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:27,827 INFO L124 PetriNetUnfolderBase]: 1764/2972 cut-off events. [2024-06-04 16:03:27,827 INFO L125 PetriNetUnfolderBase]: For 171741/171741 co-relation queries the response was YES. [2024-06-04 16:03:27,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20510 conditions, 2972 events. 1764/2972 cut-off events. For 171741/171741 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 17587 event pairs, 333 based on Foata normal form. 8/2980 useless extension candidates. Maximal degree in co-relation 20380. Up to 2613 conditions per place. [2024-06-04 16:03:27,858 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 357 selfloop transitions, 49 changer transitions 0/412 dead transitions. [2024-06-04 16:03:27,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 412 transitions, 6154 flow [2024-06-04 16:03:27,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-04 16:03:27,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-04 16:03:27,861 INFO L175 Difference]: Start difference. First operand has 314 places, 388 transitions, 5234 flow. Second operand 8 states and 173 transitions. [2024-06-04 16:03:27,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 412 transitions, 6154 flow [2024-06-04 16:03:28,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 412 transitions, 6073 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:28,502 INFO L231 Difference]: Finished difference. Result has 318 places, 389 transitions, 5278 flow [2024-06-04 16:03:28,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5161, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5278, PETRI_PLACES=318, PETRI_TRANSITIONS=389} [2024-06-04 16:03:28,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-04 16:03:28,502 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 389 transitions, 5278 flow [2024-06-04 16:03:28,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:28,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:28,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:28,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 16:03:28,503 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:28,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:28,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1997905904, now seen corresponding path program 4 times [2024-06-04 16:03:28,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:28,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901153195] [2024-06-04 16:03:28,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:28,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:28,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:28,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901153195] [2024-06-04 16:03:28,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901153195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:28,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:28,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:28,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287945537] [2024-06-04 16:03:28,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:28,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:28,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:28,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:28,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:28,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:28,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 389 transitions, 5278 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:28,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:28,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:28,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:29,384 INFO L124 PetriNetUnfolderBase]: 1792/3016 cut-off events. [2024-06-04 16:03:29,384 INFO L125 PetriNetUnfolderBase]: For 176406/176406 co-relation queries the response was YES. [2024-06-04 16:03:29,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20870 conditions, 3016 events. 1792/3016 cut-off events. For 176406/176406 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 17921 event pairs, 337 based on Foata normal form. 8/3024 useless extension candidates. Maximal degree in co-relation 20738. Up to 2684 conditions per place. [2024-06-04 16:03:29,420 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 373 selfloop transitions, 33 changer transitions 0/412 dead transitions. [2024-06-04 16:03:29,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 412 transitions, 6193 flow [2024-06-04 16:03:29,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:29,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-04 16:03:29,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4926829268292683 [2024-06-04 16:03:29,422 INFO L175 Difference]: Start difference. First operand has 318 places, 389 transitions, 5278 flow. Second operand 10 states and 202 transitions. [2024-06-04 16:03:29,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 412 transitions, 6193 flow [2024-06-04 16:03:30,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 412 transitions, 6098 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:30,064 INFO L231 Difference]: Finished difference. Result has 322 places, 390 transitions, 5275 flow [2024-06-04 16:03:30,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5183, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5275, PETRI_PLACES=322, PETRI_TRANSITIONS=390} [2024-06-04 16:03:30,064 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-04 16:03:30,064 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 390 transitions, 5275 flow [2024-06-04 16:03:30,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:30,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:30,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:30,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 16:03:30,065 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:30,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:30,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1125877506, now seen corresponding path program 5 times [2024-06-04 16:03:30,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:30,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511835249] [2024-06-04 16:03:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:30,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:30,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:30,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511835249] [2024-06-04 16:03:30,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511835249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:30,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:30,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:30,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689535902] [2024-06-04 16:03:30,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:30,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:30,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:30,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:30,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:30,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:30,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 390 transitions, 5275 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:30,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:30,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:30,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:30,964 INFO L124 PetriNetUnfolderBase]: 1820/3064 cut-off events. [2024-06-04 16:03:30,964 INFO L125 PetriNetUnfolderBase]: For 182181/182181 co-relation queries the response was YES. [2024-06-04 16:03:30,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21268 conditions, 3064 events. 1820/3064 cut-off events. For 182181/182181 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 18289 event pairs, 343 based on Foata normal form. 8/3072 useless extension candidates. Maximal degree in co-relation 21135. Up to 2728 conditions per place. [2024-06-04 16:03:30,997 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 373 selfloop transitions, 32 changer transitions 0/411 dead transitions. [2024-06-04 16:03:30,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 411 transitions, 6186 flow [2024-06-04 16:03:30,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:30,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-04 16:03:30,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-04 16:03:30,998 INFO L175 Difference]: Start difference. First operand has 322 places, 390 transitions, 5275 flow. Second operand 8 states and 170 transitions. [2024-06-04 16:03:30,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 411 transitions, 6186 flow [2024-06-04 16:03:31,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 411 transitions, 6113 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:31,709 INFO L231 Difference]: Finished difference. Result has 322 places, 391 transitions, 5294 flow [2024-06-04 16:03:31,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5202, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5294, PETRI_PLACES=322, PETRI_TRANSITIONS=391} [2024-06-04 16:03:31,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-04 16:03:31,710 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 391 transitions, 5294 flow [2024-06-04 16:03:31,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:31,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:31,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:31,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 16:03:31,710 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:31,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:31,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1125729636, now seen corresponding path program 6 times [2024-06-04 16:03:31,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:31,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296410976] [2024-06-04 16:03:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:31,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:32,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:32,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296410976] [2024-06-04 16:03:32,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296410976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:32,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:32,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:32,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783891987] [2024-06-04 16:03:32,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:32,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:32,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:32,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:32,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:32,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:32,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 391 transitions, 5294 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:32,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:32,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:32,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:32,570 INFO L124 PetriNetUnfolderBase]: 1840/3096 cut-off events. [2024-06-04 16:03:32,570 INFO L125 PetriNetUnfolderBase]: For 183220/183220 co-relation queries the response was YES. [2024-06-04 16:03:32,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21540 conditions, 3096 events. 1840/3096 cut-off events. For 183220/183220 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 18451 event pairs, 341 based on Foata normal form. 6/3102 useless extension candidates. Maximal degree in co-relation 21406. Up to 2698 conditions per place. [2024-06-04 16:03:32,609 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 376 selfloop transitions, 35 changer transitions 0/417 dead transitions. [2024-06-04 16:03:32,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 417 transitions, 6269 flow [2024-06-04 16:03:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:32,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:32,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-04 16:03:32,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-04 16:03:32,610 INFO L175 Difference]: Start difference. First operand has 322 places, 391 transitions, 5294 flow. Second operand 8 states and 172 transitions. [2024-06-04 16:03:32,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 417 transitions, 6269 flow [2024-06-04 16:03:33,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 417 transitions, 6196 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:33,295 INFO L231 Difference]: Finished difference. Result has 325 places, 394 transitions, 5361 flow [2024-06-04 16:03:33,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5221, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5361, PETRI_PLACES=325, PETRI_TRANSITIONS=394} [2024-06-04 16:03:33,296 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-04 16:03:33,296 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 394 transitions, 5361 flow [2024-06-04 16:03:33,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:33,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:33,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:33,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 16:03:33,296 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:33,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:33,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1997690702, now seen corresponding path program 1 times [2024-06-04 16:03:33,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:33,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340987863] [2024-06-04 16:03:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:33,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:33,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:33,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340987863] [2024-06-04 16:03:33,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340987863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:33,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:33,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:33,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750756222] [2024-06-04 16:03:33,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:33,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:33,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:33,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:33,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:33,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:33,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 394 transitions, 5361 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:33,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:33,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:33,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:34,316 INFO L124 PetriNetUnfolderBase]: 1860/3132 cut-off events. [2024-06-04 16:03:34,317 INFO L125 PetriNetUnfolderBase]: For 188574/188574 co-relation queries the response was YES. [2024-06-04 16:03:34,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21825 conditions, 3132 events. 1860/3132 cut-off events. For 188574/188574 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 18729 event pairs, 347 based on Foata normal form. 6/3138 useless extension candidates. Maximal degree in co-relation 21689. Up to 2730 conditions per place. [2024-06-04 16:03:34,351 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 377 selfloop transitions, 37 changer transitions 0/420 dead transitions. [2024-06-04 16:03:34,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 420 transitions, 6309 flow [2024-06-04 16:03:34,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-04 16:03:34,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-04 16:03:34,352 INFO L175 Difference]: Start difference. First operand has 325 places, 394 transitions, 5361 flow. Second operand 10 states and 204 transitions. [2024-06-04 16:03:34,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 420 transitions, 6309 flow [2024-06-04 16:03:35,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 420 transitions, 6249 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:35,180 INFO L231 Difference]: Finished difference. Result has 331 places, 395 transitions, 5397 flow [2024-06-04 16:03:35,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5301, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5397, PETRI_PLACES=331, PETRI_TRANSITIONS=395} [2024-06-04 16:03:35,180 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-04 16:03:35,181 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 395 transitions, 5397 flow [2024-06-04 16:03:35,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:35,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:35,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:35,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 16:03:35,181 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:35,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:35,181 INFO L85 PathProgramCache]: Analyzing trace with hash 911350624, now seen corresponding path program 7 times [2024-06-04 16:03:35,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:35,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573023374] [2024-06-04 16:03:35,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:35,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:35,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:35,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573023374] [2024-06-04 16:03:35,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573023374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:35,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:35,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:35,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34299820] [2024-06-04 16:03:35,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:35,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:35,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:35,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:35,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:35,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 395 transitions, 5397 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:35,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:35,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:35,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:36,111 INFO L124 PetriNetUnfolderBase]: 1888/3177 cut-off events. [2024-06-04 16:03:36,111 INFO L125 PetriNetUnfolderBase]: For 200173/200175 co-relation queries the response was YES. [2024-06-04 16:03:36,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22275 conditions, 3177 events. 1888/3177 cut-off events. For 200173/200175 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 19098 event pairs, 362 based on Foata normal form. 10/3187 useless extension candidates. Maximal degree in co-relation 22137. Up to 2815 conditions per place. [2024-06-04 16:03:36,155 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 365 selfloop transitions, 46 changer transitions 0/417 dead transitions. [2024-06-04 16:03:36,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 417 transitions, 6326 flow [2024-06-04 16:03:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-04 16:03:36,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013550135501355 [2024-06-04 16:03:36,157 INFO L175 Difference]: Start difference. First operand has 331 places, 395 transitions, 5397 flow. Second operand 9 states and 185 transitions. [2024-06-04 16:03:36,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 417 transitions, 6326 flow [2024-06-04 16:03:37,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 417 transitions, 6242 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:37,078 INFO L231 Difference]: Finished difference. Result has 332 places, 396 transitions, 5437 flow [2024-06-04 16:03:37,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5437, PETRI_PLACES=332, PETRI_TRANSITIONS=396} [2024-06-04 16:03:37,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-04 16:03:37,079 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 396 transitions, 5437 flow [2024-06-04 16:03:37,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:37,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:37,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:37,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 16:03:37,080 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:37,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:37,081 INFO L85 PathProgramCache]: Analyzing trace with hash 717411214, now seen corresponding path program 8 times [2024-06-04 16:03:37,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:37,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515859651] [2024-06-04 16:03:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:37,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:37,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:37,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515859651] [2024-06-04 16:03:37,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515859651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:37,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:37,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:37,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721573915] [2024-06-04 16:03:37,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:37,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:37,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:37,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:37,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:37,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:37,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 396 transitions, 5437 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:37,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:37,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:37,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:38,054 INFO L124 PetriNetUnfolderBase]: 1916/3220 cut-off events. [2024-06-04 16:03:38,054 INFO L125 PetriNetUnfolderBase]: For 205553/205553 co-relation queries the response was YES. [2024-06-04 16:03:38,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22675 conditions, 3220 events. 1916/3220 cut-off events. For 205553/205553 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 19384 event pairs, 361 based on Foata normal form. 8/3228 useless extension candidates. Maximal degree in co-relation 22536. Up to 2827 conditions per place. [2024-06-04 16:03:38,091 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 367 selfloop transitions, 48 changer transitions 0/421 dead transitions. [2024-06-04 16:03:38,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 421 transitions, 6384 flow [2024-06-04 16:03:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:38,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-04 16:03:38,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-04 16:03:38,092 INFO L175 Difference]: Start difference. First operand has 332 places, 396 transitions, 5437 flow. Second operand 9 states and 190 transitions. [2024-06-04 16:03:38,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 421 transitions, 6384 flow [2024-06-04 16:03:38,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 421 transitions, 6279 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:38,848 INFO L231 Difference]: Finished difference. Result has 334 places, 397 transitions, 5465 flow [2024-06-04 16:03:38,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5465, PETRI_PLACES=334, PETRI_TRANSITIONS=397} [2024-06-04 16:03:38,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-04 16:03:38,849 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 397 transitions, 5465 flow [2024-06-04 16:03:38,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:38,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:38,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:38,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 16:03:38,849 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:38,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:38,849 INFO L85 PathProgramCache]: Analyzing trace with hash 712048834, now seen corresponding path program 9 times [2024-06-04 16:03:38,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:38,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328557885] [2024-06-04 16:03:38,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:38,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:39,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:39,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328557885] [2024-06-04 16:03:39,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328557885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:39,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:39,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:39,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386752249] [2024-06-04 16:03:39,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:39,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:39,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:39,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:39,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:39,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:39,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 397 transitions, 5465 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:39,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:39,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:39,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:39,723 INFO L124 PetriNetUnfolderBase]: 1931/3249 cut-off events. [2024-06-04 16:03:39,724 INFO L125 PetriNetUnfolderBase]: For 206386/206386 co-relation queries the response was YES. [2024-06-04 16:03:39,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22776 conditions, 3249 events. 1931/3249 cut-off events. For 206386/206386 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 19579 event pairs, 366 based on Foata normal form. 8/3257 useless extension candidates. Maximal degree in co-relation 22636. Up to 2852 conditions per place. [2024-06-04 16:03:39,762 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 368 selfloop transitions, 46 changer transitions 0/420 dead transitions. [2024-06-04 16:03:39,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 420 transitions, 6408 flow [2024-06-04 16:03:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:39,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-04 16:03:39,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-04 16:03:39,763 INFO L175 Difference]: Start difference. First operand has 334 places, 397 transitions, 5465 flow. Second operand 7 states and 156 transitions. [2024-06-04 16:03:39,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 420 transitions, 6408 flow [2024-06-04 16:03:40,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 420 transitions, 6304 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:40,575 INFO L231 Difference]: Finished difference. Result has 334 places, 398 transitions, 5492 flow [2024-06-04 16:03:40,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5361, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5492, PETRI_PLACES=334, PETRI_TRANSITIONS=398} [2024-06-04 16:03:40,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-04 16:03:40,576 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 398 transitions, 5492 flow [2024-06-04 16:03:40,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:40,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:40,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:40,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 16:03:40,577 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:40,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:40,577 INFO L85 PathProgramCache]: Analyzing trace with hash 492651912, now seen corresponding path program 10 times [2024-06-04 16:03:40,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:40,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270585073] [2024-06-04 16:03:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:40,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:40,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:40,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270585073] [2024-06-04 16:03:40,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270585073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:40,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:40,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:40,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011266102] [2024-06-04 16:03:40,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:40,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:40,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:40,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:40,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:40,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:40,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 398 transitions, 5492 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:40,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:40,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:40,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:41,498 INFO L124 PetriNetUnfolderBase]: 1918/3225 cut-off events. [2024-06-04 16:03:41,498 INFO L125 PetriNetUnfolderBase]: For 190227/190227 co-relation queries the response was YES. [2024-06-04 16:03:41,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22219 conditions, 3225 events. 1918/3225 cut-off events. For 190227/190227 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 19398 event pairs, 339 based on Foata normal form. 6/3231 useless extension candidates. Maximal degree in co-relation 22078. Up to 2659 conditions per place. [2024-06-04 16:03:41,536 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 368 selfloop transitions, 54 changer transitions 0/428 dead transitions. [2024-06-04 16:03:41,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 428 transitions, 6488 flow [2024-06-04 16:03:41,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:41,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:41,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-04 16:03:41,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-04 16:03:41,537 INFO L175 Difference]: Start difference. First operand has 334 places, 398 transitions, 5492 flow. Second operand 7 states and 162 transitions. [2024-06-04 16:03:41,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 428 transitions, 6488 flow [2024-06-04 16:03:42,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 428 transitions, 6370 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:42,286 INFO L231 Difference]: Finished difference. Result has 337 places, 400 transitions, 5551 flow [2024-06-04 16:03:42,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5382, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5551, PETRI_PLACES=337, PETRI_TRANSITIONS=400} [2024-06-04 16:03:42,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-04 16:03:42,286 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 400 transitions, 5551 flow [2024-06-04 16:03:42,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:42,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:42,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:42,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 16:03:42,287 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:42,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:42,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1026621578, now seen corresponding path program 2 times [2024-06-04 16:03:42,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:42,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70980856] [2024-06-04 16:03:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:42,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:42,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:42,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70980856] [2024-06-04 16:03:42,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70980856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:42,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:42,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:42,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562043693] [2024-06-04 16:03:42,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:42,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:42,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:42,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:42,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:42,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:42,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 400 transitions, 5551 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:42,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:42,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:42,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:43,194 INFO L124 PetriNetUnfolderBase]: 1938/3267 cut-off events. [2024-06-04 16:03:43,195 INFO L125 PetriNetUnfolderBase]: For 195189/195191 co-relation queries the response was YES. [2024-06-04 16:03:43,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22490 conditions, 3267 events. 1938/3267 cut-off events. For 195189/195191 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19765 event pairs, 364 based on Foata normal form. 8/3275 useless extension candidates. Maximal degree in co-relation 22347. Up to 2867 conditions per place. [2024-06-04 16:03:43,233 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 371 selfloop transitions, 49 changer transitions 0/426 dead transitions. [2024-06-04 16:03:43,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 426 transitions, 6513 flow [2024-06-04 16:03:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-04 16:03:43,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-04 16:03:43,234 INFO L175 Difference]: Start difference. First operand has 337 places, 400 transitions, 5551 flow. Second operand 10 states and 204 transitions. [2024-06-04 16:03:43,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 426 transitions, 6513 flow [2024-06-04 16:03:43,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 426 transitions, 6348 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:43,989 INFO L231 Difference]: Finished difference. Result has 340 places, 401 transitions, 5508 flow [2024-06-04 16:03:43,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5386, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5508, PETRI_PLACES=340, PETRI_TRANSITIONS=401} [2024-06-04 16:03:43,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-04 16:03:43,990 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 401 transitions, 5508 flow [2024-06-04 16:03:43,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:43,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:43,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:43,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 16:03:43,991 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:43,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:43,991 INFO L85 PathProgramCache]: Analyzing trace with hash -760924298, now seen corresponding path program 3 times [2024-06-04 16:03:43,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:43,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410682328] [2024-06-04 16:03:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:43,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:44,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:44,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410682328] [2024-06-04 16:03:44,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410682328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:44,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:44,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:44,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473023451] [2024-06-04 16:03:44,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:44,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:44,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:44,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:44,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:44,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:44,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 401 transitions, 5508 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:44,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:44,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:44,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:44,994 INFO L124 PetriNetUnfolderBase]: 1958/3295 cut-off events. [2024-06-04 16:03:44,994 INFO L125 PetriNetUnfolderBase]: For 194320/194322 co-relation queries the response was YES. [2024-06-04 16:03:45,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22405 conditions, 3295 events. 1958/3295 cut-off events. For 194320/194322 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 19916 event pairs, 360 based on Foata normal form. 8/3303 useless extension candidates. Maximal degree in co-relation 22263. Up to 2660 conditions per place. [2024-06-04 16:03:45,036 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 362 selfloop transitions, 60 changer transitions 0/428 dead transitions. [2024-06-04 16:03:45,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 428 transitions, 6624 flow [2024-06-04 16:03:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:45,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-04 16:03:45,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:03:45,037 INFO L175 Difference]: Start difference. First operand has 340 places, 401 transitions, 5508 flow. Second operand 9 states and 189 transitions. [2024-06-04 16:03:45,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 428 transitions, 6624 flow [2024-06-04 16:03:45,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 428 transitions, 6514 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:45,989 INFO L231 Difference]: Finished difference. Result has 341 places, 402 transitions, 5542 flow [2024-06-04 16:03:45,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5398, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5542, PETRI_PLACES=341, PETRI_TRANSITIONS=402} [2024-06-04 16:03:45,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-04 16:03:45,989 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 402 transitions, 5542 flow [2024-06-04 16:03:45,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:45,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:45,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:45,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 16:03:45,990 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:45,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:45,990 INFO L85 PathProgramCache]: Analyzing trace with hash 498377364, now seen corresponding path program 4 times [2024-06-04 16:03:45,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:45,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408099286] [2024-06-04 16:03:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:45,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:46,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:46,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408099286] [2024-06-04 16:03:46,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408099286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:46,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:46,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:46,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75920713] [2024-06-04 16:03:46,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:46,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:46,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:46,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:46,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:46,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:46,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 402 transitions, 5542 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:46,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:46,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:46,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:47,018 INFO L124 PetriNetUnfolderBase]: 1945/3275 cut-off events. [2024-06-04 16:03:47,019 INFO L125 PetriNetUnfolderBase]: For 181848/181848 co-relation queries the response was YES. [2024-06-04 16:03:47,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21964 conditions, 3275 events. 1945/3275 cut-off events. For 181848/181848 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 19777 event pairs, 352 based on Foata normal form. 6/3281 useless extension candidates. Maximal degree in co-relation 21821. Up to 2754 conditions per place. [2024-06-04 16:03:47,063 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 367 selfloop transitions, 56 changer transitions 0/429 dead transitions. [2024-06-04 16:03:47,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 429 transitions, 6498 flow [2024-06-04 16:03:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-04 16:03:47,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-04 16:03:47,064 INFO L175 Difference]: Start difference. First operand has 341 places, 402 transitions, 5542 flow. Second operand 9 states and 192 transitions. [2024-06-04 16:03:47,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 429 transitions, 6498 flow [2024-06-04 16:03:48,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 429 transitions, 6389 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:48,151 INFO L231 Difference]: Finished difference. Result has 344 places, 402 transitions, 5551 flow [2024-06-04 16:03:48,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5433, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5551, PETRI_PLACES=344, PETRI_TRANSITIONS=402} [2024-06-04 16:03:48,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-04 16:03:48,152 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 402 transitions, 5551 flow [2024-06-04 16:03:48,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:48,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:48,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:48,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 16:03:48,152 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:48,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:48,153 INFO L85 PathProgramCache]: Analyzing trace with hash -737770862, now seen corresponding path program 1 times [2024-06-04 16:03:48,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:48,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112518854] [2024-06-04 16:03:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:48,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:48,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:48,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112518854] [2024-06-04 16:03:48,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112518854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:48,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:48,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:03:48,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823306777] [2024-06-04 16:03:48,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:48,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:03:48,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:48,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:03:48,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:03:48,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:48,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 402 transitions, 5551 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:48,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:48,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:48,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:49,170 INFO L124 PetriNetUnfolderBase]: 2009/3387 cut-off events. [2024-06-04 16:03:49,170 INFO L125 PetriNetUnfolderBase]: For 176358/176358 co-relation queries the response was YES. [2024-06-04 16:03:49,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22772 conditions, 3387 events. 2009/3387 cut-off events. For 176358/176358 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 20675 event pairs, 380 based on Foata normal form. 1/3387 useless extension candidates. Maximal degree in co-relation 22628. Up to 2861 conditions per place. [2024-06-04 16:03:49,210 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 313 selfloop transitions, 135 changer transitions 0/454 dead transitions. [2024-06-04 16:03:49,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 454 transitions, 7120 flow [2024-06-04 16:03:49,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:49,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-04 16:03:49,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-04 16:03:49,211 INFO L175 Difference]: Start difference. First operand has 344 places, 402 transitions, 5551 flow. Second operand 8 states and 183 transitions. [2024-06-04 16:03:49,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 454 transitions, 7120 flow [2024-06-04 16:03:50,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 454 transitions, 6934 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:50,219 INFO L231 Difference]: Finished difference. Result has 345 places, 433 transitions, 6225 flow [2024-06-04 16:03:50,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5367, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6225, PETRI_PLACES=345, PETRI_TRANSITIONS=433} [2024-06-04 16:03:50,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-04 16:03:50,220 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 433 transitions, 6225 flow [2024-06-04 16:03:50,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:50,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:50,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:50,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 16:03:50,220 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:50,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:50,220 INFO L85 PathProgramCache]: Analyzing trace with hash -686402856, now seen corresponding path program 2 times [2024-06-04 16:03:50,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:50,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736921624] [2024-06-04 16:03:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:50,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:50,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:50,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736921624] [2024-06-04 16:03:50,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736921624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:50,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:50,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:50,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097990077] [2024-06-04 16:03:50,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:50,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:50,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:50,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:50,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:50,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:50,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 433 transitions, 6225 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:50,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:50,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:50,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:51,284 INFO L124 PetriNetUnfolderBase]: 2022/3409 cut-off events. [2024-06-04 16:03:51,284 INFO L125 PetriNetUnfolderBase]: For 181416/181416 co-relation queries the response was YES. [2024-06-04 16:03:51,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23365 conditions, 3409 events. 2022/3409 cut-off events. For 181416/181416 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 20836 event pairs, 380 based on Foata normal form. 1/3409 useless extension candidates. Maximal degree in co-relation 23219. Up to 2956 conditions per place. [2024-06-04 16:03:51,327 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 355 selfloop transitions, 97 changer transitions 0/458 dead transitions. [2024-06-04 16:03:51,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 458 transitions, 7468 flow [2024-06-04 16:03:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:51,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-04 16:03:51,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-04 16:03:51,328 INFO L175 Difference]: Start difference. First operand has 345 places, 433 transitions, 6225 flow. Second operand 10 states and 216 transitions. [2024-06-04 16:03:51,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 458 transitions, 7468 flow [2024-06-04 16:03:52,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 458 transitions, 7310 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:52,385 INFO L231 Difference]: Finished difference. Result has 352 places, 440 transitions, 6444 flow [2024-06-04 16:03:52,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6085, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6444, PETRI_PLACES=352, PETRI_TRANSITIONS=440} [2024-06-04 16:03:52,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-04 16:03:52,386 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 440 transitions, 6444 flow [2024-06-04 16:03:52,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:52,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:52,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:52,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 16:03:52,386 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:52,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:52,387 INFO L85 PathProgramCache]: Analyzing trace with hash -247206962, now seen corresponding path program 3 times [2024-06-04 16:03:52,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:52,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656612743] [2024-06-04 16:03:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:52,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:52,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:52,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656612743] [2024-06-04 16:03:52,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656612743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:52,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:52,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:52,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350522643] [2024-06-04 16:03:52,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:52,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:52,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:52,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:52,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:52,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:52,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 440 transitions, 6444 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:52,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:52,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:52,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:53,471 INFO L124 PetriNetUnfolderBase]: 2019/3405 cut-off events. [2024-06-04 16:03:53,472 INFO L125 PetriNetUnfolderBase]: For 178742/178742 co-relation queries the response was YES. [2024-06-04 16:03:53,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23421 conditions, 3405 events. 2019/3405 cut-off events. For 178742/178742 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 20825 event pairs, 380 based on Foata normal form. 1/3405 useless extension candidates. Maximal degree in co-relation 23272. Up to 2953 conditions per place. [2024-06-04 16:03:53,514 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 355 selfloop transitions, 94 changer transitions 0/455 dead transitions. [2024-06-04 16:03:53,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 455 transitions, 7378 flow [2024-06-04 16:03:53,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:53,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-04 16:03:53,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-04 16:03:53,515 INFO L175 Difference]: Start difference. First operand has 352 places, 440 transitions, 6444 flow. Second operand 8 states and 179 transitions. [2024-06-04 16:03:53,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 455 transitions, 7378 flow [2024-06-04 16:03:54,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 455 transitions, 7263 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:54,780 INFO L231 Difference]: Finished difference. Result has 356 places, 440 transitions, 6531 flow [2024-06-04 16:03:54,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6329, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6531, PETRI_PLACES=356, PETRI_TRANSITIONS=440} [2024-06-04 16:03:54,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-04 16:03:54,780 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 440 transitions, 6531 flow [2024-06-04 16:03:54,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:54,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:54,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:54,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 16:03:54,781 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:54,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:54,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1795217716, now seen corresponding path program 4 times [2024-06-04 16:03:54,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:54,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884674995] [2024-06-04 16:03:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:54,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:55,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:55,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884674995] [2024-06-04 16:03:55,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884674995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:55,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:55,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:55,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878593184] [2024-06-04 16:03:55,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:55,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:55,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:55,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:55,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:55,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:55,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 440 transitions, 6531 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:55,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:55,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:55,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:55,921 INFO L124 PetriNetUnfolderBase]: 2024/3414 cut-off events. [2024-06-04 16:03:55,921 INFO L125 PetriNetUnfolderBase]: For 182963/182963 co-relation queries the response was YES. [2024-06-04 16:03:55,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23706 conditions, 3414 events. 2024/3414 cut-off events. For 182963/182963 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 20859 event pairs, 380 based on Foata normal form. 1/3414 useless extension candidates. Maximal degree in co-relation 23555. Up to 2897 conditions per place. [2024-06-04 16:03:55,973 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 324 selfloop transitions, 132 changer transitions 0/462 dead transitions. [2024-06-04 16:03:55,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 462 transitions, 7715 flow [2024-06-04 16:03:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:03:55,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:03:55,974 INFO L175 Difference]: Start difference. First operand has 356 places, 440 transitions, 6531 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:03:55,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 462 transitions, 7715 flow [2024-06-04 16:03:57,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 462 transitions, 7527 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:57,222 INFO L231 Difference]: Finished difference. Result has 357 places, 444 transitions, 6779 flow [2024-06-04 16:03:57,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6343, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6779, PETRI_PLACES=357, PETRI_TRANSITIONS=444} [2024-06-04 16:03:57,223 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-04 16:03:57,223 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 444 transitions, 6779 flow [2024-06-04 16:03:57,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:57,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:57,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:57,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 16:03:57,223 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:57,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:57,223 INFO L85 PathProgramCache]: Analyzing trace with hash 769919996, now seen corresponding path program 5 times [2024-06-04 16:03:57,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:57,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510529198] [2024-06-04 16:03:57,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:57,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:57,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:57,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510529198] [2024-06-04 16:03:57,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510529198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:57,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:57,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:57,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887854305] [2024-06-04 16:03:57,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:57,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:57,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:57,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:57,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:57,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:57,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 444 transitions, 6779 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:57,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:57,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:57,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:58,360 INFO L124 PetriNetUnfolderBase]: 2029/3423 cut-off events. [2024-06-04 16:03:58,360 INFO L125 PetriNetUnfolderBase]: For 188185/188185 co-relation queries the response was YES. [2024-06-04 16:03:58,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24106 conditions, 3423 events. 2029/3423 cut-off events. For 188185/188185 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 20997 event pairs, 380 based on Foata normal form. 1/3423 useless extension candidates. Maximal degree in co-relation 23953. Up to 2903 conditions per place. [2024-06-04 16:03:58,396 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 141 changer transitions 0/467 dead transitions. [2024-06-04 16:03:58,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 467 transitions, 7971 flow [2024-06-04 16:03:58,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:58,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-04 16:03:58,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-04 16:03:58,397 INFO L175 Difference]: Start difference. First operand has 357 places, 444 transitions, 6779 flow. Second operand 9 states and 202 transitions. [2024-06-04 16:03:58,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 467 transitions, 7971 flow [2024-06-04 16:03:59,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 467 transitions, 7661 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:59,774 INFO L231 Difference]: Finished difference. Result has 359 places, 447 transitions, 6847 flow [2024-06-04 16:03:59,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6477, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6847, PETRI_PLACES=359, PETRI_TRANSITIONS=447} [2024-06-04 16:03:59,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-04 16:03:59,775 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 447 transitions, 6847 flow [2024-06-04 16:03:59,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:59,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:59,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:59,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 16:03:59,775 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:59,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:59,775 INFO L85 PathProgramCache]: Analyzing trace with hash 777271646, now seen corresponding path program 6 times [2024-06-04 16:03:59,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:59,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697419072] [2024-06-04 16:03:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:59,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:00,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:00,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697419072] [2024-06-04 16:04:00,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697419072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:00,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:00,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:00,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466795565] [2024-06-04 16:04:00,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:00,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:00,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:00,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:00,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:00,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:00,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 447 transitions, 6847 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:00,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:00,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:00,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:00,953 INFO L124 PetriNetUnfolderBase]: 2026/3419 cut-off events. [2024-06-04 16:04:00,953 INFO L125 PetriNetUnfolderBase]: For 184949/184949 co-relation queries the response was YES. [2024-06-04 16:04:00,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23995 conditions, 3419 events. 2026/3419 cut-off events. For 184949/184949 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 20935 event pairs, 380 based on Foata normal form. 1/3419 useless extension candidates. Maximal degree in co-relation 23842. Up to 2900 conditions per place. [2024-06-04 16:04:01,005 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 141 changer transitions 0/467 dead transitions. [2024-06-04 16:04:01,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 467 transitions, 7817 flow [2024-06-04 16:04:01,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:04:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:04:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-04 16:04:01,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-04 16:04:01,006 INFO L175 Difference]: Start difference. First operand has 359 places, 447 transitions, 6847 flow. Second operand 10 states and 218 transitions. [2024-06-04 16:04:01,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 467 transitions, 7817 flow [2024-06-04 16:04:02,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 467 transitions, 7477 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-04 16:04:02,494 INFO L231 Difference]: Finished difference. Result has 361 places, 447 transitions, 6803 flow [2024-06-04 16:04:02,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6507, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6803, PETRI_PLACES=361, PETRI_TRANSITIONS=447} [2024-06-04 16:04:02,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-04 16:04:02,495 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 447 transitions, 6803 flow [2024-06-04 16:04:02,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:02,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:02,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:02,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 16:04:02,495 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:02,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:02,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1147183470, now seen corresponding path program 7 times [2024-06-04 16:04:02,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:02,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245890439] [2024-06-04 16:04:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:02,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:02,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:02,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245890439] [2024-06-04 16:04:02,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245890439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:02,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:02,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:02,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078541229] [2024-06-04 16:04:02,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:02,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:02,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:02,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:02,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:02,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:02,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 447 transitions, 6803 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:02,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:02,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:02,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:03,515 INFO L124 PetriNetUnfolderBase]: 2047/3454 cut-off events. [2024-06-04 16:04:03,515 INFO L125 PetriNetUnfolderBase]: For 191319/191319 co-relation queries the response was YES. [2024-06-04 16:04:03,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24377 conditions, 3454 events. 2047/3454 cut-off events. For 191319/191319 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 21208 event pairs, 380 based on Foata normal form. 1/3454 useless extension candidates. Maximal degree in co-relation 24224. Up to 2660 conditions per place. [2024-06-04 16:04:03,563 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 249 changer transitions 0/483 dead transitions. [2024-06-04 16:04:03,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 483 transitions, 8303 flow [2024-06-04 16:04:03,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:04:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:04:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-04 16:04:03,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-04 16:04:03,564 INFO L175 Difference]: Start difference. First operand has 361 places, 447 transitions, 6803 flow. Second operand 12 states and 254 transitions. [2024-06-04 16:04:03,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 483 transitions, 8303 flow [2024-06-04 16:04:04,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 483 transitions, 7960 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-04 16:04:04,941 INFO L231 Difference]: Finished difference. Result has 364 places, 456 transitions, 7148 flow [2024-06-04 16:04:04,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6464, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7148, PETRI_PLACES=364, PETRI_TRANSITIONS=456} [2024-06-04 16:04:04,941 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-04 16:04:04,941 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 456 transitions, 7148 flow [2024-06-04 16:04:04,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:04,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:04,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:04,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 16:04:04,942 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:04,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:04,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1711293496, now seen corresponding path program 8 times [2024-06-04 16:04:04,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:04,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164978916] [2024-06-04 16:04:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:04,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:05,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:05,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164978916] [2024-06-04 16:04:05,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164978916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:05,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:05,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:05,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416131493] [2024-06-04 16:04:05,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:05,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:05,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:05,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:05,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:05,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:05,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 456 transitions, 7148 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:05,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:05,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:05,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:05,926 INFO L124 PetriNetUnfolderBase]: 2052/3463 cut-off events. [2024-06-04 16:04:05,926 INFO L125 PetriNetUnfolderBase]: For 194214/194214 co-relation queries the response was YES. [2024-06-04 16:04:05,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24969 conditions, 3463 events. 2052/3463 cut-off events. For 194214/194214 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 21279 event pairs, 380 based on Foata normal form. 1/3463 useless extension candidates. Maximal degree in co-relation 24816. Up to 2666 conditions per place. [2024-06-04 16:04:05,978 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 216 selfloop transitions, 264 changer transitions 0/486 dead transitions. [2024-06-04 16:04:05,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 486 transitions, 8544 flow [2024-06-04 16:04:05,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:04:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:04:05,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-04 16:04:05,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-04 16:04:05,979 INFO L175 Difference]: Start difference. First operand has 364 places, 456 transitions, 7148 flow. Second operand 12 states and 254 transitions. [2024-06-04 16:04:05,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 486 transitions, 8544 flow [2024-06-04 16:04:07,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 486 transitions, 8009 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-04 16:04:07,663 INFO L231 Difference]: Finished difference. Result has 368 places, 459 transitions, 7211 flow [2024-06-04 16:04:07,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6641, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7211, PETRI_PLACES=368, PETRI_TRANSITIONS=459} [2024-06-04 16:04:07,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-04 16:04:07,664 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 459 transitions, 7211 flow [2024-06-04 16:04:07,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:07,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:07,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:07,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 16:04:07,664 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:07,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:07,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1143458820, now seen corresponding path program 9 times [2024-06-04 16:04:07,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:07,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275014679] [2024-06-04 16:04:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:07,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:07,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:07,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275014679] [2024-06-04 16:04:07,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275014679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:07,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:07,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:07,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645254883] [2024-06-04 16:04:07,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:07,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:07,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:07,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:07,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:08,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:08,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 459 transitions, 7211 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:08,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:08,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:08,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:08,770 INFO L124 PetriNetUnfolderBase]: 2065/3485 cut-off events. [2024-06-04 16:04:08,771 INFO L125 PetriNetUnfolderBase]: For 198691/198691 co-relation queries the response was YES. [2024-06-04 16:04:08,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24945 conditions, 3485 events. 2065/3485 cut-off events. For 198691/198691 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 21466 event pairs, 380 based on Foata normal form. 1/3485 useless extension candidates. Maximal degree in co-relation 24791. Up to 2962 conditions per place. [2024-06-04 16:04:08,839 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 362 selfloop transitions, 121 changer transitions 0/489 dead transitions. [2024-06-04 16:04:08,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 489 transitions, 8465 flow [2024-06-04 16:04:08,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:04:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:04:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 262 transitions. [2024-06-04 16:04:08,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4915572232645403 [2024-06-04 16:04:08,840 INFO L175 Difference]: Start difference. First operand has 368 places, 459 transitions, 7211 flow. Second operand 13 states and 262 transitions. [2024-06-04 16:04:08,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 489 transitions, 8465 flow [2024-06-04 16:04:10,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 489 transitions, 7871 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-04 16:04:10,478 INFO L231 Difference]: Finished difference. Result has 371 places, 465 transitions, 6947 flow [2024-06-04 16:04:10,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6629, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6947, PETRI_PLACES=371, PETRI_TRANSITIONS=465} [2024-06-04 16:04:10,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-04 16:04:10,479 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 465 transitions, 6947 flow [2024-06-04 16:04:10,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:10,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:10,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:10,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 16:04:10,479 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:10,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:10,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1143464400, now seen corresponding path program 10 times [2024-06-04 16:04:10,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:10,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615400906] [2024-06-04 16:04:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:10,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:10,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:10,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615400906] [2024-06-04 16:04:10,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615400906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:10,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:10,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:10,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853169819] [2024-06-04 16:04:10,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:10,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:10,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:10,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:10,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:10,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:10,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 465 transitions, 6947 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:10,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:10,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:10,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:11,519 INFO L124 PetriNetUnfolderBase]: 2062/3481 cut-off events. [2024-06-04 16:04:11,519 INFO L125 PetriNetUnfolderBase]: For 198727/198727 co-relation queries the response was YES. [2024-06-04 16:04:11,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24531 conditions, 3481 events. 2062/3481 cut-off events. For 198727/198727 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 21427 event pairs, 380 based on Foata normal form. 1/3481 useless extension candidates. Maximal degree in co-relation 24376. Up to 2959 conditions per place. [2024-06-04 16:04:11,564 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 360 selfloop transitions, 121 changer transitions 0/487 dead transitions. [2024-06-04 16:04:11,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 487 transitions, 7961 flow [2024-06-04 16:04:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:04:11,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:04:11,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 245 transitions. [2024-06-04 16:04:11,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49796747967479676 [2024-06-04 16:04:11,565 INFO L175 Difference]: Start difference. First operand has 371 places, 465 transitions, 6947 flow. Second operand 12 states and 245 transitions. [2024-06-04 16:04:11,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 487 transitions, 7961 flow [2024-06-04 16:04:13,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 487 transitions, 7770 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-04 16:04:13,117 INFO L231 Difference]: Finished difference. Result has 374 places, 465 transitions, 7004 flow [2024-06-04 16:04:13,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6756, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7004, PETRI_PLACES=374, PETRI_TRANSITIONS=465} [2024-06-04 16:04:13,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-04 16:04:13,117 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 465 transitions, 7004 flow [2024-06-04 16:04:13,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:13,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:13,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:13,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 16:04:13,118 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:13,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:13,118 INFO L85 PathProgramCache]: Analyzing trace with hash -971695260, now seen corresponding path program 11 times [2024-06-04 16:04:13,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:13,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767318167] [2024-06-04 16:04:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:13,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:13,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:13,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767318167] [2024-06-04 16:04:13,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767318167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:13,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:13,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:13,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767101465] [2024-06-04 16:04:13,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:13,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:13,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:13,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:13,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:13,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:13,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 465 transitions, 7004 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:13,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:13,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:13,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:14,144 INFO L124 PetriNetUnfolderBase]: 2075/3503 cut-off events. [2024-06-04 16:04:14,144 INFO L125 PetriNetUnfolderBase]: For 206148/206148 co-relation queries the response was YES. [2024-06-04 16:04:14,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24934 conditions, 3503 events. 2075/3503 cut-off events. For 206148/206148 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 21595 event pairs, 380 based on Foata normal form. 1/3503 useless extension candidates. Maximal degree in co-relation 24777. Up to 2693 conditions per place. [2024-06-04 16:04:14,190 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 262 changer transitions 0/496 dead transitions. [2024-06-04 16:04:14,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 496 transitions, 8426 flow [2024-06-04 16:04:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:04:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:04:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 271 transitions. [2024-06-04 16:04:14,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084427767354597 [2024-06-04 16:04:14,191 INFO L175 Difference]: Start difference. First operand has 374 places, 465 transitions, 7004 flow. Second operand 13 states and 271 transitions. [2024-06-04 16:04:14,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 496 transitions, 8426 flow [2024-06-04 16:04:15,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 496 transitions, 8184 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-04 16:04:15,804 INFO L231 Difference]: Finished difference. Result has 376 places, 471 transitions, 7356 flow [2024-06-04 16:04:15,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6762, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7356, PETRI_PLACES=376, PETRI_TRANSITIONS=471} [2024-06-04 16:04:15,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-04 16:04:15,805 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 471 transitions, 7356 flow [2024-06-04 16:04:15,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:15,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:15,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:15,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 16:04:15,806 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:15,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:15,806 INFO L85 PathProgramCache]: Analyzing trace with hash -971684100, now seen corresponding path program 12 times [2024-06-04 16:04:15,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:15,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031496138] [2024-06-04 16:04:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:15,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:16,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:16,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031496138] [2024-06-04 16:04:16,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031496138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:16,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:16,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:16,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122618682] [2024-06-04 16:04:16,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:16,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:16,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:16,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:16,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:16,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:16,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 471 transitions, 7356 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:16,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:16,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:16,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:16,818 INFO L124 PetriNetUnfolderBase]: 2072/3499 cut-off events. [2024-06-04 16:04:16,818 INFO L125 PetriNetUnfolderBase]: For 208569/208569 co-relation queries the response was YES. [2024-06-04 16:04:16,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25207 conditions, 3499 events. 2072/3499 cut-off events. For 208569/208569 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 21589 event pairs, 380 based on Foata normal form. 1/3499 useless extension candidates. Maximal degree in co-relation 25049. Up to 2690 conditions per place. [2024-06-04 16:04:16,868 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 227 selfloop transitions, 260 changer transitions 0/493 dead transitions. [2024-06-04 16:04:16,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 493 transitions, 8544 flow [2024-06-04 16:04:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:04:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:04:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-04 16:04:16,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-04 16:04:16,870 INFO L175 Difference]: Start difference. First operand has 376 places, 471 transitions, 7356 flow. Second operand 11 states and 236 transitions. [2024-06-04 16:04:16,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 493 transitions, 8544 flow [2024-06-04 16:04:18,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 493 transitions, 8085 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-04 16:04:18,403 INFO L231 Difference]: Finished difference. Result has 378 places, 471 transitions, 7424 flow [2024-06-04 16:04:18,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6897, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7424, PETRI_PLACES=378, PETRI_TRANSITIONS=471} [2024-06-04 16:04:18,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-04 16:04:18,404 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 471 transitions, 7424 flow [2024-06-04 16:04:18,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:18,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:18,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:18,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 16:04:18,404 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:18,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:18,405 INFO L85 PathProgramCache]: Analyzing trace with hash -856212789, now seen corresponding path program 1 times [2024-06-04 16:04:18,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:18,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89784288] [2024-06-04 16:04:18,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:18,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:18,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:18,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89784288] [2024-06-04 16:04:18,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89784288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:18,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:18,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:18,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693103937] [2024-06-04 16:04:18,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:18,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:18,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:18,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:18,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:18,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:18,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 471 transitions, 7424 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:18,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:18,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:18,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:19,473 INFO L124 PetriNetUnfolderBase]: 2080/3512 cut-off events. [2024-06-04 16:04:19,474 INFO L125 PetriNetUnfolderBase]: For 217021/217027 co-relation queries the response was YES. [2024-06-04 16:04:19,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25384 conditions, 3512 events. 2080/3512 cut-off events. For 217021/217027 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 21665 event pairs, 370 based on Foata normal form. 8/3520 useless extension candidates. Maximal degree in co-relation 25225. Up to 3078 conditions per place. [2024-06-04 16:04:19,515 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 417 selfloop transitions, 67 changer transitions 0/490 dead transitions. [2024-06-04 16:04:19,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 490 transitions, 8468 flow [2024-06-04 16:04:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:19,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:19,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-04 16:04:19,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-04 16:04:19,516 INFO L175 Difference]: Start difference. First operand has 378 places, 471 transitions, 7424 flow. Second operand 9 states and 188 transitions. [2024-06-04 16:04:19,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 490 transitions, 8468 flow [2024-06-04 16:04:21,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 490 transitions, 7948 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-04 16:04:21,030 INFO L231 Difference]: Finished difference. Result has 377 places, 473 transitions, 7087 flow [2024-06-04 16:04:21,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6904, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7087, PETRI_PLACES=377, PETRI_TRANSITIONS=473} [2024-06-04 16:04:21,030 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-04 16:04:21,030 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 473 transitions, 7087 flow [2024-06-04 16:04:21,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:21,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:21,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:21,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 16:04:21,031 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:21,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:21,031 INFO L85 PathProgramCache]: Analyzing trace with hash -856219950, now seen corresponding path program 13 times [2024-06-04 16:04:21,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:21,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797294829] [2024-06-04 16:04:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:21,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:21,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:21,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797294829] [2024-06-04 16:04:21,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797294829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:21,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:21,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:21,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457130373] [2024-06-04 16:04:21,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:21,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:21,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:21,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:21,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:21,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:21,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 473 transitions, 7087 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:21,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:21,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:21,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:22,147 INFO L124 PetriNetUnfolderBase]: 2114/3568 cut-off events. [2024-06-04 16:04:22,147 INFO L125 PetriNetUnfolderBase]: For 227614/227614 co-relation queries the response was YES. [2024-06-04 16:04:22,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25644 conditions, 3568 events. 2114/3568 cut-off events. For 227614/227614 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 22099 event pairs, 380 based on Foata normal form. 1/3568 useless extension candidates. Maximal degree in co-relation 25484. Up to 2965 conditions per place. [2024-06-04 16:04:22,197 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 339 selfloop transitions, 164 changer transitions 0/509 dead transitions. [2024-06-04 16:04:22,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 509 transitions, 8650 flow [2024-06-04 16:04:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:04:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:04:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-04 16:04:22,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:04:22,198 INFO L175 Difference]: Start difference. First operand has 377 places, 473 transitions, 7087 flow. Second operand 12 states and 252 transitions. [2024-06-04 16:04:22,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 509 transitions, 8650 flow [2024-06-04 16:04:23,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 509 transitions, 8513 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:23,655 INFO L231 Difference]: Finished difference. Result has 384 places, 488 transitions, 7505 flow [2024-06-04 16:04:23,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6950, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7505, PETRI_PLACES=384, PETRI_TRANSITIONS=488} [2024-06-04 16:04:23,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-04 16:04:23,655 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 488 transitions, 7505 flow [2024-06-04 16:04:23,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:23,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:23,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:23,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 16:04:23,656 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:23,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:23,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1586569336, now seen corresponding path program 14 times [2024-06-04 16:04:23,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:23,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245753170] [2024-06-04 16:04:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:23,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:23,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:23,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245753170] [2024-06-04 16:04:23,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245753170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:23,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:23,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:23,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392973090] [2024-06-04 16:04:23,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:23,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:23,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:23,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:23,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:24,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:24,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 488 transitions, 7505 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:24,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:24,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:24,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:24,707 INFO L124 PetriNetUnfolderBase]: 2127/3590 cut-off events. [2024-06-04 16:04:24,707 INFO L125 PetriNetUnfolderBase]: For 237150/237150 co-relation queries the response was YES. [2024-06-04 16:04:24,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26142 conditions, 3590 events. 2127/3590 cut-off events. For 237150/237150 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 22277 event pairs, 380 based on Foata normal form. 1/3590 useless extension candidates. Maximal degree in co-relation 25980. Up to 2980 conditions per place. [2024-06-04 16:04:24,753 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 336 selfloop transitions, 174 changer transitions 0/516 dead transitions. [2024-06-04 16:04:24,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 516 transitions, 8999 flow [2024-06-04 16:04:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:04:24,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:04:24,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 267 transitions. [2024-06-04 16:04:24,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50093808630394 [2024-06-04 16:04:24,754 INFO L175 Difference]: Start difference. First operand has 384 places, 488 transitions, 7505 flow. Second operand 13 states and 267 transitions. [2024-06-04 16:04:24,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 516 transitions, 8999 flow [2024-06-04 16:04:26,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 516 transitions, 8840 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:26,677 INFO L231 Difference]: Finished difference. Result has 391 places, 494 transitions, 7788 flow [2024-06-04 16:04:26,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7346, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7788, PETRI_PLACES=391, PETRI_TRANSITIONS=494} [2024-06-04 16:04:26,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-04 16:04:26,677 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 494 transitions, 7788 flow [2024-06-04 16:04:26,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:26,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:26,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:26,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 16:04:26,678 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:26,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:26,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1586747896, now seen corresponding path program 15 times [2024-06-04 16:04:26,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:26,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125040239] [2024-06-04 16:04:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:26,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:26,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:26,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125040239] [2024-06-04 16:04:26,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125040239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:26,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:26,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:26,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496232297] [2024-06-04 16:04:26,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:26,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:26,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:26,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:26,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:27,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:27,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 494 transitions, 7788 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:27,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:27,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:27,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:27,879 INFO L124 PetriNetUnfolderBase]: 2124/3586 cut-off events. [2024-06-04 16:04:27,879 INFO L125 PetriNetUnfolderBase]: For 238687/238687 co-relation queries the response was YES. [2024-06-04 16:04:27,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26397 conditions, 3586 events. 2124/3586 cut-off events. For 238687/238687 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 22237 event pairs, 380 based on Foata normal form. 1/3586 useless extension candidates. Maximal degree in co-relation 26233. Up to 2977 conditions per place. [2024-06-04 16:04:27,931 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 340 selfloop transitions, 168 changer transitions 0/514 dead transitions. [2024-06-04 16:04:27,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 514 transitions, 9190 flow [2024-06-04 16:04:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:04:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:04:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-04 16:04:27,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516629711751663 [2024-06-04 16:04:27,932 INFO L175 Difference]: Start difference. First operand has 391 places, 494 transitions, 7788 flow. Second operand 11 states and 233 transitions. [2024-06-04 16:04:27,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 514 transitions, 9190 flow [2024-06-04 16:04:29,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 514 transitions, 8882 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-04 16:04:29,577 INFO L231 Difference]: Finished difference. Result has 393 places, 494 transitions, 7822 flow [2024-06-04 16:04:29,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7480, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7822, PETRI_PLACES=393, PETRI_TRANSITIONS=494} [2024-06-04 16:04:29,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-04 16:04:29,578 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 494 transitions, 7822 flow [2024-06-04 16:04:29,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:29,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:29,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:29,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 16:04:29,578 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:29,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:29,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1586736736, now seen corresponding path program 16 times [2024-06-04 16:04:29,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:29,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188262020] [2024-06-04 16:04:29,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:29,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:29,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:29,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188262020] [2024-06-04 16:04:29,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188262020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:29,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:29,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:29,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030956039] [2024-06-04 16:04:29,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:29,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:29,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:29,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:29,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:29,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:29,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 494 transitions, 7822 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:29,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:29,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:29,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:30,660 INFO L124 PetriNetUnfolderBase]: 2121/3582 cut-off events. [2024-06-04 16:04:30,660 INFO L125 PetriNetUnfolderBase]: For 240304/240304 co-relation queries the response was YES. [2024-06-04 16:04:30,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26347 conditions, 3582 events. 2121/3582 cut-off events. For 240304/240304 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 22238 event pairs, 380 based on Foata normal form. 1/3582 useless extension candidates. Maximal degree in co-relation 26182. Up to 2974 conditions per place. [2024-06-04 16:04:30,707 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 338 selfloop transitions, 170 changer transitions 0/514 dead transitions. [2024-06-04 16:04:30,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 514 transitions, 9228 flow [2024-06-04 16:04:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:04:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:04:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-04 16:04:30,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188470066518847 [2024-06-04 16:04:30,708 INFO L175 Difference]: Start difference. First operand has 393 places, 494 transitions, 7822 flow. Second operand 11 states and 234 transitions. [2024-06-04 16:04:30,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 514 transitions, 9228 flow [2024-06-04 16:04:32,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 514 transitions, 8970 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:32,631 INFO L231 Difference]: Finished difference. Result has 398 places, 494 transitions, 7911 flow [2024-06-04 16:04:32,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7564, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7911, PETRI_PLACES=398, PETRI_TRANSITIONS=494} [2024-06-04 16:04:32,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-04 16:04:32,631 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 494 transitions, 7911 flow [2024-06-04 16:04:32,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:32,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:32,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:32,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 16:04:32,632 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:32,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:32,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1586915296, now seen corresponding path program 17 times [2024-06-04 16:04:32,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:32,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187454974] [2024-06-04 16:04:32,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:32,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:32,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:32,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187454974] [2024-06-04 16:04:32,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187454974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:32,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:32,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:32,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976117740] [2024-06-04 16:04:32,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:32,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:32,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:32,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:32,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:32,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:32,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 494 transitions, 7911 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:32,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:32,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:32,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:33,798 INFO L124 PetriNetUnfolderBase]: 2118/3578 cut-off events. [2024-06-04 16:04:33,798 INFO L125 PetriNetUnfolderBase]: For 242014/242014 co-relation queries the response was YES. [2024-06-04 16:04:33,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26314 conditions, 3578 events. 2118/3578 cut-off events. For 242014/242014 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 22211 event pairs, 380 based on Foata normal form. 1/3578 useless extension candidates. Maximal degree in co-relation 26148. Up to 2971 conditions per place. [2024-06-04 16:04:33,856 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 338 selfloop transitions, 173 changer transitions 0/517 dead transitions. [2024-06-04 16:04:33,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 517 transitions, 9159 flow [2024-06-04 16:04:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:04:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:04:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 300 transitions. [2024-06-04 16:04:33,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-04 16:04:33,858 INFO L175 Difference]: Start difference. First operand has 398 places, 494 transitions, 7911 flow. Second operand 15 states and 300 transitions. [2024-06-04 16:04:33,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 517 transitions, 9159 flow [2024-06-04 16:04:36,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 517 transitions, 8793 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-04 16:04:36,057 INFO L231 Difference]: Finished difference. Result has 403 places, 494 transitions, 7897 flow [2024-06-04 16:04:36,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7545, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7897, PETRI_PLACES=403, PETRI_TRANSITIONS=494} [2024-06-04 16:04:36,057 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-04 16:04:36,057 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 494 transitions, 7897 flow [2024-06-04 16:04:36,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:36,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:36,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:36,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 16:04:36,057 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:36,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:36,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1586920876, now seen corresponding path program 18 times [2024-06-04 16:04:36,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:36,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759097426] [2024-06-04 16:04:36,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:36,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:36,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:36,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759097426] [2024-06-04 16:04:36,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759097426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:36,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:36,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:36,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722516417] [2024-06-04 16:04:36,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:36,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:36,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:36,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:36,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:36,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:36,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 494 transitions, 7897 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:36,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:36,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:36,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:37,413 INFO L124 PetriNetUnfolderBase]: 2115/3574 cut-off events. [2024-06-04 16:04:37,413 INFO L125 PetriNetUnfolderBase]: For 243101/243101 co-relation queries the response was YES. [2024-06-04 16:04:37,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26241 conditions, 3574 events. 2115/3574 cut-off events. For 243101/243101 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 22167 event pairs, 380 based on Foata normal form. 1/3574 useless extension candidates. Maximal degree in co-relation 26074. Up to 2968 conditions per place. [2024-06-04 16:04:37,469 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 337 selfloop transitions, 172 changer transitions 0/515 dead transitions. [2024-06-04 16:04:37,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 515 transitions, 8963 flow [2024-06-04 16:04:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:04:37,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:04:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 283 transitions. [2024-06-04 16:04:37,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930313588850174 [2024-06-04 16:04:37,470 INFO L175 Difference]: Start difference. First operand has 403 places, 494 transitions, 7897 flow. Second operand 14 states and 283 transitions. [2024-06-04 16:04:37,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 515 transitions, 8963 flow [2024-06-04 16:04:39,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 515 transitions, 8406 flow, removed 16 selfloop flow, removed 16 redundant places. [2024-06-04 16:04:39,821 INFO L231 Difference]: Finished difference. Result has 401 places, 494 transitions, 7690 flow [2024-06-04 16:04:39,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7340, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7690, PETRI_PLACES=401, PETRI_TRANSITIONS=494} [2024-06-04 16:04:39,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-04 16:04:39,822 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 494 transitions, 7690 flow [2024-06-04 16:04:39,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:39,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:39,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:39,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 16:04:39,822 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:39,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:39,822 INFO L85 PathProgramCache]: Analyzing trace with hash 837680007, now seen corresponding path program 2 times [2024-06-04 16:04:39,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:39,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531694956] [2024-06-04 16:04:39,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:39,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:40,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:40,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531694956] [2024-06-04 16:04:40,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531694956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:40,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:40,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:40,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222212061] [2024-06-04 16:04:40,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:40,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:40,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:40,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:40,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:40,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:40,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 494 transitions, 7690 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:40,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:40,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:40,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:40,828 INFO L124 PetriNetUnfolderBase]: 2123/3590 cut-off events. [2024-06-04 16:04:40,828 INFO L125 PetriNetUnfolderBase]: For 255592/255600 co-relation queries the response was YES. [2024-06-04 16:04:40,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26129 conditions, 3590 events. 2123/3590 cut-off events. For 255592/255600 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 22379 event pairs, 388 based on Foata normal form. 10/3600 useless extension candidates. Maximal degree in co-relation 25962. Up to 3141 conditions per place. [2024-06-04 16:04:40,880 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 441 selfloop transitions, 60 changer transitions 0/507 dead transitions. [2024-06-04 16:04:40,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 507 transitions, 8758 flow [2024-06-04 16:04:40,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-04 16:04:40,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:04:40,881 INFO L175 Difference]: Start difference. First operand has 401 places, 494 transitions, 7690 flow. Second operand 6 states and 132 transitions. [2024-06-04 16:04:40,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 507 transitions, 8758 flow [2024-06-04 16:04:43,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 507 transitions, 8346 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-04 16:04:43,014 INFO L231 Difference]: Finished difference. Result has 393 places, 496 transitions, 7450 flow [2024-06-04 16:04:43,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7278, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7450, PETRI_PLACES=393, PETRI_TRANSITIONS=496} [2024-06-04 16:04:43,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-04 16:04:43,015 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 496 transitions, 7450 flow [2024-06-04 16:04:43,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:43,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:43,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:43,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 16:04:43,015 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:43,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:43,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1463896219, now seen corresponding path program 3 times [2024-06-04 16:04:43,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:43,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255745268] [2024-06-04 16:04:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:43,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:43,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:43,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255745268] [2024-06-04 16:04:43,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255745268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:43,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:43,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:43,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637770215] [2024-06-04 16:04:43,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:43,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:43,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:43,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:43,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:43,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:43,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 496 transitions, 7450 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:43,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:43,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:43,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:44,016 INFO L124 PetriNetUnfolderBase]: 2131/3597 cut-off events. [2024-06-04 16:04:44,016 INFO L125 PetriNetUnfolderBase]: For 255949/255955 co-relation queries the response was YES. [2024-06-04 16:04:44,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26113 conditions, 3597 events. 2131/3597 cut-off events. For 255949/255955 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 22329 event pairs, 370 based on Foata normal form. 8/3605 useless extension candidates. Maximal degree in co-relation 25945. Up to 3137 conditions per place. [2024-06-04 16:04:44,064 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 440 selfloop transitions, 68 changer transitions 0/514 dead transitions. [2024-06-04 16:04:44,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 514 transitions, 8548 flow [2024-06-04 16:04:44,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:04:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:04:44,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-04 16:04:44,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-04 16:04:44,065 INFO L175 Difference]: Start difference. First operand has 393 places, 496 transitions, 7450 flow. Second operand 8 states and 170 transitions. [2024-06-04 16:04:44,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 514 transitions, 8548 flow [2024-06-04 16:04:45,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 514 transitions, 8394 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-04 16:04:45,975 INFO L231 Difference]: Finished difference. Result has 397 places, 498 transitions, 7496 flow [2024-06-04 16:04:45,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7298, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7496, PETRI_PLACES=397, PETRI_TRANSITIONS=498} [2024-06-04 16:04:45,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-04 16:04:45,976 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 498 transitions, 7496 flow [2024-06-04 16:04:45,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:45,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:45,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:45,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 16:04:45,976 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:45,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:45,977 INFO L85 PathProgramCache]: Analyzing trace with hash 846250887, now seen corresponding path program 4 times [2024-06-04 16:04:45,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:45,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712131636] [2024-06-04 16:04:45,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:45,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:46,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:46,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712131636] [2024-06-04 16:04:46,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712131636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:46,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:46,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:46,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402974825] [2024-06-04 16:04:46,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:46,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:46,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:46,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:46,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:46,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:46,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 498 transitions, 7496 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:46,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:46,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:46,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:47,215 INFO L124 PetriNetUnfolderBase]: 2139/3616 cut-off events. [2024-06-04 16:04:47,216 INFO L125 PetriNetUnfolderBase]: For 260551/260559 co-relation queries the response was YES. [2024-06-04 16:04:47,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26265 conditions, 3616 events. 2139/3616 cut-off events. For 260551/260559 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 22555 event pairs, 356 based on Foata normal form. 10/3626 useless extension candidates. Maximal degree in co-relation 26096. Up to 3109 conditions per place. [2024-06-04 16:04:47,277 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 434 selfloop transitions, 74 changer transitions 0/514 dead transitions. [2024-06-04 16:04:47,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 514 transitions, 8619 flow [2024-06-04 16:04:47,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-04 16:04:47,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-04 16:04:47,279 INFO L175 Difference]: Start difference. First operand has 397 places, 498 transitions, 7496 flow. Second operand 6 states and 133 transitions. [2024-06-04 16:04:47,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 514 transitions, 8619 flow [2024-06-04 16:04:49,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 514 transitions, 8447 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:49,743 INFO L231 Difference]: Finished difference. Result has 398 places, 502 transitions, 7591 flow [2024-06-04 16:04:49,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7332, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7591, PETRI_PLACES=398, PETRI_TRANSITIONS=502} [2024-06-04 16:04:49,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-04 16:04:49,743 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 502 transitions, 7591 flow [2024-06-04 16:04:49,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:49,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:49,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:49,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 16:04:49,744 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:49,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:49,744 INFO L85 PathProgramCache]: Analyzing trace with hash 837672846, now seen corresponding path program 19 times [2024-06-04 16:04:49,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:49,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979583997] [2024-06-04 16:04:49,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:49,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:50,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:50,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979583997] [2024-06-04 16:04:50,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979583997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:50,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:50,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:50,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028131359] [2024-06-04 16:04:50,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:50,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:50,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:50,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:50,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:50,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:50,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 502 transitions, 7591 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:50,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:50,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:50,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:50,758 INFO L124 PetriNetUnfolderBase]: 2176/3679 cut-off events. [2024-06-04 16:04:50,758 INFO L125 PetriNetUnfolderBase]: For 261149/261151 co-relation queries the response was YES. [2024-06-04 16:04:50,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26759 conditions, 3679 events. 2176/3679 cut-off events. For 261149/261151 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 23014 event pairs, 413 based on Foata normal form. 3/3681 useless extension candidates. Maximal degree in co-relation 26588. Up to 2917 conditions per place. [2024-06-04 16:04:50,812 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 300 selfloop transitions, 229 changer transitions 0/535 dead transitions. [2024-06-04 16:04:50,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 535 transitions, 9234 flow [2024-06-04 16:04:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-04 16:04:50,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-04 16:04:50,814 INFO L175 Difference]: Start difference. First operand has 398 places, 502 transitions, 7591 flow. Second operand 9 states and 197 transitions. [2024-06-04 16:04:50,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 535 transitions, 9234 flow [2024-06-04 16:04:53,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 535 transitions, 9110 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-04 16:04:53,599 INFO L231 Difference]: Finished difference. Result has 406 places, 517 transitions, 8206 flow [2024-06-04 16:04:53,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7471, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8206, PETRI_PLACES=406, PETRI_TRANSITIONS=517} [2024-06-04 16:04:53,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-04 16:04:53,600 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 517 transitions, 8206 flow [2024-06-04 16:04:53,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:53,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:53,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:53,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 16:04:53,600 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:53,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:53,601 INFO L85 PathProgramCache]: Analyzing trace with hash 837667266, now seen corresponding path program 20 times [2024-06-04 16:04:53,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:53,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320869169] [2024-06-04 16:04:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:53,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:53,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:53,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320869169] [2024-06-04 16:04:53,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320869169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:53,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:53,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:53,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101613383] [2024-06-04 16:04:53,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:53,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:53,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:53,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:53,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:53,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:53,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 517 transitions, 8206 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:53,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:53,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:53,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:54,982 INFO L124 PetriNetUnfolderBase]: 2173/3675 cut-off events. [2024-06-04 16:04:54,982 INFO L125 PetriNetUnfolderBase]: For 258694/258696 co-relation queries the response was YES. [2024-06-04 16:04:55,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27169 conditions, 3675 events. 2173/3675 cut-off events. For 258694/258696 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 22932 event pairs, 413 based on Foata normal form. 3/3677 useless extension candidates. Maximal degree in co-relation 26995. Up to 2914 conditions per place. [2024-06-04 16:04:55,049 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 300 selfloop transitions, 230 changer transitions 0/536 dead transitions. [2024-06-04 16:04:55,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 536 transitions, 9488 flow [2024-06-04 16:04:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:04:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:04:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-04 16:04:55,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099778270509978 [2024-06-04 16:04:55,051 INFO L175 Difference]: Start difference. First operand has 406 places, 517 transitions, 8206 flow. Second operand 11 states and 230 transitions. [2024-06-04 16:04:55,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 536 transitions, 9488 flow [2024-06-04 16:04:57,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 536 transitions, 9317 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-04 16:04:57,478 INFO L231 Difference]: Finished difference. Result has 414 places, 517 transitions, 8501 flow [2024-06-04 16:04:57,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8035, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8501, PETRI_PLACES=414, PETRI_TRANSITIONS=517} [2024-06-04 16:04:57,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-04 16:04:57,479 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 517 transitions, 8501 flow [2024-06-04 16:04:57,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:57,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:57,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:57,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 16:04:57,479 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:57,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:57,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1463889058, now seen corresponding path program 21 times [2024-06-04 16:04:57,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:57,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914366732] [2024-06-04 16:04:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:57,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:57,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:57,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914366732] [2024-06-04 16:04:57,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914366732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:57,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:57,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:57,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096910031] [2024-06-04 16:04:57,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:57,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:57,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:57,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:57,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:57,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:57,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 517 transitions, 8501 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:57,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:57,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:57,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:58,609 INFO L124 PetriNetUnfolderBase]: 2186/3693 cut-off events. [2024-06-04 16:04:58,609 INFO L125 PetriNetUnfolderBase]: For 263677/263677 co-relation queries the response was YES. [2024-06-04 16:04:58,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27893 conditions, 3693 events. 2186/3693 cut-off events. For 263677/263677 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 23064 event pairs, 382 based on Foata normal form. 1/3693 useless extension candidates. Maximal degree in co-relation 27717. Up to 2929 conditions per place. [2024-06-04 16:04:58,656 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 296 selfloop transitions, 244 changer transitions 0/546 dead transitions. [2024-06-04 16:04:58,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 546 transitions, 10101 flow [2024-06-04 16:04:58,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:04:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:04:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-04 16:04:58,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277161862527716 [2024-06-04 16:04:58,657 INFO L175 Difference]: Start difference. First operand has 414 places, 517 transitions, 8501 flow. Second operand 11 states and 238 transitions. [2024-06-04 16:04:58,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 546 transitions, 10101 flow [2024-06-04 16:05:00,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 546 transitions, 9629 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-04 16:05:00,784 INFO L231 Difference]: Finished difference. Result has 416 places, 523 transitions, 8635 flow [2024-06-04 16:05:00,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8041, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8635, PETRI_PLACES=416, PETRI_TRANSITIONS=523} [2024-06-04 16:05:00,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-04 16:05:00,785 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 523 transitions, 8635 flow [2024-06-04 16:05:00,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:00,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:00,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:00,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 16:05:00,786 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:00,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:00,786 INFO L85 PathProgramCache]: Analyzing trace with hash 609587556, now seen corresponding path program 22 times [2024-06-04 16:05:00,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:00,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358760150] [2024-06-04 16:05:00,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:00,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:01,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:01,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358760150] [2024-06-04 16:05:01,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358760150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:01,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:01,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:01,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310878599] [2024-06-04 16:05:01,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:01,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:01,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:01,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:01,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:01,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:01,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 523 transitions, 8635 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:01,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:01,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:01,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:01,897 INFO L124 PetriNetUnfolderBase]: 2191/3702 cut-off events. [2024-06-04 16:05:01,897 INFO L125 PetriNetUnfolderBase]: For 269046/269046 co-relation queries the response was YES. [2024-06-04 16:05:01,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28048 conditions, 3702 events. 2191/3702 cut-off events. For 269046/269046 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 23158 event pairs, 382 based on Foata normal form. 1/3702 useless extension candidates. Maximal degree in co-relation 27871. Up to 2935 conditions per place. [2024-06-04 16:05:01,952 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 297 selfloop transitions, 247 changer transitions 0/550 dead transitions. [2024-06-04 16:05:01,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 550 transitions, 10198 flow [2024-06-04 16:05:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:05:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:05:01,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-04 16:05:01,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-04 16:05:01,953 INFO L175 Difference]: Start difference. First operand has 416 places, 523 transitions, 8635 flow. Second operand 9 states and 203 transitions. [2024-06-04 16:05:01,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 550 transitions, 10198 flow [2024-06-04 16:05:03,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 550 transitions, 9681 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-04 16:05:03,997 INFO L231 Difference]: Finished difference. Result has 416 places, 526 transitions, 8679 flow [2024-06-04 16:05:03,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8128, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8679, PETRI_PLACES=416, PETRI_TRANSITIONS=526} [2024-06-04 16:05:03,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-04 16:05:03,998 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 526 transitions, 8679 flow [2024-06-04 16:05:03,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:03,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:03,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:03,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 16:05:03,998 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:03,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:03,999 INFO L85 PathProgramCache]: Analyzing trace with hash 609766116, now seen corresponding path program 23 times [2024-06-04 16:05:03,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:03,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128201125] [2024-06-04 16:05:03,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:03,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:04,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:04,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128201125] [2024-06-04 16:05:04,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128201125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:04,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:04,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:04,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792013757] [2024-06-04 16:05:04,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:04,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:04,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:04,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:04,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:04,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:04,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 526 transitions, 8679 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:04,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:04,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:04,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:05,263 INFO L124 PetriNetUnfolderBase]: 2196/3711 cut-off events. [2024-06-04 16:05:05,263 INFO L125 PetriNetUnfolderBase]: For 269034/269034 co-relation queries the response was YES. [2024-06-04 16:05:05,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28108 conditions, 3711 events. 2196/3711 cut-off events. For 269034/269034 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 23208 event pairs, 382 based on Foata normal form. 1/3711 useless extension candidates. Maximal degree in co-relation 27931. Up to 2941 conditions per place. [2024-06-04 16:05:05,316 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 289 selfloop transitions, 258 changer transitions 0/553 dead transitions. [2024-06-04 16:05:05,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 553 transitions, 10246 flow [2024-06-04 16:05:05,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:05:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:05:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-04 16:05:05,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142276422764228 [2024-06-04 16:05:05,317 INFO L175 Difference]: Start difference. First operand has 416 places, 526 transitions, 8679 flow. Second operand 12 states and 253 transitions. [2024-06-04 16:05:05,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 553 transitions, 10246 flow [2024-06-04 16:05:07,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 553 transitions, 9763 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:07,567 INFO L231 Difference]: Finished difference. Result has 421 places, 529 transitions, 8779 flow [2024-06-04 16:05:07,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8206, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8779, PETRI_PLACES=421, PETRI_TRANSITIONS=529} [2024-06-04 16:05:07,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-04 16:05:07,567 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 529 transitions, 8779 flow [2024-06-04 16:05:07,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:07,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:07,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:07,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 16:05:07,568 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:07,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:07,568 INFO L85 PathProgramCache]: Analyzing trace with hash 609598716, now seen corresponding path program 24 times [2024-06-04 16:05:07,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:07,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372440246] [2024-06-04 16:05:07,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:07,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:07,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:07,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372440246] [2024-06-04 16:05:07,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372440246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:07,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:07,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:07,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232751178] [2024-06-04 16:05:07,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:07,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:07,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:07,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:07,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:07,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:07,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 529 transitions, 8779 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:07,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:07,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:07,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:08,690 INFO L124 PetriNetUnfolderBase]: 2193/3707 cut-off events. [2024-06-04 16:05:08,690 INFO L125 PetriNetUnfolderBase]: For 264868/264868 co-relation queries the response was YES. [2024-06-04 16:05:08,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28023 conditions, 3707 events. 2193/3707 cut-off events. For 264868/264868 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 23177 event pairs, 382 based on Foata normal form. 1/3707 useless extension candidates. Maximal degree in co-relation 27846. Up to 2938 conditions per place. [2024-06-04 16:05:08,743 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 294 selfloop transitions, 250 changer transitions 0/550 dead transitions. [2024-06-04 16:05:08,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 550 transitions, 10281 flow [2024-06-04 16:05:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:05:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:05:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-04 16:05:08,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-04 16:05:08,745 INFO L175 Difference]: Start difference. First operand has 421 places, 529 transitions, 8779 flow. Second operand 9 states and 200 transitions. [2024-06-04 16:05:08,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 550 transitions, 10281 flow [2024-06-04 16:05:10,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 550 transitions, 9839 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-04 16:05:10,499 INFO L231 Difference]: Finished difference. Result has 421 places, 529 transitions, 8853 flow [2024-06-04 16:05:10,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8341, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8853, PETRI_PLACES=421, PETRI_TRANSITIONS=529} [2024-06-04 16:05:10,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-04 16:05:10,500 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 529 transitions, 8853 flow [2024-06-04 16:05:10,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:10,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:10,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:10,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 16:05:10,500 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:10,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:10,500 INFO L85 PathProgramCache]: Analyzing trace with hash 609420156, now seen corresponding path program 25 times [2024-06-04 16:05:10,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:10,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489578340] [2024-06-04 16:05:10,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:10,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:10,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:10,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489578340] [2024-06-04 16:05:10,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489578340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:10,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:10,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:10,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019042373] [2024-06-04 16:05:10,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:10,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:10,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:10,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:10,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:10,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:10,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 529 transitions, 8853 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:10,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:10,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:10,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:11,610 INFO L124 PetriNetUnfolderBase]: 2190/3703 cut-off events. [2024-06-04 16:05:11,610 INFO L125 PetriNetUnfolderBase]: For 261204/261204 co-relation queries the response was YES. [2024-06-04 16:05:11,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27920 conditions, 3703 events. 2190/3703 cut-off events. For 261204/261204 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 23203 event pairs, 382 based on Foata normal form. 1/3703 useless extension candidates. Maximal degree in co-relation 27743. Up to 2935 conditions per place. [2024-06-04 16:05:11,662 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 289 selfloop transitions, 264 changer transitions 0/559 dead transitions. [2024-06-04 16:05:11,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 559 transitions, 10213 flow [2024-06-04 16:05:11,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:05:11,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:05:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-06-04 16:05:11,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5140712945590994 [2024-06-04 16:05:11,663 INFO L175 Difference]: Start difference. First operand has 421 places, 529 transitions, 8853 flow. Second operand 13 states and 274 transitions. [2024-06-04 16:05:11,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 559 transitions, 10213 flow [2024-06-04 16:05:13,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 559 transitions, 9672 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-04 16:05:13,748 INFO L231 Difference]: Finished difference. Result has 425 places, 529 transitions, 8856 flow [2024-06-04 16:05:13,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8314, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8856, PETRI_PLACES=425, PETRI_TRANSITIONS=529} [2024-06-04 16:05:13,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-04 16:05:13,749 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 529 transitions, 8856 flow [2024-06-04 16:05:13,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:13,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:13,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:13,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 16:05:13,749 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:13,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:13,749 INFO L85 PathProgramCache]: Analyzing trace with hash 609414576, now seen corresponding path program 26 times [2024-06-04 16:05:13,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:13,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450649077] [2024-06-04 16:05:13,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:13,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:14,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:14,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450649077] [2024-06-04 16:05:14,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450649077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:14,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:14,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:14,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211318905] [2024-06-04 16:05:14,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:14,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:14,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:14,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:14,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:14,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:14,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 529 transitions, 8856 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:14,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:14,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:14,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:14,968 INFO L124 PetriNetUnfolderBase]: 2187/3699 cut-off events. [2024-06-04 16:05:14,968 INFO L125 PetriNetUnfolderBase]: For 256810/256810 co-relation queries the response was YES. [2024-06-04 16:05:15,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27823 conditions, 3699 events. 2187/3699 cut-off events. For 256810/256810 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 23190 event pairs, 382 based on Foata normal form. 1/3699 useless extension candidates. Maximal degree in co-relation 27646. Up to 2932 conditions per place. [2024-06-04 16:05:15,012 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 292 selfloop transitions, 262 changer transitions 0/560 dead transitions. [2024-06-04 16:05:15,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 560 transitions, 10040 flow [2024-06-04 16:05:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:05:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:05:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-04 16:05:15,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-04 16:05:15,013 INFO L175 Difference]: Start difference. First operand has 425 places, 529 transitions, 8856 flow. Second operand 12 states and 261 transitions. [2024-06-04 16:05:15,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 560 transitions, 10040 flow [2024-06-04 16:05:16,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 560 transitions, 9312 flow, removed 12 selfloop flow, removed 15 redundant places. [2024-06-04 16:05:16,905 INFO L231 Difference]: Finished difference. Result has 422 places, 529 transitions, 8666 flow [2024-06-04 16:05:16,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8128, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8666, PETRI_PLACES=422, PETRI_TRANSITIONS=529} [2024-06-04 16:05:16,905 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-04 16:05:16,906 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 529 transitions, 8666 flow [2024-06-04 16:05:16,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:16,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:16,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:16,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 16:05:16,906 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:16,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:16,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1097715234, now seen corresponding path program 27 times [2024-06-04 16:05:16,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:16,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123649340] [2024-06-04 16:05:16,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:16,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:17,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:17,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123649340] [2024-06-04 16:05:17,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123649340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:17,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:17,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:05:17,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284260151] [2024-06-04 16:05:17,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:17,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:05:17,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:17,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:05:17,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:05:17,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:17,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 529 transitions, 8666 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:17,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:17,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:17,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:18,048 INFO L124 PetriNetUnfolderBase]: 2192/3709 cut-off events. [2024-06-04 16:05:18,048 INFO L125 PetriNetUnfolderBase]: For 250874/250874 co-relation queries the response was YES. [2024-06-04 16:05:18,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27735 conditions, 3709 events. 2192/3709 cut-off events. For 250874/250874 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 23290 event pairs, 365 based on Foata normal form. 1/3710 useless extension candidates. Maximal degree in co-relation 27559. Up to 2742 conditions per place. [2024-06-04 16:05:18,099 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 231 selfloop transitions, 336 changer transitions 0/573 dead transitions. [2024-06-04 16:05:18,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 573 transitions, 10194 flow [2024-06-04 16:05:18,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:05:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:05:18,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 297 transitions. [2024-06-04 16:05:18,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174216027874564 [2024-06-04 16:05:18,100 INFO L175 Difference]: Start difference. First operand has 422 places, 529 transitions, 8666 flow. Second operand 14 states and 297 transitions. [2024-06-04 16:05:18,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 573 transitions, 10194 flow [2024-06-04 16:05:19,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 573 transitions, 9610 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-06-04 16:05:19,501 INFO L231 Difference]: Finished difference. Result has 422 places, 535 transitions, 8886 flow [2024-06-04 16:05:19,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8086, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8886, PETRI_PLACES=422, PETRI_TRANSITIONS=535} [2024-06-04 16:05:19,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-04 16:05:19,502 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 535 transitions, 8886 flow [2024-06-04 16:05:19,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:19,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:19,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:19,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 16:05:19,503 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:19,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:19,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1799351699, now seen corresponding path program 5 times [2024-06-04 16:05:19,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:19,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603832680] [2024-06-04 16:05:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:19,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:19,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:19,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603832680] [2024-06-04 16:05:19,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603832680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:19,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:19,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:19,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055994478] [2024-06-04 16:05:19,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:19,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:19,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:19,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:19,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:19,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:19,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 535 transitions, 8886 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:19,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:19,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:19,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:20,714 INFO L124 PetriNetUnfolderBase]: 2200/3717 cut-off events. [2024-06-04 16:05:20,714 INFO L125 PetriNetUnfolderBase]: For 252722/252722 co-relation queries the response was YES. [2024-06-04 16:05:20,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28228 conditions, 3717 events. 2200/3717 cut-off events. For 252722/252722 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 23232 event pairs, 365 based on Foata normal form. 2/3719 useless extension candidates. Maximal degree in co-relation 28053. Up to 3243 conditions per place. [2024-06-04 16:05:20,766 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 483 selfloop transitions, 78 changer transitions 0/567 dead transitions. [2024-06-04 16:05:20,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 567 transitions, 10128 flow [2024-06-04 16:05:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:05:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:05:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-04 16:05:20,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020325203252033 [2024-06-04 16:05:20,767 INFO L175 Difference]: Start difference. First operand has 422 places, 535 transitions, 8886 flow. Second operand 12 states and 247 transitions. [2024-06-04 16:05:20,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 567 transitions, 10128 flow [2024-06-04 16:05:22,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 567 transitions, 9854 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-04 16:05:22,619 INFO L231 Difference]: Finished difference. Result has 426 places, 537 transitions, 8819 flow [2024-06-04 16:05:22,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8612, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8819, PETRI_PLACES=426, PETRI_TRANSITIONS=537} [2024-06-04 16:05:22,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-04 16:05:22,619 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 537 transitions, 8819 flow [2024-06-04 16:05:22,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:22,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:22,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:22,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 16:05:22,620 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:22,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1798876469, now seen corresponding path program 6 times [2024-06-04 16:05:22,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:22,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114490110] [2024-06-04 16:05:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:22,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:22,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:22,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114490110] [2024-06-04 16:05:22,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114490110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:22,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:22,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:22,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651264048] [2024-06-04 16:05:22,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:22,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:22,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:22,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:22,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:22,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:22,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 537 transitions, 8819 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:22,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:22,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:22,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:23,749 INFO L124 PetriNetUnfolderBase]: 2208/3727 cut-off events. [2024-06-04 16:05:23,749 INFO L125 PetriNetUnfolderBase]: For 254242/254242 co-relation queries the response was YES. [2024-06-04 16:05:23,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28169 conditions, 3727 events. 2208/3727 cut-off events. For 254242/254242 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 23317 event pairs, 363 based on Foata normal form. 2/3729 useless extension candidates. Maximal degree in co-relation 27992. Up to 3233 conditions per place. [2024-06-04 16:05:23,802 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 480 selfloop transitions, 84 changer transitions 0/570 dead transitions. [2024-06-04 16:05:23,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 570 transitions, 10073 flow [2024-06-04 16:05:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:05:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:05:23,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-04 16:05:23,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-04 16:05:23,803 INFO L175 Difference]: Start difference. First operand has 426 places, 537 transitions, 8819 flow. Second operand 12 states and 248 transitions. [2024-06-04 16:05:23,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 570 transitions, 10073 flow [2024-06-04 16:05:25,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 570 transitions, 9912 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-04 16:05:25,680 INFO L231 Difference]: Finished difference. Result has 429 places, 539 transitions, 8881 flow [2024-06-04 16:05:25,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8658, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8881, PETRI_PLACES=429, PETRI_TRANSITIONS=539} [2024-06-04 16:05:25,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-04 16:05:25,680 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 539 transitions, 8881 flow [2024-06-04 16:05:25,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:25,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:25,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:25,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 16:05:25,681 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:25,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:25,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1984948730, now seen corresponding path program 28 times [2024-06-04 16:05:25,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:25,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062510950] [2024-06-04 16:05:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:25,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:26,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:26,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062510950] [2024-06-04 16:05:26,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062510950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:26,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:26,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:05:26,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59265073] [2024-06-04 16:05:26,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:26,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:05:26,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:26,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:05:26,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:05:26,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:26,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 539 transitions, 8881 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:26,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:26,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:26,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:26,859 INFO L124 PetriNetUnfolderBase]: 2221/3750 cut-off events. [2024-06-04 16:05:26,859 INFO L125 PetriNetUnfolderBase]: For 260827/260827 co-relation queries the response was YES. [2024-06-04 16:05:26,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28494 conditions, 3750 events. 2221/3750 cut-off events. For 260827/260827 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 23499 event pairs, 384 based on Foata normal form. 1/3750 useless extension candidates. Maximal degree in co-relation 28316. Up to 3197 conditions per place. [2024-06-04 16:05:26,910 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 447 selfloop transitions, 110 changer transitions 0/563 dead transitions. [2024-06-04 16:05:26,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 563 transitions, 10313 flow [2024-06-04 16:05:26,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:05:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:05:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-04 16:05:26,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097560975609756 [2024-06-04 16:05:26,912 INFO L175 Difference]: Start difference. First operand has 429 places, 539 transitions, 8881 flow. Second operand 10 states and 209 transitions. [2024-06-04 16:05:26,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 563 transitions, 10313 flow [2024-06-04 16:05:28,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 563 transitions, 10067 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-04 16:05:28,912 INFO L231 Difference]: Finished difference. Result has 428 places, 545 transitions, 8965 flow [2024-06-04 16:05:28,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8635, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8965, PETRI_PLACES=428, PETRI_TRANSITIONS=545} [2024-06-04 16:05:28,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-04 16:05:28,913 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 545 transitions, 8965 flow [2024-06-04 16:05:28,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:28,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:28,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:28,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 16:05:28,913 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:28,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:28,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1984937570, now seen corresponding path program 29 times [2024-06-04 16:05:28,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:28,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892327322] [2024-06-04 16:05:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:28,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:29,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:29,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892327322] [2024-06-04 16:05:29,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892327322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:29,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:29,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:05:29,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781479560] [2024-06-04 16:05:29,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:29,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:05:29,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:29,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:05:29,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:05:29,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:29,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 545 transitions, 8965 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:29,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:29,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:29,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:30,241 INFO L124 PetriNetUnfolderBase]: 2218/3750 cut-off events. [2024-06-04 16:05:30,241 INFO L125 PetriNetUnfolderBase]: For 261613/261613 co-relation queries the response was YES. [2024-06-04 16:05:30,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28381 conditions, 3750 events. 2218/3750 cut-off events. For 261613/261613 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 23550 event pairs, 386 based on Foata normal form. 1/3750 useless extension candidates. Maximal degree in co-relation 28202. Up to 3194 conditions per place. [2024-06-04 16:05:30,287 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 447 selfloop transitions, 107 changer transitions 0/560 dead transitions. [2024-06-04 16:05:30,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 560 transitions, 10109 flow [2024-06-04 16:05:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:05:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:05:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-04 16:05:30,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-04 16:05:30,289 INFO L175 Difference]: Start difference. First operand has 428 places, 545 transitions, 8965 flow. Second operand 8 states and 174 transitions. [2024-06-04 16:05:30,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 560 transitions, 10109 flow [2024-06-04 16:05:31,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 560 transitions, 9944 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 16:05:31,783 INFO L231 Difference]: Finished difference. Result has 430 places, 545 transitions, 9025 flow [2024-06-04 16:05:31,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8800, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9025, PETRI_PLACES=430, PETRI_TRANSITIONS=545} [2024-06-04 16:05:31,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-04 16:05:31,783 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 545 transitions, 9025 flow [2024-06-04 16:05:31,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:31,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:31,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:31,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 16:05:31,784 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:31,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:31,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1301560430, now seen corresponding path program 30 times [2024-06-04 16:05:31,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:31,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482011321] [2024-06-04 16:05:31,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:31,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:32,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:32,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482011321] [2024-06-04 16:05:32,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482011321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:32,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:32,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:05:32,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698038294] [2024-06-04 16:05:32,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:32,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:05:32,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:32,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:05:32,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:05:32,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:32,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 545 transitions, 9025 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:32,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:32,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:32,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:32,994 INFO L124 PetriNetUnfolderBase]: 2239/3786 cut-off events. [2024-06-04 16:05:32,995 INFO L125 PetriNetUnfolderBase]: For 275244/275244 co-relation queries the response was YES. [2024-06-04 16:05:33,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29029 conditions, 3786 events. 2239/3786 cut-off events. For 275244/275244 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 23823 event pairs, 369 based on Foata normal form. 1/3787 useless extension candidates. Maximal degree in co-relation 28848. Up to 3076 conditions per place. [2024-06-04 16:05:33,050 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 364 selfloop transitions, 218 changer transitions 0/588 dead transitions. [2024-06-04 16:05:33,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 588 transitions, 10803 flow [2024-06-04 16:05:33,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:05:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:05:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 310 transitions. [2024-06-04 16:05:33,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-04 16:05:33,051 INFO L175 Difference]: Start difference. First operand has 430 places, 545 transitions, 9025 flow. Second operand 15 states and 310 transitions. [2024-06-04 16:05:33,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 588 transitions, 10803 flow [2024-06-04 16:05:34,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 588 transitions, 10589 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:34,952 INFO L231 Difference]: Finished difference. Result has 438 places, 554 transitions, 9415 flow [2024-06-04 16:05:34,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8811, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9415, PETRI_PLACES=438, PETRI_TRANSITIONS=554} [2024-06-04 16:05:34,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-04 16:05:34,953 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 554 transitions, 9415 flow [2024-06-04 16:05:34,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:34,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:34,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:34,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 16:05:34,954 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:34,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:34,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1813174010, now seen corresponding path program 31 times [2024-06-04 16:05:34,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:34,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539028950] [2024-06-04 16:05:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:34,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:35,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:35,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539028950] [2024-06-04 16:05:35,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539028950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:35,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:35,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:05:35,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734147976] [2024-06-04 16:05:35,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:35,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:05:35,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:35,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:05:35,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:05:35,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:35,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 554 transitions, 9415 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:35,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:35,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:35,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:36,264 INFO L124 PetriNetUnfolderBase]: 2244/3791 cut-off events. [2024-06-04 16:05:36,265 INFO L125 PetriNetUnfolderBase]: For 281686/281686 co-relation queries the response was YES. [2024-06-04 16:05:36,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29406 conditions, 3791 events. 2244/3791 cut-off events. For 281686/281686 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 23813 event pairs, 365 based on Foata normal form. 1/3792 useless extension candidates. Maximal degree in co-relation 29224. Up to 3082 conditions per place. [2024-06-04 16:05:36,319 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 361 selfloop transitions, 225 changer transitions 0/592 dead transitions. [2024-06-04 16:05:36,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 592 transitions, 10921 flow [2024-06-04 16:05:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-04 16:05:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-04 16:05:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 341 transitions. [2024-06-04 16:05:36,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48923959827833574 [2024-06-04 16:05:36,321 INFO L175 Difference]: Start difference. First operand has 438 places, 554 transitions, 9415 flow. Second operand 17 states and 341 transitions. [2024-06-04 16:05:36,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 592 transitions, 10921 flow [2024-06-04 16:05:38,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 592 transitions, 10661 flow, removed 35 selfloop flow, removed 10 redundant places. [2024-06-04 16:05:38,393 INFO L231 Difference]: Finished difference. Result has 445 places, 557 transitions, 9669 flow [2024-06-04 16:05:38,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9165, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9669, PETRI_PLACES=445, PETRI_TRANSITIONS=557} [2024-06-04 16:05:38,394 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-04 16:05:38,394 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 557 transitions, 9669 flow [2024-06-04 16:05:38,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:38,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:38,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:38,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 16:05:38,395 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:38,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:38,395 INFO L85 PathProgramCache]: Analyzing trace with hash 701070548, now seen corresponding path program 32 times [2024-06-04 16:05:38,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:38,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739585194] [2024-06-04 16:05:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:38,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:38,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:38,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739585194] [2024-06-04 16:05:38,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739585194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:38,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:38,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:05:38,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651945801] [2024-06-04 16:05:38,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:38,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:05:38,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:38,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:05:38,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:05:38,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:38,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 557 transitions, 9669 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:38,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:38,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:38,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:39,669 INFO L124 PetriNetUnfolderBase]: 2241/3787 cut-off events. [2024-06-04 16:05:39,670 INFO L125 PetriNetUnfolderBase]: For 282477/282477 co-relation queries the response was YES. [2024-06-04 16:05:39,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29672 conditions, 3787 events. 2241/3787 cut-off events. For 282477/282477 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 23788 event pairs, 365 based on Foata normal form. 1/3788 useless extension candidates. Maximal degree in co-relation 29488. Up to 3079 conditions per place. [2024-06-04 16:05:39,728 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 363 selfloop transitions, 222 changer transitions 0/591 dead transitions. [2024-06-04 16:05:39,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 591 transitions, 11115 flow [2024-06-04 16:05:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-04 16:05:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-04 16:05:39,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 327 transitions. [2024-06-04 16:05:39,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49847560975609756 [2024-06-04 16:05:39,730 INFO L175 Difference]: Start difference. First operand has 445 places, 557 transitions, 9669 flow. Second operand 16 states and 327 transitions. [2024-06-04 16:05:39,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 591 transitions, 11115 flow [2024-06-04 16:05:42,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 591 transitions, 10611 flow, removed 35 selfloop flow, removed 14 redundant places. [2024-06-04 16:05:42,190 INFO L231 Difference]: Finished difference. Result has 447 places, 557 transitions, 9615 flow [2024-06-04 16:05:42,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9165, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9615, PETRI_PLACES=447, PETRI_TRANSITIONS=557} [2024-06-04 16:05:42,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-04 16:05:42,191 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 557 transitions, 9615 flow [2024-06-04 16:05:42,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:42,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:42,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:42,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 16:05:42,191 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:42,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:42,192 INFO L85 PathProgramCache]: Analyzing trace with hash 542188418, now seen corresponding path program 33 times [2024-06-04 16:05:42,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:42,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347528231] [2024-06-04 16:05:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:42,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:42,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:42,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347528231] [2024-06-04 16:05:42,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347528231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:42,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:42,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:05:42,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769224619] [2024-06-04 16:05:42,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:42,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:05:42,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:42,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:05:42,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:05:42,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:42,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 557 transitions, 9615 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:42,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:42,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:42,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:43,405 INFO L124 PetriNetUnfolderBase]: 2238/3783 cut-off events. [2024-06-04 16:05:43,405 INFO L125 PetriNetUnfolderBase]: For 282763/282763 co-relation queries the response was YES. [2024-06-04 16:05:43,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29538 conditions, 3783 events. 2238/3783 cut-off events. For 282763/282763 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 23784 event pairs, 367 based on Foata normal form. 1/3784 useless extension candidates. Maximal degree in co-relation 29353. Up to 3076 conditions per place. [2024-06-04 16:05:43,460 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 365 selfloop transitions, 215 changer transitions 0/586 dead transitions. [2024-06-04 16:05:43,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 586 transitions, 10851 flow [2024-06-04 16:05:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:05:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:05:43,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-04 16:05:43,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223577235772358 [2024-06-04 16:05:43,461 INFO L175 Difference]: Start difference. First operand has 447 places, 557 transitions, 9615 flow. Second operand 12 states and 257 transitions. [2024-06-04 16:05:43,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 586 transitions, 10851 flow [2024-06-04 16:05:45,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 586 transitions, 10434 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-04 16:05:45,686 INFO L231 Difference]: Finished difference. Result has 447 places, 557 transitions, 9634 flow [2024-06-04 16:05:45,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9198, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9634, PETRI_PLACES=447, PETRI_TRANSITIONS=557} [2024-06-04 16:05:45,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-04 16:05:45,687 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 557 transitions, 9634 flow [2024-06-04 16:05:45,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:45,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:45,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:45,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 16:05:45,688 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:45,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:45,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1916250012, now seen corresponding path program 34 times [2024-06-04 16:05:45,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:45,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130145143] [2024-06-04 16:05:45,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:45,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:46,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:46,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130145143] [2024-06-04 16:05:46,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130145143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:46,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:46,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:05:46,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831529547] [2024-06-04 16:05:46,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:46,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:05:46,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:46,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:05:46,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:05:46,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:46,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 557 transitions, 9634 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:46,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:46,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:46,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:47,154 INFO L124 PetriNetUnfolderBase]: 2243/3791 cut-off events. [2024-06-04 16:05:47,154 INFO L125 PetriNetUnfolderBase]: For 289212/289212 co-relation queries the response was YES. [2024-06-04 16:05:47,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29647 conditions, 3791 events. 2243/3791 cut-off events. For 289212/289212 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 23830 event pairs, 382 based on Foata normal form. 1/3791 useless extension candidates. Maximal degree in co-relation 29461. Up to 3093 conditions per place. [2024-06-04 16:05:47,214 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 396 selfloop transitions, 181 changer transitions 0/583 dead transitions. [2024-06-04 16:05:47,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 583 transitions, 11091 flow [2024-06-04 16:05:47,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:05:47,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:05:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-04 16:05:47,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:05:47,215 INFO L175 Difference]: Start difference. First operand has 447 places, 557 transitions, 9634 flow. Second operand 9 states and 198 transitions. [2024-06-04 16:05:47,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 583 transitions, 11091 flow [2024-06-04 16:05:49,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 583 transitions, 10586 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-04 16:05:49,396 INFO L231 Difference]: Finished difference. Result has 442 places, 560 transitions, 9562 flow [2024-06-04 16:05:49,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9129, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9562, PETRI_PLACES=442, PETRI_TRANSITIONS=560} [2024-06-04 16:05:49,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-04 16:05:49,397 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 560 transitions, 9562 flow [2024-06-04 16:05:49,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:49,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:49,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:49,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 16:05:49,397 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:49,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:49,397 INFO L85 PathProgramCache]: Analyzing trace with hash 585514464, now seen corresponding path program 35 times [2024-06-04 16:05:49,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:49,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579666758] [2024-06-04 16:05:49,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:49,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:49,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:49,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579666758] [2024-06-04 16:05:49,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579666758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:49,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:49,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:05:49,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915443708] [2024-06-04 16:05:49,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:49,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:05:49,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:49,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:05:49,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:05:49,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:49,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 560 transitions, 9562 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:49,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:49,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:49,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:50,588 INFO L124 PetriNetUnfolderBase]: 2240/3791 cut-off events. [2024-06-04 16:05:50,588 INFO L125 PetriNetUnfolderBase]: For 289573/289573 co-relation queries the response was YES. [2024-06-04 16:05:50,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29534 conditions, 3791 events. 2240/3791 cut-off events. For 289573/289573 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 23895 event pairs, 384 based on Foata normal form. 1/3791 useless extension candidates. Maximal degree in co-relation 29347. Up to 3090 conditions per place. [2024-06-04 16:05:50,644 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 399 selfloop transitions, 172 changer transitions 0/577 dead transitions. [2024-06-04 16:05:50,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 577 transitions, 10746 flow [2024-06-04 16:05:50,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:05:50,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:05:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-04 16:05:50,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-04 16:05:50,646 INFO L175 Difference]: Start difference. First operand has 442 places, 560 transitions, 9562 flow. Second operand 7 states and 159 transitions. [2024-06-04 16:05:50,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 577 transitions, 10746 flow [2024-06-04 16:05:52,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 577 transitions, 10155 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-04 16:05:52,910 INFO L231 Difference]: Finished difference. Result has 439 places, 560 transitions, 9335 flow [2024-06-04 16:05:52,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8971, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9335, PETRI_PLACES=439, PETRI_TRANSITIONS=560} [2024-06-04 16:05:52,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-04 16:05:52,910 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 560 transitions, 9335 flow [2024-06-04 16:05:52,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:52,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:52,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:52,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 16:05:52,911 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:52,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:52,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1774789497, now seen corresponding path program 7 times [2024-06-04 16:05:52,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:52,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619644026] [2024-06-04 16:05:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:52,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:53,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:53,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619644026] [2024-06-04 16:05:53,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619644026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:53,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:53,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:53,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279063997] [2024-06-04 16:05:53,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:53,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:53,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:53,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:53,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:53,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:53,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 560 transitions, 9335 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:53,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:53,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:53,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:54,058 INFO L124 PetriNetUnfolderBase]: 2248/3805 cut-off events. [2024-06-04 16:05:54,058 INFO L125 PetriNetUnfolderBase]: For 289718/289720 co-relation queries the response was YES. [2024-06-04 16:05:54,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29447 conditions, 3805 events. 2248/3805 cut-off events. For 289718/289720 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 24013 event pairs, 374 based on Foata normal form. 4/3809 useless extension candidates. Maximal degree in co-relation 29261. Up to 3312 conditions per place. [2024-06-04 16:05:54,113 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 502 selfloop transitions, 76 changer transitions 0/584 dead transitions. [2024-06-04 16:05:54,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 584 transitions, 10599 flow [2024-06-04 16:05:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:05:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:05:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-04 16:05:54,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 16:05:54,114 INFO L175 Difference]: Start difference. First operand has 439 places, 560 transitions, 9335 flow. Second operand 10 states and 205 transitions. [2024-06-04 16:05:54,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 584 transitions, 10599 flow [2024-06-04 16:05:56,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 584 transitions, 10232 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:05:56,320 INFO L231 Difference]: Finished difference. Result has 441 places, 562 transitions, 9179 flow [2024-06-04 16:05:56,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8968, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9179, PETRI_PLACES=441, PETRI_TRANSITIONS=562} [2024-06-04 16:05:56,321 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 399 predicate places. [2024-06-04 16:05:56,321 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 562 transitions, 9179 flow [2024-06-04 16:05:56,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:56,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:56,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:56,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 16:05:56,321 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:56,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:56,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1806237317, now seen corresponding path program 8 times [2024-06-04 16:05:56,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:56,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799869330] [2024-06-04 16:05:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:56,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:56,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:56,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799869330] [2024-06-04 16:05:56,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799869330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:56,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:56,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:56,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621091101] [2024-06-04 16:05:56,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:56,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:56,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:56,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:56,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:56,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:56,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 562 transitions, 9179 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:56,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:56,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:56,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:57,514 INFO L124 PetriNetUnfolderBase]: 2269/3830 cut-off events. [2024-06-04 16:05:57,514 INFO L125 PetriNetUnfolderBase]: For 293473/293475 co-relation queries the response was YES. [2024-06-04 16:05:57,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29717 conditions, 3830 events. 2269/3830 cut-off events. For 293473/293475 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 24145 event pairs, 371 based on Foata normal form. 4/3834 useless extension candidates. Maximal degree in co-relation 29532. Up to 3314 conditions per place. [2024-06-04 16:05:57,571 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 500 selfloop transitions, 84 changer transitions 0/590 dead transitions. [2024-06-04 16:05:57,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 590 transitions, 10709 flow [2024-06-04 16:05:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:05:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:05:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-04 16:05:57,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048780487804878 [2024-06-04 16:05:57,573 INFO L175 Difference]: Start difference. First operand has 441 places, 562 transitions, 9179 flow. Second operand 10 states and 207 transitions. [2024-06-04 16:05:57,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 590 transitions, 10709 flow [2024-06-04 16:05:59,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 590 transitions, 10514 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-04 16:05:59,810 INFO L231 Difference]: Finished difference. Result has 443 places, 566 transitions, 9269 flow [2024-06-04 16:05:59,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8984, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9269, PETRI_PLACES=443, PETRI_TRANSITIONS=566} [2024-06-04 16:05:59,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-04 16:05:59,810 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 566 transitions, 9269 flow [2024-06-04 16:05:59,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:59,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:59,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:59,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 16:05:59,811 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:59,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:59,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1767445008, now seen corresponding path program 36 times [2024-06-04 16:05:59,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:59,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327776481] [2024-06-04 16:05:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:59,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:00,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:00,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327776481] [2024-06-04 16:06:00,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327776481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:00,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:00,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:06:00,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070924665] [2024-06-04 16:06:00,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:00,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:06:00,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:00,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:06:00,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:06:00,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:00,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 566 transitions, 9269 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:00,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:00,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:00,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:00,975 INFO L124 PetriNetUnfolderBase]: 2282/3858 cut-off events. [2024-06-04 16:06:00,975 INFO L125 PetriNetUnfolderBase]: For 299746/299748 co-relation queries the response was YES. [2024-06-04 16:06:01,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30068 conditions, 3858 events. 2282/3858 cut-off events. For 299746/299748 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 24368 event pairs, 377 based on Foata normal form. 3/3861 useless extension candidates. Maximal degree in co-relation 29882. Up to 2924 conditions per place. [2024-06-04 16:06:01,032 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 259 selfloop transitions, 336 changer transitions 0/601 dead transitions. [2024-06-04 16:06:01,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 601 transitions, 11037 flow [2024-06-04 16:06:01,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:06:01,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:06:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 271 transitions. [2024-06-04 16:06:01,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084427767354597 [2024-06-04 16:06:01,033 INFO L175 Difference]: Start difference. First operand has 443 places, 566 transitions, 9269 flow. Second operand 13 states and 271 transitions. [2024-06-04 16:06:01,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 601 transitions, 11037 flow [2024-06-04 16:06:03,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 601 transitions, 10879 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 16:06:03,487 INFO L231 Difference]: Finished difference. Result has 450 places, 572 transitions, 9905 flow [2024-06-04 16:06:03,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9111, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9905, PETRI_PLACES=450, PETRI_TRANSITIONS=572} [2024-06-04 16:06:03,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-04 16:06:03,488 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 572 transitions, 9905 flow [2024-06-04 16:06:03,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:03,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:03,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:03,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 16:06:03,488 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:03,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:03,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1774796658, now seen corresponding path program 37 times [2024-06-04 16:06:03,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:03,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951827546] [2024-06-04 16:06:03,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:03,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:03,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:03,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951827546] [2024-06-04 16:06:03,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951827546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:03,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:03,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:06:03,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531063182] [2024-06-04 16:06:03,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:03,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:06:03,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:03,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:06:03,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:06:03,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:03,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 572 transitions, 9905 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:03,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:03,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:03,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:04,711 INFO L124 PetriNetUnfolderBase]: 2295/3876 cut-off events. [2024-06-04 16:06:04,711 INFO L125 PetriNetUnfolderBase]: For 312072/312074 co-relation queries the response was YES. [2024-06-04 16:06:04,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30966 conditions, 3876 events. 2295/3876 cut-off events. For 312072/312074 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 24491 event pairs, 375 based on Foata normal form. 3/3879 useless extension candidates. Maximal degree in co-relation 30778. Up to 2939 conditions per place. [2024-06-04 16:06:04,767 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 262 selfloop transitions, 342 changer transitions 0/610 dead transitions. [2024-06-04 16:06:04,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 610 transitions, 11909 flow [2024-06-04 16:06:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:06:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:06:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 309 transitions. [2024-06-04 16:06:04,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024390243902439 [2024-06-04 16:06:04,768 INFO L175 Difference]: Start difference. First operand has 450 places, 572 transitions, 9905 flow. Second operand 15 states and 309 transitions. [2024-06-04 16:06:04,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 610 transitions, 11909 flow [2024-06-04 16:06:07,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 610 transitions, 11316 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-04 16:06:07,505 INFO L231 Difference]: Finished difference. Result has 456 places, 578 transitions, 10130 flow [2024-06-04 16:06:07,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9350, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10130, PETRI_PLACES=456, PETRI_TRANSITIONS=578} [2024-06-04 16:06:07,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-04 16:06:07,505 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 578 transitions, 10130 flow [2024-06-04 16:06:07,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:07,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:07,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:07,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 16:06:07,506 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:07,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:07,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1324067975, now seen corresponding path program 9 times [2024-06-04 16:06:07,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:07,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54397700] [2024-06-04 16:06:07,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:07,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:07,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:07,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54397700] [2024-06-04 16:06:07,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54397700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:07,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:07,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:07,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925675599] [2024-06-04 16:06:07,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:07,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:07,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:07,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:07,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:07,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:07,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 578 transitions, 10130 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:07,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:07,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:07,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:08,658 INFO L124 PetriNetUnfolderBase]: 2290/3869 cut-off events. [2024-06-04 16:06:08,658 INFO L125 PetriNetUnfolderBase]: For 313032/313034 co-relation queries the response was YES. [2024-06-04 16:06:08,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30743 conditions, 3869 events. 2290/3869 cut-off events. For 313032/313034 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 24493 event pairs, 374 based on Foata normal form. 4/3873 useless extension candidates. Maximal degree in co-relation 30554. Up to 3372 conditions per place. [2024-06-04 16:06:08,714 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 519 selfloop transitions, 74 changer transitions 0/599 dead transitions. [2024-06-04 16:06:08,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 599 transitions, 11372 flow [2024-06-04 16:06:08,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:06:08,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:06:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-04 16:06:08,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:06:08,715 INFO L175 Difference]: Start difference. First operand has 456 places, 578 transitions, 10130 flow. Second operand 9 states and 189 transitions. [2024-06-04 16:06:08,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 599 transitions, 11372 flow [2024-06-04 16:06:11,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 599 transitions, 10660 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-04 16:06:11,153 INFO L231 Difference]: Finished difference. Result has 455 places, 578 transitions, 9571 flow [2024-06-04 16:06:11,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9418, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9571, PETRI_PLACES=455, PETRI_TRANSITIONS=578} [2024-06-04 16:06:11,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-04 16:06:11,154 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 578 transitions, 9571 flow [2024-06-04 16:06:11,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:11,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:11,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:11,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 16:06:11,154 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:11,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:11,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1332638855, now seen corresponding path program 10 times [2024-06-04 16:06:11,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:11,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940746917] [2024-06-04 16:06:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:11,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:11,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:11,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940746917] [2024-06-04 16:06:11,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940746917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:11,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:11,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:11,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310986310] [2024-06-04 16:06:11,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:11,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:11,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:11,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:11,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:11,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:11,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 578 transitions, 9571 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:11,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:11,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:11,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:12,435 INFO L124 PetriNetUnfolderBase]: 2311/3900 cut-off events. [2024-06-04 16:06:12,435 INFO L125 PetriNetUnfolderBase]: For 326806/326808 co-relation queries the response was YES. [2024-06-04 16:06:12,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30680 conditions, 3900 events. 2311/3900 cut-off events. For 326806/326808 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 24628 event pairs, 375 based on Foata normal form. 4/3904 useless extension candidates. Maximal degree in co-relation 30489. Up to 3368 conditions per place. [2024-06-04 16:06:12,495 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 518 selfloop transitions, 82 changer transitions 0/606 dead transitions. [2024-06-04 16:06:12,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 606 transitions, 11157 flow [2024-06-04 16:06:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:06:12,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:06:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-04 16:06:12,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-04 16:06:12,496 INFO L175 Difference]: Start difference. First operand has 455 places, 578 transitions, 9571 flow. Second operand 9 states and 191 transitions. [2024-06-04 16:06:12,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 606 transitions, 11157 flow [2024-06-04 16:06:15,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 606 transitions, 10970 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-04 16:06:15,246 INFO L231 Difference]: Finished difference. Result has 456 places, 583 transitions, 9699 flow [2024-06-04 16:06:15,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9384, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9699, PETRI_PLACES=456, PETRI_TRANSITIONS=583} [2024-06-04 16:06:15,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-04 16:06:15,247 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 583 transitions, 9699 flow [2024-06-04 16:06:15,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:15,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:15,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:15,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-04 16:06:15,247 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:15,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:15,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1774802238, now seen corresponding path program 38 times [2024-06-04 16:06:15,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:15,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710360729] [2024-06-04 16:06:15,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:15,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:15,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:15,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710360729] [2024-06-04 16:06:15,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710360729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:15,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:15,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:06:15,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961445056] [2024-06-04 16:06:15,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:15,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:06:15,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:15,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:06:15,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:06:15,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:15,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 583 transitions, 9699 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:15,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:15,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:15,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:16,759 INFO L124 PetriNetUnfolderBase]: 2308/3900 cut-off events. [2024-06-04 16:06:16,760 INFO L125 PetriNetUnfolderBase]: For 324333/324335 co-relation queries the response was YES. [2024-06-04 16:06:16,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30759 conditions, 3900 events. 2308/3900 cut-off events. For 324333/324335 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 24708 event pairs, 379 based on Foata normal form. 3/3903 useless extension candidates. Maximal degree in co-relation 30566. Up to 2960 conditions per place. [2024-06-04 16:06:16,829 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 265 selfloop transitions, 344 changer transitions 0/615 dead transitions. [2024-06-04 16:06:16,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 615 transitions, 11401 flow [2024-06-04 16:06:16,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-04 16:06:16,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-04 16:06:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 322 transitions. [2024-06-04 16:06:16,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-04 16:06:16,830 INFO L175 Difference]: Start difference. First operand has 456 places, 583 transitions, 9699 flow. Second operand 16 states and 322 transitions. [2024-06-04 16:06:16,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 615 transitions, 11401 flow [2024-06-04 16:06:19,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 615 transitions, 11223 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-04 16:06:19,833 INFO L231 Difference]: Finished difference. Result has 467 places, 583 transitions, 10215 flow [2024-06-04 16:06:19,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9521, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10215, PETRI_PLACES=467, PETRI_TRANSITIONS=583} [2024-06-04 16:06:19,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-04 16:06:19,833 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 583 transitions, 10215 flow [2024-06-04 16:06:19,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:19,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:19,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:19,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-04 16:06:19,834 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:19,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:19,834 INFO L85 PathProgramCache]: Analyzing trace with hash 310542613, now seen corresponding path program 11 times [2024-06-04 16:06:19,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:19,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309630428] [2024-06-04 16:06:19,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:19,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:20,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:20,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309630428] [2024-06-04 16:06:20,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309630428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:20,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:20,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:20,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115952697] [2024-06-04 16:06:20,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:20,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:20,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:20,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:20,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:20,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:20,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 583 transitions, 10215 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:20,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:20,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:20,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:21,032 INFO L124 PetriNetUnfolderBase]: 2303/3888 cut-off events. [2024-06-04 16:06:21,033 INFO L125 PetriNetUnfolderBase]: For 323946/323946 co-relation queries the response was YES. [2024-06-04 16:06:21,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31079 conditions, 3888 events. 2303/3888 cut-off events. For 323946/323946 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 24556 event pairs, 371 based on Foata normal form. 2/3890 useless extension candidates. Maximal degree in co-relation 30884. Up to 3386 conditions per place. [2024-06-04 16:06:21,100 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 526 selfloop transitions, 80 changer transitions 0/612 dead transitions. [2024-06-04 16:06:21,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 612 transitions, 11522 flow [2024-06-04 16:06:21,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:06:21,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:06:21,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-04 16:06:21,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-04 16:06:21,101 INFO L175 Difference]: Start difference. First operand has 467 places, 583 transitions, 10215 flow. Second operand 10 states and 213 transitions. [2024-06-04 16:06:21,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 612 transitions, 11522 flow [2024-06-04 16:06:23,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 612 transitions, 10786 flow, removed 22 selfloop flow, removed 15 redundant places. [2024-06-04 16:06:23,256 INFO L231 Difference]: Finished difference. Result has 462 places, 584 transitions, 9670 flow [2024-06-04 16:06:23,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9489, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9670, PETRI_PLACES=462, PETRI_TRANSITIONS=584} [2024-06-04 16:06:23,257 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-04 16:06:23,257 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 584 transitions, 9670 flow [2024-06-04 16:06:23,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:23,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:23,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:23,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-04 16:06:23,257 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:23,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:23,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1863740125, now seen corresponding path program 12 times [2024-06-04 16:06:23,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:23,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400280976] [2024-06-04 16:06:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:23,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:23,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:23,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400280976] [2024-06-04 16:06:23,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400280976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:23,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:23,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:23,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387167096] [2024-06-04 16:06:23,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:23,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:23,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:23,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:23,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:23,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:23,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 584 transitions, 9670 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:23,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:23,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:23,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:24,414 INFO L124 PetriNetUnfolderBase]: 2311/3905 cut-off events. [2024-06-04 16:06:24,414 INFO L125 PetriNetUnfolderBase]: For 328911/328913 co-relation queries the response was YES. [2024-06-04 16:06:24,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30651 conditions, 3905 events. 2311/3905 cut-off events. For 328911/328913 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 24778 event pairs, 333 based on Foata normal form. 4/3909 useless extension candidates. Maximal degree in co-relation 30455. Up to 3257 conditions per place. [2024-06-04 16:06:24,477 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 498 selfloop transitions, 109 changer transitions 0/613 dead transitions. [2024-06-04 16:06:24,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 613 transitions, 11286 flow [2024-06-04 16:06:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:06:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:06:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-04 16:06:24,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-04 16:06:24,478 INFO L175 Difference]: Start difference. First operand has 462 places, 584 transitions, 9670 flow. Second operand 9 states and 192 transitions. [2024-06-04 16:06:24,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 613 transitions, 11286 flow [2024-06-04 16:06:26,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 613 transitions, 11185 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 16:06:26,957 INFO L231 Difference]: Finished difference. Result has 467 places, 589 transitions, 9944 flow [2024-06-04 16:06:26,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9569, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9944, PETRI_PLACES=467, PETRI_TRANSITIONS=589} [2024-06-04 16:06:26,957 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-04 16:06:26,958 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 589 transitions, 9944 flow [2024-06-04 16:06:26,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:26,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:26,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:26,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-04 16:06:26,958 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:26,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:26,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2113823609, now seen corresponding path program 13 times [2024-06-04 16:06:26,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:26,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290549048] [2024-06-04 16:06:26,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:26,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:27,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:27,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290549048] [2024-06-04 16:06:27,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290549048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:27,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:27,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:27,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329436890] [2024-06-04 16:06:27,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:27,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:27,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:27,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:27,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:27,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:27,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 589 transitions, 9944 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:27,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:27,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:27,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:28,255 INFO L124 PetriNetUnfolderBase]: 2319/3917 cut-off events. [2024-06-04 16:06:28,255 INFO L125 PetriNetUnfolderBase]: For 337572/337574 co-relation queries the response was YES. [2024-06-04 16:06:28,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31122 conditions, 3917 events. 2319/3917 cut-off events. For 337572/337574 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 24849 event pairs, 336 based on Foata normal form. 4/3921 useless extension candidates. Maximal degree in co-relation 30924. Up to 3265 conditions per place. [2024-06-04 16:06:28,309 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 499 selfloop transitions, 110 changer transitions 0/615 dead transitions. [2024-06-04 16:06:28,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 615 transitions, 11500 flow [2024-06-04 16:06:28,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:06:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:06:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-04 16:06:28,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-04 16:06:28,310 INFO L175 Difference]: Start difference. First operand has 467 places, 589 transitions, 9944 flow. Second operand 9 states and 192 transitions. [2024-06-04 16:06:28,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 615 transitions, 11500 flow [2024-06-04 16:06:30,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 615 transitions, 11079 flow, removed 56 selfloop flow, removed 12 redundant places. [2024-06-04 16:06:30,961 INFO L231 Difference]: Finished difference. Result has 464 places, 591 transitions, 9816 flow [2024-06-04 16:06:30,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9545, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9816, PETRI_PLACES=464, PETRI_TRANSITIONS=591} [2024-06-04 16:06:30,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-04 16:06:30,961 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 591 transitions, 9816 flow [2024-06-04 16:06:30,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:30,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:30,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:30,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-04 16:06:30,962 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:30,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1581327722, now seen corresponding path program 39 times [2024-06-04 16:06:30,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:30,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099183489] [2024-06-04 16:06:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:30,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:31,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:31,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099183489] [2024-06-04 16:06:31,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099183489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:31,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:31,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:06:31,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391571656] [2024-06-04 16:06:31,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:31,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:06:31,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:31,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:06:31,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:06:31,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:31,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 591 transitions, 9816 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:31,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:31,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:31,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:32,197 INFO L124 PetriNetUnfolderBase]: 2324/3921 cut-off events. [2024-06-04 16:06:32,197 INFO L125 PetriNetUnfolderBase]: For 332396/332396 co-relation queries the response was YES. [2024-06-04 16:06:32,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30768 conditions, 3921 events. 2324/3921 cut-off events. For 332396/332396 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 24832 event pairs, 374 based on Foata normal form. 1/3922 useless extension candidates. Maximal degree in co-relation 30571. Up to 3478 conditions per place. [2024-06-04 16:06:32,256 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 576 selfloop transitions, 33 changer transitions 0/615 dead transitions. [2024-06-04 16:06:32,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 615 transitions, 11135 flow [2024-06-04 16:06:32,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:06:32,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:06:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-04 16:06:32,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951219512195122 [2024-06-04 16:06:32,257 INFO L175 Difference]: Start difference. First operand has 464 places, 591 transitions, 9816 flow. Second operand 10 states and 203 transitions. [2024-06-04 16:06:32,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 615 transitions, 11135 flow [2024-06-04 16:06:34,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 615 transitions, 10926 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 16:06:34,982 INFO L231 Difference]: Finished difference. Result has 468 places, 594 transitions, 9730 flow [2024-06-04 16:06:34,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9607, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9730, PETRI_PLACES=468, PETRI_TRANSITIONS=594} [2024-06-04 16:06:34,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-04 16:06:34,983 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 594 transitions, 9730 flow [2024-06-04 16:06:34,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:34,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:34,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:34,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-04 16:06:34,983 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:34,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:34,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1324060814, now seen corresponding path program 40 times [2024-06-04 16:06:34,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:34,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132852229] [2024-06-04 16:06:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:34,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:35,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:35,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132852229] [2024-06-04 16:06:35,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132852229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:35,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:35,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:06:35,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335189956] [2024-06-04 16:06:35,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:35,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:06:35,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:35,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:06:35,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:06:35,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:35,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 594 transitions, 9730 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:35,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:35,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:35,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:36,261 INFO L124 PetriNetUnfolderBase]: 2329/3931 cut-off events. [2024-06-04 16:06:36,261 INFO L125 PetriNetUnfolderBase]: For 339024/339026 co-relation queries the response was YES. [2024-06-04 16:06:36,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30608 conditions, 3931 events. 2329/3931 cut-off events. For 339024/339026 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 24945 event pairs, 380 based on Foata normal form. 3/3934 useless extension candidates. Maximal degree in co-relation 30410. Up to 2989 conditions per place. [2024-06-04 16:06:36,320 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 271 selfloop transitions, 349 changer transitions 0/626 dead transitions. [2024-06-04 16:06:36,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 626 transitions, 11519 flow [2024-06-04 16:06:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:06:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:06:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2024-06-04 16:06:36,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:06:36,321 INFO L175 Difference]: Start difference. First operand has 468 places, 594 transitions, 9730 flow. Second operand 13 states and 273 transitions. [2024-06-04 16:06:36,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 626 transitions, 11519 flow [2024-06-04 16:06:38,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 626 transitions, 11432 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:06:38,802 INFO L231 Difference]: Finished difference. Result has 474 places, 597 transitions, 10398 flow [2024-06-04 16:06:38,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9643, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10398, PETRI_PLACES=474, PETRI_TRANSITIONS=597} [2024-06-04 16:06:38,802 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-04 16:06:38,802 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 597 transitions, 10398 flow [2024-06-04 16:06:38,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:38,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:38,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:38,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-04 16:06:38,803 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:38,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:38,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1262146405, now seen corresponding path program 14 times [2024-06-04 16:06:38,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:38,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783388306] [2024-06-04 16:06:38,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:38,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:39,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:39,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783388306] [2024-06-04 16:06:39,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783388306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:39,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:39,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:39,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874243477] [2024-06-04 16:06:39,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:39,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:39,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:39,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:39,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:39,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:39,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 597 transitions, 10398 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:39,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:39,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:39,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:40,111 INFO L124 PetriNetUnfolderBase]: 2324/3919 cut-off events. [2024-06-04 16:06:40,112 INFO L125 PetriNetUnfolderBase]: For 340735/340735 co-relation queries the response was YES. [2024-06-04 16:06:40,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31056 conditions, 3919 events. 2324/3919 cut-off events. For 340735/340735 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 24830 event pairs, 366 based on Foata normal form. 2/3921 useless extension candidates. Maximal degree in co-relation 30856. Up to 3373 conditions per place. [2024-06-04 16:06:40,172 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 529 selfloop transitions, 92 changer transitions 0/627 dead transitions. [2024-06-04 16:06:40,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 627 transitions, 11738 flow [2024-06-04 16:06:40,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:06:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:06:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-04 16:06:40,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-04 16:06:40,173 INFO L175 Difference]: Start difference. First operand has 474 places, 597 transitions, 10398 flow. Second operand 10 states and 214 transitions. [2024-06-04 16:06:40,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 627 transitions, 11738 flow [2024-06-04 16:06:43,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 627 transitions, 10805 flow, removed 47 selfloop flow, removed 10 redundant places. [2024-06-04 16:06:43,111 INFO L231 Difference]: Finished difference. Result has 474 places, 598 transitions, 9681 flow [2024-06-04 16:06:43,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9477, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9681, PETRI_PLACES=474, PETRI_TRANSITIONS=598} [2024-06-04 16:06:43,111 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-04 16:06:43,111 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 598 transitions, 9681 flow [2024-06-04 16:06:43,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:43,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:43,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:43,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-04 16:06:43,112 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:43,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:43,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1324055234, now seen corresponding path program 41 times [2024-06-04 16:06:43,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:43,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800690323] [2024-06-04 16:06:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:43,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:43,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:43,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800690323] [2024-06-04 16:06:43,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800690323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:43,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:43,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:06:43,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120961103] [2024-06-04 16:06:43,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:43,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:06:43,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:43,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:06:43,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:06:43,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:43,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 598 transitions, 9681 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:43,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:43,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:43,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:44,335 INFO L124 PetriNetUnfolderBase]: 2321/3924 cut-off events. [2024-06-04 16:06:44,335 INFO L125 PetriNetUnfolderBase]: For 333700/333702 co-relation queries the response was YES. [2024-06-04 16:06:44,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29871 conditions, 3924 events. 2321/3924 cut-off events. For 333700/333702 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 24955 event pairs, 381 based on Foata normal form. 3/3927 useless extension candidates. Maximal degree in co-relation 29671. Up to 2979 conditions per place. [2024-06-04 16:06:44,395 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 350 changer transitions 0/628 dead transitions. [2024-06-04 16:06:44,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 628 transitions, 11217 flow [2024-06-04 16:06:44,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:06:44,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:06:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 306 transitions. [2024-06-04 16:06:44,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-04 16:06:44,396 INFO L175 Difference]: Start difference. First operand has 474 places, 598 transitions, 9681 flow. Second operand 15 states and 306 transitions. [2024-06-04 16:06:44,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 628 transitions, 11217 flow [2024-06-04 16:06:46,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 628 transitions, 10945 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-04 16:06:46,957 INFO L231 Difference]: Finished difference. Result has 480 places, 598 transitions, 10115 flow [2024-06-04 16:06:46,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9409, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10115, PETRI_PLACES=480, PETRI_TRANSITIONS=598} [2024-06-04 16:06:46,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-04 16:06:46,958 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 598 transitions, 10115 flow [2024-06-04 16:06:46,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:46,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:46,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:46,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-04 16:06:46,958 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:46,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:46,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1903351842, now seen corresponding path program 42 times [2024-06-04 16:06:46,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:46,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040041930] [2024-06-04 16:06:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:46,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:47,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:47,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040041930] [2024-06-04 16:06:47,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040041930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:47,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:47,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:06:47,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584964759] [2024-06-04 16:06:47,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:47,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:06:47,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:47,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:06:47,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:06:47,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:47,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 598 transitions, 10115 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:47,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:47,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:47,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:48,189 INFO L124 PetriNetUnfolderBase]: 2326/3928 cut-off events. [2024-06-04 16:06:48,189 INFO L125 PetriNetUnfolderBase]: For 339797/339797 co-relation queries the response was YES. [2024-06-04 16:06:48,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30450 conditions, 3928 events. 2326/3928 cut-off events. For 339797/339797 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 24906 event pairs, 374 based on Foata normal form. 1/3929 useless extension candidates. Maximal degree in co-relation 30249. Up to 2985 conditions per place. [2024-06-04 16:06:48,252 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 281 selfloop transitions, 345 changer transitions 0/632 dead transitions. [2024-06-04 16:06:48,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 632 transitions, 11721 flow [2024-06-04 16:06:48,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:06:48,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:06:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-04 16:06:48,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:06:48,253 INFO L175 Difference]: Start difference. First operand has 480 places, 598 transitions, 10115 flow. Second operand 10 states and 225 transitions. [2024-06-04 16:06:48,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 632 transitions, 11721 flow [2024-06-04 16:06:50,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 632 transitions, 10997 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-06-04 16:06:50,978 INFO L231 Difference]: Finished difference. Result has 476 places, 601 transitions, 10145 flow [2024-06-04 16:06:50,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9397, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10145, PETRI_PLACES=476, PETRI_TRANSITIONS=601} [2024-06-04 16:06:50,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-04 16:06:50,978 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 601 transitions, 10145 flow [2024-06-04 16:06:50,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:50,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:50,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:50,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-04 16:06:50,979 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:50,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:50,979 INFO L85 PathProgramCache]: Analyzing trace with hash 757278024, now seen corresponding path program 43 times [2024-06-04 16:06:50,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:50,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976703128] [2024-06-04 16:06:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:50,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:51,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:51,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976703128] [2024-06-04 16:06:51,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976703128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:51,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:51,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:06:51,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726196046] [2024-06-04 16:06:51,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:51,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:06:51,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:51,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:06:51,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:06:51,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:51,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 601 transitions, 10145 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:51,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:51,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:51,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:52,244 INFO L124 PetriNetUnfolderBase]: 2331/3941 cut-off events. [2024-06-04 16:06:52,244 INFO L125 PetriNetUnfolderBase]: For 345580/345580 co-relation queries the response was YES. [2024-06-04 16:06:52,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30555 conditions, 3941 events. 2331/3941 cut-off events. For 345580/345580 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 25092 event pairs, 376 based on Foata normal form. 1/3942 useless extension candidates. Maximal degree in co-relation 30353. Up to 2991 conditions per place. [2024-06-04 16:06:52,307 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 267 selfloop transitions, 367 changer transitions 0/640 dead transitions. [2024-06-04 16:06:52,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 640 transitions, 11779 flow [2024-06-04 16:06:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:06:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:06:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 311 transitions. [2024-06-04 16:06:52,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056910569105691 [2024-06-04 16:06:52,309 INFO L175 Difference]: Start difference. First operand has 476 places, 601 transitions, 10145 flow. Second operand 15 states and 311 transitions. [2024-06-04 16:06:52,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 640 transitions, 11779 flow [2024-06-04 16:06:55,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 640 transitions, 11263 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-04 16:06:55,027 INFO L231 Difference]: Finished difference. Result has 483 places, 604 transitions, 10429 flow [2024-06-04 16:06:55,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9634, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10429, PETRI_PLACES=483, PETRI_TRANSITIONS=604} [2024-06-04 16:06:55,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-04 16:06:55,028 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 604 transitions, 10429 flow [2024-06-04 16:06:55,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:55,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:55,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:55,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-04 16:06:55,029 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:55,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:55,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1269086716, now seen corresponding path program 44 times [2024-06-04 16:06:55,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:55,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622493839] [2024-06-04 16:06:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:55,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:55,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:55,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622493839] [2024-06-04 16:06:55,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622493839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:55,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:55,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:06:55,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449619160] [2024-06-04 16:06:55,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:55,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:06:55,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:55,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:06:55,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:06:55,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:55,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 604 transitions, 10429 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:55,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:55,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:55,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:56,305 INFO L124 PetriNetUnfolderBase]: 2336/3950 cut-off events. [2024-06-04 16:06:56,305 INFO L125 PetriNetUnfolderBase]: For 347223/347223 co-relation queries the response was YES. [2024-06-04 16:06:56,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30736 conditions, 3950 events. 2336/3950 cut-off events. For 347223/347223 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 25157 event pairs, 376 based on Foata normal form. 1/3951 useless extension candidates. Maximal degree in co-relation 30534. Up to 2997 conditions per place. [2024-06-04 16:06:56,365 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 362 changer transitions 0/641 dead transitions. [2024-06-04 16:06:56,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 641 transitions, 12064 flow [2024-06-04 16:06:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:06:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:06:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 279 transitions. [2024-06-04 16:06:56,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234521575984991 [2024-06-04 16:06:56,366 INFO L175 Difference]: Start difference. First operand has 483 places, 604 transitions, 10429 flow. Second operand 13 states and 279 transitions. [2024-06-04 16:06:56,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 641 transitions, 12064 flow [2024-06-04 16:06:59,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 641 transitions, 11204 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-06-04 16:06:59,557 INFO L231 Difference]: Finished difference. Result has 484 places, 607 transitions, 10362 flow [2024-06-04 16:06:59,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10362, PETRI_PLACES=484, PETRI_TRANSITIONS=607} [2024-06-04 16:06:59,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-04 16:06:59,557 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 607 transitions, 10362 flow [2024-06-04 16:06:59,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:59,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:59,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:59,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-04 16:06:59,558 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:59,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:59,558 INFO L85 PathProgramCache]: Analyzing trace with hash 757283604, now seen corresponding path program 45 times [2024-06-04 16:06:59,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:59,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308903427] [2024-06-04 16:06:59,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:59,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:59,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:59,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308903427] [2024-06-04 16:06:59,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308903427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:59,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:59,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:06:59,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953231049] [2024-06-04 16:06:59,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:59,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:06:59,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:59,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:06:59,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:06:59,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:59,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 607 transitions, 10362 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:59,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:59,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:59,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:00,819 INFO L124 PetriNetUnfolderBase]: 2333/3946 cut-off events. [2024-06-04 16:07:00,819 INFO L125 PetriNetUnfolderBase]: For 340939/340939 co-relation queries the response was YES. [2024-06-04 16:07:00,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30541 conditions, 3946 events. 2333/3946 cut-off events. For 340939/340939 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 25122 event pairs, 376 based on Foata normal form. 1/3947 useless extension candidates. Maximal degree in co-relation 30339. Up to 2994 conditions per place. [2024-06-04 16:07:00,881 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 271 selfloop transitions, 364 changer transitions 0/641 dead transitions. [2024-06-04 16:07:00,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 641 transitions, 11720 flow [2024-06-04 16:07:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:07:00,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:07:00,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 296 transitions. [2024-06-04 16:07:00,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156794425087108 [2024-06-04 16:07:00,882 INFO L175 Difference]: Start difference. First operand has 484 places, 607 transitions, 10362 flow. Second operand 14 states and 296 transitions. [2024-06-04 16:07:00,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 641 transitions, 11720 flow [2024-06-04 16:07:03,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 641 transitions, 10751 flow, removed 21 selfloop flow, removed 14 redundant places. [2024-06-04 16:07:03,553 INFO L231 Difference]: Finished difference. Result has 484 places, 607 transitions, 10131 flow [2024-06-04 16:07:03,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9393, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10131, PETRI_PLACES=484, PETRI_TRANSITIONS=607} [2024-06-04 16:07:03,554 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-04 16:07:03,554 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 607 transitions, 10131 flow [2024-06-04 16:07:03,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:03,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:03,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:03,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-04 16:07:03,554 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:03,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:03,554 INFO L85 PathProgramCache]: Analyzing trace with hash -759093273, now seen corresponding path program 1 times [2024-06-04 16:07:03,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:03,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654556329] [2024-06-04 16:07:03,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:03,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:03,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:03,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654556329] [2024-06-04 16:07:03,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654556329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:03,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:03,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:07:03,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222436275] [2024-06-04 16:07:03,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:03,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:07:03,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:03,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:07:03,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:07:03,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:03,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 607 transitions, 10131 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:03,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:03,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:03,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:04,878 INFO L124 PetriNetUnfolderBase]: 2432/4090 cut-off events. [2024-06-04 16:07:04,879 INFO L125 PetriNetUnfolderBase]: For 457510/457510 co-relation queries the response was YES. [2024-06-04 16:07:04,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32919 conditions, 4090 events. 2432/4090 cut-off events. For 457510/457510 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 26013 event pairs, 276 based on Foata normal form. 6/4095 useless extension candidates. Maximal degree in co-relation 32717. Up to 2878 conditions per place. [2024-06-04 16:07:04,939 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 538 selfloop transitions, 103 changer transitions 0/647 dead transitions. [2024-06-04 16:07:04,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 647 transitions, 12067 flow [2024-06-04 16:07:04,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:04,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:04,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:07:04,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-04 16:07:04,940 INFO L175 Difference]: Start difference. First operand has 484 places, 607 transitions, 10131 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:07:04,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 647 transitions, 12067 flow [2024-06-04 16:07:07,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 647 transitions, 11239 flow, removed 3 selfloop flow, removed 15 redundant places. [2024-06-04 16:07:07,754 INFO L231 Difference]: Finished difference. Result has 477 places, 610 transitions, 9579 flow [2024-06-04 16:07:07,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9307, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9579, PETRI_PLACES=477, PETRI_TRANSITIONS=610} [2024-06-04 16:07:07,755 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-04 16:07:07,755 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 610 transitions, 9579 flow [2024-06-04 16:07:07,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:07,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:07,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:07,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-04 16:07:07,755 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:07,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:07,756 INFO L85 PathProgramCache]: Analyzing trace with hash -350816865, now seen corresponding path program 1 times [2024-06-04 16:07:07,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:07,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940211741] [2024-06-04 16:07:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:07,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:08,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:08,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940211741] [2024-06-04 16:07:08,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940211741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:08,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:08,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:08,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409076228] [2024-06-04 16:07:08,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:08,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:08,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:08,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:08,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:08,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:08,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 610 transitions, 9579 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:08,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:08,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:08,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:09,049 INFO L124 PetriNetUnfolderBase]: 2588/4350 cut-off events. [2024-06-04 16:07:09,049 INFO L125 PetriNetUnfolderBase]: For 552549/552549 co-relation queries the response was YES. [2024-06-04 16:07:09,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36019 conditions, 4350 events. 2588/4350 cut-off events. For 552549/552549 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 27933 event pairs, 316 based on Foata normal form. 6/4355 useless extension candidates. Maximal degree in co-relation 35817. Up to 3387 conditions per place. [2024-06-04 16:07:09,116 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 550 selfloop transitions, 100 changer transitions 0/656 dead transitions. [2024-06-04 16:07:09,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 656 transitions, 11652 flow [2024-06-04 16:07:09,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:07:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:07:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-04 16:07:09,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-04 16:07:09,117 INFO L175 Difference]: Start difference. First operand has 477 places, 610 transitions, 9579 flow. Second operand 9 states and 210 transitions. [2024-06-04 16:07:09,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 656 transitions, 11652 flow [2024-06-04 16:07:13,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 656 transitions, 11543 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 16:07:13,302 INFO L231 Difference]: Finished difference. Result has 485 places, 620 transitions, 9900 flow [2024-06-04 16:07:13,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9472, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9900, PETRI_PLACES=485, PETRI_TRANSITIONS=620} [2024-06-04 16:07:13,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-04 16:07:13,303 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 620 transitions, 9900 flow [2024-06-04 16:07:13,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:13,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:13,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:13,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-04 16:07:13,304 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:13,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:13,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2086064729, now seen corresponding path program 2 times [2024-06-04 16:07:13,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:13,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457802628] [2024-06-04 16:07:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:13,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:13,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:13,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457802628] [2024-06-04 16:07:13,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457802628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:13,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:13,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:13,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226767139] [2024-06-04 16:07:13,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:13,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:13,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:13,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:13,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:13,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 620 transitions, 9900 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:13,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:13,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:13,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:14,703 INFO L124 PetriNetUnfolderBase]: 2608/4386 cut-off events. [2024-06-04 16:07:14,703 INFO L125 PetriNetUnfolderBase]: For 566230/566230 co-relation queries the response was YES. [2024-06-04 16:07:14,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36775 conditions, 4386 events. 2608/4386 cut-off events. For 566230/566230 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 28262 event pairs, 362 based on Foata normal form. 6/4391 useless extension candidates. Maximal degree in co-relation 36569. Up to 3736 conditions per place. [2024-06-04 16:07:14,772 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 586 selfloop transitions, 56 changer transitions 0/648 dead transitions. [2024-06-04 16:07:14,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 648 transitions, 11282 flow [2024-06-04 16:07:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-04 16:07:14,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-04 16:07:14,773 INFO L175 Difference]: Start difference. First operand has 485 places, 620 transitions, 9900 flow. Second operand 8 states and 178 transitions. [2024-06-04 16:07:14,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 648 transitions, 11282 flow [2024-06-04 16:07:18,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 648 transitions, 11140 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 16:07:18,854 INFO L231 Difference]: Finished difference. Result has 489 places, 621 transitions, 9894 flow [2024-06-04 16:07:18,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9758, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9894, PETRI_PLACES=489, PETRI_TRANSITIONS=621} [2024-06-04 16:07:18,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-04 16:07:18,855 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 621 transitions, 9894 flow [2024-06-04 16:07:18,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:18,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:18,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:18,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-04 16:07:18,856 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:18,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:18,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1625683395, now seen corresponding path program 2 times [2024-06-04 16:07:18,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:18,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7959965] [2024-06-04 16:07:18,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:18,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:19,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:19,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7959965] [2024-06-04 16:07:19,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7959965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:19,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:19,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:19,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449339790] [2024-06-04 16:07:19,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:19,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:19,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:19,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:19,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:19,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:19,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 621 transitions, 9894 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:19,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:19,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:19,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:20,407 INFO L124 PetriNetUnfolderBase]: 2710/4552 cut-off events. [2024-06-04 16:07:20,407 INFO L125 PetriNetUnfolderBase]: For 652001/652001 co-relation queries the response was YES. [2024-06-04 16:07:20,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39512 conditions, 4552 events. 2710/4552 cut-off events. For 652001/652001 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 29390 event pairs, 349 based on Foata normal form. 6/4557 useless extension candidates. Maximal degree in co-relation 39304. Up to 3475 conditions per place. [2024-06-04 16:07:20,475 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 551 selfloop transitions, 103 changer transitions 0/660 dead transitions. [2024-06-04 16:07:20,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 660 transitions, 11930 flow [2024-06-04 16:07:20,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:07:20,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:07:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-04 16:07:20,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-04 16:07:20,476 INFO L175 Difference]: Start difference. First operand has 489 places, 621 transitions, 9894 flow. Second operand 9 states and 204 transitions. [2024-06-04 16:07:20,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 660 transitions, 11930 flow [2024-06-04 16:07:24,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 660 transitions, 11794 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:25,006 INFO L231 Difference]: Finished difference. Result has 492 places, 628 transitions, 10122 flow [2024-06-04 16:07:25,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9768, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10122, PETRI_PLACES=492, PETRI_TRANSITIONS=628} [2024-06-04 16:07:25,006 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-04 16:07:25,007 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 628 transitions, 10122 flow [2024-06-04 16:07:25,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:25,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:25,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:25,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-04 16:07:25,007 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:25,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:25,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446245, now seen corresponding path program 3 times [2024-06-04 16:07:25,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:25,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850169208] [2024-06-04 16:07:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:25,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:25,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:25,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850169208] [2024-06-04 16:07:25,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850169208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:25,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:25,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:25,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206449425] [2024-06-04 16:07:25,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:25,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:25,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:25,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:25,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:25,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 628 transitions, 10122 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:25,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:25,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:25,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:26,464 INFO L124 PetriNetUnfolderBase]: 2697/4533 cut-off events. [2024-06-04 16:07:26,464 INFO L125 PetriNetUnfolderBase]: For 628886/628886 co-relation queries the response was YES. [2024-06-04 16:07:26,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38956 conditions, 4533 events. 2697/4533 cut-off events. For 628886/628886 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 29352 event pairs, 335 based on Foata normal form. 6/4538 useless extension candidates. Maximal degree in co-relation 38747. Up to 3469 conditions per place. [2024-06-04 16:07:26,538 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 555 selfloop transitions, 101 changer transitions 0/662 dead transitions. [2024-06-04 16:07:26,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 662 transitions, 12046 flow [2024-06-04 16:07:26,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:07:26,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:07:26,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-04 16:07:26,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-04 16:07:26,539 INFO L175 Difference]: Start difference. First operand has 492 places, 628 transitions, 10122 flow. Second operand 9 states and 206 transitions. [2024-06-04 16:07:26,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 662 transitions, 12046 flow [2024-06-04 16:07:30,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 662 transitions, 11874 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 16:07:30,921 INFO L231 Difference]: Finished difference. Result has 497 places, 628 transitions, 10156 flow [2024-06-04 16:07:30,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9950, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10156, PETRI_PLACES=497, PETRI_TRANSITIONS=628} [2024-06-04 16:07:30,921 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-04 16:07:30,921 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 628 transitions, 10156 flow [2024-06-04 16:07:30,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:30,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:30,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:30,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-04 16:07:30,922 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:30,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:30,922 INFO L85 PathProgramCache]: Analyzing trace with hash 711314089, now seen corresponding path program 3 times [2024-06-04 16:07:30,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:30,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164544375] [2024-06-04 16:07:30,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:30,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:31,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:31,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164544375] [2024-06-04 16:07:31,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164544375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:31,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:31,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:31,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916841043] [2024-06-04 16:07:31,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:31,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:31,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:31,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:31,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:31,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:31,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 628 transitions, 10156 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:31,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:31,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:31,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:32,391 INFO L124 PetriNetUnfolderBase]: 2750/4626 cut-off events. [2024-06-04 16:07:32,391 INFO L125 PetriNetUnfolderBase]: For 677835/677835 co-relation queries the response was YES. [2024-06-04 16:07:32,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40166 conditions, 4626 events. 2750/4626 cut-off events. For 677835/677835 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 30027 event pairs, 383 based on Foata normal form. 6/4631 useless extension candidates. Maximal degree in co-relation 39956. Up to 3889 conditions per place. [2024-06-04 16:07:32,470 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 591 selfloop transitions, 62 changer transitions 0/659 dead transitions. [2024-06-04 16:07:32,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 659 transitions, 11830 flow [2024-06-04 16:07:32,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:07:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:07:32,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-04 16:07:32,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-04 16:07:32,471 INFO L175 Difference]: Start difference. First operand has 497 places, 628 transitions, 10156 flow. Second operand 9 states and 194 transitions. [2024-06-04 16:07:32,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 659 transitions, 11830 flow [2024-06-04 16:07:37,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 659 transitions, 11626 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:07:37,893 INFO L231 Difference]: Finished difference. Result has 502 places, 630 transitions, 10130 flow [2024-06-04 16:07:37,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9952, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10130, PETRI_PLACES=502, PETRI_TRANSITIONS=630} [2024-06-04 16:07:37,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-04 16:07:37,894 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 630 transitions, 10130 flow [2024-06-04 16:07:37,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:37,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:37,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:37,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-04 16:07:37,894 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:37,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:37,894 INFO L85 PathProgramCache]: Analyzing trace with hash 660544009, now seen corresponding path program 4 times [2024-06-04 16:07:37,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:37,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557448898] [2024-06-04 16:07:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:37,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:38,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:38,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557448898] [2024-06-04 16:07:38,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557448898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:38,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:38,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:38,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137185231] [2024-06-04 16:07:38,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:38,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:38,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:38,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:38,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:38,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:38,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 630 transitions, 10130 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:38,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:38,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:38,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:39,357 INFO L124 PetriNetUnfolderBase]: 2803/4711 cut-off events. [2024-06-04 16:07:39,357 INFO L125 PetriNetUnfolderBase]: For 729670/729670 co-relation queries the response was YES. [2024-06-04 16:07:39,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41371 conditions, 4711 events. 2803/4711 cut-off events. For 729670/729670 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 30697 event pairs, 453 based on Foata normal form. 6/4714 useless extension candidates. Maximal degree in co-relation 41159. Up to 3582 conditions per place. [2024-06-04 16:07:39,434 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 558 selfloop transitions, 100 changer transitions 0/664 dead transitions. [2024-06-04 16:07:39,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 664 transitions, 12096 flow [2024-06-04 16:07:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:39,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 16:07:39,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-04 16:07:39,435 INFO L175 Difference]: Start difference. First operand has 502 places, 630 transitions, 10130 flow. Second operand 7 states and 169 transitions. [2024-06-04 16:07:39,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 664 transitions, 12096 flow [2024-06-04 16:07:44,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 664 transitions, 11947 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:44,438 INFO L231 Difference]: Finished difference. Result has 502 places, 632 transitions, 10233 flow [2024-06-04 16:07:44,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9981, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10233, PETRI_PLACES=502, PETRI_TRANSITIONS=632} [2024-06-04 16:07:44,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-04 16:07:44,439 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 632 transitions, 10233 flow [2024-06-04 16:07:44,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:44,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:44,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:44,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-04 16:07:44,439 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:44,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:44,439 INFO L85 PathProgramCache]: Analyzing trace with hash 72303273, now seen corresponding path program 5 times [2024-06-04 16:07:44,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:44,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350333374] [2024-06-04 16:07:44,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:44,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:44,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:44,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350333374] [2024-06-04 16:07:44,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350333374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:44,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:44,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:44,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395705261] [2024-06-04 16:07:44,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:44,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:44,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:44,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:44,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:44,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:44,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 632 transitions, 10233 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:44,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:44,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:44,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:46,108 INFO L124 PetriNetUnfolderBase]: 2831/4751 cut-off events. [2024-06-04 16:07:46,108 INFO L125 PetriNetUnfolderBase]: For 754103/754103 co-relation queries the response was YES. [2024-06-04 16:07:46,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41804 conditions, 4751 events. 2831/4751 cut-off events. For 754103/754103 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 30958 event pairs, 498 based on Foata normal form. 8/4758 useless extension candidates. Maximal degree in co-relation 41593. Up to 3807 conditions per place. [2024-06-04 16:07:46,178 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 549 selfloop transitions, 107 changer transitions 0/662 dead transitions. [2024-06-04 16:07:46,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 662 transitions, 11943 flow [2024-06-04 16:07:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:46,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:07:46,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-04 16:07:46,179 INFO L175 Difference]: Start difference. First operand has 502 places, 632 transitions, 10233 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:07:46,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 662 transitions, 11943 flow [2024-06-04 16:07:51,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 662 transitions, 11718 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 16:07:51,562 INFO L231 Difference]: Finished difference. Result has 505 places, 633 transitions, 10257 flow [2024-06-04 16:07:51,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10012, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10257, PETRI_PLACES=505, PETRI_TRANSITIONS=633} [2024-06-04 16:07:51,563 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-04 16:07:51,563 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 633 transitions, 10257 flow [2024-06-04 16:07:51,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:51,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:51,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:51,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-04 16:07:51,564 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:51,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:51,564 INFO L85 PathProgramCache]: Analyzing trace with hash 811217959, now seen corresponding path program 6 times [2024-06-04 16:07:51,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:51,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424254916] [2024-06-04 16:07:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:51,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:51,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:51,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424254916] [2024-06-04 16:07:51,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424254916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:51,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:51,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:51,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096004390] [2024-06-04 16:07:51,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:51,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:51,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:51,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:51,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:51,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:51,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 633 transitions, 10257 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:51,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:51,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:51,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:53,079 INFO L124 PetriNetUnfolderBase]: 2859/4797 cut-off events. [2024-06-04 16:07:53,079 INFO L125 PetriNetUnfolderBase]: For 766670/766670 co-relation queries the response was YES. [2024-06-04 16:07:53,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42091 conditions, 4797 events. 2859/4797 cut-off events. For 766670/766670 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 31263 event pairs, 579 based on Foata normal form. 8/4802 useless extension candidates. Maximal degree in co-relation 41879. Up to 4129 conditions per place. [2024-06-04 16:07:53,163 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 551 selfloop transitions, 98 changer transitions 0/655 dead transitions. [2024-06-04 16:07:53,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 655 transitions, 11665 flow [2024-06-04 16:07:53,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:53,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:07:53,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-04 16:07:53,164 INFO L175 Difference]: Start difference. First operand has 505 places, 633 transitions, 10257 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:07:53,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 655 transitions, 11665 flow [2024-06-04 16:07:58,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 655 transitions, 11430 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:58,405 INFO L231 Difference]: Finished difference. Result has 506 places, 634 transitions, 10255 flow [2024-06-04 16:07:58,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10026, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10255, PETRI_PLACES=506, PETRI_TRANSITIONS=634} [2024-06-04 16:07:58,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-04 16:07:58,406 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 634 transitions, 10255 flow [2024-06-04 16:07:58,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:58,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:58,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:58,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-04 16:07:58,406 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:58,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:58,407 INFO L85 PathProgramCache]: Analyzing trace with hash 660664165, now seen corresponding path program 4 times [2024-06-04 16:07:58,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:58,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212414762] [2024-06-04 16:07:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:58,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:58,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:58,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212414762] [2024-06-04 16:07:58,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212414762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:58,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:58,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:58,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316572487] [2024-06-04 16:07:58,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:58,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:58,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:58,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:58,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 634 transitions, 10255 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:58,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:58,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:58,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:59,909 INFO L124 PetriNetUnfolderBase]: 2846/4765 cut-off events. [2024-06-04 16:07:59,910 INFO L125 PetriNetUnfolderBase]: For 712648/712648 co-relation queries the response was YES. [2024-06-04 16:07:59,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41105 conditions, 4765 events. 2846/4765 cut-off events. For 712648/712648 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 31001 event pairs, 545 based on Foata normal form. 6/4761 useless extension candidates. Maximal degree in co-relation 40893. Up to 4074 conditions per place. [2024-06-04 16:07:59,992 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 572 selfloop transitions, 83 changer transitions 0/661 dead transitions. [2024-06-04 16:07:59,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 661 transitions, 11913 flow [2024-06-04 16:07:59,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:07:59,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-04 16:07:59,993 INFO L175 Difference]: Start difference. First operand has 506 places, 634 transitions, 10255 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:07:59,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 661 transitions, 11913 flow [2024-06-04 16:08:04,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 661 transitions, 11694 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:08:04,526 INFO L231 Difference]: Finished difference. Result has 508 places, 634 transitions, 10208 flow [2024-06-04 16:08:04,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10038, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10208, PETRI_PLACES=508, PETRI_TRANSITIONS=634} [2024-06-04 16:08:04,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-04 16:08:04,527 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 634 transitions, 10208 flow [2024-06-04 16:08:04,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:04,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:04,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:04,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-04 16:08:04,528 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:04,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash 660663979, now seen corresponding path program 7 times [2024-06-04 16:08:04,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:04,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888925038] [2024-06-04 16:08:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:04,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:04,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:04,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888925038] [2024-06-04 16:08:04,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888925038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:04,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:04,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:04,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540347418] [2024-06-04 16:08:04,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:04,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:04,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:04,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:04,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:04,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:04,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 634 transitions, 10208 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:04,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:04,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:04,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:06,114 INFO L124 PetriNetUnfolderBase]: 2833/4748 cut-off events. [2024-06-04 16:08:06,114 INFO L125 PetriNetUnfolderBase]: For 669965/669965 co-relation queries the response was YES. [2024-06-04 16:08:06,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40161 conditions, 4748 events. 2833/4748 cut-off events. For 669965/669965 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 30933 event pairs, 548 based on Foata normal form. 6/4744 useless extension candidates. Maximal degree in co-relation 39949. Up to 4174 conditions per place. [2024-06-04 16:08:06,210 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 602 selfloop transitions, 48 changer transitions 0/656 dead transitions. [2024-06-04 16:08:06,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 656 transitions, 11576 flow [2024-06-04 16:08:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:06,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-04 16:08:06,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-04 16:08:06,210 INFO L175 Difference]: Start difference. First operand has 508 places, 634 transitions, 10208 flow. Second operand 7 states and 156 transitions. [2024-06-04 16:08:06,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 656 transitions, 11576 flow [2024-06-04 16:08:10,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 656 transitions, 11410 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 16:08:10,494 INFO L231 Difference]: Finished difference. Result has 508 places, 634 transitions, 10142 flow [2024-06-04 16:08:10,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10042, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10142, PETRI_PLACES=508, PETRI_TRANSITIONS=634} [2024-06-04 16:08:10,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-04 16:08:10,495 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 634 transitions, 10142 flow [2024-06-04 16:08:10,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:10,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:10,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:10,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-04 16:08:10,495 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:10,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:10,495 INFO L85 PathProgramCache]: Analyzing trace with hash 196344069, now seen corresponding path program 5 times [2024-06-04 16:08:10,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:10,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748347866] [2024-06-04 16:08:10,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:10,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:10,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:10,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748347866] [2024-06-04 16:08:10,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748347866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:10,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:10,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:10,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701656569] [2024-06-04 16:08:10,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:10,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:10,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:10,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:10,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:10,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:10,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 634 transitions, 10142 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:10,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:10,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:10,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:12,135 INFO L124 PetriNetUnfolderBase]: 2861/4807 cut-off events. [2024-06-04 16:08:12,135 INFO L125 PetriNetUnfolderBase]: For 696789/696789 co-relation queries the response was YES. [2024-06-04 16:08:12,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40519 conditions, 4807 events. 2861/4807 cut-off events. For 696789/696789 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 31443 event pairs, 567 based on Foata normal form. 8/4814 useless extension candidates. Maximal degree in co-relation 40306. Up to 4211 conditions per place. [2024-06-04 16:08:12,207 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 573 selfloop transitions, 75 changer transitions 0/654 dead transitions. [2024-06-04 16:08:12,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 654 transitions, 11553 flow [2024-06-04 16:08:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:12,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-04 16:08:12,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-04 16:08:12,208 INFO L175 Difference]: Start difference. First operand has 508 places, 634 transitions, 10142 flow. Second operand 8 states and 179 transitions. [2024-06-04 16:08:12,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 654 transitions, 11553 flow [2024-06-04 16:08:16,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 654 transitions, 11454 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:08:16,978 INFO L231 Difference]: Finished difference. Result has 510 places, 635 transitions, 10241 flow [2024-06-04 16:08:16,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10043, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10241, PETRI_PLACES=510, PETRI_TRANSITIONS=635} [2024-06-04 16:08:16,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-04 16:08:16,979 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 635 transitions, 10241 flow [2024-06-04 16:08:16,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:16,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:16,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:16,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-04 16:08:16,979 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:16,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:16,980 INFO L85 PathProgramCache]: Analyzing trace with hash 196165323, now seen corresponding path program 8 times [2024-06-04 16:08:16,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:16,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852045157] [2024-06-04 16:08:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:16,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:17,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:17,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852045157] [2024-06-04 16:08:17,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852045157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:17,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:17,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:17,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595370342] [2024-06-04 16:08:17,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:17,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:17,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:17,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:17,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:17,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:17,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 635 transitions, 10241 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:17,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:17,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:17,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:18,494 INFO L124 PetriNetUnfolderBase]: 2889/4847 cut-off events. [2024-06-04 16:08:18,495 INFO L125 PetriNetUnfolderBase]: For 708394/708394 co-relation queries the response was YES. [2024-06-04 16:08:18,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41021 conditions, 4847 events. 2889/4847 cut-off events. For 708394/708394 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 31710 event pairs, 573 based on Foata normal form. 8/4852 useless extension candidates. Maximal degree in co-relation 40807. Up to 4253 conditions per place. [2024-06-04 16:08:18,578 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 585 selfloop transitions, 63 changer transitions 0/654 dead transitions. [2024-06-04 16:08:18,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 654 transitions, 11637 flow [2024-06-04 16:08:18,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:18,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-04 16:08:18,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-04 16:08:18,580 INFO L175 Difference]: Start difference. First operand has 510 places, 635 transitions, 10241 flow. Second operand 7 states and 159 transitions. [2024-06-04 16:08:18,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 654 transitions, 11637 flow [2024-06-04 16:08:23,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 654 transitions, 11482 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 16:08:23,355 INFO L231 Difference]: Finished difference. Result has 511 places, 636 transitions, 10248 flow [2024-06-04 16:08:23,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10086, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10248, PETRI_PLACES=511, PETRI_TRANSITIONS=636} [2024-06-04 16:08:23,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-04 16:08:23,356 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 636 transitions, 10248 flow [2024-06-04 16:08:23,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:23,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:23,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:23,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-04 16:08:23,357 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:23,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:23,358 INFO L85 PathProgramCache]: Analyzing trace with hash 926361445, now seen corresponding path program 6 times [2024-06-04 16:08:23,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:23,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098883510] [2024-06-04 16:08:23,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:23,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:23,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:23,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098883510] [2024-06-04 16:08:23,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098883510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:23,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:23,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:23,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252988931] [2024-06-04 16:08:23,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:23,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:23,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:23,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:23,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:23,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:23,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 636 transitions, 10248 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:23,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:23,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:23,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:24,932 INFO L124 PetriNetUnfolderBase]: 2917/4893 cut-off events. [2024-06-04 16:08:24,932 INFO L125 PetriNetUnfolderBase]: For 707009/707009 co-relation queries the response was YES. [2024-06-04 16:08:25,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41393 conditions, 4893 events. 2917/4893 cut-off events. For 707009/707009 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 32070 event pairs, 567 based on Foata normal form. 6/4896 useless extension candidates. Maximal degree in co-relation 41178. Up to 4269 conditions per place. [2024-06-04 16:08:25,026 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 580 selfloop transitions, 75 changer transitions 0/661 dead transitions. [2024-06-04 16:08:25,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 661 transitions, 11718 flow [2024-06-04 16:08:25,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:25,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:25,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-04 16:08:25,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:08:25,027 INFO L175 Difference]: Start difference. First operand has 511 places, 636 transitions, 10248 flow. Second operand 8 states and 180 transitions. [2024-06-04 16:08:25,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 661 transitions, 11718 flow [2024-06-04 16:08:29,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 661 transitions, 11583 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:29,513 INFO L231 Difference]: Finished difference. Result has 515 places, 639 transitions, 10343 flow [2024-06-04 16:08:29,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10113, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10343, PETRI_PLACES=515, PETRI_TRANSITIONS=639} [2024-06-04 16:08:29,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 473 predicate places. [2024-06-04 16:08:29,513 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 639 transitions, 10343 flow [2024-06-04 16:08:29,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:29,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:29,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:29,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-04 16:08:29,514 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:29,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:29,514 INFO L85 PathProgramCache]: Analyzing trace with hash 668073289, now seen corresponding path program 9 times [2024-06-04 16:08:29,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:29,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995884411] [2024-06-04 16:08:29,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:29,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:29,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:29,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995884411] [2024-06-04 16:08:29,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995884411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:29,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:29,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:29,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385911189] [2024-06-04 16:08:29,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:29,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:29,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:29,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:29,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:29,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:29,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 639 transitions, 10343 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:29,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:29,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:29,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:31,096 INFO L124 PetriNetUnfolderBase]: 2937/4929 cut-off events. [2024-06-04 16:08:31,096 INFO L125 PetriNetUnfolderBase]: For 718843/718843 co-relation queries the response was YES. [2024-06-04 16:08:31,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41770 conditions, 4929 events. 2937/4929 cut-off events. For 718843/718843 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 32325 event pairs, 575 based on Foata normal form. 6/4930 useless extension candidates. Maximal degree in co-relation 41553. Up to 4299 conditions per place. [2024-06-04 16:08:31,181 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 590 selfloop transitions, 66 changer transitions 0/662 dead transitions. [2024-06-04 16:08:31,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 662 transitions, 11777 flow [2024-06-04 16:08:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-04 16:08:31,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-04 16:08:31,182 INFO L175 Difference]: Start difference. First operand has 515 places, 639 transitions, 10343 flow. Second operand 8 states and 178 transitions. [2024-06-04 16:08:31,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 662 transitions, 11777 flow [2024-06-04 16:08:35,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 662 transitions, 11615 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:35,671 INFO L231 Difference]: Finished difference. Result has 518 places, 640 transitions, 10339 flow [2024-06-04 16:08:35,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10181, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10339, PETRI_PLACES=518, PETRI_TRANSITIONS=640} [2024-06-04 16:08:35,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-04 16:08:35,672 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 640 transitions, 10339 flow [2024-06-04 16:08:35,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:35,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:35,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:35,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-04 16:08:35,672 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:35,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:35,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1902287775, now seen corresponding path program 7 times [2024-06-04 16:08:35,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:35,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073965900] [2024-06-04 16:08:35,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:35,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:36,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:36,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073965900] [2024-06-04 16:08:36,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073965900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:36,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:36,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:36,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176991513] [2024-06-04 16:08:36,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:36,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:36,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:36,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:36,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:36,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:36,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 640 transitions, 10339 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:36,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:36,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:36,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:37,451 INFO L124 PetriNetUnfolderBase]: 2965/4969 cut-off events. [2024-06-04 16:08:37,451 INFO L125 PetriNetUnfolderBase]: For 745351/745351 co-relation queries the response was YES. [2024-06-04 16:08:37,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42178 conditions, 4969 events. 2965/4969 cut-off events. For 745351/745351 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 32605 event pairs, 581 based on Foata normal form. 8/4976 useless extension candidates. Maximal degree in co-relation 41960. Up to 4331 conditions per place. [2024-06-04 16:08:37,530 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 573 selfloop transitions, 80 changer transitions 0/659 dead transitions. [2024-06-04 16:08:37,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 659 transitions, 11762 flow [2024-06-04 16:08:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:37,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-04 16:08:37,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-04 16:08:37,531 INFO L175 Difference]: Start difference. First operand has 518 places, 640 transitions, 10339 flow. Second operand 7 states and 160 transitions. [2024-06-04 16:08:37,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 659 transitions, 11762 flow [2024-06-04 16:08:42,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 659 transitions, 11633 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:42,049 INFO L231 Difference]: Finished difference. Result has 520 places, 641 transitions, 10431 flow [2024-06-04 16:08:42,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10210, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10431, PETRI_PLACES=520, PETRI_TRANSITIONS=641} [2024-06-04 16:08:42,050 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 478 predicate places. [2024-06-04 16:08:42,050 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 641 transitions, 10431 flow [2024-06-04 16:08:42,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:42,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:42,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:42,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-04 16:08:42,050 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:42,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:42,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1677243585, now seen corresponding path program 8 times [2024-06-04 16:08:42,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:42,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486344782] [2024-06-04 16:08:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:42,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:42,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:42,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486344782] [2024-06-04 16:08:42,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486344782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:42,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:42,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:42,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131192773] [2024-06-04 16:08:42,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:42,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:42,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:42,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:42,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:42,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:42,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 641 transitions, 10431 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:42,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:42,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:42,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:43,597 INFO L124 PetriNetUnfolderBase]: 3013/5057 cut-off events. [2024-06-04 16:08:43,597 INFO L125 PetriNetUnfolderBase]: For 791360/791360 co-relation queries the response was YES. [2024-06-04 16:08:43,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43544 conditions, 5057 events. 3013/5057 cut-off events. For 791360/791360 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 33337 event pairs, 539 based on Foata normal form. 8/5064 useless extension candidates. Maximal degree in co-relation 43325. Up to 4241 conditions per place. [2024-06-04 16:08:43,682 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 566 selfloop transitions, 95 changer transitions 0/667 dead transitions. [2024-06-04 16:08:43,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 667 transitions, 12199 flow [2024-06-04 16:08:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:43,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:08:43,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-04 16:08:43,683 INFO L175 Difference]: Start difference. First operand has 520 places, 641 transitions, 10431 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:08:43,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 667 transitions, 12199 flow [2024-06-04 16:08:48,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 667 transitions, 12033 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:48,642 INFO L231 Difference]: Finished difference. Result has 524 places, 643 transitions, 10581 flow [2024-06-04 16:08:48,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10269, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10581, PETRI_PLACES=524, PETRI_TRANSITIONS=643} [2024-06-04 16:08:48,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 482 predicate places. [2024-06-04 16:08:48,643 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 643 transitions, 10581 flow [2024-06-04 16:08:48,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:48,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:48,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:48,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-04 16:08:48,643 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:48,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:48,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1991179965, now seen corresponding path program 9 times [2024-06-04 16:08:48,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:48,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683863470] [2024-06-04 16:08:48,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:48,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:48,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:48,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683863470] [2024-06-04 16:08:48,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683863470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:48,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:48,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:48,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890982148] [2024-06-04 16:08:48,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:48,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:48,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:48,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:48,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:49,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:49,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 643 transitions, 10581 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:49,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:49,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:49,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:50,237 INFO L124 PetriNetUnfolderBase]: 3033/5089 cut-off events. [2024-06-04 16:08:50,237 INFO L125 PetriNetUnfolderBase]: For 778922/778922 co-relation queries the response was YES. [2024-06-04 16:08:50,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43988 conditions, 5089 events. 3033/5089 cut-off events. For 778922/778922 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 33499 event pairs, 378 based on Foata normal form. 6/5094 useless extension candidates. Maximal degree in co-relation 43767. Up to 3862 conditions per place. [2024-06-04 16:08:50,329 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 559 selfloop transitions, 113 changer transitions 0/678 dead transitions. [2024-06-04 16:08:50,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 678 transitions, 12618 flow [2024-06-04 16:08:50,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:50,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 16:08:50,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-04 16:08:50,333 INFO L175 Difference]: Start difference. First operand has 524 places, 643 transitions, 10581 flow. Second operand 8 states and 193 transitions. [2024-06-04 16:08:50,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 678 transitions, 12618 flow [2024-06-04 16:08:55,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 678 transitions, 12403 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 16:08:55,028 INFO L231 Difference]: Finished difference. Result has 526 places, 644 transitions, 10635 flow [2024-06-04 16:08:55,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10366, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10635, PETRI_PLACES=526, PETRI_TRANSITIONS=644} [2024-06-04 16:08:55,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 484 predicate places. [2024-06-04 16:08:55,029 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 644 transitions, 10635 flow [2024-06-04 16:08:55,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:55,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:55,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:55,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-04 16:08:55,029 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:55,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:55,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1902614205, now seen corresponding path program 10 times [2024-06-04 16:08:55,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:55,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964626844] [2024-06-04 16:08:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:55,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:55,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:55,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964626844] [2024-06-04 16:08:55,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964626844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:55,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:55,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:55,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227928922] [2024-06-04 16:08:55,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:55,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:55,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:55,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:55,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:55,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:55,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 644 transitions, 10635 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:55,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:55,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:55,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:56,768 INFO L124 PetriNetUnfolderBase]: 3020/5053 cut-off events. [2024-06-04 16:08:56,768 INFO L125 PetriNetUnfolderBase]: For 743122/743122 co-relation queries the response was YES. [2024-06-04 16:08:56,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43243 conditions, 5053 events. 3020/5053 cut-off events. For 743122/743122 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 33209 event pairs, 573 based on Foata normal form. 6/5047 useless extension candidates. Maximal degree in co-relation 43021. Up to 4248 conditions per place. [2024-06-04 16:08:56,846 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 574 selfloop transitions, 89 changer transitions 0/669 dead transitions. [2024-06-04 16:08:56,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 669 transitions, 12319 flow [2024-06-04 16:08:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 16:08:56,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-04 16:08:56,847 INFO L175 Difference]: Start difference. First operand has 526 places, 644 transitions, 10635 flow. Second operand 7 states and 165 transitions. [2024-06-04 16:08:56,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 669 transitions, 12319 flow [2024-06-04 16:09:01,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 669 transitions, 12085 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-04 16:09:01,664 INFO L231 Difference]: Finished difference. Result has 526 places, 644 transitions, 10591 flow [2024-06-04 16:09:01,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10405, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10591, PETRI_PLACES=526, PETRI_TRANSITIONS=644} [2024-06-04 16:09:01,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 484 predicate places. [2024-06-04 16:09:01,665 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 644 transitions, 10591 flow [2024-06-04 16:09:01,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:01,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:01,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:01,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-04 16:09:01,666 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:01,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:01,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1902614391, now seen corresponding path program 10 times [2024-06-04 16:09:01,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:01,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148592138] [2024-06-04 16:09:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:01,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:01,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:01,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148592138] [2024-06-04 16:09:01,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148592138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:01,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:01,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:01,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021843598] [2024-06-04 16:09:01,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:01,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:01,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:01,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:01,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:02,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:02,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 644 transitions, 10591 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:02,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:02,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:02,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:03,253 INFO L124 PetriNetUnfolderBase]: 3007/5047 cut-off events. [2024-06-04 16:09:03,253 INFO L125 PetriNetUnfolderBase]: For 685893/685893 co-relation queries the response was YES. [2024-06-04 16:09:03,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42071 conditions, 5047 events. 3007/5047 cut-off events. For 685893/685893 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 33366 event pairs, 493 based on Foata normal form. 6/5048 useless extension candidates. Maximal degree in co-relation 41850. Up to 4018 conditions per place. [2024-06-04 16:09:03,338 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 565 selfloop transitions, 104 changer transitions 0/675 dead transitions. [2024-06-04 16:09:03,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 675 transitions, 12301 flow [2024-06-04 16:09:03,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:09:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:09:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 16:09:03,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-04 16:09:03,339 INFO L175 Difference]: Start difference. First operand has 526 places, 644 transitions, 10591 flow. Second operand 7 states and 172 transitions. [2024-06-04 16:09:03,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 675 transitions, 12301 flow [2024-06-04 16:09:07,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 675 transitions, 12088 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 16:09:07,799 INFO L231 Difference]: Finished difference. Result has 527 places, 644 transitions, 10596 flow [2024-06-04 16:09:07,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10380, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10596, PETRI_PLACES=527, PETRI_TRANSITIONS=644} [2024-06-04 16:09:07,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-04 16:09:07,800 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 644 transitions, 10596 flow [2024-06-04 16:09:07,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:07,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:07,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:07,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-04 16:09:07,800 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:07,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:07,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1990942815, now seen corresponding path program 11 times [2024-06-04 16:09:07,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:07,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401049618] [2024-06-04 16:09:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:07,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:08,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:08,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401049618] [2024-06-04 16:09:08,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401049618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:08,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:08,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:08,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100755646] [2024-06-04 16:09:08,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:08,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:08,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:08,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:08,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:08,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:08,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 644 transitions, 10596 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:08,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:08,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:08,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:09,521 INFO L124 PetriNetUnfolderBase]: 2994/5032 cut-off events. [2024-06-04 16:09:09,521 INFO L125 PetriNetUnfolderBase]: For 638827/638827 co-relation queries the response was YES. [2024-06-04 16:09:09,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40959 conditions, 5032 events. 2994/5032 cut-off events. For 638827/638827 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 33188 event pairs, 368 based on Foata normal form. 6/5037 useless extension candidates. Maximal degree in co-relation 40739. Up to 3831 conditions per place. [2024-06-04 16:09:09,596 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 555 selfloop transitions, 112 changer transitions 0/673 dead transitions. [2024-06-04 16:09:09,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 673 transitions, 12310 flow [2024-06-04 16:09:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:09:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:09:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 16:09:09,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-04 16:09:09,597 INFO L175 Difference]: Start difference. First operand has 527 places, 644 transitions, 10596 flow. Second operand 8 states and 185 transitions. [2024-06-04 16:09:09,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 673 transitions, 12310 flow [2024-06-04 16:09:14,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 673 transitions, 12111 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-04 16:09:14,198 INFO L231 Difference]: Finished difference. Result has 528 places, 644 transitions, 10631 flow [2024-06-04 16:09:14,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10401, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10631, PETRI_PLACES=528, PETRI_TRANSITIONS=644} [2024-06-04 16:09:14,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 486 predicate places. [2024-06-04 16:09:14,208 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 644 transitions, 10631 flow [2024-06-04 16:09:14,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:14,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:14,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:14,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-04 16:09:14,208 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:14,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:14,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2037421299, now seen corresponding path program 11 times [2024-06-04 16:09:14,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:14,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135967881] [2024-06-04 16:09:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:14,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:14,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:14,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135967881] [2024-06-04 16:09:14,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135967881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:14,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:14,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:14,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758790591] [2024-06-04 16:09:14,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:14,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:14,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:14,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:14,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:14,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:14,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 644 transitions, 10631 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:14,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:14,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:14,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:16,031 INFO L124 PetriNetUnfolderBase]: 2981/5013 cut-off events. [2024-06-04 16:09:16,031 INFO L125 PetriNetUnfolderBase]: For 586699/586699 co-relation queries the response was YES. [2024-06-04 16:09:16,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40113 conditions, 5013 events. 2981/5013 cut-off events. For 586699/586699 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 33081 event pairs, 353 based on Foata normal form. 6/5018 useless extension candidates. Maximal degree in co-relation 39894. Up to 3820 conditions per place. [2024-06-04 16:09:16,120 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 563 selfloop transitions, 111 changer transitions 0/680 dead transitions. [2024-06-04 16:09:16,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 680 transitions, 12361 flow [2024-06-04 16:09:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:09:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:09:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 16:09:16,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-04 16:09:16,121 INFO L175 Difference]: Start difference. First operand has 528 places, 644 transitions, 10631 flow. Second operand 8 states and 194 transitions. [2024-06-04 16:09:16,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 680 transitions, 12361 flow [2024-06-04 16:09:21,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 680 transitions, 12091 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 16:09:21,225 INFO L231 Difference]: Finished difference. Result has 528 places, 644 transitions, 10591 flow [2024-06-04 16:09:21,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10363, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10591, PETRI_PLACES=528, PETRI_TRANSITIONS=644} [2024-06-04 16:09:21,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 486 predicate places. [2024-06-04 16:09:21,226 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 644 transitions, 10591 flow [2024-06-04 16:09:21,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:21,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:21,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:21,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-04 16:09:21,226 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:21,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:21,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1674386625, now seen corresponding path program 12 times [2024-06-04 16:09:21,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:21,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54359966] [2024-06-04 16:09:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:21,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:21,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:21,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54359966] [2024-06-04 16:09:21,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54359966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:21,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:21,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:21,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561810637] [2024-06-04 16:09:21,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:21,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:21,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:21,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:21,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:21,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:21,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 644 transitions, 10591 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:21,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:21,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:21,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:23,031 INFO L124 PetriNetUnfolderBase]: 2963/4985 cut-off events. [2024-06-04 16:09:23,031 INFO L125 PetriNetUnfolderBase]: For 540890/540890 co-relation queries the response was YES. [2024-06-04 16:09:23,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38689 conditions, 4985 events. 2963/4985 cut-off events. For 540890/540890 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 32907 event pairs, 581 based on Foata normal form. 8/4992 useless extension candidates. Maximal degree in co-relation 38470. Up to 4381 conditions per place. [2024-06-04 16:09:23,120 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 582 selfloop transitions, 75 changer transitions 0/663 dead transitions. [2024-06-04 16:09:23,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 663 transitions, 11985 flow [2024-06-04 16:09:23,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:09:23,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:09:23,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-04 16:09:23,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-04 16:09:23,121 INFO L175 Difference]: Start difference. First operand has 528 places, 644 transitions, 10591 flow. Second operand 8 states and 178 transitions. [2024-06-04 16:09:23,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 663 transitions, 11985 flow [2024-06-04 16:09:27,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 663 transitions, 11781 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 16:09:27,127 INFO L231 Difference]: Finished difference. Result has 529 places, 644 transitions, 10548 flow [2024-06-04 16:09:27,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10387, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10548, PETRI_PLACES=529, PETRI_TRANSITIONS=644} [2024-06-04 16:09:27,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 487 predicate places. [2024-06-04 16:09:27,128 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 644 transitions, 10548 flow [2024-06-04 16:09:27,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:27,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:27,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:27,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-04 16:09:27,129 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:27,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:27,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1902466521, now seen corresponding path program 12 times [2024-06-04 16:09:27,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:27,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264751052] [2024-06-04 16:09:27,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:27,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:27,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:27,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264751052] [2024-06-04 16:09:27,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264751052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:27,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:27,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:27,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904144687] [2024-06-04 16:09:27,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:27,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:27,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:27,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:27,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:27,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:27,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 644 transitions, 10548 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:27,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:27,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:27,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:28,670 INFO L124 PetriNetUnfolderBase]: 2945/4961 cut-off events. [2024-06-04 16:09:28,671 INFO L125 PetriNetUnfolderBase]: For 479630/479630 co-relation queries the response was YES. [2024-06-04 16:09:28,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37264 conditions, 4961 events. 2945/4961 cut-off events. For 479630/479630 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 32822 event pairs, 506 based on Foata normal form. 8/4968 useless extension candidates. Maximal degree in co-relation 37045. Up to 4093 conditions per place. [2024-06-04 16:09:28,751 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 566 selfloop transitions, 95 changer transitions 0/667 dead transitions. [2024-06-04 16:09:28,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 667 transitions, 11962 flow [2024-06-04 16:09:28,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:09:28,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:09:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:09:28,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-04 16:09:28,752 INFO L175 Difference]: Start difference. First operand has 529 places, 644 transitions, 10548 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:09:28,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 667 transitions, 11962 flow [2024-06-04 16:09:31,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 667 transitions, 11772 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:09:31,726 INFO L231 Difference]: Finished difference. Result has 528 places, 644 transitions, 10580 flow [2024-06-04 16:09:31,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10358, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10580, PETRI_PLACES=528, PETRI_TRANSITIONS=644} [2024-06-04 16:09:31,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 486 predicate places. [2024-06-04 16:09:31,726 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 644 transitions, 10580 flow [2024-06-04 16:09:31,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:31,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:31,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:31,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-04 16:09:31,727 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:31,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:31,727 INFO L85 PathProgramCache]: Analyzing trace with hash -353249839, now seen corresponding path program 13 times [2024-06-04 16:09:31,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:31,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397392891] [2024-06-04 16:09:31,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:31,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:32,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:32,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397392891] [2024-06-04 16:09:32,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397392891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:32,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:32,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:32,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925763824] [2024-06-04 16:09:32,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:32,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:32,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:32,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:32,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:32,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:32,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 644 transitions, 10580 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:32,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:32,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:32,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:33,345 INFO L124 PetriNetUnfolderBase]: 3019/5075 cut-off events. [2024-06-04 16:09:33,346 INFO L125 PetriNetUnfolderBase]: For 541210/541210 co-relation queries the response was YES. [2024-06-04 16:09:33,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39146 conditions, 5075 events. 3019/5075 cut-off events. For 541210/541210 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 33613 event pairs, 589 based on Foata normal form. 8/5082 useless extension candidates. Maximal degree in co-relation 38926. Up to 4130 conditions per place. [2024-06-04 16:09:33,426 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 540 selfloop transitions, 133 changer transitions 0/679 dead transitions. [2024-06-04 16:09:33,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 679 transitions, 12364 flow [2024-06-04 16:09:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:09:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:09:33,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:09:33,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-04 16:09:33,427 INFO L175 Difference]: Start difference. First operand has 528 places, 644 transitions, 10580 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:09:33,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 679 transitions, 12364 flow [2024-06-04 16:09:37,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 679 transitions, 12083 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:09:37,122 INFO L231 Difference]: Finished difference. Result has 528 places, 646 transitions, 10621 flow [2024-06-04 16:09:37,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10305, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10621, PETRI_PLACES=528, PETRI_TRANSITIONS=646} [2024-06-04 16:09:37,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 486 predicate places. [2024-06-04 16:09:37,123 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 646 transitions, 10621 flow [2024-06-04 16:09:37,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:37,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:37,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:37,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-04 16:09:37,124 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:37,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:37,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1510500465, now seen corresponding path program 14 times [2024-06-04 16:09:37,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:37,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793255492] [2024-06-04 16:09:37,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:37,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:37,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:37,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793255492] [2024-06-04 16:09:37,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793255492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:37,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:37,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:37,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365547960] [2024-06-04 16:09:37,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:37,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:37,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:37,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:37,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:37,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:37,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 646 transitions, 10621 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:37,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:37,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:37,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:38,614 INFO L124 PetriNetUnfolderBase]: 3047/5119 cut-off events. [2024-06-04 16:09:38,614 INFO L125 PetriNetUnfolderBase]: For 525291/525291 co-relation queries the response was YES. [2024-06-04 16:09:38,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39334 conditions, 5119 events. 3047/5119 cut-off events. For 525291/525291 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 33936 event pairs, 609 based on Foata normal form. 8/5126 useless extension candidates. Maximal degree in co-relation 39115. Up to 4358 conditions per place. [2024-06-04 16:09:38,697 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 533 selfloop transitions, 133 changer transitions 0/672 dead transitions. [2024-06-04 16:09:38,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 672 transitions, 12073 flow [2024-06-04 16:09:38,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:09:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:09:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-04 16:09:38,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:09:38,698 INFO L175 Difference]: Start difference. First operand has 528 places, 646 transitions, 10621 flow. Second operand 8 states and 180 transitions. [2024-06-04 16:09:38,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 672 transitions, 12073 flow [2024-06-04 16:09:42,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 672 transitions, 11888 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-04 16:09:42,380 INFO L231 Difference]: Finished difference. Result has 532 places, 647 transitions, 10733 flow [2024-06-04 16:09:42,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10442, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10733, PETRI_PLACES=532, PETRI_TRANSITIONS=647} [2024-06-04 16:09:42,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 490 predicate places. [2024-06-04 16:09:42,380 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 647 transitions, 10733 flow [2024-06-04 16:09:42,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:42,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:42,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:42,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-04 16:09:42,381 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:42,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:42,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1917616067, now seen corresponding path program 15 times [2024-06-04 16:09:42,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:42,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97808391] [2024-06-04 16:09:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:42,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:42,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:42,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97808391] [2024-06-04 16:09:42,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97808391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:42,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:42,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:42,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392427892] [2024-06-04 16:09:42,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:42,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:42,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:42,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:42,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:42,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:42,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 647 transitions, 10733 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:42,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:42,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:42,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:43,895 INFO L124 PetriNetUnfolderBase]: 3121/5233 cut-off events. [2024-06-04 16:09:43,895 INFO L125 PetriNetUnfolderBase]: For 592778/592778 co-relation queries the response was YES. [2024-06-04 16:09:43,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41310 conditions, 5233 events. 3121/5233 cut-off events. For 592778/592778 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 34781 event pairs, 621 based on Foata normal form. 8/5240 useless extension candidates. Maximal degree in co-relation 41089. Up to 4306 conditions per place. [2024-06-04 16:09:43,982 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 549 selfloop transitions, 127 changer transitions 0/682 dead transitions. [2024-06-04 16:09:43,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 682 transitions, 12525 flow [2024-06-04 16:09:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:09:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:09:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:09:43,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-04 16:09:43,983 INFO L175 Difference]: Start difference. First operand has 532 places, 647 transitions, 10733 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:09:43,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 682 transitions, 12525 flow [2024-06-04 16:09:48,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 682 transitions, 12258 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:09:48,890 INFO L231 Difference]: Finished difference. Result has 534 places, 649 transitions, 10774 flow [2024-06-04 16:09:48,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10466, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10774, PETRI_PLACES=534, PETRI_TRANSITIONS=649} [2024-06-04 16:09:48,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 492 predicate places. [2024-06-04 16:09:48,891 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 649 transitions, 10774 flow [2024-06-04 16:09:48,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:48,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:48,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:48,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-04 16:09:48,891 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:48,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:48,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1211290713, now seen corresponding path program 16 times [2024-06-04 16:09:48,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:48,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519583282] [2024-06-04 16:09:48,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:48,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:49,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:49,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519583282] [2024-06-04 16:09:49,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519583282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:49,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:49,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:49,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501964635] [2024-06-04 16:09:49,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:49,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:49,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:49,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:49,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:49,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:49,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 649 transitions, 10774 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:49,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:49,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:49,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:50,411 INFO L124 PetriNetUnfolderBase]: 3149/5277 cut-off events. [2024-06-04 16:09:50,411 INFO L125 PetriNetUnfolderBase]: For 603515/603515 co-relation queries the response was YES. [2024-06-04 16:09:50,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41759 conditions, 5277 events. 3149/5277 cut-off events. For 603515/603515 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 35108 event pairs, 641 based on Foata normal form. 8/5284 useless extension candidates. Maximal degree in co-relation 41537. Up to 4516 conditions per place. [2024-06-04 16:09:50,505 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 543 selfloop transitions, 126 changer transitions 0/675 dead transitions. [2024-06-04 16:09:50,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 675 transitions, 12234 flow [2024-06-04 16:09:50,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:09:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:09:50,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-04 16:09:50,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:09:50,506 INFO L175 Difference]: Start difference. First operand has 534 places, 649 transitions, 10774 flow. Second operand 8 states and 180 transitions. [2024-06-04 16:09:50,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 675 transitions, 12234 flow [2024-06-04 16:09:54,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 675 transitions, 12055 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 16:09:54,734 INFO L231 Difference]: Finished difference. Result has 538 places, 650 transitions, 10880 flow [2024-06-04 16:09:54,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10603, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10880, PETRI_PLACES=538, PETRI_TRANSITIONS=650} [2024-06-04 16:09:54,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 496 predicate places. [2024-06-04 16:09:54,734 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 650 transitions, 10880 flow [2024-06-04 16:09:54,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:54,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:54,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:54,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-04 16:09:54,734 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:54,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:54,735 INFO L85 PathProgramCache]: Analyzing trace with hash -57791629, now seen corresponding path program 17 times [2024-06-04 16:09:54,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:54,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913510942] [2024-06-04 16:09:54,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:54,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:55,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:55,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913510942] [2024-06-04 16:09:55,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913510942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:55,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:55,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:55,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008515736] [2024-06-04 16:09:55,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:55,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:55,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:55,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:55,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:55,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:55,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 650 transitions, 10880 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:55,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:55,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:55,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:56,379 INFO L124 PetriNetUnfolderBase]: 3177/5321 cut-off events. [2024-06-04 16:09:56,379 INFO L125 PetriNetUnfolderBase]: For 611394/611394 co-relation queries the response was YES. [2024-06-04 16:09:56,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42173 conditions, 5321 events. 3177/5321 cut-off events. For 611394/611394 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 35489 event pairs, 645 based on Foata normal form. 8/5328 useless extension candidates. Maximal degree in co-relation 41949. Up to 4560 conditions per place. [2024-06-04 16:09:56,471 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 537 selfloop transitions, 130 changer transitions 0/673 dead transitions. [2024-06-04 16:09:56,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 673 transitions, 12322 flow [2024-06-04 16:09:56,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:09:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:09:56,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-04 16:09:56,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-04 16:09:56,473 INFO L175 Difference]: Start difference. First operand has 538 places, 650 transitions, 10880 flow. Second operand 8 states and 178 transitions. [2024-06-04 16:09:56,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 673 transitions, 12322 flow [2024-06-04 16:10:01,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 673 transitions, 12069 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:10:01,587 INFO L231 Difference]: Finished difference. Result has 540 places, 651 transitions, 10914 flow [2024-06-04 16:10:01,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10627, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10914, PETRI_PLACES=540, PETRI_TRANSITIONS=651} [2024-06-04 16:10:01,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 498 predicate places. [2024-06-04 16:10:01,588 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 651 transitions, 10914 flow [2024-06-04 16:10:01,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:01,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:01,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:01,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-04 16:10:01,588 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:01,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:01,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1353632793, now seen corresponding path program 18 times [2024-06-04 16:10:01,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:01,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693292552] [2024-06-04 16:10:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:01,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:01,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:01,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693292552] [2024-06-04 16:10:01,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693292552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:01,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:01,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:01,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688344084] [2024-06-04 16:10:01,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:01,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:01,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:01,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:01,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:01,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:10:01,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 651 transitions, 10914 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:01,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:01,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:10:01,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:03,428 INFO L124 PetriNetUnfolderBase]: 3217/5387 cut-off events. [2024-06-04 16:10:03,428 INFO L125 PetriNetUnfolderBase]: For 637965/637965 co-relation queries the response was YES. [2024-06-04 16:10:03,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43203 conditions, 5387 events. 3217/5387 cut-off events. For 637965/637965 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 35898 event pairs, 629 based on Foata normal form. 6/5390 useless extension candidates. Maximal degree in co-relation 42978. Up to 3988 conditions per place. [2024-06-04 16:10:03,515 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 550 selfloop transitions, 133 changer transitions 0/689 dead transitions. [2024-06-04 16:10:03,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 689 transitions, 12980 flow [2024-06-04 16:10:03,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:10:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:10:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:10:03,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-04 16:10:03,516 INFO L175 Difference]: Start difference. First operand has 540 places, 651 transitions, 10914 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:10:03,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 689 transitions, 12980 flow [2024-06-04 16:10:08,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 689 transitions, 12717 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 16:10:08,489 INFO L231 Difference]: Finished difference. Result has 542 places, 653 transitions, 10975 flow [2024-06-04 16:10:08,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10651, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10975, PETRI_PLACES=542, PETRI_TRANSITIONS=653} [2024-06-04 16:10:08,490 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 500 predicate places. [2024-06-04 16:10:08,490 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 653 transitions, 10975 flow [2024-06-04 16:10:08,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:08,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:08,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:08,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-04 16:10:08,490 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:08,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:08,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1353512823, now seen corresponding path program 19 times [2024-06-04 16:10:08,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:08,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193180033] [2024-06-04 16:10:08,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:08,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:08,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:08,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193180033] [2024-06-04 16:10:08,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193180033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:08,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:08,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:08,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213480322] [2024-06-04 16:10:08,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:08,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:08,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:08,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:08,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:08,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:10:08,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 653 transitions, 10975 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:08,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:08,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:10:08,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:10,294 INFO L124 PetriNetUnfolderBase]: 3245/5428 cut-off events. [2024-06-04 16:10:10,294 INFO L125 PetriNetUnfolderBase]: For 649620/649620 co-relation queries the response was YES. [2024-06-04 16:10:10,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43707 conditions, 5428 events. 3245/5428 cut-off events. For 649620/649620 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 36253 event pairs, 658 based on Foata normal form. 6/5424 useless extension candidates. Maximal degree in co-relation 43481. Up to 4801 conditions per place. [2024-06-04 16:10:10,398 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 617 selfloop transitions, 59 changer transitions 0/682 dead transitions. [2024-06-04 16:10:10,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 682 transitions, 12447 flow [2024-06-04 16:10:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:10:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:10:10,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-04 16:10:10,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-04 16:10:10,399 INFO L175 Difference]: Start difference. First operand has 542 places, 653 transitions, 10975 flow. Second operand 8 states and 177 transitions. [2024-06-04 16:10:10,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 682 transitions, 12447 flow [2024-06-04 16:10:15,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 682 transitions, 12043 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 16:10:15,973 INFO L231 Difference]: Finished difference. Result has 544 places, 656 transitions, 10737 flow [2024-06-04 16:10:15,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10583, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10737, PETRI_PLACES=544, PETRI_TRANSITIONS=656} [2024-06-04 16:10:15,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 502 predicate places. [2024-06-04 16:10:15,974 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 656 transitions, 10737 flow [2024-06-04 16:10:15,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:15,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:15,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:15,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-04 16:10:15,974 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:15,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:15,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1353512637, now seen corresponding path program 13 times [2024-06-04 16:10:15,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:15,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136958196] [2024-06-04 16:10:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:15,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:16,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:16,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136958196] [2024-06-04 16:10:16,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136958196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:16,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:16,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940174759] [2024-06-04 16:10:16,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:16,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:16,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:16,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:16,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:16,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:10:16,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 656 transitions, 10737 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:16,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:16,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:10:16,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:17,805 INFO L124 PetriNetUnfolderBase]: 3311/5534 cut-off events. [2024-06-04 16:10:17,806 INFO L125 PetriNetUnfolderBase]: For 720305/720305 co-relation queries the response was YES. [2024-06-04 16:10:17,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44894 conditions, 5534 events. 3311/5534 cut-off events. For 720305/720305 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 37106 event pairs, 676 based on Foata normal form. 6/5530 useless extension candidates. Maximal degree in co-relation 44668. Up to 4763 conditions per place. [2024-06-04 16:10:17,893 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 567 selfloop transitions, 118 changer transitions 0/691 dead transitions. [2024-06-04 16:10:17,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 691 transitions, 12551 flow [2024-06-04 16:10:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:10:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:10:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-04 16:10:17,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-04 16:10:17,894 INFO L175 Difference]: Start difference. First operand has 544 places, 656 transitions, 10737 flow. Second operand 11 states and 236 transitions. [2024-06-04 16:10:17,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 691 transitions, 12551 flow [2024-06-04 16:10:23,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 691 transitions, 12419 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:10:23,165 INFO L231 Difference]: Finished difference. Result has 550 places, 658 transitions, 10911 flow [2024-06-04 16:10:23,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10605, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10911, PETRI_PLACES=550, PETRI_TRANSITIONS=658} [2024-06-04 16:10:23,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 508 predicate places. [2024-06-04 16:10:23,165 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 658 transitions, 10911 flow [2024-06-04 16:10:23,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:23,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:23,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:23,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-04 16:10:23,165 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:23,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:23,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1087667673, now seen corresponding path program 20 times [2024-06-04 16:10:23,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:23,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529363611] [2024-06-04 16:10:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:23,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:23,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:23,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529363611] [2024-06-04 16:10:23,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529363611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:23,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:23,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:23,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532508071] [2024-06-04 16:10:23,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:23,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:23,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:23,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:23,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:23,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:10:23,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 658 transitions, 10911 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:23,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:23,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:10:23,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:25,037 INFO L124 PetriNetUnfolderBase]: 3339/5591 cut-off events. [2024-06-04 16:10:25,037 INFO L125 PetriNetUnfolderBase]: For 747894/747894 co-relation queries the response was YES. [2024-06-04 16:10:25,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45396 conditions, 5591 events. 3339/5591 cut-off events. For 747894/747894 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 37529 event pairs, 699 based on Foata normal form. 8/5598 useless extension candidates. Maximal degree in co-relation 45169. Up to 4972 conditions per place. [2024-06-04 16:10:25,131 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 618 selfloop transitions, 57 changer transitions 0/681 dead transitions. [2024-06-04 16:10:25,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 681 transitions, 12369 flow [2024-06-04 16:10:25,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:10:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:10:25,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-04 16:10:25,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-04 16:10:25,132 INFO L175 Difference]: Start difference. First operand has 550 places, 658 transitions, 10911 flow. Second operand 8 states and 174 transitions. [2024-06-04 16:10:25,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 681 transitions, 12369 flow [2024-06-04 16:10:31,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 681 transitions, 12191 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:10:31,791 INFO L231 Difference]: Finished difference. Result has 551 places, 659 transitions, 10874 flow [2024-06-04 16:10:31,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10733, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10874, PETRI_PLACES=551, PETRI_TRANSITIONS=659} [2024-06-04 16:10:31,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 509 predicate places. [2024-06-04 16:10:31,791 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 659 transitions, 10874 flow [2024-06-04 16:10:31,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:31,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:31,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:31,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-04 16:10:31,792 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:31,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:31,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1346103513, now seen corresponding path program 21 times [2024-06-04 16:10:31,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:31,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597921850] [2024-06-04 16:10:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:31,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:32,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:32,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597921850] [2024-06-04 16:10:32,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597921850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:32,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:32,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:32,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170142877] [2024-06-04 16:10:32,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:32,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:32,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:32,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:32,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:32,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:10:32,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 659 transitions, 10874 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:32,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:32,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:10:32,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:33,587 INFO L124 PetriNetUnfolderBase]: 3367/5637 cut-off events. [2024-06-04 16:10:33,587 INFO L125 PetriNetUnfolderBase]: For 740801/740801 co-relation queries the response was YES. [2024-06-04 16:10:33,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45635 conditions, 5637 events. 3367/5637 cut-off events. For 740801/740801 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 37928 event pairs, 697 based on Foata normal form. 6/5640 useless extension candidates. Maximal degree in co-relation 45406. Up to 4986 conditions per place. [2024-06-04 16:10:33,684 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 622 selfloop transitions, 60 changer transitions 0/688 dead transitions. [2024-06-04 16:10:33,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 688 transitions, 12384 flow [2024-06-04 16:10:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:10:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:10:33,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-04 16:10:33,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-04 16:10:33,686 INFO L175 Difference]: Start difference. First operand has 551 places, 659 transitions, 10874 flow. Second operand 9 states and 193 transitions. [2024-06-04 16:10:33,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 688 transitions, 12384 flow [2024-06-04 16:10:40,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 688 transitions, 12267 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 16:10:40,180 INFO L231 Difference]: Finished difference. Result has 555 places, 662 transitions, 10927 flow [2024-06-04 16:10:40,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10757, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10927, PETRI_PLACES=555, PETRI_TRANSITIONS=662} [2024-06-04 16:10:40,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 513 predicate places. [2024-06-04 16:10:40,181 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 662 transitions, 10927 flow [2024-06-04 16:10:40,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:40,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:40,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:40,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-04 16:10:40,181 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:40,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:40,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1087815357, now seen corresponding path program 14 times [2024-06-04 16:10:40,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:40,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999067935] [2024-06-04 16:10:40,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:40,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:40,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:40,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999067935] [2024-06-04 16:10:40,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999067935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:40,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:40,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:40,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987784104] [2024-06-04 16:10:40,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:40,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:40,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:40,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:40,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:40,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:10:40,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 662 transitions, 10927 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:40,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:40,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:10:40,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:42,088 INFO L124 PetriNetUnfolderBase]: 3433/5739 cut-off events. [2024-06-04 16:10:42,088 INFO L125 PetriNetUnfolderBase]: For 820543/820543 co-relation queries the response was YES. [2024-06-04 16:10:42,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47597 conditions, 5739 events. 3433/5739 cut-off events. For 820543/820543 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 38621 event pairs, 713 based on Foata normal form. 6/5742 useless extension candidates. Maximal degree in co-relation 47366. Up to 5007 conditions per place. [2024-06-04 16:10:42,188 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 572 selfloop transitions, 116 changer transitions 0/694 dead transitions. [2024-06-04 16:10:42,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 694 transitions, 12737 flow [2024-06-04 16:10:42,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:10:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:10:42,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-06-04 16:10:42,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-04 16:10:42,189 INFO L175 Difference]: Start difference. First operand has 555 places, 662 transitions, 10927 flow. Second operand 12 states and 249 transitions. [2024-06-04 16:10:42,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 694 transitions, 12737 flow [2024-06-04 16:10:49,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 694 transitions, 12611 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 16:10:49,665 INFO L231 Difference]: Finished difference. Result has 561 places, 664 transitions, 11095 flow [2024-06-04 16:10:49,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10801, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11095, PETRI_PLACES=561, PETRI_TRANSITIONS=664} [2024-06-04 16:10:49,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 519 predicate places. [2024-06-04 16:10:49,666 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 664 transitions, 11095 flow [2024-06-04 16:10:49,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:49,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:49,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:49,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-04 16:10:49,666 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:49,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:49,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1087488927, now seen corresponding path program 15 times [2024-06-04 16:10:49,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:49,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728462562] [2024-06-04 16:10:49,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:49,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:49,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:49,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728462562] [2024-06-04 16:10:49,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728462562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:49,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:49,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:49,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551014961] [2024-06-04 16:10:49,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:49,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:49,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:49,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:49,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:50,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:10:50,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 664 transitions, 11095 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:50,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:50,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:10:50,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:51,704 INFO L124 PetriNetUnfolderBase]: 3415/5715 cut-off events. [2024-06-04 16:10:51,704 INFO L125 PetriNetUnfolderBase]: For 782285/782285 co-relation queries the response was YES. [2024-06-04 16:10:51,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46536 conditions, 5715 events. 3415/5715 cut-off events. For 782285/782285 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 38467 event pairs, 713 based on Foata normal form. 8/5722 useless extension candidates. Maximal degree in co-relation 46304. Up to 5029 conditions per place. [2024-06-04 16:10:51,806 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 570 selfloop transitions, 113 changer transitions 0/689 dead transitions. [2024-06-04 16:10:51,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 689 transitions, 12555 flow [2024-06-04 16:10:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:10:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:10:51,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-04 16:10:51,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077605321507761 [2024-06-04 16:10:51,807 INFO L175 Difference]: Start difference. First operand has 561 places, 664 transitions, 11095 flow. Second operand 11 states and 229 transitions. [2024-06-04 16:10:51,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 689 transitions, 12555 flow [2024-06-04 16:10:59,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 689 transitions, 12378 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 16:10:59,429 INFO L231 Difference]: Finished difference. Result has 564 places, 664 transitions, 11149 flow [2024-06-04 16:10:59,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10918, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11149, PETRI_PLACES=564, PETRI_TRANSITIONS=664} [2024-06-04 16:10:59,429 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 522 predicate places. [2024-06-04 16:10:59,429 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 664 transitions, 11149 flow [2024-06-04 16:10:59,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:59,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:59,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:59,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-04 16:10:59,430 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:59,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:59,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1944554161, now seen corresponding path program 22 times [2024-06-04 16:10:59,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:59,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090840578] [2024-06-04 16:10:59,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:59,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:59,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:59,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090840578] [2024-06-04 16:10:59,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090840578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:59,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:59,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:59,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86831060] [2024-06-04 16:10:59,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:59,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:59,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:59,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:59,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:59,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:10:59,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 664 transitions, 11149 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:59,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:59,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:10:59,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:01,307 INFO L124 PetriNetUnfolderBase]: 3443/5759 cut-off events. [2024-06-04 16:11:01,307 INFO L125 PetriNetUnfolderBase]: For 792528/792528 co-relation queries the response was YES. [2024-06-04 16:11:01,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46943 conditions, 5759 events. 3443/5759 cut-off events. For 792528/792528 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 38856 event pairs, 717 based on Foata normal form. 8/5766 useless extension candidates. Maximal degree in co-relation 46709. Up to 5106 conditions per place. [2024-06-04 16:11:01,404 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 600 selfloop transitions, 78 changer transitions 0/684 dead transitions. [2024-06-04 16:11:01,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 684 transitions, 12607 flow [2024-06-04 16:11:01,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:11:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:11:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-04 16:11:01,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-04 16:11:01,405 INFO L175 Difference]: Start difference. First operand has 564 places, 664 transitions, 11149 flow. Second operand 8 states and 174 transitions. [2024-06-04 16:11:01,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 684 transitions, 12607 flow [2024-06-04 16:11:08,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 684 transitions, 12382 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-04 16:11:08,440 INFO L231 Difference]: Finished difference. Result has 563 places, 665 transitions, 11111 flow [2024-06-04 16:11:08,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10924, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11111, PETRI_PLACES=563, PETRI_TRANSITIONS=665} [2024-06-04 16:11:08,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 521 predicate places. [2024-06-04 16:11:08,440 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 665 transitions, 11111 flow [2024-06-04 16:11:08,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:08,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:08,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:08,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-04 16:11:08,440 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:11:08,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:08,441 INFO L85 PathProgramCache]: Analyzing trace with hash -783916289, now seen corresponding path program 16 times [2024-06-04 16:11:08,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:08,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824820251] [2024-06-04 16:11:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:08,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:08,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:08,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824820251] [2024-06-04 16:11:08,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824820251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:08,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:08,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:08,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986988884] [2024-06-04 16:11:08,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:08,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:08,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:08,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:08,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:08,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:11:08,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 665 transitions, 11111 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:08,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:08,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:11:08,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:10,419 INFO L124 PetriNetUnfolderBase]: 3471/5807 cut-off events. [2024-06-04 16:11:10,420 INFO L125 PetriNetUnfolderBase]: For 805472/805472 co-relation queries the response was YES. [2024-06-04 16:11:10,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47362 conditions, 5807 events. 3471/5807 cut-off events. For 805472/805472 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 39224 event pairs, 723 based on Foata normal form. 8/5814 useless extension candidates. Maximal degree in co-relation 47127. Up to 5117 conditions per place. [2024-06-04 16:11:10,515 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 573 selfloop transitions, 110 changer transitions 0/689 dead transitions. [2024-06-04 16:11:10,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 689 transitions, 12595 flow [2024-06-04 16:11:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:11:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:11:10,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-06-04 16:11:10,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 16:11:10,516 INFO L175 Difference]: Start difference. First operand has 563 places, 665 transitions, 11111 flow. Second operand 12 states and 246 transitions. [2024-06-04 16:11:10,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 689 transitions, 12595 flow [2024-06-04 16:11:17,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 689 transitions, 12436 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:11:17,400 INFO L231 Difference]: Finished difference. Result has 569 places, 666 transitions, 11209 flow [2024-06-04 16:11:17,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10952, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11209, PETRI_PLACES=569, PETRI_TRANSITIONS=666} [2024-06-04 16:11:17,400 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 527 predicate places. [2024-06-04 16:11:17,400 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 666 transitions, 11209 flow [2024-06-04 16:11:17,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:17,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:17,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:17,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-04 16:11:17,401 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:11:17,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:17,401 INFO L85 PathProgramCache]: Analyzing trace with hash -784095035, now seen corresponding path program 23 times [2024-06-04 16:11:17,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:17,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478188957] [2024-06-04 16:11:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:17,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:17,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:17,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478188957] [2024-06-04 16:11:17,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478188957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:17,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:17,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:17,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396337752] [2024-06-04 16:11:17,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:17,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:17,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:17,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:17,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:17,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:11:17,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 666 transitions, 11209 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:17,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:17,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:11:17,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:19,346 INFO L124 PetriNetUnfolderBase]: 3499/5851 cut-off events. [2024-06-04 16:11:19,346 INFO L125 PetriNetUnfolderBase]: For 818009/818009 co-relation queries the response was YES. [2024-06-04 16:11:19,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47809 conditions, 5851 events. 3499/5851 cut-off events. For 818009/818009 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 39528 event pairs, 727 based on Foata normal form. 8/5858 useless extension candidates. Maximal degree in co-relation 47573. Up to 5198 conditions per place. [2024-06-04 16:11:19,442 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 602 selfloop transitions, 80 changer transitions 0/688 dead transitions. [2024-06-04 16:11:19,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 688 transitions, 12679 flow [2024-06-04 16:11:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:11:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:11:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-04 16:11:19,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073170731707317 [2024-06-04 16:11:19,443 INFO L175 Difference]: Start difference. First operand has 569 places, 666 transitions, 11209 flow. Second operand 10 states and 208 transitions. [2024-06-04 16:11:19,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 688 transitions, 12679 flow [2024-06-04 16:11:25,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 688 transitions, 12446 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-04 16:11:25,362 INFO L231 Difference]: Finished difference. Result has 569 places, 667 transitions, 11165 flow [2024-06-04 16:11:25,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10976, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11165, PETRI_PLACES=569, PETRI_TRANSITIONS=667} [2024-06-04 16:11:25,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 527 predicate places. [2024-06-04 16:11:25,363 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 667 transitions, 11165 flow [2024-06-04 16:11:25,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:25,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:25,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:25,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-04 16:11:25,363 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:11:25,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:25,364 INFO L85 PathProgramCache]: Analyzing trace with hash -784242905, now seen corresponding path program 24 times [2024-06-04 16:11:25,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:25,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608067058] [2024-06-04 16:11:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:25,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:25,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:25,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608067058] [2024-06-04 16:11:25,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608067058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:25,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:25,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:25,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197946080] [2024-06-04 16:11:25,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:25,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:25,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:25,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:25,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:25,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:11:25,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 667 transitions, 11165 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:25,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:25,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:11:25,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:27,445 INFO L124 PetriNetUnfolderBase]: 3527/5895 cut-off events. [2024-06-04 16:11:27,446 INFO L125 PetriNetUnfolderBase]: For 810882/810882 co-relation queries the response was YES. [2024-06-04 16:11:27,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48016 conditions, 5895 events. 3527/5895 cut-off events. For 810882/810882 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 39887 event pairs, 725 based on Foata normal form. 6/5900 useless extension candidates. Maximal degree in co-relation 47779. Up to 5176 conditions per place. [2024-06-04 16:11:27,598 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 604 selfloop transitions, 84 changer transitions 0/694 dead transitions. [2024-06-04 16:11:27,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 694 transitions, 12687 flow [2024-06-04 16:11:27,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:11:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:11:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-04 16:11:27,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:11:27,599 INFO L175 Difference]: Start difference. First operand has 569 places, 667 transitions, 11165 flow. Second operand 10 states and 210 transitions. [2024-06-04 16:11:27,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 694 transitions, 12687 flow [2024-06-04 16:11:34,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 694 transitions, 12522 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:11:34,855 INFO L231 Difference]: Finished difference. Result has 572 places, 670 transitions, 11229 flow [2024-06-04 16:11:34,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11000, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11229, PETRI_PLACES=572, PETRI_TRANSITIONS=670} [2024-06-04 16:11:34,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 530 predicate places. [2024-06-04 16:11:34,856 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 670 transitions, 11229 flow [2024-06-04 16:11:34,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:34,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:34,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:34,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-04 16:11:34,857 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:11:34,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:34,857 INFO L85 PathProgramCache]: Analyzing trace with hash -773191529, now seen corresponding path program 17 times [2024-06-04 16:11:34,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:34,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687596202] [2024-06-04 16:11:34,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:34,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:35,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:35,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687596202] [2024-06-04 16:11:35,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687596202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:35,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:35,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:35,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160558278] [2024-06-04 16:11:35,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:35,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:35,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:35,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:35,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:35,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:11:35,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 670 transitions, 11229 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:35,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:35,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:11:35,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:36,858 INFO L124 PetriNetUnfolderBase]: 3555/5943 cut-off events. [2024-06-04 16:11:36,858 INFO L125 PetriNetUnfolderBase]: For 841392/841392 co-relation queries the response was YES. [2024-06-04 16:11:36,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48554 conditions, 5943 events. 3555/5943 cut-off events. For 841392/841392 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 40290 event pairs, 737 based on Foata normal form. 8/5950 useless extension candidates. Maximal degree in co-relation 48315. Up to 5249 conditions per place. [2024-06-04 16:11:36,955 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 578 selfloop transitions, 108 changer transitions 0/692 dead transitions. [2024-06-04 16:11:36,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 692 transitions, 12717 flow [2024-06-04 16:11:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:11:36,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:11:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-04 16:11:36,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-04 16:11:36,956 INFO L175 Difference]: Start difference. First operand has 572 places, 670 transitions, 11229 flow. Second operand 10 states and 212 transitions. [2024-06-04 16:11:36,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 692 transitions, 12717 flow [2024-06-04 16:11:44,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 692 transitions, 12542 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 16:11:44,421 INFO L231 Difference]: Finished difference. Result has 575 places, 671 transitions, 11309 flow [2024-06-04 16:11:44,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11054, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11309, PETRI_PLACES=575, PETRI_TRANSITIONS=671} [2024-06-04 16:11:44,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 533 predicate places. [2024-06-04 16:11:44,422 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 671 transitions, 11309 flow [2024-06-04 16:11:44,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:44,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:44,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:44,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-04 16:11:44,423 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:11:44,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:44,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1950064225, now seen corresponding path program 18 times [2024-06-04 16:11:44,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:44,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065192635] [2024-06-04 16:11:44,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:44,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:44,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:44,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065192635] [2024-06-04 16:11:44,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065192635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:44,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:44,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:44,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388836079] [2024-06-04 16:11:44,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:44,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:44,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:44,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:44,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:44,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:11:44,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 671 transitions, 11309 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:44,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:44,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:11:44,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:46,399 INFO L124 PetriNetUnfolderBase]: 3575/5973 cut-off events. [2024-06-04 16:11:46,399 INFO L125 PetriNetUnfolderBase]: For 837002/837002 co-relation queries the response was YES. [2024-06-04 16:11:46,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48901 conditions, 5973 events. 3575/5973 cut-off events. For 837002/837002 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 40480 event pairs, 733 based on Foata normal form. 6/5976 useless extension candidates. Maximal degree in co-relation 48661. Up to 5219 conditions per place. [2024-06-04 16:11:46,500 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 578 selfloop transitions, 114 changer transitions 0/698 dead transitions. [2024-06-04 16:11:46,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 698 transitions, 12837 flow [2024-06-04 16:11:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:11:46,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:11:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-04 16:11:46,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-04 16:11:46,501 INFO L175 Difference]: Start difference. First operand has 575 places, 671 transitions, 11309 flow. Second operand 12 states and 248 transitions. [2024-06-04 16:11:46,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 698 transitions, 12837 flow [2024-06-04 16:11:53,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 698 transitions, 12606 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 16:11:53,582 INFO L231 Difference]: Finished difference. Result has 579 places, 672 transitions, 11346 flow [2024-06-04 16:11:53,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11078, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11346, PETRI_PLACES=579, PETRI_TRANSITIONS=672} [2024-06-04 16:11:53,582 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 537 predicate places. [2024-06-04 16:11:53,583 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 672 transitions, 11346 flow [2024-06-04 16:11:53,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:53,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:53,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:53,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-04 16:11:53,583 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:11:53,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:53,583 INFO L85 PathProgramCache]: Analyzing trace with hash 197877595, now seen corresponding path program 19 times [2024-06-04 16:11:53,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:53,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354704958] [2024-06-04 16:11:53,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:53,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:53,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:53,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354704958] [2024-06-04 16:11:53,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354704958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:53,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:53,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:53,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500769029] [2024-06-04 16:11:53,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:53,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:53,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:53,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:53,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:11:53,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 672 transitions, 11346 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:53,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:53,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:11:53,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:55,498 INFO L124 PetriNetUnfolderBase]: 3603/6023 cut-off events. [2024-06-04 16:11:55,498 INFO L125 PetriNetUnfolderBase]: For 873545/873547 co-relation queries the response was YES. [2024-06-04 16:11:55,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49354 conditions, 6023 events. 3603/6023 cut-off events. For 873545/873547 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 40985 event pairs, 776 based on Foata normal form. 10/6032 useless extension candidates. Maximal degree in co-relation 49113. Up to 5325 conditions per place. [2024-06-04 16:11:55,599 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 586 selfloop transitions, 96 changer transitions 0/688 dead transitions. [2024-06-04 16:11:55,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 688 transitions, 12816 flow [2024-06-04 16:11:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:11:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:11:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-04 16:11:55,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-04 16:11:55,600 INFO L175 Difference]: Start difference. First operand has 579 places, 672 transitions, 11346 flow. Second operand 7 states and 153 transitions. [2024-06-04 16:11:55,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 688 transitions, 12816 flow [2024-06-04 16:12:02,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 688 transitions, 12575 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-04 16:12:02,385 INFO L231 Difference]: Finished difference. Result has 577 places, 673 transitions, 11340 flow [2024-06-04 16:12:02,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11105, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11340, PETRI_PLACES=577, PETRI_TRANSITIONS=673} [2024-06-04 16:12:02,386 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 535 predicate places. [2024-06-04 16:12:02,386 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 673 transitions, 11340 flow [2024-06-04 16:12:02,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:02,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:02,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:02,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-04 16:12:02,386 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:02,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:02,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1711973031, now seen corresponding path program 25 times [2024-06-04 16:12:02,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:02,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096011206] [2024-06-04 16:12:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:02,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:02,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:02,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096011206] [2024-06-04 16:12:02,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096011206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:02,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:02,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:02,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29014025] [2024-06-04 16:12:02,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:02,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:02,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:02,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:02,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:02,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:12:02,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 673 transitions, 11340 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:02,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:02,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:12:02,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:04,353 INFO L124 PetriNetUnfolderBase]: 3585/5993 cut-off events. [2024-06-04 16:12:04,353 INFO L125 PetriNetUnfolderBase]: For 804160/804160 co-relation queries the response was YES. [2024-06-04 16:12:04,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47986 conditions, 5993 events. 3585/5993 cut-off events. For 804160/804160 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 40762 event pairs, 725 based on Foata normal form. 8/6000 useless extension candidates. Maximal degree in co-relation 47744. Up to 5077 conditions per place. [2024-06-04 16:12:04,456 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 574 selfloop transitions, 128 changer transitions 0/708 dead transitions. [2024-06-04 16:12:04,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 708 transitions, 12866 flow [2024-06-04 16:12:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:12:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:12:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-04 16:12:04,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-04 16:12:04,457 INFO L175 Difference]: Start difference. First operand has 577 places, 673 transitions, 11340 flow. Second operand 9 states and 209 transitions. [2024-06-04 16:12:04,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 708 transitions, 12866 flow [2024-06-04 16:12:10,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 708 transitions, 12651 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 16:12:10,566 INFO L231 Difference]: Finished difference. Result has 581 places, 673 transitions, 11395 flow [2024-06-04 16:12:10,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11125, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11395, PETRI_PLACES=581, PETRI_TRANSITIONS=673} [2024-06-04 16:12:10,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 539 predicate places. [2024-06-04 16:12:10,567 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 673 transitions, 11395 flow [2024-06-04 16:12:10,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:10,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:10,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:10,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-04 16:12:10,567 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:10,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:10,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1722876537, now seen corresponding path program 20 times [2024-06-04 16:12:10,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:10,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143065160] [2024-06-04 16:12:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:10,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:10,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:10,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143065160] [2024-06-04 16:12:10,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143065160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:10,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:10,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:10,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927401906] [2024-06-04 16:12:10,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:10,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:10,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:10,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:10,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:10,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:12:10,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 673 transitions, 11395 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:10,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:10,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:12:10,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:12,502 INFO L124 PetriNetUnfolderBase]: 3613/6037 cut-off events. [2024-06-04 16:12:12,502 INFO L125 PetriNetUnfolderBase]: For 814765/814765 co-relation queries the response was YES. [2024-06-04 16:12:12,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48531 conditions, 6037 events. 3613/6037 cut-off events. For 814765/814765 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 41098 event pairs, 741 based on Foata normal form. 8/6044 useless extension candidates. Maximal degree in co-relation 48288. Up to 5311 conditions per place. [2024-06-04 16:12:12,604 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 582 selfloop transitions, 106 changer transitions 0/694 dead transitions. [2024-06-04 16:12:12,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 694 transitions, 12891 flow [2024-06-04 16:12:12,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:12:12,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:12:12,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-04 16:12:12,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-04 16:12:12,605 INFO L175 Difference]: Start difference. First operand has 581 places, 673 transitions, 11395 flow. Second operand 9 states and 193 transitions. [2024-06-04 16:12:12,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 694 transitions, 12891 flow [2024-06-04 16:12:20,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 694 transitions, 12621 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-04 16:12:20,518 INFO L231 Difference]: Finished difference. Result has 581 places, 674 transitions, 11385 flow [2024-06-04 16:12:20,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11125, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11385, PETRI_PLACES=581, PETRI_TRANSITIONS=674} [2024-06-04 16:12:20,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 539 predicate places. [2024-06-04 16:12:20,519 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 674 transitions, 11385 flow [2024-06-04 16:12:20,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:20,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:20,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:20,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-04 16:12:20,519 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:20,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:20,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1717335411, now seen corresponding path program 26 times [2024-06-04 16:12:20,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:20,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520249127] [2024-06-04 16:12:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:20,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:20,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:20,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520249127] [2024-06-04 16:12:20,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520249127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:20,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:20,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:20,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385683689] [2024-06-04 16:12:20,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:20,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:20,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:20,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:20,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:20,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:12:20,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 674 transitions, 11385 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:20,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:20,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:12:20,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:22,485 INFO L124 PetriNetUnfolderBase]: 3595/6011 cut-off events. [2024-06-04 16:12:22,485 INFO L125 PetriNetUnfolderBase]: For 719450/719450 co-relation queries the response was YES. [2024-06-04 16:12:22,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47016 conditions, 6011 events. 3595/6011 cut-off events. For 719450/719450 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 40955 event pairs, 721 based on Foata normal form. 8/6018 useless extension candidates. Maximal degree in co-relation 46773. Up to 5109 conditions per place. [2024-06-04 16:12:22,587 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 574 selfloop transitions, 121 changer transitions 0/701 dead transitions. [2024-06-04 16:12:22,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 701 transitions, 12877 flow [2024-06-04 16:12:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:12:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:12:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:12:22,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-04 16:12:22,588 INFO L175 Difference]: Start difference. First operand has 581 places, 674 transitions, 11385 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:12:22,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 701 transitions, 12877 flow [2024-06-04 16:12:27,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 701 transitions, 12641 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:12:27,717 INFO L231 Difference]: Finished difference. Result has 581 places, 674 transitions, 11408 flow [2024-06-04 16:12:27,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11149, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11408, PETRI_PLACES=581, PETRI_TRANSITIONS=674} [2024-06-04 16:12:27,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 539 predicate places. [2024-06-04 16:12:27,717 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 674 transitions, 11408 flow [2024-06-04 16:12:27,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:27,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:27,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:27,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-04 16:12:27,717 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:27,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:27,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1712151777, now seen corresponding path program 21 times [2024-06-04 16:12:27,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:27,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108087226] [2024-06-04 16:12:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:27,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:28,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:28,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108087226] [2024-06-04 16:12:28,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108087226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:28,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:28,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:28,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66044506] [2024-06-04 16:12:28,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:28,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:28,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:28,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:28,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:28,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:12:28,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 674 transitions, 11408 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:28,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:28,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:12:28,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:29,702 INFO L124 PetriNetUnfolderBase]: 3610/6040 cut-off events. [2024-06-04 16:12:29,703 INFO L125 PetriNetUnfolderBase]: For 700497/700497 co-relation queries the response was YES. [2024-06-04 16:12:29,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46902 conditions, 6040 events. 3610/6040 cut-off events. For 700497/700497 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 41155 event pairs, 738 based on Foata normal form. 8/6047 useless extension candidates. Maximal degree in co-relation 46658. Up to 5278 conditions per place. [2024-06-04 16:12:29,803 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 579 selfloop transitions, 114 changer transitions 0/699 dead transitions. [2024-06-04 16:12:29,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 699 transitions, 12924 flow [2024-06-04 16:12:29,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:12:29,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:12:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-04 16:12:29,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-04 16:12:29,805 INFO L175 Difference]: Start difference. First operand has 581 places, 674 transitions, 11408 flow. Second operand 10 states and 212 transitions. [2024-06-04 16:12:29,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 699 transitions, 12924 flow [2024-06-04 16:12:35,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 699 transitions, 12663 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:12:35,363 INFO L231 Difference]: Finished difference. Result has 584 places, 675 transitions, 11426 flow [2024-06-04 16:12:35,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11147, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11426, PETRI_PLACES=584, PETRI_TRANSITIONS=675} [2024-06-04 16:12:35,364 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 542 predicate places. [2024-06-04 16:12:35,364 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 675 transitions, 11426 flow [2024-06-04 16:12:35,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:35,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:35,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:35,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-04 16:12:35,364 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:35,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:35,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1711825347, now seen corresponding path program 22 times [2024-06-04 16:12:35,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:35,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118543538] [2024-06-04 16:12:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:35,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:35,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:35,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118543538] [2024-06-04 16:12:35,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118543538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:35,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:35,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:35,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81093369] [2024-06-04 16:12:35,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:35,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:35,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:35,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:35,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:12:35,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 675 transitions, 11426 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:35,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:35,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:12:35,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:37,406 INFO L124 PetriNetUnfolderBase]: 3597/6008 cut-off events. [2024-06-04 16:12:37,406 INFO L125 PetriNetUnfolderBase]: For 617305/617305 co-relation queries the response was YES. [2024-06-04 16:12:37,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45802 conditions, 6008 events. 3597/6008 cut-off events. For 617305/617305 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 40829 event pairs, 694 based on Foata normal form. 6/6000 useless extension candidates. Maximal degree in co-relation 45558. Up to 5023 conditions per place. [2024-06-04 16:12:37,508 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 569 selfloop transitions, 130 changer transitions 0/705 dead transitions. [2024-06-04 16:12:37,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 705 transitions, 12946 flow [2024-06-04 16:12:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:12:37,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:12:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-04 16:12:37,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-04 16:12:37,509 INFO L175 Difference]: Start difference. First operand has 584 places, 675 transitions, 11426 flow. Second operand 10 states and 218 transitions. [2024-06-04 16:12:37,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 705 transitions, 12946 flow [2024-06-04 16:12:42,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 705 transitions, 12686 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-04 16:12:42,981 INFO L231 Difference]: Finished difference. Result has 585 places, 675 transitions, 11436 flow [2024-06-04 16:12:42,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11166, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11436, PETRI_PLACES=585, PETRI_TRANSITIONS=675} [2024-06-04 16:12:42,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 543 predicate places. [2024-06-04 16:12:42,981 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 675 transitions, 11436 flow [2024-06-04 16:12:42,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:42,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:42,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:42,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-04 16:12:42,982 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:42,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:42,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1931074213, now seen corresponding path program 27 times [2024-06-04 16:12:42,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:42,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374271502] [2024-06-04 16:12:42,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:42,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:43,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:43,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374271502] [2024-06-04 16:12:43,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374271502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:43,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:43,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:43,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540073095] [2024-06-04 16:12:43,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:43,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:43,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:43,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:43,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:43,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:12:43,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 675 transitions, 11436 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:43,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:43,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:12:43,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:45,022 INFO L124 PetriNetUnfolderBase]: 3584/5996 cut-off events. [2024-06-04 16:12:45,022 INFO L125 PetriNetUnfolderBase]: For 552769/552769 co-relation queries the response was YES. [2024-06-04 16:12:45,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44763 conditions, 5996 events. 3584/5996 cut-off events. For 552769/552769 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 40918 event pairs, 649 based on Foata normal form. 6/5995 useless extension candidates. Maximal degree in co-relation 44519. Up to 4731 conditions per place. [2024-06-04 16:12:45,121 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 564 selfloop transitions, 143 changer transitions 0/713 dead transitions. [2024-06-04 16:12:45,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 713 transitions, 12994 flow [2024-06-04 16:12:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:12:45,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:12:45,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-04 16:12:45,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-04 16:12:45,122 INFO L175 Difference]: Start difference. First operand has 585 places, 675 transitions, 11436 flow. Second operand 9 states and 211 transitions. [2024-06-04 16:12:45,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 713 transitions, 12994 flow [2024-06-04 16:12:50,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 713 transitions, 12710 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-04 16:12:50,681 INFO L231 Difference]: Finished difference. Result has 584 places, 675 transitions, 11448 flow [2024-06-04 16:12:50,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11152, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11448, PETRI_PLACES=584, PETRI_TRANSITIONS=675} [2024-06-04 16:12:50,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 542 predicate places. [2024-06-04 16:12:50,682 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 675 transitions, 11448 flow [2024-06-04 16:12:50,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:50,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:50,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:50,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-04 16:12:50,682 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:50,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:50,682 INFO L85 PathProgramCache]: Analyzing trace with hash -765903577, now seen corresponding path program 1 times [2024-06-04 16:12:50,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:50,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366661557] [2024-06-04 16:12:50,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:50,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:50,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:50,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366661557] [2024-06-04 16:12:50,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366661557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:50,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:50,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:50,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115702432] [2024-06-04 16:12:50,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:50,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:50,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:50,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:50,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:51,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:12:51,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 675 transitions, 11448 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:51,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:51,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:12:51,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:52,716 INFO L124 PetriNetUnfolderBase]: 3604/6038 cut-off events. [2024-06-04 16:12:52,717 INFO L125 PetriNetUnfolderBase]: For 536576/536576 co-relation queries the response was YES. [2024-06-04 16:12:52,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44903 conditions, 6038 events. 3604/6038 cut-off events. For 536576/536576 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 41101 event pairs, 650 based on Foata normal form. 6/6043 useless extension candidates. Maximal degree in co-relation 44660. Up to 4211 conditions per place. [2024-06-04 16:12:52,813 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 556 selfloop transitions, 149 changer transitions 0/711 dead transitions. [2024-06-04 16:12:52,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 711 transitions, 13306 flow [2024-06-04 16:12:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:12:52,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:12:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:12:52,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-04 16:12:52,814 INFO L175 Difference]: Start difference. First operand has 584 places, 675 transitions, 11448 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:12:52,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 711 transitions, 13306 flow [2024-06-04 16:12:57,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 711 transitions, 13002 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-04 16:12:57,752 INFO L231 Difference]: Finished difference. Result has 583 places, 676 transitions, 11476 flow [2024-06-04 16:12:57,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11150, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11476, PETRI_PLACES=583, PETRI_TRANSITIONS=676} [2024-06-04 16:12:57,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 541 predicate places. [2024-06-04 16:12:57,753 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 676 transitions, 11476 flow [2024-06-04 16:12:57,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:57,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:57,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:57,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2024-06-04 16:12:57,753 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:57,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:57,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1311963321, now seen corresponding path program 1 times [2024-06-04 16:12:57,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:57,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270274279] [2024-06-04 16:12:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:57,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:58,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:58,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270274279] [2024-06-04 16:12:58,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270274279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:58,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:58,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:58,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800282981] [2024-06-04 16:12:58,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:58,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:58,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:58,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:58,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:58,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:12:58,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 676 transitions, 11476 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:58,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:58,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:12:58,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:59,790 INFO L124 PetriNetUnfolderBase]: 3719/6226 cut-off events. [2024-06-04 16:12:59,790 INFO L125 PetriNetUnfolderBase]: For 594824/594830 co-relation queries the response was YES. [2024-06-04 16:12:59,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47149 conditions, 6226 events. 3719/6226 cut-off events. For 594824/594830 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 42724 event pairs, 693 based on Foata normal form. 12/6238 useless extension candidates. Maximal degree in co-relation 46906. Up to 4983 conditions per place. [2024-06-04 16:12:59,904 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 536 selfloop transitions, 179 changer transitions 0/721 dead transitions. [2024-06-04 16:12:59,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 721 transitions, 13481 flow [2024-06-04 16:12:59,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:12:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:12:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-04 16:12:59,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254988913525499 [2024-06-04 16:12:59,905 INFO L175 Difference]: Start difference. First operand has 583 places, 676 transitions, 11476 flow. Second operand 11 states and 237 transitions. [2024-06-04 16:12:59,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 721 transitions, 13481 flow [2024-06-04 16:13:05,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 721 transitions, 12984 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-04 16:13:05,594 INFO L231 Difference]: Finished difference. Result has 589 places, 685 transitions, 11593 flow [2024-06-04 16:13:05,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11001, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11593, PETRI_PLACES=589, PETRI_TRANSITIONS=685} [2024-06-04 16:13:05,595 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 547 predicate places. [2024-06-04 16:13:05,595 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 685 transitions, 11593 flow [2024-06-04 16:13:05,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:05,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:05,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:05,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2024-06-04 16:13:05,595 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:05,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:05,596 INFO L85 PathProgramCache]: Analyzing trace with hash -146142187, now seen corresponding path program 2 times [2024-06-04 16:13:05,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:05,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257077385] [2024-06-04 16:13:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:05,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:05,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:05,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257077385] [2024-06-04 16:13:05,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257077385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:05,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:05,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:05,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272918247] [2024-06-04 16:13:05,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:05,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:05,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:05,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:05,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:05,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:13:05,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 685 transitions, 11593 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:05,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:05,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:13:05,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:07,455 INFO L124 PetriNetUnfolderBase]: 3739/6261 cut-off events. [2024-06-04 16:13:07,455 INFO L125 PetriNetUnfolderBase]: For 600774/600774 co-relation queries the response was YES. [2024-06-04 16:13:07,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46723 conditions, 6261 events. 3739/6261 cut-off events. For 600774/600774 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 42825 event pairs, 649 based on Foata normal form. 6/6266 useless extension candidates. Maximal degree in co-relation 46479. Up to 4341 conditions per place. [2024-06-04 16:13:07,574 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 559 selfloop transitions, 154 changer transitions 0/719 dead transitions. [2024-06-04 16:13:07,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 719 transitions, 13466 flow [2024-06-04 16:13:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:13:07,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-04 16:13:07,575 INFO L175 Difference]: Start difference. First operand has 589 places, 685 transitions, 11593 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:13:07,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 719 transitions, 13466 flow [2024-06-04 16:13:12,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 719 transitions, 13238 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:13:12,805 INFO L231 Difference]: Finished difference. Result has 590 places, 686 transitions, 11695 flow [2024-06-04 16:13:12,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11367, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11695, PETRI_PLACES=590, PETRI_TRANSITIONS=686} [2024-06-04 16:13:12,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 548 predicate places. [2024-06-04 16:13:12,805 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 686 transitions, 11695 flow [2024-06-04 16:13:12,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:12,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:12,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:12,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2024-06-04 16:13:12,806 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:12,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:12,806 INFO L85 PathProgramCache]: Analyzing trace with hash -57572335, now seen corresponding path program 2 times [2024-06-04 16:13:12,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:12,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252200856] [2024-06-04 16:13:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:12,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:13,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:13,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252200856] [2024-06-04 16:13:13,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252200856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:13,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:13,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:13,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979708316] [2024-06-04 16:13:13,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:13,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:13,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:13,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:13,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:13,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:13:13,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 686 transitions, 11695 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:13,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:13,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:13:13,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:14,777 INFO L124 PetriNetUnfolderBase]: 3767/6310 cut-off events. [2024-06-04 16:13:14,777 INFO L125 PetriNetUnfolderBase]: For 622625/622631 co-relation queries the response was YES. [2024-06-04 16:13:14,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47540 conditions, 6310 events. 3767/6310 cut-off events. For 622625/622631 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 43408 event pairs, 767 based on Foata normal form. 14/6324 useless extension candidates. Maximal degree in co-relation 47295. Up to 5521 conditions per place. [2024-06-04 16:13:14,892 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 546 selfloop transitions, 160 changer transitions 0/712 dead transitions. [2024-06-04 16:13:14,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 712 transitions, 13224 flow [2024-06-04 16:13:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:13:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:13:14,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-04 16:13:14,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099778270509978 [2024-06-04 16:13:14,893 INFO L175 Difference]: Start difference. First operand has 590 places, 686 transitions, 11695 flow. Second operand 11 states and 230 transitions. [2024-06-04 16:13:14,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 712 transitions, 13224 flow [2024-06-04 16:13:20,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 712 transitions, 12989 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:20,811 INFO L231 Difference]: Finished difference. Result has 596 places, 687 transitions, 11819 flow [2024-06-04 16:13:20,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11460, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11819, PETRI_PLACES=596, PETRI_TRANSITIONS=687} [2024-06-04 16:13:20,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 554 predicate places. [2024-06-04 16:13:20,811 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 687 transitions, 11819 flow [2024-06-04 16:13:20,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:20,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:20,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:20,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2024-06-04 16:13:20,812 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:20,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:20,812 INFO L85 PathProgramCache]: Analyzing trace with hash -57576427, now seen corresponding path program 3 times [2024-06-04 16:13:20,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:20,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184772959] [2024-06-04 16:13:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:20,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:21,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:21,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184772959] [2024-06-04 16:13:21,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184772959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:21,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:21,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:21,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028077719] [2024-06-04 16:13:21,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:21,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:21,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:21,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:21,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:13:21,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 687 transitions, 11819 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:21,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:21,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:13:21,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:22,781 INFO L124 PetriNetUnfolderBase]: 3787/6339 cut-off events. [2024-06-04 16:13:22,781 INFO L125 PetriNetUnfolderBase]: For 613182/613182 co-relation queries the response was YES. [2024-06-04 16:13:22,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47636 conditions, 6339 events. 3787/6339 cut-off events. For 613182/613182 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 43636 event pairs, 771 based on Foata normal form. 6/6340 useless extension candidates. Maximal degree in co-relation 47390. Up to 5380 conditions per place. [2024-06-04 16:13:22,902 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 571 selfloop transitions, 136 changer transitions 0/713 dead transitions. [2024-06-04 16:13:22,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 713 transitions, 13363 flow [2024-06-04 16:13:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:22,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-04 16:13:22,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-04 16:13:22,903 INFO L175 Difference]: Start difference. First operand has 596 places, 687 transitions, 11819 flow. Second operand 8 states and 181 transitions. [2024-06-04 16:13:22,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 713 transitions, 13363 flow [2024-06-04 16:13:28,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 713 transitions, 13037 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-04 16:13:28,914 INFO L231 Difference]: Finished difference. Result has 595 places, 688 transitions, 11788 flow [2024-06-04 16:13:28,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11493, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11788, PETRI_PLACES=595, PETRI_TRANSITIONS=688} [2024-06-04 16:13:28,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 553 predicate places. [2024-06-04 16:13:28,914 INFO L495 AbstractCegarLoop]: Abstraction has has 595 places, 688 transitions, 11788 flow [2024-06-04 16:13:28,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:28,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:28,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:28,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2024-06-04 16:13:28,914 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:28,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:28,915 INFO L85 PathProgramCache]: Analyzing trace with hash -57576055, now seen corresponding path program 3 times [2024-06-04 16:13:28,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:28,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797798127] [2024-06-04 16:13:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:28,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:29,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:29,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797798127] [2024-06-04 16:13:29,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797798127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:29,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:29,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:29,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170499060] [2024-06-04 16:13:29,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:29,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:29,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:29,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:29,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:29,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:13:29,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 688 transitions, 11788 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:29,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:29,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:13:29,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:30,977 INFO L124 PetriNetUnfolderBase]: 3807/6376 cut-off events. [2024-06-04 16:13:30,977 INFO L125 PetriNetUnfolderBase]: For 623262/623268 co-relation queries the response was YES. [2024-06-04 16:13:31,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47918 conditions, 6376 events. 3807/6376 cut-off events. For 623262/623268 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 43949 event pairs, 761 based on Foata normal form. 12/6388 useless extension candidates. Maximal degree in co-relation 47671. Up to 5523 conditions per place. [2024-06-04 16:13:31,096 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 547 selfloop transitions, 166 changer transitions 0/719 dead transitions. [2024-06-04 16:13:31,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 606 places, 719 transitions, 13368 flow [2024-06-04 16:13:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:13:31,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:13:31,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-06-04 16:13:31,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508130081300813 [2024-06-04 16:13:31,097 INFO L175 Difference]: Start difference. First operand has 595 places, 688 transitions, 11788 flow. Second operand 12 states and 250 transitions. [2024-06-04 16:13:31,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 606 places, 719 transitions, 13368 flow [2024-06-04 16:13:37,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 719 transitions, 13093 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:13:37,288 INFO L231 Difference]: Finished difference. Result has 602 places, 690 transitions, 11910 flow [2024-06-04 16:13:37,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11515, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11910, PETRI_PLACES=602, PETRI_TRANSITIONS=690} [2024-06-04 16:13:37,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 560 predicate places. [2024-06-04 16:13:37,289 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 690 transitions, 11910 flow [2024-06-04 16:13:37,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:37,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:37,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:37,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2024-06-04 16:13:37,289 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:37,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:37,289 INFO L85 PathProgramCache]: Analyzing trace with hash -773006831, now seen corresponding path program 4 times [2024-06-04 16:13:37,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:37,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047470809] [2024-06-04 16:13:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:37,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:37,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:37,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047470809] [2024-06-04 16:13:37,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047470809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:37,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:37,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:37,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946193365] [2024-06-04 16:13:37,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:37,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:37,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:37,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:37,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:37,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:13:37,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 690 transitions, 11910 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:37,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:37,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:13:37,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:39,383 INFO L124 PetriNetUnfolderBase]: 3835/6422 cut-off events. [2024-06-04 16:13:39,383 INFO L125 PetriNetUnfolderBase]: For 651071/651077 co-relation queries the response was YES. [2024-06-04 16:13:39,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48468 conditions, 6422 events. 3835/6422 cut-off events. For 651071/651077 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 44262 event pairs, 781 based on Foata normal form. 14/6436 useless extension candidates. Maximal degree in co-relation 48219. Up to 5732 conditions per place. [2024-06-04 16:13:39,497 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 616 selfloop transitions, 92 changer transitions 0/714 dead transitions. [2024-06-04 16:13:39,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 714 transitions, 13441 flow [2024-06-04 16:13:39,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:13:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:13:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-04 16:13:39,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-04 16:13:39,498 INFO L175 Difference]: Start difference. First operand has 602 places, 690 transitions, 11910 flow. Second operand 12 states and 244 transitions. [2024-06-04 16:13:39,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 714 transitions, 13441 flow [2024-06-04 16:13:45,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 714 transitions, 13102 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-04 16:13:45,884 INFO L231 Difference]: Finished difference. Result has 604 places, 691 transitions, 11798 flow [2024-06-04 16:13:45,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11571, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11798, PETRI_PLACES=604, PETRI_TRANSITIONS=691} [2024-06-04 16:13:45,884 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 562 predicate places. [2024-06-04 16:13:45,884 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 691 transitions, 11798 flow [2024-06-04 16:13:45,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:45,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:45,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:45,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2024-06-04 16:13:45,885 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:45,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:45,885 INFO L85 PathProgramCache]: Analyzing trace with hash -778369211, now seen corresponding path program 5 times [2024-06-04 16:13:45,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:45,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390739458] [2024-06-04 16:13:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:45,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:46,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:46,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390739458] [2024-06-04 16:13:46,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390739458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:46,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:46,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:46,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739776375] [2024-06-04 16:13:46,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:46,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:46,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:46,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:46,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:46,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:13:46,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 691 transitions, 11798 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:46,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:46,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:13:46,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:48,050 INFO L124 PetriNetUnfolderBase]: 3863/6470 cut-off events. [2024-06-04 16:13:48,051 INFO L125 PetriNetUnfolderBase]: For 652056/652062 co-relation queries the response was YES. [2024-06-04 16:13:48,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48629 conditions, 6470 events. 3863/6470 cut-off events. For 652056/652062 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 44714 event pairs, 787 based on Foata normal form. 14/6484 useless extension candidates. Maximal degree in co-relation 48380. Up to 5776 conditions per place. [2024-06-04 16:13:48,167 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 616 selfloop transitions, 92 changer transitions 0/714 dead transitions. [2024-06-04 16:13:48,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 714 transitions, 13329 flow [2024-06-04 16:13:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:13:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:13:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-04 16:13:48,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033259423503326 [2024-06-04 16:13:48,169 INFO L175 Difference]: Start difference. First operand has 604 places, 691 transitions, 11798 flow. Second operand 11 states and 227 transitions. [2024-06-04 16:13:48,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 714 transitions, 13329 flow [2024-06-04 16:13:55,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 714 transitions, 13167 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 16:13:55,067 INFO L231 Difference]: Finished difference. Result has 607 places, 692 transitions, 11865 flow [2024-06-04 16:13:55,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11636, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11865, PETRI_PLACES=607, PETRI_TRANSITIONS=692} [2024-06-04 16:13:55,068 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 565 predicate places. [2024-06-04 16:13:55,068 INFO L495 AbstractCegarLoop]: Abstraction has has 607 places, 692 transitions, 11865 flow [2024-06-04 16:13:55,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:55,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:55,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:55,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2024-06-04 16:13:55,068 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:55,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:55,069 INFO L85 PathProgramCache]: Analyzing trace with hash -778517453, now seen corresponding path program 4 times [2024-06-04 16:13:55,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:55,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916653783] [2024-06-04 16:13:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:55,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:55,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:55,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916653783] [2024-06-04 16:13:55,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916653783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:55,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:55,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:55,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574323191] [2024-06-04 16:13:55,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:55,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:55,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:55,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:55,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:55,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:13:55,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 692 transitions, 11865 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:55,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:55,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:13:55,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:57,126 INFO L124 PetriNetUnfolderBase]: 3883/6499 cut-off events. [2024-06-04 16:13:57,127 INFO L125 PetriNetUnfolderBase]: For 641190/641190 co-relation queries the response was YES. [2024-06-04 16:13:57,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48815 conditions, 6499 events. 3883/6499 cut-off events. For 641190/641190 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 44896 event pairs, 791 based on Foata normal form. 6/6500 useless extension candidates. Maximal degree in co-relation 48565. Up to 5658 conditions per place. [2024-06-04 16:13:57,244 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 626 selfloop transitions, 83 changer transitions 0/715 dead transitions. [2024-06-04 16:13:57,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 715 transitions, 13407 flow [2024-06-04 16:13:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:57,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-04 16:13:57,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-04 16:13:57,245 INFO L175 Difference]: Start difference. First operand has 607 places, 692 transitions, 11865 flow. Second operand 8 states and 177 transitions. [2024-06-04 16:13:57,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 715 transitions, 13407 flow [2024-06-04 16:14:03,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 715 transitions, 13211 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-04 16:14:03,381 INFO L231 Difference]: Finished difference. Result has 606 places, 693 transitions, 11860 flow [2024-06-04 16:14:03,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11669, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11860, PETRI_PLACES=606, PETRI_TRANSITIONS=693} [2024-06-04 16:14:03,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 564 predicate places. [2024-06-04 16:14:03,381 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 693 transitions, 11860 flow [2024-06-04 16:14:03,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:03,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:03,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:03,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2024-06-04 16:14:03,382 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:03,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:03,382 INFO L85 PathProgramCache]: Analyzing trace with hash -778517081, now seen corresponding path program 6 times [2024-06-04 16:14:03,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:03,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575337268] [2024-06-04 16:14:03,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:03,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:03,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:03,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575337268] [2024-06-04 16:14:03,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575337268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:03,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:03,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:03,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154319453] [2024-06-04 16:14:03,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:03,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:03,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:03,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:03,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:03,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:14:03,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 693 transitions, 11860 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:03,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:03,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:14:03,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:05,535 INFO L124 PetriNetUnfolderBase]: 3911/6548 cut-off events. [2024-06-04 16:14:05,535 INFO L125 PetriNetUnfolderBase]: For 651327/651333 co-relation queries the response was YES. [2024-06-04 16:14:05,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49176 conditions, 6548 events. 3911/6548 cut-off events. For 651327/651333 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 45296 event pairs, 781 based on Foata normal form. 12/6560 useless extension candidates. Maximal degree in co-relation 48925. Up to 5722 conditions per place. [2024-06-04 16:14:05,652 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 618 selfloop transitions, 97 changer transitions 0/721 dead transitions. [2024-06-04 16:14:05,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 721 transitions, 13465 flow [2024-06-04 16:14:05,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:14:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:14:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-04 16:14:05,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077605321507761 [2024-06-04 16:14:05,653 INFO L175 Difference]: Start difference. First operand has 606 places, 693 transitions, 11860 flow. Second operand 11 states and 229 transitions. [2024-06-04 16:14:05,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 721 transitions, 13465 flow [2024-06-04 16:14:12,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 721 transitions, 13293 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 16:14:12,087 INFO L231 Difference]: Finished difference. Result has 612 places, 696 transitions, 11988 flow [2024-06-04 16:14:12,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11691, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11988, PETRI_PLACES=612, PETRI_TRANSITIONS=696} [2024-06-04 16:14:12,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 570 predicate places. [2024-06-04 16:14:12,088 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 696 transitions, 11988 flow [2024-06-04 16:14:12,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:12,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:12,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:12,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2024-06-04 16:14:12,088 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:12,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:12,088 INFO L85 PathProgramCache]: Analyzing trace with hash -772791629, now seen corresponding path program 1 times [2024-06-04 16:14:12,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:12,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516120037] [2024-06-04 16:14:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:12,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:12,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:12,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516120037] [2024-06-04 16:14:12,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516120037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:12,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:12,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:12,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030257242] [2024-06-04 16:14:12,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:12,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:12,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:12,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:12,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:14:12,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 696 transitions, 11988 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:12,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:12,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:14:12,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:14,256 INFO L124 PetriNetUnfolderBase]: 3931/6584 cut-off events. [2024-06-04 16:14:14,256 INFO L125 PetriNetUnfolderBase]: For 662411/662417 co-relation queries the response was YES. [2024-06-04 16:14:14,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49623 conditions, 6584 events. 3931/6584 cut-off events. For 662411/662417 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 45565 event pairs, 787 based on Foata normal form. 12/6596 useless extension candidates. Maximal degree in co-relation 49370. Up to 5746 conditions per place. [2024-06-04 16:14:14,376 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 615 selfloop transitions, 102 changer transitions 0/723 dead transitions. [2024-06-04 16:14:14,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 723 transitions, 13556 flow [2024-06-04 16:14:14,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:14:14,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:14:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-06-04 16:14:14,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 16:14:14,377 INFO L175 Difference]: Start difference. First operand has 612 places, 696 transitions, 11988 flow. Second operand 12 states and 246 transitions. [2024-06-04 16:14:14,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 723 transitions, 13556 flow [2024-06-04 16:14:20,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 723 transitions, 13361 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:20,993 INFO L231 Difference]: Finished difference. Result has 616 places, 697 transitions, 12034 flow [2024-06-04 16:14:20,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11793, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12034, PETRI_PLACES=616, PETRI_TRANSITIONS=697} [2024-06-04 16:14:20,993 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 574 predicate places. [2024-06-04 16:14:20,994 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 697 transitions, 12034 flow [2024-06-04 16:14:20,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:20,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:20,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:20,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2024-06-04 16:14:20,994 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:20,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:20,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1938613321, now seen corresponding path program 1 times [2024-06-04 16:14:20,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:20,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955483907] [2024-06-04 16:14:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:20,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:21,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:21,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955483907] [2024-06-04 16:14:21,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955483907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:21,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:21,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:21,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47952643] [2024-06-04 16:14:21,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:21,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:21,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:21,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:21,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:21,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:14:21,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 697 transitions, 12034 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:21,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:21,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:14:21,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:23,123 INFO L124 PetriNetUnfolderBase]: 3951/6615 cut-off events. [2024-06-04 16:14:23,123 INFO L125 PetriNetUnfolderBase]: For 669512/669512 co-relation queries the response was YES. [2024-06-04 16:14:23,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49911 conditions, 6615 events. 3951/6615 cut-off events. For 669512/669512 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 45855 event pairs, 805 based on Foata normal form. 6/6620 useless extension candidates. Maximal degree in co-relation 49657. Up to 5739 conditions per place. [2024-06-04 16:14:23,249 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 600 selfloop transitions, 116 changer transitions 0/722 dead transitions. [2024-06-04 16:14:23,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 722 transitions, 13610 flow [2024-06-04 16:14:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:14:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:14:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-04 16:14:23,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-04 16:14:23,250 INFO L175 Difference]: Start difference. First operand has 616 places, 697 transitions, 12034 flow. Second operand 10 states and 215 transitions. [2024-06-04 16:14:23,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 722 transitions, 13610 flow [2024-06-04 16:14:29,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 722 transitions, 13359 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-04 16:14:29,812 INFO L231 Difference]: Finished difference. Result has 614 places, 698 transitions, 12056 flow [2024-06-04 16:14:29,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11783, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12056, PETRI_PLACES=614, PETRI_TRANSITIONS=698} [2024-06-04 16:14:29,813 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 572 predicate places. [2024-06-04 16:14:29,813 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 698 transitions, 12056 flow [2024-06-04 16:14:29,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:29,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:29,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:29,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2024-06-04 16:14:29,814 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:29,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:29,814 INFO L85 PathProgramCache]: Analyzing trace with hash 198062293, now seen corresponding path program 7 times [2024-06-04 16:14:29,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:29,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634861644] [2024-06-04 16:14:29,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:29,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:30,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:30,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634861644] [2024-06-04 16:14:30,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634861644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:30,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:30,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:30,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737557366] [2024-06-04 16:14:30,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:30,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:30,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:30,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:30,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:30,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:14:30,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 698 transitions, 12056 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:30,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:30,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:14:30,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:32,052 INFO L124 PetriNetUnfolderBase]: 3979/6669 cut-off events. [2024-06-04 16:14:32,053 INFO L125 PetriNetUnfolderBase]: For 705206/705214 co-relation queries the response was YES. [2024-06-04 16:14:32,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50357 conditions, 6669 events. 3979/6669 cut-off events. For 705206/705214 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 46419 event pairs, 831 based on Foata normal form. 16/6685 useless extension candidates. Maximal degree in co-relation 50102. Up to 5904 conditions per place. [2024-06-04 16:14:32,181 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 587 selfloop transitions, 126 changer transitions 0/719 dead transitions. [2024-06-04 16:14:32,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 719 transitions, 13597 flow [2024-06-04 16:14:32,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:32,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:32,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-04 16:14:32,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-04 16:14:32,182 INFO L175 Difference]: Start difference. First operand has 614 places, 698 transitions, 12056 flow. Second operand 9 states and 192 transitions. [2024-06-04 16:14:32,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 719 transitions, 13597 flow [2024-06-04 16:14:38,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 719 transitions, 13342 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:38,715 INFO L231 Difference]: Finished difference. Result has 615 places, 699 transitions, 12100 flow [2024-06-04 16:14:38,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11801, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12100, PETRI_PLACES=615, PETRI_TRANSITIONS=699} [2024-06-04 16:14:38,716 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 573 predicate places. [2024-06-04 16:14:38,716 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 699 transitions, 12100 flow [2024-06-04 16:14:38,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:38,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:38,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:38,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2024-06-04 16:14:38,717 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:38,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:38,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1723061235, now seen corresponding path program 8 times [2024-06-04 16:14:38,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:38,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067492011] [2024-06-04 16:14:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:38,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:39,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:39,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067492011] [2024-06-04 16:14:39,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067492011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:39,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:39,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:39,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261310805] [2024-06-04 16:14:39,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:39,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:39,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:39,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:39,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:39,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:14:39,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 699 transitions, 12100 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:39,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:39,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:14:39,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:40,901 INFO L124 PetriNetUnfolderBase]: 4007/6710 cut-off events. [2024-06-04 16:14:40,902 INFO L125 PetriNetUnfolderBase]: For 711177/711183 co-relation queries the response was YES. [2024-06-04 16:14:41,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50750 conditions, 6710 events. 4007/6710 cut-off events. For 711177/711183 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 46685 event pairs, 817 based on Foata normal form. 14/6724 useless extension candidates. Maximal degree in co-relation 50494. Up to 5876 conditions per place. [2024-06-04 16:14:41,034 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 587 selfloop transitions, 132 changer transitions 0/725 dead transitions. [2024-06-04 16:14:41,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 725 transitions, 13667 flow [2024-06-04 16:14:41,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:14:41,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:14:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-04 16:14:41,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:14:41,035 INFO L175 Difference]: Start difference. First operand has 615 places, 699 transitions, 12100 flow. Second operand 11 states and 231 transitions. [2024-06-04 16:14:41,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 725 transitions, 13667 flow [2024-06-04 16:14:46,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 725 transitions, 13432 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 16:14:46,907 INFO L231 Difference]: Finished difference. Result has 620 places, 700 transitions, 12188 flow [2024-06-04 16:14:46,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11865, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12188, PETRI_PLACES=620, PETRI_TRANSITIONS=700} [2024-06-04 16:14:46,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 578 predicate places. [2024-06-04 16:14:46,908 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 700 transitions, 12188 flow [2024-06-04 16:14:46,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:46,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:46,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:46,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2024-06-04 16:14:46,908 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:46,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:46,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1717698855, now seen corresponding path program 9 times [2024-06-04 16:14:46,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:46,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758678226] [2024-06-04 16:14:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:46,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:47,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:47,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758678226] [2024-06-04 16:14:47,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758678226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:47,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:47,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:47,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229781718] [2024-06-04 16:14:47,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:47,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:47,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:47,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:47,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:47,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:14:47,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 700 transitions, 12188 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:47,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:47,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:14:47,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:49,039 INFO L124 PetriNetUnfolderBase]: 4035/6758 cut-off events. [2024-06-04 16:14:49,039 INFO L125 PetriNetUnfolderBase]: For 722736/722742 co-relation queries the response was YES. [2024-06-04 16:14:49,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51260 conditions, 6758 events. 4035/6758 cut-off events. For 722736/722742 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 47023 event pairs, 823 based on Foata normal form. 14/6772 useless extension candidates. Maximal degree in co-relation 51003. Up to 5920 conditions per place. [2024-06-04 16:14:49,163 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 586 selfloop transitions, 132 changer transitions 0/724 dead transitions. [2024-06-04 16:14:49,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 724 transitions, 13751 flow [2024-06-04 16:14:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-04 16:14:49,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-04 16:14:49,165 INFO L175 Difference]: Start difference. First operand has 620 places, 700 transitions, 12188 flow. Second operand 9 states and 195 transitions. [2024-06-04 16:14:49,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 724 transitions, 13751 flow [2024-06-04 16:14:55,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 724 transitions, 13473 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-04 16:14:55,614 INFO L231 Difference]: Finished difference. Result has 620 places, 701 transitions, 12235 flow [2024-06-04 16:14:55,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11912, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12235, PETRI_PLACES=620, PETRI_TRANSITIONS=701} [2024-06-04 16:14:55,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 578 predicate places. [2024-06-04 16:14:55,614 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 701 transitions, 12235 flow [2024-06-04 16:14:55,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:55,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:55,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:55,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2024-06-04 16:14:55,615 INFO L420 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:55,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:55,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1717550613, now seen corresponding path program 5 times [2024-06-04 16:14:55,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:55,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633781080] [2024-06-04 16:14:55,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:55,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:55,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:55,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633781080] [2024-06-04 16:14:55,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633781080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:55,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:55,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:55,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100517307] [2024-06-04 16:14:55,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:55,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:55,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:55,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:55,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:55,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:14:55,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 701 transitions, 12235 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:55,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:55,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:14:55,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:57,730 INFO L124 PetriNetUnfolderBase]: 4022/6736 cut-off events. [2024-06-04 16:14:57,730 INFO L125 PetriNetUnfolderBase]: For 639784/639784 co-relation queries the response was YES. [2024-06-04 16:14:57,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50180 conditions, 6736 events. 4022/6736 cut-off events. For 639784/639784 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 46798 event pairs, 672 based on Foata normal form. 6/6741 useless extension candidates. Maximal degree in co-relation 49922. Up to 5182 conditions per place. [2024-06-04 16:14:57,857 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 588 selfloop transitions, 137 changer transitions 0/731 dead transitions. [2024-06-04 16:14:57,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 731 transitions, 13813 flow [2024-06-04 16:14:57,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:14:57,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-04 16:14:57,858 INFO L175 Difference]: Start difference. First operand has 620 places, 701 transitions, 12235 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:14:57,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 731 transitions, 13813 flow [2024-06-04 16:15:03,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 731 transitions, 13533 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:03,629 INFO L231 Difference]: Finished difference. Result has 620 places, 701 transitions, 12241 flow [2024-06-04 16:15:03,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11955, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12241, PETRI_PLACES=620, PETRI_TRANSITIONS=701} [2024-06-04 16:15:03,630 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 578 predicate places. [2024-06-04 16:15:03,630 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 701 transitions, 12241 flow [2024-06-04 16:15:03,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:03,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:03,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:03,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2024-06-04 16:15:03,630 INFO L420 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:03,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:03,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1717550985, now seen corresponding path program 10 times [2024-06-04 16:15:03,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:03,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560052398] [2024-06-04 16:15:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:03,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:03,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:03,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560052398] [2024-06-04 16:15:03,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560052398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:03,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:03,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:03,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085974132] [2024-06-04 16:15:03,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:03,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:03,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:03,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:03,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:03,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:03,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 701 transitions, 12241 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:03,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:03,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:03,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:05,864 INFO L124 PetriNetUnfolderBase]: 4067/6814 cut-off events. [2024-06-04 16:15:05,865 INFO L125 PetriNetUnfolderBase]: For 643823/643829 co-relation queries the response was YES. [2024-06-04 16:15:05,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50805 conditions, 6814 events. 4067/6814 cut-off events. For 643823/643829 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 47521 event pairs, 729 based on Foata normal form. 12/6826 useless extension candidates. Maximal degree in co-relation 50546. Up to 5607 conditions per place. [2024-06-04 16:15:06,006 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 582 selfloop transitions, 147 changer transitions 0/735 dead transitions. [2024-06-04 16:15:06,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 735 transitions, 13934 flow [2024-06-04 16:15:06,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:06,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:06,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-04 16:15:06,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-04 16:15:06,007 INFO L175 Difference]: Start difference. First operand has 620 places, 701 transitions, 12241 flow. Second operand 9 states and 201 transitions. [2024-06-04 16:15:06,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 735 transitions, 13934 flow [2024-06-04 16:15:12,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 735 transitions, 13556 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:12,186 INFO L231 Difference]: Finished difference. Result has 622 places, 706 transitions, 12354 flow [2024-06-04 16:15:12,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11874, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12354, PETRI_PLACES=622, PETRI_TRANSITIONS=706} [2024-06-04 16:15:12,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 580 predicate places. [2024-06-04 16:15:12,187 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 706 transitions, 12354 flow [2024-06-04 16:15:12,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:12,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:12,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:12,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2024-06-04 16:15:12,187 INFO L420 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:12,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:12,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1723276437, now seen corresponding path program 2 times [2024-06-04 16:15:12,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:12,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979846108] [2024-06-04 16:15:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:12,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:12,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:12,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979846108] [2024-06-04 16:15:12,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979846108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:12,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:12,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:12,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903563245] [2024-06-04 16:15:12,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:12,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:12,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:12,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:12,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:12,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 706 transitions, 12354 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:12,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:12,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:12,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:14,475 INFO L124 PetriNetUnfolderBase]: 4087/6844 cut-off events. [2024-06-04 16:15:14,475 INFO L125 PetriNetUnfolderBase]: For 636015/636021 co-relation queries the response was YES. [2024-06-04 16:15:14,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51133 conditions, 6844 events. 4087/6844 cut-off events. For 636015/636021 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 47696 event pairs, 796 based on Foata normal form. 12/6856 useless extension candidates. Maximal degree in co-relation 50873. Up to 5728 conditions per place. [2024-06-04 16:15:14,621 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 577 selfloop transitions, 152 changer transitions 0/735 dead transitions. [2024-06-04 16:15:14,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 735 transitions, 13954 flow [2024-06-04 16:15:14,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:15:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:15:14,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-04 16:15:14,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516629711751663 [2024-06-04 16:15:14,622 INFO L175 Difference]: Start difference. First operand has 622 places, 706 transitions, 12354 flow. Second operand 11 states and 233 transitions. [2024-06-04 16:15:14,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 735 transitions, 13954 flow [2024-06-04 16:15:20,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 735 transitions, 13686 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:20,401 INFO L231 Difference]: Finished difference. Result has 626 places, 707 transitions, 12434 flow [2024-06-04 16:15:20,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12086, PETRI_DIFFERENCE_MINUEND_PLACES=615, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12434, PETRI_PLACES=626, PETRI_TRANSITIONS=707} [2024-06-04 16:15:20,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 584 predicate places. [2024-06-04 16:15:20,402 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 707 transitions, 12434 flow [2024-06-04 16:15:20,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:20,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:20,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:20,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2024-06-04 16:15:20,402 INFO L420 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:20,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:20,402 INFO L85 PathProgramCache]: Analyzing trace with hash 454777819, now seen corresponding path program 2 times [2024-06-04 16:15:20,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:20,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708091057] [2024-06-04 16:15:20,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:20,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:20,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:20,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708091057] [2024-06-04 16:15:20,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708091057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:20,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:20,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:20,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731467083] [2024-06-04 16:15:20,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:20,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:20,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:20,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:20,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:20,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:20,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 707 transitions, 12434 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:20,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:20,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:20,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:22,608 INFO L124 PetriNetUnfolderBase]: 4107/6879 cut-off events. [2024-06-04 16:15:22,608 INFO L125 PetriNetUnfolderBase]: For 634418/634420 co-relation queries the response was YES. [2024-06-04 16:15:22,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51309 conditions, 6879 events. 4107/6879 cut-off events. For 634418/634420 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 48008 event pairs, 859 based on Foata normal form. 8/6886 useless extension candidates. Maximal degree in co-relation 51049. Up to 6061 conditions per place. [2024-06-04 16:15:22,746 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 619 selfloop transitions, 101 changer transitions 0/726 dead transitions. [2024-06-04 16:15:22,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 726 transitions, 14006 flow [2024-06-04 16:15:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:22,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-04 16:15:22,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-04 16:15:22,747 INFO L175 Difference]: Start difference. First operand has 626 places, 707 transitions, 12434 flow. Second operand 7 states and 156 transitions. [2024-06-04 16:15:22,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 726 transitions, 14006 flow [2024-06-04 16:15:30,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 726 transitions, 13682 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-04 16:15:30,029 INFO L231 Difference]: Finished difference. Result has 623 places, 708 transitions, 12354 flow [2024-06-04 16:15:30,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12110, PETRI_DIFFERENCE_MINUEND_PLACES=616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12354, PETRI_PLACES=623, PETRI_TRANSITIONS=708} [2024-06-04 16:15:30,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 581 predicate places. [2024-06-04 16:15:30,029 INFO L495 AbstractCegarLoop]: Abstraction has has 623 places, 708 transitions, 12354 flow [2024-06-04 16:15:30,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:30,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:30,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:30,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2024-06-04 16:15:30,029 INFO L420 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:30,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:30,030 INFO L85 PathProgramCache]: Analyzing trace with hash 198277495, now seen corresponding path program 3 times [2024-06-04 16:15:30,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:30,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243343673] [2024-06-04 16:15:30,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:30,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:30,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:30,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243343673] [2024-06-04 16:15:30,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243343673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:30,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:30,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:30,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326100270] [2024-06-04 16:15:30,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:30,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:30,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:30,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:30,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:30,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 708 transitions, 12354 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:30,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:30,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:30,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15